[ARC5] Product detectors - the name.

[Glen Zook]

If Osterman's book shows the 75A-4 was introduced in 1958, then he was drinking something, pretty strong, when he wrote that!


The 75A-4 was introduced in October of 1954 along with the 30L-1 transmitter.  However, the name of the 30L-1 transmitter was very soon changed to KWS-1.  A 4-page color advertisement, that includes the 30L-1 transmitter, appears in the 1955 ARRL Radio Amateur's Handbook which was printed late in 1954.  The 75S-1 / 75S-2 receivers were introduced late in 1957.

 Glen, K9STH 
Website: http://k9sth.net

      From: Dennis Monticelli <dennis.monticelli at gmail.com>
 To: Kenneth G. Gordon <kgordon2006 at frontier.com> 
Cc: ARC-5 Maillist <Arc5 at mailman.qth.net>
 Sent: Thursday, May 11, 2017 5:53 PM
 Subject: Re: [ARC5] Product detectors - the name.
   
According to Osterman's book, the 75A-4 was introduced in 1958 and the NC-109 was introduced in 1957.

   
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