Tube power supplies & grounding

[Doug Tymofichuk]

Happy New Year, everyone!

I have completed building a power supply for my tube synth 
(see attached gif). When I built the dual VCO module, I 
built separate high voltage and filament supplies just for 
it on the VCO chassis. So this power supply just supplies 
120 VAC to the VCO and then all the other appropriate 
voltages for the rest of the synthesizer.

There is a time delay relay that keeps the high voltage off 
(standby) for 30 seconds to allow the filaments to heat up 
first.

All filament power supplies are completely isolated from 
the rest of the circuitry.

The DC common/signal grounding system is set up as a "star" 
ground, and is not connected to the chassis earth at any 
point. My question is this: should the chassis/AC earth 
ground be connected to the DC common/signal ground 
directly, through a small capacitor, or not at all? (See 
dotted symbols in centre of diagram.)

Any other comments/suggestions/flames?

Thanks in advance!
----------------------
Doug Tymofichuk
dougt at cancerboard.ab.ca
-------------- next part --------------
A non-text attachment was scrubbed...
Name: tubeps.gif
Type: image/gif
Size: 10351 bytes
Desc: not available
URL: <http://synth-diy.org/pipermail/synth-diy/attachments/20000102/c20a0be9/attachment.gif>