[MRCA] World War Two ATC tower radio

[Robert Downs]

No, the BC-638, 639 & 640 are parts of numerous SCR’s and a few RC’s.  If the system had something like an antenna switch or relay, it would be a part of the higher level system.  

 

Robert Downs

 

From: mrca-bounces at mailman.qth.net [mailto:mrca-bounces at mailman.qth.net] On Behalf Of J Mcvey via MRCA
Sent: Tuesday, July 10, 2018 17:27
To: mrca at mailman.qth.net; mkdorney at aol.com
Subject: Re: [MRCA] World War Two ATC tower radio

 

I was curious about this and located manuals for the receiver and transmitter, thinking that the antenna switch would be described in one or the other. It certainly isn't easy to find if it's there!

The transmitter has many components to it that will fill the rack top to bottom if it's complete. Quite the project!

 

Maybe these radios part of a larger all encompassing "radio system" nomenclature which would include  their use as a transceiver system?

 

On Tuesday, July 10, 2018, 12:28:58 PM EDT, WW2RDO via MRCA <mrca at mailman.qth.net> wrote: 

 

 

I'm trying to help out a museum purchase and restore a World War Two Control Tower radio.  We've whittled things down to a BC-639/BC-640 radio combination.  The objective is get a complete and functioning radio. We have the transmitter  ( BC-640 ) complete, in the rack ( Frame FM-39 ) and the Power Supply ( Rectifier RA-42 ).  We also have a receiver ( BC-639 ), but no frame FM-39, and no power supply RA-42 for it .  Modified equipment is not an option, since this is going into a museum.  We will also need an antenna switch external to the radios so that the radios will work as a transceiver.  There is a Junction Block, JB-45 that is an antenna switch, but we don't know if that antenna switch will work with the BC-639/ BC-640.  The BC-639/ BC-640 operate on 100 to 156 MHz AM.  At least part of that frequency range falls into the 2 meter Ham radio band.  Any help would certainly be appreciated.

 

73

Mark

WW2RDO

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