|[AMRadio] Unusual transformer|
ranickel at comcast.net
Sun Oct 22 12:26:53 EDT 2017
On 10/22/2017 10:52 AM, Donald Chester wrote:
> Looks like it's a modulation transformer designed to be fed with a 500-ohm line, instead of directly by the plates of the modulator tubes.
Ah! I think you're right, Don - especially makes sense because it was
part of a bunch of iron that came from a guy who built broadcast
transmitters back in the 30s when it was legal to do that, as well as
> 5M-6M-7M-8M-9M-10M means the same thing as 5K-6K-7K..., i.e. 5000, 6000, 7000 etc. "M" is sometimes used as an abbreviation for "mill" = thousand.
That abbreviation skipped right over me, but yes, "mill" was used before
the now-ubiquitous "K".
So, a useful transformer, especially if an old PA amp or such was rigged
to provide the 500 ohm drive.
Mystery solved, thanks!
73, Bob W9RAN
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