Folks,

I find the SCR-288 story facilitating.  War clouds were gathering, and SCR-284 development was behind schedule.  The Signal Corps became aware that RCA was selling field radios to the Swedes under there "master index" number MI-8751.  These were procured as SCR-288.  Later SCR-288's employed a modified TX-RX, BC-474, that had a one-piece front panel and dropped the RCA "meatball" emblems.

Here a pic of a very early MI-8751 at the Signal Corps Labs in 1940:


The later MI-8751's had modifications like a second phone jack, and a connection for a battery for the receiver. See below.
Picture from HERE. (rare document)

On 4/19/2025 11:25 AM, Doran Platt via MRCA wrote:
Al,
That is exactly the RCA unit that I believe was mentioned to me.  Now I know...  Thanks for the good info.
Jeep K3HVG
On 04/19/2025 10:27 AM EDT Al Klase <[email protected]> wrote:
 
 
Jeep,

My understanding is that those mics were originally supplied with RCA home-disk-recording units in the 1930s.
That was the mic originally used with the SCR-288/BC-474 an RCA design.

Here's K4CHE's setup at the Gilbert meet a while back.





And, here's my earlier MI-8751 "Swedish Set"





I have a mic.  I think this is the only place they were used by the Army.

73,
AL


On 4/19/2025 8:32 AM, Doran Platt via MRCA wrote:
I have two of the Kellogg carbon mics in excellent condition; cords and elements. I am told they pre-date the T-17. Someone suggested they were used with Jefferson-Travis and RCA equipment?  If anyone is interested in them, I am open for offers.  Thanks.
Jeep K3HVG

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