[Hammarlund] HX-500 trials

[Kenneth G. Gordon]

On 25 Apr 2016 at 19:56, D C _Mac_ Macdonald wrote:

> Maybe somebody converted a choke input power supply filter to capacitor input? 

That is a possibility:

If the DC voltage out of the rectifier stack was around 640 VDC, going cap-input would give 
around 900 VDC out of the filter (640 X 1.414 = 905), but choke input would show around 
575 VDC (640 X 0.9 = 576)

Or, if the choke was shorted, the filter would then actually be a capacitor-only filter. With 
~640 VDC out of the rectifier, the output voltage would be around 905 VDC as for a 
cap-input filter.

Seems to me that we have two problems here. Too high voltages, and an "issue" at the 
final.

Without killing himself, he could competely disconnect any and all filtering, then measure 
the voltage out of the rectifier. That would tell us something...

What is the AC voltage out of the transformer? That would also tell us something...

Ken W7EKB