[TenTec] TT Amplifier Connections 101

[Radio Adventures Co.]

In addition to what Carl said, the Corsair II (I don't know 
about the Corsair) had a "QSK" output that essentially was the 
'T' voltage buffered by an open collector transistor.   It was 
asserted low at key or PTT closure and went high 5 to 10 mS 
after opening the key or PTT.   RF appeared at the  output 
about 5 to 8 mS after key closure.  That is the same signal the 
Corsair used to switch all internal circuits.   NOTE, timing 
approximate.  I'm going by memory and that is dangerous!   :-)

Worked great with my Ameritron AL80A with PIN QSK 
switching.   I could run full break-in at any speed my keyer 
would run with perfect output waveform.  That is the rig could, 
I'm actually pretty slow.   :-)

73,

-Lee-



On 3 May 2005 at 9:43, John Pfeifer wrote:

> Could someone out there who has experience with the lineage of Ten Tec
> rigs give me an overview of the various methods used to key Ten Tec
> amplifiers as the rigs have evolved?
> 
> >From past reading of the group I know that sometime during the run of
> >the 
> Corsair II, they changed from KEY/KEYER OUT to TX EN/TX OUT setup they
> use today.  As I understand it, with the KEY/KEYER OUT method you
> keyed the amplifier first, which then keyed the rig.
> 
> How did the Omni A/D/B/C series handle amplifier keying?  I assume
> they had a different setup and seem to recall reading something about
> an amp keying relay...
> 
> I've read that a early-run Corsair can be modified to use the TX EN/TX
> OUT method.  
> 
> Can the Omni A/D/B/C also be modified in this fashion?
> 
> Thanks & 73,
> John Pfeifer - KL0WN
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> 
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