[GreenKeys] "Universal Release Magnet" for M14 TD

[Duncan Brown]

I found another copy of Specification S-5104.  This one is Issue 4; 
April, 1950.

It specifically states:"...permits operation on either A.C. or D.C. 
current..."

Copy enclosed (Nick - use this file for your archives)

73,

Duncan
K2OEQ


On 22-Jun-23 11:18, Duncan Brown wrote:
> Yes, "Universal" was probably for AC/DC operation.  The kit replaces 
> the magnet coil and replaces a 500 ohm resistor with a tapped, 175-350 
> ohm resistor.  The 350 ohm section is jumpered out for 110VAC operation.
>
> Fig 31 of TM 1-2222 (May 1951) that Harold referenced shows the tapped 
> resistor (with the same part no. that is in the modification kit).   
> So this kit must have been for pre 1951 units.
>
> The only confusion factor is that the spec refers to a "Release 
> Magnet" and TM 11 -2222 refers to a "Tape-Stop Magnet."
>
> The specification is dated Oct 1945. A copy of the spec is enclosed, 
> but it is not a very good scan.  I'll try to find a better copy to 
> scan for Nick's archive.
>
> Thanks & have fun,
>
> Duncan
> K2OEQ
>
>
>
>
> On 21-Jun-23 09:56, John, W9DDD wrote:
>> I was thinking that  "universal" referred to the fact that it could 
>> be used with AC or DC.  The armature being chrome plated on one 
>> side.  So you removed and turned it over before replacing it to 
>> select AC or DC.  The resistor has a tap on it, but I don't recall if 
>> you also change that, seems that would be the logical reason for 
>> having the tap.
>>
>> ---
>> ----
>> You said "tomorrow" yesterday.
>>
>> The above comments or recommendations are SWAG. Use at your own risk.
>> John, W9DDD
>>
>> On 6/20/2023 10:20 PM, Harold Hallikainen via GreenKeys wrote:
>>> I wonder if that's the tape stop magnet shown at
>>> https://www.navy-radio.com/manuals/tty/m14-tm11-2222-5105.pdf#page=65 .
>>> There is a resistor in series with it.
>>>
>>> Harold
>>> https://w6iwi.org
>>>
>>> On Tue, June 20, 2023 7:23 pm, Duncan Brown wrote:
>>>> At the Museum today, I came across some "Universal Release Magnet 
>>>> Kits,
>>>> #87390" for use on M14 TDs.  It consists of a solenoid, a 
>>>> resistor, and
>>>> some miscellaneous mechanical parts.  Paperwork is "SpecificationÂ
>>>> S-5104", which I do not find on Nick's site (I'll send him a scan.)
>>>>
>>>> Anyone know what this kit did or was for? /
>>>>
>>>> /Anyone want/need one?
>>>>
>>>> Have fun,
>>>>
>>>> Duncan
>>>> K2OEQ
>>>> /
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>>
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>>
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