|[AMRadio] Mod Transformer Available (message clarified)|
k4kyv at hotmail.com
Wed Sep 28 17:21:52 EDT 2005
Let me resend the message in case anyone couldn't figure it out. Evidently
the software that runs this message board doesn't recognise the "ohms"
>>The ratings are 5500 primary 1.14 KVA, and 5500 secondary
>>198 Amp DC.
>I don't know what you mean by don't add up! The discussion
>was pertaining to the use of this particular transformer, in
>conjunction with a specific set of tubes, and RF stage.
>What doesn't add up?
The tagged ratings of the transformer. 1.14 kva means it is rated for about
a kw of audio (theoretically 1140 watts with perfect power factor) just
call it a kw to account for some inevitable phase shift. That means it
should be designed to modulate 2 kw DC input. But with the maximum current
rating of .198 amps, to get 2 kw DC input, you would need 10,101 volts on
the plate. The rated load impedance is 5500 ohms. 10 kv @ 198 mills is
There is no way you can run the transformer at maximum rated DC secondary
current, at maximum rated power level, and maintain the nominal load
impedance of 5500 ohms.
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