[TMC] SBT-1KV lives!

[Duncan M. Brown]

> [Original Message]
> From: Tony Faiola <faiola at ieee.org>
> To: <garyschafer at comcast.net>
> Cc: <duncanancy at earthlink.net>; <tmc at mailman.qth.net>
> Date: 04-Feb-09 16:42:16
> Subject: Re: [TMC] SBT-1KV lives!
>
> Thanks Gary:
>
> You took the words right out of my fingers.  One other note is that  
> we designed an overload circuit for the grid, screen, and plate.   
> Some of my ex Navy buddies were worse than hams in burning up  
> transmitters!  Therefore, you might want to check the pot (check  
> manual) for the screen overload adjust.  At TMC engineering dept, we  
> picked the PL-172 (8295) tube because it was more robust than the  
> 4CX1000.  You could draw a mil with the PL-172, but good bye to the  
> 4CX1000.  A logical modification to your amp would be to replace the  
> 172 with a 4CX1500 (if you can't get any replacement PL-172s).  I  
> have coached a few hams on the process, and the 4CX1500 works like a  
> charm with the existing circuitry.
>

Tony, thanks for your comments.  Our tests yesterday were just to see if
the unit would put out power. Now we will go back and follow the Alignment
Procedures and Performance checks to make sure everything is as it should
be.

>
> To my knowledge, Tele Signal was never part of TMC.  They did  
> manufacture a host of VFTG products nearby Mamaroneck, similar to the  
> Panoramic SB-12 Analyzer, Mt. Vernon, NY.
>

I was just wondering if there was some connection between TMC and
Tele-Signal.  It seems strange that New York State would have bought six of
these stations from TMC set up for RTTY operation, but with another
manufacturer's RTTY converters.  Also strange that there are two AFSK
modulators (TIS-3 & T-S 101A) and only one AFSK/FSK demodulator (T-S 102A).

> Have fun.
>
> Ciao, Tony, K3WX (ex W2GBS)
>

Thanks & 73,

Duncan, K2OE