[GreenKeys] 35-KSR - 50Hz gears

[Ralph Mowery]

I am thinking all the 100 lb supply in the M-19 did was supply about 100 
volts for the punch ,and maybe a loop, but not sure about the loop.

I have the  M-19 with the big supply, but it was modified long before I got 
it.   The only time I turn the supply on is to punch the tape.
All the loop current comes from the ST-6.

----- Original Message ----- 
From: "Jim Haynes" <jhhaynes at earthlink.net>
To: <epvgk at limpoc.com>
Cc: "Green Keys" <greenkeys at mailman.qth.net>; "tony.podrasky" 
<tony.podrasky at gmail.com>
Sent: Sunday, December 07, 2014 8:46 AM
Subject: Re: [GreenKeys] 35-KSR - 50Hz gears


> On Sat, 6 Dec 2014, epvgk at limpoc.com wrote:
>
>> There's always the 130 pound block of iron that is the old style M19
>> power supply unit. hehehe.
>>
> Which doesn't do anything for a Model 35.  And most of those M19 power
> supplies use constant voltage transformers which are quite frequency
> sensitive.  In the military, where frequency accuracy cannot be assured,
> the M19 used thyratron rectifiers or magnetic amplifier regulation.
> 

---
This email has been checked for viruses by Avast antivirus software.
http://www.avast.com