Hi all
Ok, so my newly built PP KT88 Bill amp is working fine now and Im most impressed with the sound. Thanks to all who helped me with the troubleshooting.
Now I have some iron left over like PTX and OPT´s and I was thinking that maybe I would use the same schematic as for the KT88´s but adapt it for
EL34 tubes.
I understand I have to lower the anodedissipation but how do I do it?
Cheers
Ok, so my newly built PP KT88 Bill amp is working fine now and Im most impressed with the sound. Thanks to all who helped me with the troubleshooting.
Now I have some iron left over like PTX and OPT´s and I was thinking that maybe I would use the same schematic as for the KT88´s but adapt it for
EL34 tubes.
I understand I have to lower the anodedissipation but how do I do it?
Cheers
Hi Jaap
Well I did ask around for some advice for an integrated stereo PP amp schematic but there wasn´t anything that ticked all the boxes. I would like to use EL34 tubes as output tubes and I have transformers, no chokes. Anyway, what would you suggest?
Cheers
I have myself built the PP-1C with el34 and e88cc tubes. I am sure this design is a step ahead of the Bill.
The engineers amp of Pete Millett has a lot of documentation on this forum. It uses 4 dollar output tubes and I expect it to be better than the Bill too.
Hi Jaap
Well I would like to do without PCB and too many caps so I think Pete´s amp is out of the question, thanks anyway. Seams hard to find an integrated amp schematic that could work.
Cheers
I am building Pete's amp point to point.
too many caps ? I don't get that.
Finding schematics for PP amps that work is rather easy, google is your friend.
You can also look voor KT66/88, or 6550 designs.
Attachments
Hey Jaap
The musicangel schematic looks interesting, thanks. I will look closer at it and get back to you. About caps, At first glance of the picture I thought there where many caps but maybe not.
Cheers
Below is one possible circuit. This is a full octal tube design, now shown with 6L6's but I have also tested this with EL34's and 4,4 k OPT with good results. With 6L6's the power output is some 35 W. With your transformers the output would be more than 50 W.
An externally hosted image should be here but it was not working when we last tested it.
some time ago I would have liked to build this one
unfortunately forgot all about it
6B4G Push-Pull Amp
unfortunately forgot all about it
6B4G Push-Pull Amp
That is not a musicangel. But Musical Machine.
Also something I would consider.
An electronic choke. http://www.diyaudio.com/forums/power-supplies/155657-mosfet-gyrator-using-irf840.html
as in Poindexter(AudioTropic) http://www.diyaudio.com/forums/tubes-valves/160170-new-project-musical-machine.html
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