[Milsurplus] TCK power supply...

[Hubert Miller]

Well, ground is the casing of the transformer, and your  +HV is above this rating. It seems like the manufacturer REALLY wants you to use it in fullwave CT rectifier.
I know these transformers are handy, and you want to use them, but if you have to also use a voltage-correcting transformer with it, that seems like a less than elegant solution; 
bigger and heavier. I suppose the Motorola transformers were used with later tubes that drew more current at lower voltage. 
I think i'd keep looking.
-H 

>I have two very nice transformers here which were removed from some Motorola high-band transmitter or amplifier.

They are potted, very heavy, square jobs with ceramic posts to connect to. They have dual
115 VAC primaries, and a center-tapped secondary rated at 2500 VAC at 450 mA. 
continuous duty. According to the data printed on the transformers, their insulation has been tested to 4KV, but there is also a warning printed on them stating that their outputs should not be run at more than 1800 VDC to ground. 

I find this last "interesting" and can't quite figure out why this is there.

So, after doing some thinking about this last night, I thought that if I used a full-wave bridge rectifier on their outputs, I could reduce the primary voltage to 103 VAC (bucking transformer or Variac), which would limit the AC output to around 1600 VAC, which through the FWB, would supply up to 2250 VDC output from the diodes, which, if I am correct, puts the DC voltage at 450 VDC above the rated voltage to ground.

I think....

Anyone?

Ken W7EKB

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