ampage Tube Amps / Music Electronics	For current discussions, please visit Music Electronics Forum.	New: view Recent Searches. New: visit Schematic Hell! The sunn still shines online!

Listen to great tunes streaming live right now!

ampage archive

Vintage threads from the first ten years

previous: rebel420 that's the EXACT amp I have... quit... -- 2/26/2000 7:35 AM	View Thread

Re: Odd Schematic needed

2/28/2000 7:44 PM
MBSetzer	Re: Odd Schematic needed Well, Didn't get to draw the schemo this weekend, but I did just post the digital pictures, on the close-up you can see a good example of mid-air soldering, my specialty. I didn't work on this amp yet, it came that way. They are on my AOL page which I have never turned into a real web page: http://members.aol.com/MBsetzer Click on Davis106A.jpg and Davis106B.jpg. There is also the one-tube preamp I started modifying earlier, it was a neat acquisition with a solid copper chassis, it is a Dynamic Preamp Model PA110. It is now working, even with the original Dry Electrolytic cap and selenium rectifier. The way I've got it set up now (with a 6186 replacing the incorrect 6AQ5 that was in there) I am getting a measurable gain of 90 from this single cold-war pentode. A 500mv P-P guitar signal input produces 45V P-P from the output, should be enough to drive a power amp fairly well by itself. IIRC on one picture there is a 12AX7 placed next to the 6186 to show the difference in tube size. Hang in there & I should have the davis amp figured out before too long . . . BTW Reb, I liked the audio files on your site, sounds like you are doing some nice work. You might check out the MP3 & WAV files at mine just for grins, I'll post the PA110 clips as soon as it is tweaked, big difference this preamp makes, I already like it better than the Crate TDP which is a good (discontinued)commercial unit with lots of knobs, even without a knob this thing rocks . . . Best Regards, Mike

2/28/2000 7:44 PM

MBSetzer

Re: Odd Schematic needed

Well,

Didn't get to draw the schemo this weekend, but I did just post the digital pictures, on the close-up you can see a good example of mid-air soldering, my *specialty*. I didn't work on this amp yet, it came that way.

They are on my AOL page which I have never turned into a real web page:

http://members.aol.com/MBsetzer

Click on Davis106A.jpg and Davis106B.jpg.

There is also the one-tube preamp I started modifying earlier, it was a neat acquisition with a solid copper chassis, it is a Dynamic Preamp Model PA110. It is now working, even with the original *Dry Electrolytic* cap and selenium rectifier. The way I've got it set up now (with a 6186 replacing the incorrect 6AQ5 that was in there) I am getting a measurable gain of 90 from this single cold-war pentode. A 500mv P-P guitar signal input produces 45V P-P from the output, should be enough to drive a power amp fairly well by itself. IIRC on one picture there is a 12AX7 placed next to the 6186 to show the difference in tube size.

Hang in there & I should have the davis amp figured out before too long . . .

BTW Reb, I liked the audio files on your site, sounds like you are doing some nice work.

You might check out the MP3 & WAV files at mine just for grins, I'll post the PA110 clips as soon as it is tweaked, big difference this preamp makes, I already like it better than the Crate TDP which is a good (discontinued)commercial unit with lots of knobs, even without a knob this thing rocks . . .

Best Regards,
Mike

Replies:

Rebel420 Thanx for the compliments and yoru ... -- 2/28/2000 7:56 PM