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RE: Filament Choke Questions and 4P1L Sources

Posted by Prospect (A) on April 15, 2016 at 09:49:56

In Reply to: RE: Filament Choke Questions and 4P1L Sources posted by KevinC on April 15, 2016 at 05:26:58:

Thanks, Kevin!

Your advice on sourcing the tubes sounds reasonable. I've had good luck on eBay (following careful, and hard-learned lessons).

After some searching I did find a schematic of Thomas's LCL filter. It does use just one filter bank (with 30k uF) and the last choke connects directly to the DHT. He uses the LL2733 choke.

If I'm calculating this right, a stereo implementation of his topology (4 chokes) would add about $400 to the project just for the filament supplies! The Coleman Regulators seems like a more feasible solution.

Thanks again for your help.

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