[MRCA] Signal Corps Kellogg carbon Mics
Al Klase
ark at ar88.net
Sat Apr 19 12:09:36 EDT 2025
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
<https://www.skywaves.ar88.net/Docs/Signal%20Corps%20Radio%20Sets.pdf>.
(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 <ark at ar88.net> 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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>>
>> --
>> Al Klase - N3FRQ
>> Jersey City, NJ
>> http://www.skywaves.ar88.net/
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>
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--
ARK Sig Block Al Klase - N3FRQ
Jersey City, NJ
http://www.skywaves.ar88.net/
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