eddie current dht filament

[kevin gilmore]

so due to a comment i made over there, someone wanted to know if i had the eddie current dht filament schematic. here it is.

 

eddiecurrentfilament.PDF

Edited October 3, 2022 by kevin gilmore

[justin]

you forgot the hand wound transformer !!

[jokerman777]

My ignorance but I'm curious what's the purpose of C14, C15 and R11 at the output of the power amp in this configuration? 

[kevin gilmore]

keeps any dc out of the transformers. even small amounts of dc would saturate the transformers real quick.

mikhail used the same circuit on the square wave instead of using a servo.

[Skooby]

Thanks Dr. Gilmore,

Got a pbc made from the schematic.  Played around with R1=120-ohm to get a good-enough sinusoidal wave; adjusting R2 and R3 to 10K to get 76kHz wave.  Hand-wounded trafo, not pretty but does the job...