Search Result

[Enzo]

What TYPE are all these pans?

[Helmholtz]

Tube voltages look ok. Recovery stage should be working, even though point G voltage is high.
There should be a voltage drop of 5V to 6V across the...

[dragonwerx]

I am a newbie at this but it looks like at point G I have 280 Volts. I checked on both sides of the 1uf @450V electrolytic cap that I replaced, one side 280V,...

[Marshtech]

Rio Rancher - best if you start your own thread instead of jumping into this one.

[Helmholtz]

Please post requested voltages. I will tell you if they make sense and where there is a problem. Cathode voltage is one of the best indicators of proper tube...

[dragonwerx]

Doesn't matter where the depth control is, the thunder is very faint. I know the depth control is working because I can see the change in signal where the...

[Blosterc]

Good!!!!
thank you very much!
Now i check...

[Jon Snell]

...

[stokes]

I recently changed the power tubes,as one of them was rattling causing noise problems.When he first bought it to me I discovered the missing guide pins and...

[nevetslab]

The amp was packed into a relatively new road case, nice and cushioned, amp itself in like-new condition, apart from the stripped input jack threads. Just...

[nevetslab]

Once I had the replacement matched EL84 tubes installed, plate current settled in around 35mA. Stock amp, so no mods in place to tweak the bias....

[nevetslab]

Tube socket contacts were nice and tight, so wasn't that....

[nevetslab]

No plate resistors....just screen resistors, Plates connected to the primary of the OT of course. I didn't measure the IR drop across the screen resisto...

[Blosterc]

Hi, thanks for reply!
OK, i check all diodes.
Please wich filter caps?

[Helmholtz]

With depth control fully up, the thundering should be loud.

Indicates a reverb recovery problem.
Please post 7025 plate and cathode voltages...

[Rio Rancho]

I have had my Super Champ XD for about ten years with no trouble at all. Suddenly, yesterday, the Voice Selector no longer works properly. I mainly use voice...

[Enzo]

Just a notte: if you look at the top of this page in the bar along the top, you see Schematic Hell. CLick there and find most of the contents of the old...

[sstef]

after 13 years that domain is long gone, but i found the schematic, here is a new link for anyone who needs it

https://stef-dl.secdn.net/ste...

[Enzo]

F3, F4 blow? Those serve the 24v supplies. WHat is blowing the fuses? Start at the rectifier diodes those fuses serve. Possibly bad filter cap on one...

[Leo_Gnardo]

If you can peel the goop off I don't see any problem with that. OTOH why bother unless 1: you need to get at the board to repair something and/or 2: goop...

[Arbutt]

thanks. The link says its NLA , ebay have some from usa and china. Watford valves have some at over £10 each
But at least i know what to change it for...