Hey.
I’m getting 332 on the plate, and 52 on the cathode. I’m driving them on my bench with a Schiit headphone amp that has a pre out. Guess I should hook it up to my Cary SLP-30 to try it with a proper source…
I’m getting 332 on the plate, and 52 on the cathode. I’m driving them on my bench with a Schiit headphone amp that has a pre out. Guess I should hook it up to my Cary SLP-30 to try it with a proper source…
Yeah, I was expecting them to come down, but couldn’t confirm until I got the tubes. Heater voltages are closer to “normal” now. They are all .3V over (6.6, 5.3 and 2.8) And I could check/set B+ until I got the tubes in place.
I’m getting 345 on each of the plates. There is no info on what the voltage is supposed to be? I just checked the B+, and it’s 345….
Guess that’s too high.
I had the shunt resistor hooked up when I dropped the tubes in and was getting B+ of 285. Amp was making the same distortion with those voltages.
Thanks!
Guess that’s too high.
I had the shunt resistor hooked up when I dropped the tubes in and was getting B+ of 285. Amp was making the same distortion with those voltages.
Thanks!
6SN7's arent drawing much or any current. Should be about 200-250VDC. Are the cathode bypass caps wired correctly?
Thanks! I just checked and the cathode bypass caps, and bypass resistors are coming off pins 3 and 6. The caps are the AN non polarized kind.
You know the definition of insanity. Doing the same thing over and over expecting a different outcome, kinda feeling that now 🙂
Going out for a quick bit of “fresh air”
Will go over again in a minute.
Thanks!
Going out for a quick bit of “fresh air”
Will go over again in a minute.
Thanks!
Ok.
Pulled the bypass caps from the 6SN7’s, measured them w a Peak ESR70, and they are good. Checked the continuity/values of the cathode resistors and they are reading as 820ohm as per the schematic.
I checked the voltage drop across the 1K resistors in the PS between the two 50uf caps, and the drop is nominal ???
Pulled the bypass caps from the 6SN7’s, measured them w a Peak ESR70, and they are good. Checked the continuity/values of the cathode resistors and they are reading as 820ohm as per the schematic.
I checked the voltage drop across the 1K resistors in the PS between the two 50uf caps, and the drop is nominal ???
Attachments
And the 1M input resistors are connected and grounded as they should be. I checked both at the socket and from the line in to ground. 1Mohm
Think I just figured it out, will confirm tomorrow when I get back on the bench. I think I may have put 820K resistors on the cathode of the 6SN7. Saw 820 on the meter, but didn’t look for a “K”…
So yeah, I put the wrong resistors in.
Popped in 820’s, and it’s as it should be!!!
Getting 150v on the plate of the 6SN7, and it’s sounding “normal”
Thank you so much for your help!
Per
Popped in 820’s, and it’s as it should be!!!
Getting 150v on the plate of the 6SN7, and it’s sounding “normal”
Thank you so much for your help!
Per