[GreenKeys] TT/L-2 converter

[Stan Wilson]

  IF you take the time to set your TT/L-2 up correctly it will  copy signals
you can not hear in the speaker, fading signals, etc.  It is the ultimate in
TUs.   The only thing i would recommend as an add on is a UART some day as a
regenerator.   The filters are super.   There are different versions
mechanically.   A few have a PCB most are hard wired.   Joe is correct never
never never scrap one.  they are still state of the art hardware even if
hollow state.    They shine on 80 meters when everything else dies.     Once
you understand the design you will know a lot about wireless TTY, there are
three different types of filters in one of them.   All serve a different
purpose.   There big and heavy but so is that machine you are driving.  :)
 
Stan AK0B
 

-----Original Message-----
From: greenkeys-bounces at mailman.qth.net
[mailto:greenkeys-bounces at mailman.qth.net] On Behalf Of amourdutigre
Sent: Thursday, February 12, 2009 10:31 PM
To: greenkeys at mailman.qth.net
Subject: Re: [GreenKeys] TT/L-2 converter


All - - -
>
> That TU is the W6FFC TTL/2. There are parts in it that are rarer than
> chicken teeth.
>


Is there documentation on that TU anywhere?  (i.e., schematics, plans, etc.)

73
Kevin

 
KB0TXC Posted:
 
Please don't scrap out a TT/L-2! Some of those parts are absolutely
impossible to find anymore. From everything that I have heard, they are the
best hollowstate TU ever made. I have one right now that in a few weeks will
be cleaned, re-capped and put back into use.
 
I wanted to build one my self, until I realized that there simply are no
more 80 Henry chokes left in the known universe. Some of the interstage
transformers are also getting very hard to find, and near equals are very
expensive. Heck, even the torroids are getting very difficult to find.
 
If you want some documentation, go to Amazon and look for an old ARRL book
titled Specialized Communications Techniques, published in 1975. It is ARRL
publication # 6. It has the complete schematic and is quite helpful in
understanding how the unit works.
 
It is just my opinion, probably worth what I charge for it, but to me, to
scrap a decent TT/L-2 would be like scrapping a rare TTY or radio.
 
Best and 73
 
Joe KB0TXC
 
 
 

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