Ps chokes

[xcortes]

Assuming one finds a way to place them, is there a reason not to replace the 300 ohm ps resistors with chokes? The good old c7x looks good there. Or a pair of BAC 80s that are 300 ohm DCR (maybe in a separate chassis with an umbilical). I already have a pair of BAC100s that  at 250 ohm DCR should work too.

[Paul Birkeland]

The BeePre high voltage current slightly exceeds the current rating of the C-7X. 

The Hammond 157M might be a good place to start, and there may be enough room on the outside edges of the chassis next to each power transformer.

-PB

[Grainger49]

Paul,

That answer shows real confidence in the transformer shielding.  I believe it is right.  Paully put some power supply chokes smack up against his Paramount transformers.  That is, directly behind them.  Neither of us ever heard any noise impressed on the power supply.

[caffeinator]

What kind of specs does a candidate choke need to possess?  Looking at the Hammonds that have been suggested, looks like at least 100mA DC current capability, around 260-300 Ohm DCR, and voltage of what - at least 400V?

[Paul Birkeland]

What kind of specs does a candidate choke need to possess?  Looking at the Hammonds that have been suggested, looks like at least 100mA DC current capability, around 260-300 Ohm DCR, and voltage of what - at least 400V?

Yeah, the voltage is much less important in the BeePre, 250V would be enough.  Keeping the DCR as close to 300 Ohms as possible will help avoid destruction and ensure proper operation of the C4S loads.