[Collins] MM-280 and MM-281

[Dr. Gerald N. Johnson]

I found pictures of both at: http://radioleo.tripod.com/leo/id28.html
sure looks like a Turner desk mike, maybe a +3. And the CPN shown on the 
MM-281 is 020-0260-020. But its not in my old Turner catalog, I'll have 
to go look in an vintage Allied or Newark again.

On line, look at the Turner +3 and compare that to the SM-281 without 
the two controls on the deck. Same part looks to me like or the Turner 
case with a different cartridge.

So if the desk mikes were specials made by Turner, the mobile mike one 
digit away for its CPN might also be a Turner. A Turner history page 
link claims Turner made many microphones for Collins, which I'm sure 
they did.

Digging still, looks most like a Turner 750 series: 
http://www.ericbraun.com/turner/turner_images/Turner%201972%20Catalog%20Pages/Turner%201972%20-%2012.jpg 
without the locking switch. I don't find any hand mikes in that 1972 
catalog that match the MM-281 though. And that's the right time frame 
for the KWM-380.

73, Jerry, K0CQ, technical adviser to the Collins Radio Association.

On 12/20/2010 3:20 PM, Alan Chandler wrote:
> Hi Jerry,
>
> This is the desk mic, SM-281 not the hand held.  The Collins PN is
> 020-0261-020
>
> 73, Alan
>
> -----Original Message-----
> From: Dr. Gerald N. Johnson [mailto:geraldj at weather.net]
> Sent: Monday, December 20, 2010 12:34 PM
> To: Alan Chandler
> Subject: Re: [Collins] MM-280 and MM-281
>
> Did have a part number anywhere? Collins fabs would have begun with
> 5nn-, purchased parts with some other number, likely 020- as seen on one
> of the MM-280 pictures on line.
>
> 73, Jerry, K0CQ, Technical Adviser to the Collins Radio Association.
>
> On 12/20/2010 12:58 PM, Alan Chandler wrote:
>> Hello Jerry,
>>
>> The SM281 has a metal case, not plastic.  I pulled the bottom cover off -
>> there is no indication of manufacturer.  Mine is a Rockwell - Collins.
>>
>> 73, Alan - K6RFK
>>
>>
>
>
>