[GreenKeys] Trying again

[David Wade]

On 25/09/2026 01:12, Keith Wood via GreenKeys wrote:
> It's been two weeks since my post asking for help.  I did get a good 
> response, but not actual answers to my questions, so I'm going to try 
> again:
>
Probably because there are no simple answers, just if this, then that,,,
>
> I have a TG-7-B TTY.
>
> I have a TG-26-A Reperforator (without the cover).
>
> I have a TG-26-B Reperforator (apparently complete).
>
> I have a Rectifier RA-87.
>
> I have a Flesher TU-170 RTTY Terminal Unit.
>
> I have the manuals for the above, except the TG-26-B.
>
> I THINK I have the cables for the above.  All but the TU are in chests,
> and apparently came from Army MARS.  I got the TU from Fleabay. 

You probably need different cables for the TU-170.

> What I need is some advice and guidance for getting this stuff up and
> working.  I want to use it with a Yaesu FTDX5000, so will build the
> appropriate cable.
>

You need to check out the TTY out before you use it.
They will probably need cleaning and adjustment. If they have not been 
used for some time this can be a lot of work.
If they are "new old stock" so never used this will be a lot of work.
I would start by checking it works locally, so what you type is received 
for which you need the TU-170, then use the TU-170 to decode known good 
tones from either internet teletype via ITTY or usig the MMTTY program.

https://rtty.com/itty/index.htm

https://hamsoft.ca/pages/mmtty.php

> 1) To just get the RTTY up, do I need anything other than the TTY, TU
> and cables to/from TTY, TU and radio?
>

Never done a Teletype TTY only Creed which are slightly different but I 
can´t see what else you would need.
Normally if being used over hard wired circuits rather than RTTY you use 
the RA-17 to provide the power to operate the selector magnets in the TTYs,
In this case its not needed as the  TU-170 has a built-in loop supply.
> 2) I believe that the TTY is 115VAC, and the selector switch just sets
> cycles.  So I can plug in and go? Does anyone know the amps this uses?
> I'm not finding that in the manual.
>
According to the manual it will run from DC or various AC frequencies so 
if the switches are correctly set it can be run from normal mains.
looks like its 90 watts so under 1amp but starting current will be more.

> 3) I'm seeing conflicting (or at least conFUSing) info regarding power
> for the Reperforators.  The manual says that "governed series motors"
> run on either 105-125VAC or 105-125VDC.  Then it says that the "jack
> box" needs 105-115VDC.  I THINK that means that I need to plug the
> Rectifier into 105-125VAC, then the Reperforator to the Rectifier.  Or
> do I even need the jack box?  I see that it connects to line units,
> which I don't have and apparently don't need.

So you have two types of power. Motor Supply that runs the motors and a 
Loop Supply which operates the receive magnets in the TTYs.
So provided the switches are set correctly you can simply run the motors 
from normal US mains.

The loop supply needs to be DC and in normal use the RA-87 to generate 
this supply, but if you are using the TU-170 that has a built in loop 
supply so you don't need the RA-87.
Is the jack box separate or a part of some other item. I don´t see it 
mentioned above.

>
> 4) The manual I have only covers the TG-26-A.  Is there anything
> different about the TG-26-B that I need to know about?
>
Don´t know,
> Thanks,
> Keith KA7EKW
>
>
Dave
G4UGM