[AMRadio] Re: RCA 1:1 mod xfmr

D. Chester k4kyv at charter.net
Sun Dec 2 00:02:44 EST 2007

The RCA 1:1 ratio mod xfmr @ 5500 was made for liberty ship transmitters 
during WW2.  It was not designed for voice, but for MCW, so it was meant for 
running a single tone, and is not  high-fidelity.  That's why its audio 
quality is on par with the  lowest cost "ham radio quality" modulation 
transformers, nowhere as good as RCA broadcast modulation transformers.  The 
quality  is quite acceptable if you are not looking for hi-fi audio.  With 
the 1:1 ratio, you should be able to get incredible positive peaks.  The 
properties of the transformer, as listed on the name plate, do not make 
sense if you calculate using ohm's law, that is, current through the 
secondary vs total power rating vs nominal impedance values.

Don k4kyv 

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