Is it normal that as you turn the reverb knob up, some hum increases? There is no hum when it's on 1. It starts humming above 4 and louder to 10. This hum isn't interact with the volume knob.
When I turn the reverb off with footswtich, low hum dissapears and higher buzz type hum remains...
I wanna install 1 ohm resistor in my EL 34 amp to measure cathode current.
Now, pin8, cathode is tied with pin1, G3.
so the order is Pin1 > Pin8 > ground.
Is it OK to just install 1 ohm resistor between Pin8 and ground?
Does Pin1 affect to measuring cathode current in any ways?
I have a TGA-3 early 75W.
Is this amp cathode biased?
Do I need to bias when changing power tubes?
Mine is selected 6CA7 or 6550.
I have a manual of TGA-3 100 which is 5881, 6550 or 6CA7.
Is it OK to use 5881 tube in mine?
I've tried to contact on Demeter website, but got no reply.
I've got a TGA-3. a good sounding 3 channel amp by Demeter.
Well, I have a problem with the 3 speaker impedances written on back panel.
They're 4, 8, 8 from left. I suppose this should be 4 8 16. Is this just wrong print?
Anybody have this amp? Mine is early version 75W.
I have a pair of "short base" Sovtek 5881.
I googled about this tubes and read that these are more like 6L6GC than 5881 which dissipation is 23W.
Is this true? so how much current would be correct at 450V plate voltage?
46.6ma? or 35.7ma?
Weber calculator says 40.4ma, but this is 70% of 26W...
Hi, I want to know about these amps.
I'm especially interested in single 6v6 amps like Supro 1606, Gretsch 6150.
The reason is my favorite rock guitarist Dean Deleo uses them.
A question is are they different than Fender champ or vibro champ?
I have a vibro champ which I really love its...
I'm considering to do Stokes mod for my Princeton (non reverb)
It's BF and has a 71' SF PT and an original OT.
I read some people say Stokes mod causes PT burn due to increase of power tube output.
so is the new larger PT necessary?
also, I'm thinking to install a Deluxe OT. Is the...
I have an original BF PR. and when I turn the volume around 3 or 4 it starts rattle a bit. At 10, it's terrible.
Is this common issue for this amp?
Now the speaker is a Jensen P10R. I have an original Jensen and a Fender Eminence blue alnico. All of them have this rattle, so I suppose it's not...
Hi, a power tranny on my Princeton 66' is replaced to 71' one.
This means the correct recti tube for mine is 5U4GB right? It's there now.
and I can't use GZ34?
I searched on this forum and other places. Some says they are interchangeable, others say no. I have no idea...
I'm thinking to buy this bias meter.
Anybody have experienced it?
Is this different from famous Bias King?
Hi, I'm a new here!
I'm going to do this heater mod for the VC.
Anybody have done? I'd like to see a pic if somebody could post it!
Here is my terrible sketch of it. Is...