[GreenKeys] MD-522/GRC modem

[tony.podrasky]

They were solid-state but didn't have any fancy stuff in them.
All the regular discrete components - but the coils were little
black cylinders about the size of 6 nickels stacked up.

As I recall (remember: this is FIFTY YEARS AGO) the plug in
modules consisted of:

Loop supply
Transmitter
Receiver
850Hz shift
85Hz shift
power supply

UE,
K2EAA - TONY
NNNN
ZCZC

On 06/17/2020 02:40 PM, Steve wrote:
> Ugh. I've done the same thing myself. Sure could use real manuals.
> They can be downloaded but are a PITA to use that way.
> There are at least 8 manuals that cover the tranceiver alone.
> Steve
> ----- Original Message ----- From: "tony.podrasky"
> <tony.podrasky at gmail.com>
> To: "Steve" <zarco at sonic.net>; <greenkeys at mailman.qth.net>
> Sent: Wednesday, June 17, 2020 1:53 PM
> Subject: Re: [GreenKeys] MD-522/GRC modem
>
>
>> Back in New York, in the '70's I worked at a company
>> that built MD-522/GRCs. After carrying around the manuals
>> with all the trouble shooting stuff - for 30 years, I
>> finally threw them out.
>>
>> They stacked 3 high as I recall: the MODEM, the TRANSCEIVER, and
>> the MATCHBOX or something or other.
>>
>> UE,
>> K2EAA - TONY
>> NNNN
>> ZCZC
>>
>>
>> On 06/17/2020 12:48 PM, Steve wrote:
>>> *Subject:* MD-522/GRC modem
>>>
>>> Have just gotten my GRC-106A on the air and am wondering if the
>>> companion MD-522
>>> is worth looking for. From the manual, it is capable of 850 Hz and 85 Hz
>>> shift.
>>> Transmit and receive. How difficult would it be to change the 85 Hz
>>> shift to 170 Hz which would make it far more useful?
>>> Any info or tips appreciated!
>>> Steve W6SSP
>>>
>>>
>>> ______________________________________________________________
>>> GreenKeys mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:GreenKeys at mailman.qth.net
>>>
>>>>>> Jordan Spencer Cunningham's GreenKeys Search Tool:
>>>>>> https://teletype.net/gksearch
>>>>>> 2002-to-present greenkeys archive:
>>>>>> http://mailman.qth.net/pipermail/greenkeys/
>>>>>> 1998-to-2001 greenkeys archive:
>>>>>> http://mailman.qth.net/archive/greenkeys/greenkeys.html
>>>>>> Randy Guttery's 2001-to-2009 GreenKeys Search Tool:
>>>>>> http://comcents.com/tty/greenkeyssearch.html
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to tony.podrasky at gmail.com
>>>
>>
>> --
>> MicroSoft error messages written in Haiku:
>>
>>         Three things are certain:
>>         Death, taxes and lost data.
>>         Guess which has occurred?
>>
>>
>>
>> --
>> Internal Virus Database is out-of-date.
>> Checked by AVG Free Edition.
>> Version: 7.1.385 / Virus Database: 268.4.1/312 - Release Date: 4/14/2006
>>
>>
>
>

-- 
MicroSoft error messages written in Haiku:

         Three things are certain:
         Death, taxes and lost data.
         Guess which has occurred?