Ted Zateslo wrote:
In article ,
Chuck Harris wrote:

ARRL published a circuit using it in many of their handbooks from the
'60s. And I have heard that it was used in TV applications, but the
part that surprises me is I have only seen one type, the 7360. If it
was such a commonly used tube, it surely would exist in a non industrial
numbered version (eg. 6ZZ9, or some such).


Chuck,
There was never a pin-for-pin "entertainment" version of the 7360,
but there were a few functionally-equivalent types, the 6AR8, 6JH8,
and maybe another (6M-something) I can't remember. They could be
used in the same circuits as the 7360, and they were cheaper
as they were made in much larger numbers (Zenith used the 6JH8 in
color-TV demodulator circuits). And they were used in ham gear
too -- my old Swan 260 "Cygnet" used a 6JH8 as the balanced mod.
These tubes did make great balanced modulators, and nice receiver
mixers too.

Ted Zateslo, W1XO

Hi Ted,

Thanks for the info. I thought I knew my old RCA RC-25 tube manual
pretty well; I bought it new, and the binding has all fallen apart,
but there they were just like you said.

I must have stopped mucking around with tube color tv's before they
became popular.

-Chuck