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PP amp build

Posted by rage (A) on May 11, 2015 at 09:02:22

I decided I was tired of messing with the usual chassis materials and bought a 12U rack to build something like what I've seen in some old tube transmitters.

Hammond 1650R outputs, KT120 tubes, EL84 drivers, using the E-linear topology by Douglas.

Lots of work left to do... filament wiring, CCS for the drivers/phase splitter tubes...

Power supply is dual mono choke input, 1H 12 ohms dcr, followed by 240uf of capacitance that are GE oilers.. if I can fit more C in there I will yet.

I am a bit concerned about the lack of filtering given the front end runs off of the UL taps. I've considered adding a bunch of capacitance or another LC stage. I've got another pair of 1H chokes on hand I might put in.

The power transformers are TWO Antek 4T360 toroids in paralell into a Cree Schottky bridge.


Always welcome suggestions from this group! This has been a fun albeit slow build.

When done the DC2a3 amp goes back on the bench for more fun.

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