[GreenKeys] 28V MITE Myth or Real ?

Fri Apr 21 12:28:06 EDT 2023

W7TTY ITTY news-terminal with (my) mighty 400Hz MITE

https://www.youtube.com/watch?v=MRAT6ZITwhs

At that time I was still using a programmable standard inverter with no 
output filter but a powerful EMI (RFI) noise floor !!!
And that on a shortwave field day :-(
But it was easy to change the (RX)  line speed with the inverter. :-)

Have Fun !!!
Olaf

Am 21.04.2023 um 16:13 schrieb Olaf Möller:
>
>
> What kind of motor is the DC 28 Volt variant in a MITE ??? I've got 
> one of this DC MITEs and two AC 115 Volts / 400Hz machines...
>
> Olaf  -  DL8OBH - AF0A
>
>
>
> Am 21.04.2023 um 14:27 schrieb Bruce Gentry via GreenKeys:
>>
>> The outer part of the rotor in a Mite motor is hard steel. The motor 
>> is capacitor start and run two pole, and is wound to bring everything 
>> close to saturation. It starts as an induction motor, and as it 
>> approaches synchronism the rotor becomes magnetized and locks in to 
>> synchronous speed. Motors of this design run hot and are of poor 
>> efficiency.
>>
>>     Bruce Gentry, KA2IVY
>>
>> On 4/21/23 7:47, Olaf Möller wrote:
>>>
>>> I suspect the synchronous motors of the AC-variants MITEs have 
>>> rotors with a combination of permanent magnet excitation and a 
>>> self-exciting ferrite ring to minimize the risk of "tipping".
>>>
>>> Olaf  -  DL8OBH - AF0A
>>>
>>>
>>>
>>> Am 21.04.2023 um 11:26 schrieb Henning Treumann via GreenKeys:
>>>> I have to correct. The prototype version is 115V BUT 50 Hz.
>>>>
>>>> Henning DF3OE
>>>>
>>>> Am Fr., 21. Apr. 2023 um 11:16 Uhr schrieb Henning Treumann
>>>> <df3oe.henning at googlemail.com>:
>>>>> I have got MITEs in all versions in my collection.
>>>>>
>>>>> 115V 400HZ, 28V DC and also a prototype version 220V AC 50Hz intended
>>>>> to sell to German Army (Bundeswehr),
>>>>> but it never came to a contract.
>>>>>
>>>>> 73
>>>>> Henning DF3OE
>>>>> www.teleprinter.net
>>>>> www.i-telex.net
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> Am Fr., 21. Apr. 2023 um 08:20 Uhr schrieb MilComm Guy 
>>>>> <m38inmaine at gmail.com>:
>>>>>> 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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>>>
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>>>>> 2002-to-present greenkeys archive:http://mailman.qth.net/pipermail/greenkeys/
>>>>> 1998-to-2001 greenkeys archive:http://mailman.qth.net/archive/greenkeys/greenkeys.html
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>
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