Hey John, thanks for the response. I’ve tested all the tubes and inserted voltage on the heater line with all tubes removed and it was better but as soon as I start putting in the tubes the current starts drawing more than usual. I still keep thinking back to the hum control pot. Can this affect the current draw if it’s missing? I also believe the output transformer needs to be replaced as resistance readings across the plates of the output tubes and centre tap of transformer differs by about 50%. I don’t think this would affect the heater circuit? Any help appreciated, Mauro
Sent from my iPhone
On Mar 6, 2024, at 8:36 PM, John Robertson via Jukebox-list jukebox-list@lists.netlojix.com wrote:
On 2024/03/06 4:57 p.m., M De Simone via Jukebox-list wrote:
I’m currently working on a V200 amplifier and can’t figure out where the current draw is coming from. I’ve isolated it to the 6.3 heater circuit but can’t find any issue with it. The only problem is the humidity adjustment is missing the wire wound section so it’s basically not doing anything. I put 2 resistors in place as a replacement but when I fire up the amp my amp meter starts rising and I shut it down between 2 and 3 amps. Usually when texting one of these amplifiers it slowly rises to about 1.5 amps and holds steady there. What am I missing here?
Start by unplugging all the tubes and see what happens. Then plug half of them in and see if the current is OK...then 1/2 of the remaining tubes...splitting problems in half speeds up the discovery process I find.
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"
Jukebox-list mailing list -- jukebox-list@lists.netlojix.com To unsubscribe send an email to jukebox-list-leave@lists.netlojix.com %(web_page_url)slistinfo%(cgiext)s/%(_internal_name)s Searchable Archives: http://jukebox.markmail.org/