July 2026 - Jukebox-list - lists.netlojix.com

Wurlitzer Volume box question
by M De Simone 03 Aug '26

03 Aug '26

Here’s one for the old timers, I’m working on a model 771 amplifier from a Wurlitzer 616 and the complaint is, “ There is significant hum primarily at 60Hz as seen in the attached spectrograms. The hum is 30dB SPL over the noise floor, is constant regardless of volume and is still there when the input is disconnected.” I set up the amplifier on my bench and played an iPod through it with field coil and volume box from the jukebox and I get perfect sound and dead quiet with or without input. I rebuilt the amp a few years ago but was surprised when I saw the volume box modification, it just had straight wires to volume pot and back out again. I’m only familiar with the mods for the 1940’s volume boxes. Is it different for these early amplifiers? I’m at a loss as to what might be causing this hum in his jukebox but was curious about the lack of resistor or capacitors in the volume box. Anybody familiar with these? Thanks, Mauro Sent from my iPhone

6 13

Test E-Mail
by Peter Brown 29 Jul '26

29 Jul '26

I received an email saying I was removed from the list because of too many bounces. Added the email to my contacts so hopefully this will stop it. Just testing to see if this email gets through. Have been missing the messages, thought things were just quiet. Peter

5 8

Ristaucrat non-select
by Hans Minderman 29 Jul '26

29 Jul '26

Working on restoring a non-selective ristaucrat and I'm puzzled about 2 cut off switches for the tone arm wiring. One cut off switch is a combination leaf switch in the front that also serves as the turntable power cutoff if no credits remain. The second cutoff is also a leaf switch that is currently activated during the record change. What puzzles me is that these switches are closed -making connection- when the system is inactive (switch 1 when power to the tt motor is cut b/c of no remaining credits and switch 2 during record exchange) while both these switches are open during record play. If anyone has any insights in this please let me know. I can find ways to bypass these switches but I prefer to hook everything up as intended. I suspect that leafswitch #2 should be closed during playing and should be opened during the record exchange. Those leafs were bent apart by a previous owner who did some creative bypassing. The other thing I don't quite get is why there would be two cut-off switches for the sound. Wouldn't one suffice? Thank you! Hans Sent from my Verizon, Samsung Galaxy smartphone Get Outlook for Android<https://aka.ms/AAb9ysg>

3 3

Final - Final Test
by Peter Brown 29 Jul '26

29 Jul '26

Tried setting up a mail rule. Last test I promise! Peter

2 1

6L6 - 6P3S
by Tony Miklos 25 Jul '26

25 Jul '26

Has anyone tried subbing a 6P3S for a 6L6? And how did it go?

3 3

Rider's Wurlitzer 1930s and 40s amps and auxilary amps!
by John Robertson 24 Jul '26

24 Jul '26

I have in my collection of manuals a bunch of Rider schematics I photocopied from a library back in the 90s and noticed I was missing a couple of pages so started looking to see if I could complete my collection. I did find them ALL on archive.org in Vol. 13 of the archived John F. Rider collection - and here is the link to the starting page of that Wurlitzer section: archive.org Rider's Perpetual Troubleshooter's Manual, Vol 1-23 with Index : John Rider : Free Download, Borrow, and Streaming : Internet Archive <#> Rider's schematics and servicing data for most tube radios. 🔗 https://archive.org/details/riders_202008/Vol%2013/page/n1577/mode/2up <https://archive.org/details/riders_202008/Vol%2013/page/n1577/mode/2up> at 30GB I'm unlikely to download the entire Rider library just yet, but if other folks want to rummage through the collection and see if Seeburg, AMI (Automatic Music Industry), Rockola, etc, and more Wurlitzer are present I won't stop them - so long as they post the links here. Note the Indexes are on the upper left of the list of volumes. Wurlitzer appears in Vol 4, 5, W6, W7, 8, and 13 according to the first index. I hope I've helped a few folk with this post today... John :-#)# -- John's Jukes Ltd. 7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 Call (604)872-5757 (Pinballs, Jukes, Video Games) flippers.com "Old pinballers never die, they just flip out"

2 2

Rockola 444 not working after tube light change
by connie cleek 21 Jul '26

21 Jul '26

Sent from my iPhone

1 0

I haven't had any emails for a few months, anyone out there ?
by Nigel Pugh 17 Jul '26

17 Jul '26

3 4

1939 Seeburg Amplifier Tone
by M De Simone 07 Jul '26

07 Jul '26

Hope everyone had a great July 4th weekend! I recently rebuilt a 1939 830-Z1 Seeburg amplifier and it works but the complaint is that the tone is too tinny and the bass control makes no difference when you adjust it, treble adjustment is good. The cartridge is an Astatic N51 and no modifications were done to the amplifier as I was under the impression that this amp worked well with this cartridge. Is there a recommended mod for this cartridge that I’m unaware of ? If not how would I tackle this issue? As always Appreciate the help, Mauro

1 0