[GreenKeys] "Universal Release Magnet" for M14 TD

[Duncan Brown]

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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