[Milsurplus] Telegraph Distortion Analyzer

[WA5CAB at cs.com]

Jeff,

I think you will find, if you look at the nameplate again, that it is 
TDA-2.  AKA TS-917/GG or TS-1060/GG.  

Quoting from the Stelma instruction book, the TDA-2 can be jacked into the 
line and used to measure distortion in 20 or 60 mA neutral and 30 mA polar 
circuits running (depending upon the specific model you have) 60, 65, 66, 75 
and 100 wpm (the 65 may be a typo).  Types of distortion measured are:

Bias (spacing and marking)
Characteristic
Fortuitous
End (spacing and marking)
Peak
Mechanical

You can use it to detect and ID bad segments or cams/contacts in TD's and 
keyboards, adjust repeaters, check various machines, and etc.

I have several of them, a mix ot TDA-2's, TS-917's or TS-1060's, if anyone 
needs one.  Reprint of the TDA-2 manual $10.00 plus shipping.  I also have a 
NAVSHIPS and a TM 11 that I could scan if needed.

In a message dated 4/21/2010 8:58:22 PM Central Daylight Time, 
n2lxm at juno.com writes: 
> Good Evening All,
> 
>         I just got in from a Local Radio Club Chance Auction. I picked a
> few items, one of which is a TD-2 Telegraph distortion Analyzer.
> Manufactured by Stelma, Inc. of Stamford, Conn. dose anyone have any
> information on this little scope. I plan to donate it to a local
> Information Museum. The other large item was a URM-25/D Signal Generator,
> complete with all adapters and top cover. Not bad for $10.00 and it
> works.
> 

Robert & Susan Downs - Houston
wa5cab dot com (Web Store)
MVPA 9480