"Iron Concertina" PP 2A3 amp

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Raj Gupta
Posts: 37
Joined: Fri Feb 11, 2005 2:19 am

"Iron Concertina" PP 2A3 amp

Post by Raj Gupta »

I was recently emailed by someone who had seen the partial description of my "Iron Concertina" design on my web site
and asked me for a full schematic, which I was happy to provide him. It uses the "chokertina" phase inverter
discussed elsewhere. I thought I'd post the schematic here for anybody who's interested (I'll update my webpage
someday, but that might be a while.) The files are: a power supply schematic, an audio schematic, and a
detail of the interstage transformer connection. (The IT I used was a Lundahl 1660 but I know someone
else who might supply an interstage transformer for this project.)

Enjoy!

-j
Attachments
This drawing shows the audio circuit design I used for the "Iron Concertina."
This drawing shows the audio circuit design I used for the "Iron Concertina."
Iron Concertina Audiosmall.jpg (45.7 KiB) Viewed 10624 times
This drawing shows the power supply circuit design I used for the "Iron Concertina."
This drawing shows the power supply circuit design I used for the "Iron Concertina."
Iron Concertina PSsmall.jpg (41.6 KiB) Viewed 10624 times
This drawing shows the connections I used with a Lundahl LL 1660 interstage transformer.
This drawing shows the connections I used with a Lundahl LL 1660 interstage transformer.
LL1660-ICconnection.jpg (30.35 KiB) Viewed 10626 times