[GreenKeys] 28V MITE Myth or Real ?

[Olaf Möller]

Heating/Heater. Not all planes are fully air-conditioned.  ;-)

Have Fun !!!
Olaf  -  DL8OBH - AF0A

Am 24.04.2023 um 19:12 schrieb Nick England:
> Sources: NAVSHIPS 93434(A) and TM11-487A-3
>   - doesn't mean they actually exist beyond prototypes but there was
> indeed a DC motor and p/s nomenclature assigned.
>
> Option for the AN/TGC-14(V) MITE -
> DC Power Supply Kit, MK-540/UG (DC Motor PD-85U is p/o MK-540/UG, 26 vdc)
>
> MK-540/UG POWER SUPPLY KIT, DC
> To provide means of introducing primary DC power and signal
> information into EQUIP, signal line power, necessary power for
> converting neutral TTY signals into polar signals, and provides for
> low temperature operation. It also provides motive power for TTY by
> means of SER governed Motor, DC PD-85/U. Input power: 26 vdc. Output
> power: Dual range line sensor is 28 vdc at 100 ma plus 6.0 vac at 450
> ma; signal line power supply is 28 vdc at 100 ma. MK-540/UG is p/o TTY
> Set AN/TGC-14(V) and others. It is u/w, but not p/o TTY TT-297/UG.
> (USMC)
>
> The airborne version  -
> TT-264/AG says - AC power: 110/220v, 400 cps, 3 ph; DC power: 28v, 9.5 amps.
> (Alternate power requirements can be met depending on how EQUIP is. ordered.)
> (it is not clear to me that means either AC or DC - But if an AC motor
> why would you need 9.5A at 28vdc? The specs for the AC versions say
> 270W total)
> However -  MIL-T-22143 only says 110v, 400 cps, 1 ph.
>
> https://www.navy-radio.com/manuals/tty/tty-index-93434A.pdf
>
> See also
> https://www.google.com/books/edition/Electronic_Communication_Equipment/CqoAj6AxWxgC?hl=en&gbpv=1&dq=%22MK-540/UG%22&pg=PA599&printsec=frontcover
>
>
> Nick England K4NYW
> www.navy-radio.com
>
> On Mon, Apr 24, 2023 at 10:51 AM MilComm Guy <m38inmaine at gmail.com> wrote:
>> Thank you for the replies, so far it looks like an export only or prototype.
>>
>> Mark
>> K1HF
>>
>> On Mon, Apr 24, 2023 at 2:11 AM Mike McAuley <mmcauley at cox.net> wrote:
>>> I'm watching this thread with interest.
>>>
>>> I have had my MITE set up mobile in an ex-mil Pinzgauer but have had to power it thru a very noisy inverter.
>>>
>>> I'd be very interested to hear what you learn about powering it directly from 28vdc batteries
>>>
>>>
>>>
>>> Mike
>>>
>>>
>>> -------- Original message --------
>>> From: MilComm Guy <m38inmaine at gmail.com>
>>> Date: 4/20/23 11:20 PM (GMT-07:00)
>>> To: Greenkeys <GreenKeys at mailman.qth.net>
>>> Subject: [GreenKeys] 28V MITE Myth or Real ?
>>>
>>> I feel very lucky to have a working MITE and even more to have a 60cycle unit thanks to a GreenKeys lead.  My ultimate goal is to have it mated up to my PRC-47 and operating in the field, I still need to find the CV-2455 converter to complete the project, I'm currently running it from the GRC-106/MD-522 combination.
>>>
>>>    I have read(not official) on two occasions that there is a 28V version of the MITE, the manual states availability of two AC motors 60 or 400 cycle, it makes no mention of a DC version, the manual is dated 4/1966.
>>>
>>> I would like to ask if any one has actual hands on experience or documentation or pictures of a 28V MITE.  I also would like to thank all of you for making this list a great resource for all things Green Keys.
>>>
>>> 73
>>> Mark
>>> K1HF
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