[Milsurplus] TCK power supply

[Kenneth G. Gordon]

On 15 Apr 2017 at 13:17, Rob Flory wrote:

> Take heed of the voltage rating of the input capacitor on the B+ line.

I had thought of that, but have not yet taken the time to review the specifications of all the 
capacitors and other components in the circuit. I will do that before I build my supplies.

> I recall that it may be as low as 2kV.  This is going to play into the voltage regulation
> required on that supply and whether you are getting into swinging chokes and heavy
> bleeders.     

Got it, and thanks!

> I haven't lit mine up for a while but I think I was getting 500W CW at 1500V B+ but I was running 
> running a solid 500V on the medium voltage supply where Meir I think said was running 350. 

Yes. He told me that the other day.
 
> That supply wants to be real stiff to get chirp-free keying.  I used an aircraft dynamotor.

I have an extremely stiff 500 VDC supply I built many years ago for a certain professor's 
research project. When I retired, I was told to take anything that was no longer needed, so I 
still have that supply. I'll refurbish it and check it out throughly.

I DO have a couple of excellent NOS dynamotors, but they output 650 VDC and that is too 
much.

I have a "small" rack cabinet, a Bud unit, about 2 feet tall. I intend to build my supplies in 
that, put casters on the bottom, and set it along side my TCK under my operating bench, 
then cable between the two. I intend to use all (or most) of the TCK's normal control items to 
start, stop, and control the power supply. I want it to mimic as closely as possible the 
original AC supply, but in a much smaller form-factor and using modern components and 
circuitry.

Thank you for the advice.

Ken W7EKB

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