[ARC5] 70.7V Line Transformer for audio matching

[Robert Downs]

The LS-3 was also organic to a number of WW-II vintage sets including SCR-188, 193. 499 and 506.  

 

It was actually organic to the AN/GRC-26D as well except that by then it and the LS-9 were called the LS-215/U and 600 and 4000 ohm taps had been added to the matching transformer.  :-)

 

Robert Downs

 

From: arc5-bounces at mailman.qth.net [mailto:arc5-bounces at mailman.qth.net] On Behalf Of jeepp
Sent: Tuesday, January 8, 2019 05:17
To: Meir Ben-Dror WF2U; Roy Morgan; ARC5
Subject: Re: [ARC5] 70.7V Line Transformer for audio matching

 

Meir is, of course, absolutely correct.  The LS-3 is organic to the SCR-288/388 and the AN/GRC-26( ) except the D.  That said, in a low-noise environment such as a radio shack or ops area the LS-3 does a creditable job.  In war movies in the 40's and 50's, one can often see the BC-348 and the LS-3 speaker.  In 12 O'clock High there's a scene in a operation center with the above.  In Impact and QST magazine, the LS-3 can be see in pictures of AAF radio shops along with a BC-348.  So, pretty clear how the two were associated over time.  But, the fact remains, there are no "matching" speaker, per se.  Last fall at a hamfest I bought a very nice '348-R and LS-3 for $100.  The gentleman's signage indicated "BC-348 and matching speaker".   Whatever works..... no worries.

Jeep K3HVG

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