"Richard Knoppow" wrote in message
nk.net...
"Don" wrote in message
oups.com...
I need an audio output transformer for an NC-120, which I
understand is
the same as the military RAO. I have also been told the
NC-100 is the
civiliam model. The ROA-2 manual lists the transformer as
36000 ohms to
600 ohms but the NC-100 manual lists it as 5000 ohms to
500 ohms. Is
the 36000 a misprint? The transformer couples the 6V6 to
the
loudspeaker. The National number on the transformer can I
took out of
my NC-120 is CNA-30884
Thanks
The NC-100 has a number of differences from the RAO, for
one thing is has 2 RF stages. The two use different output
I mean the RAO has the extra RF stage.
tubes which may account for the different transformer. 36K
does sound like a rather high load impedance for a 6K6
though, more typical is around 10K. The only power output
spec I could find is for the headphone jack, which is
parallel with the speaker terminals, 0.3 watt, that's low
for a 6K6, more typical would be around 2 watts.
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Richard Knoppow
Los Angeles, CA, USA