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AMI E120 - Selector - I'm struggling
by Jamie McElroy 13 Dec '23

13 Dec '23

Hello, I have an AMI E120 jukebox. My junction box is putting out approximately 38 volts. I have credits on my credit unit, the credit unit light comes on. However, none of my selection buttons work. I cannot figure out what the problem is. Does anyone have any idea or help they can offer. I'm struggling for a couple weeks with this. Thank you for your help. Jamie

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Wurlitzer Lyric Flexible Drive
by Peter Johnson 13 Dec '23

13 Dec '23

Hope someone can help with this question. I have recently rebuilt a Wurlitzer Lyric for a friend who dismantled it 30 years ago? The flexible drive from the number selection unit is giving me problems, it tends to twist as it drives and stops/stalls turning the toothed selection wheel. I have soaked the outer sheath of the drive with a penetrating oil but doesn't make any difference. My next step is to remove it from the keyboard and see if I can examine it more closely to see what the problem is. Any help or advice would be greatly appreciated. Thankyou. Peter Johnson.

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Another APFEA1 Question
by Jukebox Repairman 13 Dec '23

13 Dec '23

Machine has credit Make selection but the Add solenoid on play control does not fully engage to start the mech scanning. It does start manually via the service switch. I visually observed the solenoid while a helper made a selection and I could see the solenoid plunger move slightly but not enough to activate motor control switch It acts like it’s only receiving a short pulse from the button selector. Thoughts?? Regards Rick

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Wurlitzer Lyric Flexible Drive
by Peter Johnson 13 Dec '23

13 Dec '23

Hope someone can help with this question. I have recently rebuilt a Wurlitzer Lyric for a friend who dismantled it 30 years ago? The flexible drive from the number selection unit is giving me problems, it tends to twist as it drives and stops/stalls turning the toothed selection wheel. I have soaked the outer sheath of the drive with a penetrating oil but doesn't make any difference. My next step is to remove it from the keyboard and see if I can examine it more closely to see what the problem is. Any help or advice would be greatly appreciated. Thankyou. Peter Johnson.

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Scope for Wurlitzer Amplifiers?
by Shankar Singh 12 Dec '23

12 Dec '23

Hello, Is this a suitable scope to troubleshoot Wurlitzer amplifiers? Would a signal injector be required as well? https://www.amazon.com/Oscilloscope-Persistence-Measurement-Bandwidth-Gener… I have only done a few basic repairs and servicing, so am still a novice. If it can be helpful, would appreciate early response; there is time constraint to ask a friend to assist with the purchase. Many thanks 🙏 SHANKAR SINGH

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MRA4-L6 Schematic
by Tony Miklos 12 Dec '23

12 Dec '23

I've looked and looked for a schematic for an MRA4. What model did they come in? I think someone told me that they came in hideaway units. I did somehow find a parts list for an MRA4, and it's very close to an MRA5, I'd just like to have the proper schematic. I don't mind buying a manual, but I don't know which one. The particular one I'm working on evidently fried the power supply choke and to make up for it, they made C1 out of 3 caps to get close to 300uF. Tony

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WurliTzer 2900 Top Tunes Installation.
by Shankar Singh 30 Nov '23

30 Nov '23

Hello there! Hope you are all doing well. I believe I now have all the components for the Top Tunes feature installation - Control Unit, Golden Bar & switch assy and the Latch Pin Actuator Arc Assy. I would re-cap and test the other components in the Control Unit. Would appreciate some advice for the following: Tips for servicing the arc assy. Can something be turned by hand to test the unit?Or should I plug up and test the arc unit before installing it onto the selector pin-bank unit? Tips for installing the components. Any instructions available that can be shared? The T.T Control Unit has a 12-pin socket, which appears to be for the Golden Bar Switch. It also has a 4-pin socket that looks like one for the Slug Rejector plug. Is the Slug Rejector now plugged in here and a jumper required for the Slug Rejector socket at the Coin Mech/Playrack? Many thanks! SHANKAR SINGH

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AMI E120 Gripper Arm Return
by Jamie McElroy 28 Nov '23

28 Nov '23

Hell all, can anyone help me with this problem please. When a even selection of a record is made the gripper arm returns the record to the proper slot it was selected from. However, when an odd selection is made and played, the gripper returns the record into the next slot on the record rack. This does not happen every time but 85% of the time it will when an odd selection is made. Any thoughts on this please. I'm going a bit crazy with it. Thank you for your help. Jamie

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Re: AMI E120 Gripper Arm Return
by Nigel Pugh 28 Nov '23

28 Nov '23

> > On 28 Nov 2023 at 16:29, Nigel Pugh <pughn(a)npsyssoft.force9.co.uk> wrote: > > > > It's been ages since I worked on an E, but if the gripper pivot design is similar to the g to continental 2, an a or b side lug engaged into the back of the gripper casting, operated by a solenoid and a bracket assembly. > > I'm thinking in your case, is that engaged correctly on the b sides, because if it isn't, the gripper will likely wobble and probably shove the record back in the wrong slot. > > Nigel, uk > > > > > > > > > > > > > > On 28 Nov 2023 at 15:49, David Breneman via Jukebox-list <> wrote: > > > > > > On Tuesday, November 28, 2023 at 07:34:22 AM PST, Jamie McElroy via Jukebox-list <jukebox-list(a)lists.netlojix.com> wrote: > > > > > When a > > > even selection of a record is made the gripper arm returns the record to > > > the proper slot it was selected from. However, when an odd selection is > > > made and played, the gripper returns the record into the next slot on the > > > record rack. > > > > When the odd numbered selection is removed from the rack, does it dragalong the record rack divider? My memory of the component name isfailing me, but if the lever switch on the carriage, when it strikes the selectionlever for an odd numbered record, is in the wrong position it will stop thecarriage too early or too late to put the carriage in the right position toremove and replace the record. The only other thing that would cause itto be returned to the wrong rack position would be if the carriage movedbetween the time the record is removed and replaced, and since you didn'tmention that happening (and I can't envision a condition that would causethat) I'm assuming it's an alignment issue. > > > > > > > > _______________________________________________ > > Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com > > To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com > > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > > Searchable Archives: http://jukebox.markmail.org/ >

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Seeburg APFEA1 Mech Issue
by Jukebox Repairman 28 Nov '23

28 Nov '23

I currently have this machine in the shop and troubleshooting an issue. With credit on the machine, a selection is made but the add solenoid in the control center does not engage fully to open the motor control switch. With the power removed, the plunger moves freely manually with no drag or bind. If I manually scan the mech via the service switch, the solenoid engages and the mech goes fully into scan mode. It acts like the solenoid is only receiving a short pulse. Does this sound like a faulty service switch or contacts in the Electrical Selector? Regards, Rick

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Wurlitzer 1400 cam wheel and pawl
by Tony Miklos 27 Nov '23

27 Nov '23

In this picture is part of the part #54394 "actuator lever & pawl assembly" and the #53410 "cam wheel". It appears to me that a roller should be on the pawl assembly, is this correct? https://i.postimg.cc/j2LfxyRW/101-9839.jpg https://i.postimg.cc/4yfK8MLR/101-9838.jpg

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Re: Seeburg needles
by Jens Hultgren 25 Nov '23

25 Nov '23

Purple needles is sapphire ttbomk Den lör 25 nov. 2023 09:00 <jukebox-list-request(a)lists.netlojix.com> skrev: > From: Jim McClave <juker17(a)yahoo.com> > Subject: [Jukebox-list] Seeburg Needles > To: Jukebox Mailing List <jukebox-list(a)lists.netlojix.com > > Seeburg STD 4 has 2 purple needles installed. Looks like the original > cartridge. Im assuming the yellow needles are now the correct > replacements? Thanks , Jim > >

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Seeburg Needles
by Jim McClave 24 Nov '23

24 Nov '23

Seeburg STD 4 has 2 purple needles installed. Looks like the original cartridge. Im assuming the yellow needles are now the correct replacements? Thanks , Jim

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Re: W532 scratchy sound
by Jukebox Repairman 15 Nov '23

15 Nov '23

Yes, I got your email. On Wed, Nov 15, 2023 at 9:25 AM David A. Kocian <dkocian(a)ix.netcom.com> wrote: > Sorry to hack your thread, but I have been trying to post to the list for > almost three weeks and my emails all come back as undeliverable. Just > wondering if you got this one. Not sure what is going wrong. I get all > the emails from the list just fine. > David Kocian > > -----Original Message----- > From: Jukebox mailing list <jukebox-list(a)lists.netlojix.com> > Sent: Nov 14, 2023 5:16 PM > To: Jukebox mailing list <jukebox-list(a)lists.netlojix.com> > Cc: Jukebox Repairman <jukin510(a)gmail.com> > Subject: [Jukebox-list] Re: W532 scratchy sound > > Mauro, I just had an 1800 with a cobra cart that was giving me the same > issues. Sent the cart to pfansteil for rebuild. Sounds great now. > > Regards > Rick > > On Tue, Nov 14, 2023 at 4:01 PM M De Simone via Jukebox-list wrote: > > > Thanks for the reply, > > I am feeding a signal from a W1700 test mech to my bench so I am using a > > Cobra cartridge. > > I did not hear the amplifier prior working on it as it was brought to me > > for repair. I am quite certain the issue would have been there before the > > work done. > > > > Mauro > > > > > > Sent from my iPhone > > > > > On Nov 14, 2023, at 3:22 PM, Jukebox Repairman via Jukebox-list > jukebox-list(a)lists.netlojix.com> wrote: > > > > > > What cartridge do you have it paired with? > > > What did it sound like before you updated it? > > > > > >> On Tue, Nov 14, 2023 at 3:01 PM M De Simone via Jukebox-list >> > jukebox-list(a)lists.netlojix.com> wrote: > > >> > > >> Good afternoon, I have recently been working on a Wurlitzer 532 > > amplifier > > >> and caps have been replaced and a couple of resistors that were out of > > >> tolerance. Tubes are all tested good and verified by swapping > > individually. > > >> The amplifier puts out good volume with defined bass and treble. > > >> The issue is that there is a slight scratchy sound in the high end of > > the > > >> spectrum. If I turn the treble to the lowest setting it masks it but > > >> anywhere else I can hear it if I listen closely. > > >> Before I blame it my test setup is like to ask, could the pec1 or pec2 > > >> cause this, as I have not replaced them? > > >> Let me know what you think. > > >> Thanks, > > >> Mauro > > >> > > >> > > >> Sent from my iPhone > > >> _______________________________________________ > > >> Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com > > >> To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com > > >> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > > >> Searchable Archives: http://jukebox.markmail.org/ > > >> > > > _______________________________________________ > > > Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com > > > To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com > > > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > > > Searchable Archives: http://jukebox.markmail.org/ > > > > _______________________________________________ > > Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com > > To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com > > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > > Searchable Archives: http://jukebox.markmail.org/ > _______________________________________________ > Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com > To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com > %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s > Searchable Archives: http://jukebox.markmail.org/ > > >

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W532 scratchy sound
by M De Simone 14 Nov '23

14 Nov '23

Good afternoon, I have recently been working on a Wurlitzer 532 amplifier and caps have been replaced and a couple of resistors that were out of tolerance. Tubes are all tested good and verified by swapping individually. The amplifier puts out good volume with defined bass and treble. The issue is that there is a slight scratchy sound in the high end of the spectrum. If I turn the treble to the lowest setting it masks it but anywhere else I can hear it if I listen closely. Before I blame it my test setup is like to ask, could the pec1 or pec2 cause this, as I have not replaced them? Let me know what you think. Thanks, Mauro Sent from my iPhone

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Wurly 1250 selection problem
by Dean Carriveau 13 Nov '23

13 Nov '23

Hi all, My Wurlitzer 1250 was working perfectly and then refused selections when any of the twenty-four selection buttons are depressed. I checked the coin grinder and it runs, accepts coins and 24v goes to the make selection light so I know that transformer is good. I've been looking at the schematic and at a loss of where to begin. I was going to pull the junction box and and check the 24v transformer but it is supplying power to the selection light. Any thoughts? Dean

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Seeburg STD4 Color sheets
by Jim McClave 10 Nov '23

10 Nov '23

How do you remove the front door color sheets on a Seeburg STD4 ? I have taken the top metal rail off for access. Looks like they should just pull right up? Mine are stuck and trying not to force them too much. I have a feeling they are original and have gaskets , etc have hardened. Any one else have this problem? Jim

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seeburg shp3 amp
by Jim McClave 09 Nov '23

09 Nov '23

Loud buzzing noise whenever you play a record. Buzzing varies with volume control. replaced all the big electroltics already . any ideas:

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Non-Polarized
by Jim McClave 06 Nov '23

06 Nov '23

Can a non-polarized cap be replaced with a polarized cap? In reference to the 1500 mfd 35wvdc NP caps in the Sebburg SHP 3 amp.

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Wurlitzer 3300 Top Tunes Latch Pin Actuator Arc Assembly for 2900
by Shankar Singh 05 Nov '23

05 Nov '23

Hi guys, Could a W3300 TT latch pin assy physically fit on a W2900? If so, could I modify the wiring to work on the 2900? Thank you Regards, Shankar Singh

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Re: hf100r pupularity meter
by Lore Gianno 23 Oct '23

23 Oct '23

Hi, with the details in the discussion that you suggested here https://jukeboxaddicts.proboards.com/thread/3712/seeburg-100c-cancel-any-pin I was able to deeply understand the sequence of contact closure and understand where the problem was (it was not so clear from the manual): during the C contact closure SC should still be closed for a short time in order to provide path to ground while in my case this was not happening. Thanks to all for the support as always ------ Messaggio originale ------ Da jukebox-list-request(a)lists.netlojix.com A jukebox-list(a)lists.netlojix.com Data 16/10/2023 09:00:04 Oggetto Jukebox-list Digest, Vol 256, Issue 1 >Send Jukebox-list mailing list submissions to >jukebox-list(a)lists.netlojix.com > >To subscribe or unsubscribe via email, send a message with subject or >body 'help' to >jukebox-list-request(a)lists.netlojix.com > >You can reach the person managing the list at >jukebox-list-owner(a)lists.netlojix.com > >When replying, please edit your Subject line so it is more specific >than "Re: Contents of Jukebox-list digest..." > >Today's Topics: > > 1. Re: hf100r pupularity meter (Tony Miklos) > 2. Seeburg STD 4 Problem (Jim McClave) > 3. A "shocking" 6L6 problem (Tony Miklos) > 4. Re: A "shocking" 6L6 problem (Jay Hennigan) > 5. Re: A "shocking" 6L6 problem (Tony Miklos) > 6. Re: A "shocking" 6L6 problem (Paul Howlett) > 7. Re: A "shocking" 6L6 problem (Jay Hennigan) > 8. Re: OT: Is there no end to crazy? ;) (Chan Gade) > 9. Re: A "shocking" 6L6 problem (Chan Gade) > > >---------------------------------------------------------------------- > >Message: 1 >Date: Sun, 15 Oct 2023 07:31:16 -0400 >From: Tony Miklos <tonysjukeboxrepair(a)gmail.com> >Subject: [Jukebox-list] Re: hf100r pupularity meter >To: jukebox-list(a)lists.netlojix.com >Message-ID: <aedbb78c-1903-4993-8fa9-bef5202ff6fd(a)Gmail.Com> >Content-Type: text/plain; charset=UTF-8; format=flowed > >I thought he might understand it if put into different words. They are >called a "make before break" switch, meaning all three contacts make >before either of the others break. > >Tony > >On 10/14/2023 9:54 AM, Jukebox Repairman via Jukebox-list wrote: >> Isn’t that what I said? They are the only pair in the upper switch stack >> that make and break >> >> On Sat, Oct 14, 2023 at 7:43 AM Tony Miklos via Jukebox-list < >>jukebox-list(a)lists.netlojix.com> wrote: >> >>> I don't have a manual in front of me, they are in another building, and >>> unfortunately I don't have the contacts memorized (I should by now). >>> All I can say is that TWO contacts must be closed to energize that >>> coil. As the contact blade of one is pushed, all three contacts touch >>> for a split second. When it reaches the full lift height, it opens one >>> of them. If you follow the manual and adjust to the 64th of an inch, >>> you will get it right. Be sure to start with the first adjustment and >>> follow through to the last one, in the order they are written. >>> >>> Tony >>> >>> On 10/14/2023 6:12 AM, Lore Gianno via Jukebox-list wrote: >>>> Hi, >>>> yes I have the manual, looking at the diagram it seems the popularity >>>> meter is triggered by contact IC, but this is one that stays triggered >>>> during play so I have doubts... >>>> Anyway, I just cleaned all the contacts from upper and lower set of >>>> contacts, it seems better but not solved: sometimes stills stays >>>> energized. >>>> Can you please tell me exactly which contact is the one to look into? >>>> Thanks >>>> >>>> ------ Messaggio originale ------ >>>> Da "Jukebox Repairman" <jukin510(a)gmail.com> >>>> A "Jukebox mailing list" <jukebox-list(a)lists.netlojix.com>; "Lore >>>> Gianno" <lore.gianno(a)gmail.com> >>>> Data 13/10/2023 15:45:51 >>>> Oggetto Re: [Jukebox-list] hf100r pupularity meter >>>> >>>>> The upper switch stack has a set of contacts that make & break >>>>> controlling the pulse for that circuitry. They have to be clean, >>>>> grease / oil free and adjusted correctly. If you don’t have a manual >>>>> I’m happy to email a copy of that page but I’m away until Monday >>>>> >>>>> On Fri, Oct 13, 2023 at 4:36 AM Lore Gianno via Jukebox-list >>>>> <jukebox-list(a)lists.netlojix.com> wrote: >>>>>> Dear all, >>>>>> today I switched on my hf100r after 3 months of stand by and I have 2 >>>>>> issues (previously it was perfect): >>>>>> I select the song, when then the disc is taken and starts to play the >>>>>> popularity meter solenoid gets activated but it stays activated, >>>>>> thus I >>>>>> have to immediately shut off in order to avoid the solenoid burning. >>>>>> I had a look at the popularity meter block and it seems fine, but for >>>>>> some reasons the solenoid continues to get current... >>>>>> Where does the signal come from? Where should I look? >>>>>> I also noticed a second symptom: pressing the reset switch on the back >>>>>> to stop playing the record does neither work anymore. >>>>>> >>>>>> Any ideas? >>>>>> Thanks >>>>>> Lorenzo >>>>>> _______________________________________________ >>>>>> Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >>>>>> To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >>>>>> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >>>>>> Searchable Archives: http://jukebox.markmail.org/ >>>> _______________________________________________ >>>> Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >>>> To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >>>> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >>>> Searchable Archives: http://jukebox.markmail.org/ >>> _______________________________________________ >>> Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >>> To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >>> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >>> Searchable Archives: http://jukebox.markmail.org/ >> _______________________________________________ >> Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >> To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >> Searchable Archives: http://jukebox.markmail.org/ > >------------------------------ > >Message: 2 >Date: Sun, 15 Oct 2023 15:56:20 +0000 (UTC) >From: Jim McClave <juker17(a)yahoo.com> >Subject: [Jukebox-list] Seeburg STD 4 Problem >To: Jukebox Mailing List <jukebox-list(a)lists.netlojix.com> >Message-ID: <1045014787.6626762.1697385380684(a)mail.yahoo.com> >Content-Type: text/plain; charset=UTF-8 > >Working on the old "scans Twice doesnt pick up a record " problem. Going by the "symptom 3 troubleshooting guide. The write in voltage at the DCC reads @ 120 Vdc, but I dont see a drop when I make a selection. The guide mentions the write-in trigger. Seems like I dont have that trigger. Anyone else ever experience this ? > >------------------------------ > >Message: 3 >Date: Sun, 15 Oct 2023 20:13:48 -0400 >From: Tony Miklos <tonysjukeboxrepair(a)gmail.com> >Subject: [Jukebox-list] A "shocking" 6L6 problem >To: Jukebox mailing list <jukebox-list(a)lists.netlojix.com> >Message-ID: <10735202-7242-4e9b-b4e9-10d0ee127f88(a)Gmail.Com> >Content-Type: text/plain; charset=UTF-8; format=flowed > >Working on a Seeburg JL with metal cased RCA 6L6's. (don't recall >seeing those before) While trying to find an intermittent very loud >snap, crackle, and pop, I get a bit of a shock off the metal case of the >one 6L6. Turns out the plate is shorted to the metal enclosure! The >base must be a little small because the tube clips weren't grounding out >the B+, although it may have been intermittently and that may have been >the noise it was making. Put my meter on it and it was about 395vdc to >ground, .1 ohms from pin 3 to the metal case. > >Tony > > >------------------------------ > >Message: 4 >Date: Sun, 15 Oct 2023 17:38:48 -0700 >From: Jay Hennigan <jay(a)west.net> >Subject: [Jukebox-list] Re: A "shocking" 6L6 problem >To: Tony Miklos via Jukebox-list <jukebox-list(a)lists.netlojix.com> >Message-ID: <e072e4fb-3c73-67c0-25b0-d4b8e57eecec(a)west.net> >Content-Type: text/plain; charset=UTF-8; format=flowed > >On 10/15/23 17:13, Tony Miklos via Jukebox-list wrote: >> Working on a Seeburg JL with metal cased RCA 6L6's. (don't recall >> seeing those before) While trying to find an intermittent very loud >> snap, crackle, and pop, I get a bit of a shock off the metal case of the >> one 6L6. Turns out the plate is shorted to the metal enclosure! The >> base must be a little small because the tube clips weren't grounding out >> the B+, although it may have been intermittently and that may have been >> the noise it was making. Put my meter on it and it was about 395vdc to >> ground, .1 ohms from pin 3 to the metal case. > >Interesting! On metal 6L6s and most metal tubes the case is tied to pin >1 and this is usually grounded to chassis in the amplifier. > >Double-check the base of the tube and make sure that the center locating >pin hasn't broken off or been forced. You might be measuring pin 1. The >construction of the tubes has an interior glass envelope that insulates >the tube elements from the case. > >It's also possible that pin 1 was used as a hot tie-point, but in the >era of the JL, metal 6L6s were still somewhat common and I would think >Seeburg wouldn't have done that. > >Another possibility is that the phenolic base insulation broke down and >developed a carbon track between pin 3 and the case. > >-- >Jay Hennigan - jay(a)west.net >Network Engineering - CCIE #7880 >503 897-8550 - WB6RDV > > >------------------------------ > >Message: 5 >Date: Sun, 15 Oct 2023 20:49:08 -0400 >From: Tony Miklos <tonysjukeboxrepair(a)gmail.com> >Subject: [Jukebox-list] Re: A "shocking" 6L6 problem >To: jukebox-list(a)lists.netlojix.com >Message-ID: <4a453f96-623e-4369-8787-93d62cb189a0(a)Gmail.Com> >Content-Type: text/plain; charset=UTF-8; format=flowed > >I'll check that out tomorrow and report back. Whatever did go wrong, it >did have B+ voltage from it to ground (but zero from the other 6L6 to >ground). I always wondered how they got metal cases to seal good enough, >I didn't know they were glass inside! Now you have me thinking, if the >keyed pin in the center was off, and the tube was turned a few notches, >that would make sense for it to have B+ on the case. > >Tony > >On 10/15/2023 8:38 PM, Jay Hennigan via Jukebox-list wrote: >> On 10/15/23 17:13, Tony Miklos via Jukebox-list wrote: >>> Working on a Seeburg JL with metal cased RCA 6L6's. (don't recall >>> seeing those before) While trying to find an intermittent very loud >>> snap, crackle, and pop, I get a bit of a shock off the metal case of >>> the one 6L6. Turns out the plate is shorted to the metal enclosure! >>> The base must be a little small because the tube clips weren't >>> grounding out the B+, although it may have been intermittently and >>> that may have been the noise it was making. Put my meter on it and it >>> was about 395vdc to ground, .1 ohms from pin 3 to the metal case. >> >> Interesting! On metal 6L6s and most metal tubes the case is tied to >> pin 1 and this is usually grounded to chassis in the amplifier. >> >> Double-check the base of the tube and make sure that the center >> locating pin hasn't broken off or been forced. You might be measuring >> pin 1. The construction of the tubes has an interior glass envelope >> that insulates the tube elements from the case. >> >> It's also possible that pin 1 was used as a hot tie-point, but in the >> era of the JL, metal 6L6s were still somewhat common and I would think >> Seeburg wouldn't have done that. >> >> Another possibility is that the phenolic base insulation broke down >> and developed a carbon track between pin 3 and the case. >> > >------------------------------ > >Message: 6 >Date: Sun, 15 Oct 2023 21:39:57 -0400 >From: Paul Howlett <pinballpauls(a)gmail.com> >Subject: [Jukebox-list] Re: A "shocking" 6L6 problem >To: Jukebox mailing list <jukebox-list(a)lists.netlojix.com> >Message-ID: > <CAJrUz2iFuW6YZJKMgAVbc3Vn7pwTrfpdhZ-V5DaBSDkAV7Le9g(a)mail.gmail.com> >Content-Type: text/plain; charset="UTF-8" > >My experience with metal 6L6's is that if you touch one they give you a >hell of a burn. > >On Sun, Oct 15, 2023, 8:49 PM Tony Miklos via Jukebox-list < >jukebox-list(a)lists.netlojix.com> wrote: > >> I'll check that out tomorrow and report back. Whatever did go wrong, it >> did have B+ voltage from it to ground (but zero from the other 6L6 to >> ground). I always wondered how they got metal cases to seal good enough, >> I didn't know they were glass inside! Now you have me thinking, if the >> keyed pin in the center was off, and the tube was turned a few notches, >> that would make sense for it to have B+ on the case. >> >> Tony >> >> On 10/15/2023 8:38 PM, Jay Hennigan via Jukebox-list wrote: >> > On 10/15/23 17:13, Tony Miklos via Jukebox-list wrote: >> >> Working on a Seeburg JL with metal cased RCA 6L6's. (don't recall >> >> seeing those before) While trying to find an intermittent very loud >> >> snap, crackle, and pop, I get a bit of a shock off the metal case of >> >> the one 6L6. Turns out the plate is shorted to the metal enclosure! >> >> The base must be a little small because the tube clips weren't >> >> grounding out the B+, although it may have been intermittently and >> >> that may have been the noise it was making. Put my meter on it and it >> >> was about 395vdc to ground, .1 ohms from pin 3 to the metal case. >> > >> > Interesting! On metal 6L6s and most metal tubes the case is tied to >> > pin 1 and this is usually grounded to chassis in the amplifier. >> > >> > Double-check the base of the tube and make sure that the center >> > locating pin hasn't broken off or been forced. You might be measuring >> > pin 1. The construction of the tubes has an interior glass envelope >> > that insulates the tube elements from the case. >> > >> > It's also possible that pin 1 was used as a hot tie-point, but in the >> > era of the JL, metal 6L6s were still somewhat common and I would think >> > Seeburg wouldn't have done that. >> > >> > Another possibility is that the phenolic base insulation broke down >> > and developed a carbon track between pin 3 and the case. >> > >> _______________________________________________ >> Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >> To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >> %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >> Searchable Archives: http://jukebox.markmail.org/ > >------------------------------ > >Message: 7 >Date: Sun, 15 Oct 2023 19:27:01 -0700 >From: Jay Hennigan <jay(a)west.net> >Subject: [Jukebox-list] Re: A "shocking" 6L6 problem >To: jukebox-list(a)lists.netlojix.com >Message-ID: <5135f45b-fde7-3ce9-94bf-4e6a04787e00(a)west.net> >Content-Type: text/plain; charset=UTF-8; format=flowed > >On 10/15/23 17:49, Tony Miklos via Jukebox-list wrote: >> I'll check that out tomorrow and report back. Whatever did go wrong, it >> did have B+ voltage from it to ground (but zero from the other 6L6 to >> ground). I always wondered how they got metal cases to seal good enough, >> I didn't know they were glass inside! Now you have me thinking, if the >> keyed pin in the center was off, and the tube was turned a few notches, >> that would make sense for it to have B+ on the case. > >Definitely inspect the socket. Pin 1 should be either left floating or >preferably tied to ground. If it's used as a tie point there's no >problem with glass 6L6s but it will be connected to the case if a metal >tube is used. > >-- >Jay Hennigan - jay(a)west.net >Network Engineering - CCIE #7880 >503 897-8550 - WB6RDV > > >------------------------------ > >Message: 8 >Date: Mon, 16 Oct 2023 04:13:55 +0000 (UTC) >From: Chan Gade <chan.gade(a)yahoo.com> >Subject: [Jukebox-list] Re: OT: Is there no end to crazy? ;) >To: 'Jukebox list' <jukebox-list(a)lists.netlojix.com> >Cc: "D. Resor" <organlists1(a)sonic.net> >Message-ID: <1072310713.1071512.1697429635980(a)mail.yahoo.com> >Content-Type: text/plain; charset=UTF-8 > > It is a hobby. > >Not really crazier than people spending thousands of dollars to get and restore ancient commercial phonographs. > >Items were destined for the landfill and are now preserved for history. > >RobNYC > > > On Friday, October 13, 2023 at 03:15:28 PM GMT-5, D. Resor via Jukebox-list <jukebox-list(a)lists.netlojix.com> wrote: > > Western electric 12a,13a horn Speaker > >https://www.youtube.com/watch?v=HRkRnPrEMk8 > > >Don Resor > > > >_______________________________________________ >Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >%(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >Searchable Archives: http://jukebox.markmail.org/ > > >------------------------------ > >Message: 9 >Date: Mon, 16 Oct 2023 04:21:22 +0000 (UTC) >From: Chan Gade <chan.gade(a)yahoo.com> >Subject: [Jukebox-list] Re: A "shocking" 6L6 problem >To: Jukebox mailing list <jukebox-list(a)lists.netlojix.com> >Cc: Tony Miklos <tonysjukeboxrepair(a)gmail.com> >Message-ID: <1372593925.14529295.1697430082407(a)mail.yahoo.com> >Content-Type: text/plain; charset=UTF-8 > > Between semesters I was working for a co. that handled A.V. repairs for the NYC public schools. I perused their OEM files and service bulletins. One from Rheem Califone mentioned a model of their portable phono/PA units using 6L6 metal tubes causing shocks due to "capacitive conduction" internal to the tube. It sounds to me like it was really the sort of thing you experienced. The company offered free 6L6G replacements. > >RobNYC > > > On Sunday, October 15, 2023 at 07:14:30 PM GMT-5, Tony Miklos via Jukebox-list <jukebox-list(a)lists.netlojix.com> wrote: > > Working on a Seeburg JL with metal cased RCA 6L6's. (don't recall >seeing those before) While trying to find an intermittent very loud >snap, crackle, and pop, I get a bit of a shock off the metal case of the >one 6L6. Turns out the plate is shorted to the metal enclosure! The >base must be a little small because the tube clips weren't grounding out >the B+, although it may have been intermittently and that may have been >the noise it was making. Put my meter on it and it was about 395vdc to >ground, .1 ohms from pin 3 to the metal case. > >Tony > >_______________________________________________ >Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >%(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >Searchable Archives: http://jukebox.markmail.org/ > >------------------------------ > >Subject: Digest Footer > >_______________________________________________ >Jukebox-list mailing list -- jukebox-list(a)lists.netlojix.com >To unsubscribe send an email to jukebox-list-leave(a)lists.netlojix.com >%(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s >Searchable archives: http://jukebox.markmail.org/ > > >------------------------------ > >End of Jukebox-list Digest, Vol 256, Issue 1 >********************************************

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Audio Question
by Jukebox Repairman 18 Oct '23

18 Oct '23

I recently swapped out a defective Astatic cartridge with a Pfhansteil P51 on my personal 1015. Since the swap the audio seems to have lost a lot of low end and sounds “tinny.” Years ago when I restored it, I had added a Bill Bickers upgrade to the volume control box to improve the bass response. Obviously I’d like it to sound like it did before the swap.

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A "shocking" 6L6 problem
by Tony Miklos 17 Oct '23

17 Oct '23

Working on a Seeburg JL with metal cased RCA 6L6's. (don't recall seeing those before) While trying to find an intermittent very loud snap, crackle, and pop, I get a bit of a shock off the metal case of the one 6L6. Turns out the plate is shorted to the metal enclosure! The base must be a little small because the tube clips weren't grounding out the B+, although it may have been intermittently and that may have been the noise it was making. Put my meter on it and it was about 395vdc to ground, .1 ohms from pin 3 to the metal case. Tony

5 12

Seeburg Tormat Plug resistance
by Jim McClave 16 Oct '23

16 Oct '23

What should the resistance be on a Seeburg tormat rca-type plug on an STD 4 ? 160-tm7 tormat. I read a short from center pin to outer ground shell , Is this correct?

2 1

OT: Is there no end to crazy? ;)
by D. Resor 15 Oct '23

15 Oct '23

Western electric 12a,13a horn Speaker https://www.youtube.com/watch?v=HRkRnPrEMk8 Don Resor

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2025

2024

2023

Jukebox-list