[GreenKeys] 28 KSR SKINTIGHT AUCTION

[Nick England]

I knew I was gonna get into trouble.....
There are low-level (+/-6v) and tempest modification kits for the
TT-176 so perhaps they show up in both flavors -
MK-1082/UG   - LOW-LEVEL MOD KIT FOR TT-176
MK-837/UG   - RFI MOD KIT FOR TT-176

5815-00-088-6025 - 7.42 to 7.00 unit mod kit for TT-176, TT-176A

And manuals, just FYI
TT-176A/UG, 176B, 176C
NAVELEX 0967-LP-173-7010    (TTY BUL 311B Vol 1)
NAVELEX 0967-LP-173-7020    (TTY BUL 311B Vol 2)
NAVELEX 0967-LP-323-3100    (TTY BUL 295B)

So I guess it all depends on just what is under the cover of that rig
on eBay....
cheers,
Nick

On Wed, Jun 22, 2011 at 3:33 PM, Nick England <navy.radio at gmail.com> wrote:
> I feel extremely hesitant matching wits with W7TTY, but both the Navy
> TTY manuals and the TT-176 in my shack respectfully disagree. It is a
> pretty normal high-level current loop unit, non-Tempest, no armored
> cable, or mil connectors. It just is packaged to fit within a 19"
> rack.
> The LESU sits on the back of the mounting plate with a cover -
> underneath it looks like a regular ole Teletype Corp. LESU and
> connections are via the usual terminal strips.
> http://www.navy-radio.com/tty/tt176-02.jpg
>
> I listed the components for various TT-176 models in a previous e-mail
> to the list.
> BTW, I have no connection to the seller, just am a happy TT-176
> owner/operator who was amazed to see one languishing at $0.99 no-bid!
>
> cheers,
> Nick K4NYW
> www.navy-radio.com
>
>
>
> On Wed, Jun 22, 2011 at 2:57 PM, George B. Hutchison <w7tty at olypen.com> wrote:
>> I believe that the TT-176 is a Tempest Unit, with cheesy model 32
>> style keyboard, optical distributor in the left rear corner, and
>> half-amp selector magnet coils and the mu-metal shield over the
>> magnets.
>>
>> All wiring is in shielded/armored cable, and has three pin military
>> connectors. I think the Electrical Service Unit is referred to as a
>> "bustle".
>>
>> I believe the seller, "ipullgees" is possibly a former greenkeyer
>> who is either a fighter pilot or test pilot. This is good, as I
>> recall the man having some good taste in gear.
>>
>> Dealing with Tempest stuff is a different world. Those with ST-8000A
>> TUs are fortunate in that one of the output sigs from the ST-8000A
>> is Mil-188, which is what the tempest world is all about. It's kinda
>> like RS-232, except that the signal excursions are limited to plus
>> and minus 6 volts, and is inverted, I.E. Mark = Plus 6 volts, and
>> Space =  Minus 6 Volts. Works just fine with NPN keying transistors.
>>
>> W7TTY
>>
>