Hi Everyone,
I just finished putting together the tweed kit. This is my first amp build, I had planned on building it slowly over a couple of weeks but found that if I was home I couldn't leave it alone. Unable to concentrate on anything else I went for it and finished it last night. Everything went relatively smoothly and it worked right off the bat but there are a few issues. It was way too much fun! And it sounds great.
The 2 obvious problems that I have found are 1- it's a bit noisy, (hum) which gets louder as I turn up the volume.
-The amp isn't in a cabinet yet and from what I understand they are quieter when mounted in the cabinet so that could be it. also, I didn't shorten the coaxial cable and I ran it under the board to the volume control is that OK. It would be easy to shorten it. where is the best place to run it?
2- the heater voltages are 3VAC from the tube pins to ground.
The other voltages are: with a JJ5Y3 AC mains 116V B+ 356
V1, 12AY7 Pin 1, 125V Pin 3, 1.8V Pin 6, 117V Pin 8, 1.8V
V2, 12AX7 Pin 1, 149V Pin 3, 1.2V Pin 6, 182V Pin 7, 15.6V Pin 8, 44V
V3, 6V6 Pin 3, 343 Pin 4, 307 Pin 8, 18.8
V4, 6V6 Pin 3, 341V Pin 4, 310V Pin 8, 19V
The rectifier voltages are Pin 4, 337V Pin 6, 337V
On the board from left to right the voltages are: voltages listed on the layout in brackets
19V (22V) 310V (348V) 228V (255V) 44V (50V) 15.8V (18V) 183V (204V) 150V (158V) 1.2V (1.4V) 126V (130V) 118V (130V) 1.8V (2.0V)
Any comments/suggestions are really appreciated
Thanks Stephen for a great kit! Jim
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