[Vintage-Radio] Old police radio questions

[Harry Marnell]

Great information, Craig, thank you!  2490 doesn't ring a bell with me,
but 1712 was LAPD's (and others') regular "phone" frequency for
dispatching.   L.A. and Orange County kind of shared the role of gateway
between California PDs and agencies in other states for RTTY and CW in
and out from the 1930s and well into the 40s.

I was just looking at an item from 1947 that says they were using
Tech-Rad 500-watt transmitters for the "inter-zone" (out-of state)
frequencies.  They had been using half-wave doublets, but were
installing a new "Sterba Curtain array" (whazzat?) beamed northeast
toward Denver's KGPX, the nearest contact point to California at even
that late date!  Apparently their daytime radiotelegraph propagation had
declined significantly during the war years as industry and other
sources generated ever more RFI.

Thanks again.

73

Harry / N6URU


  ----- Original Message ----- 
From: "Craig McCartney" <craigmc@pacbell.net>
To: "Harry Marnell" <marnell@cox.net>; <vintage-radio@mailman.qth.net>
Sent: Sunday, April 04, 2004 18:29
Subject: RE: [Vintage-Radio] Old police radio questions


> Harry,
>
> I was lazing on the couch in front of a fire this afternoon reading
the
> Third Edition (1938/1944) of "The Radio Manual" by Sterling.