Tube Amp Archive

Hi, OT was dead off !

Regards

Hello I have a 63 Tremolux that worked very well until last week. Now, when I play, after a certain amount of random time, the sound gets dirty and I feel like I'm losing power. I'm playing with vol pot on 5. Same problem on the 2 channels. Phase inverter tube, Power tube ? Can you give me some lead...

Hi, for NFB on 5e3, just look at 6g2 princeton schematic. You need to remove one cap and add one 56k resistor. I did it on mine and love the tone ! Try it !

No, just another power outlet on the wall. My Tweed Deluxe that is very silent, buzz too on this outlet.

Hi,

Heater wiring it's ok now. Less hum.

I plugged amp in an other outlet and then, no hum !!! I don't understand how it's possible ?

Thank you for the help.

I'm gonna to remake heater wiring. Something i don't like to do

If i put one of the red arrow to ground, hum disappear. No effect when i do the same on blue arrows, even if i put the 3 arrows in the same time to ground.

[IMG:200:162]http://www.image-share.com/upload/2962/137m.jpg[/img]

0 VAC

The loop tube is remove.

I tried several other tubes with no result. I'm gonna consider elevating the heater supply 50-70V.

Thx.

Hi, I don't know why, but fuse blow again if i don't wait 30s between stand by off and power off. Ceriatone put 3A fuse on the primary of their 100W Marshall. I do it and it seems ok now. On the other side, i have hum. [IMG:200:162]http://www.image-share.com/upload/2960/107m.jpg[/img] I got 0.1V pic...

Sqrt(2)=1.41 not 2.14

I found this on http://www.tedweber.com/:

[img2313]http://www.tedweber.com/media/kits/6a40_schem.jpg[/img]

2700 for 8 ohms tap ! I don't understand.

So, i use 820 and the 2 ohms tap for the NFB and the 8 ohms tap for the speakers ?

If I use 1k5 (2*820) and use the 8 ohms tape for NFB and speaker, it will be the same, no ? Deluxe reverb use 820/47 with 8 ohms tap. Same ratio !

The 2 speakers see half of the power each and are 35 W speakers.

Oops, Sorry for my bad english. I changed it. Thank you.