[MRCA] The Radio Sets Were Humming...

WA5CAB at cs.com WA5CAB at cs.com
Thu Oct 5 01:22:16 EDT 2017


No, no aircraft radio receiver of that period nor most of them (except for 
the Army's low-band VHF sets after about 1960) had any squelch circuit.  
They were all MF and/or HF AM/CW sets.  The "humming" referred to was obviously 
the receiver dynamotor(s).  Which in the 8th and 9th AF of the period would 
have only been in the BC-224, BC-348 or SCR-274-N receivers.

In a message dated 10/04/2017 11:19:19 AM Central Daylight Time, 
mrca at mailman.qth.net writes: 
> The "humming" could have been a vibrator power supply, but it was more 
> likely caused by squelch not being fully adjusted on the radio to silence the 
> white noise, or static, coming through the radio.
>  
> 
> Mark
> 
> WW2RDO
>  
> 
> 
> 
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480
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