[ARC5] YG,ZB and Lateral to Another Issue.
Kludge
wh7hg.hi at gmail.com
Sat Jul 2 17:29:30 EDT 2011
-----Original Message-----
From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On
Behalf Of David Stinson
> After knowing all this, why did A.R.C. go back
> to crank-tuned receivers and "broad" IFs
> to compensate for them in the post-war
> ARC-type-1x sets?
Okay, I'm speaking as a pilot who's flown with this equipment so have some
understanding of how it worked. As you've pointed out, ARC equipment was
stable and the only thing to deal with was the tuning crank moving due to
vibration. (It wasn't anything near as bad as the Narco VHT-3 Superhomer
with its coffee grinder right on the unit itself.) The ground equipment was
operating on published frequencies and were always on frequency so once
tuned, the only reason a signal would fade would be due to that vibration
and, with the cable drag, this usually didn't amount to a hill o' beans.
Since they were already using the tunable receivers in the R-13 used in the
Type 15 Omni Rx with good success, it made sense to continue with the same
design for the comm receivers.
Keep in mind, there are two different situations here. On one side, you've
got pilots in a combat situation who don't get an immediate answer to their
calls so start cranking like mad to "find" whoever they're trying to find.
On the other, you have a more relaxed civilian situation, whistlestop
tuning, transmitters known to stay put and responses that were fairly quick.
Now is it time for Kona and malasadas? :-D
Best regards,
Michael, WH7HG ex-K3MXO, ex-KN3MXO, WPE3ARS, BL01xh ex-Mensa A&P PP BGI
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