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[TenTec] Omni QSK with Alpha's 87A QSK

To: <tentec@contesting.com>
Subject: [TenTec] Omni QSK with Alpha's 87A QSK
Date: Sun, 20 Sep 1998 20:48:40 -0400
No shit..I did not mean that the plug did not fit...plug capatable means
that the signal levels are not right...DUH....
You are going to have to do some level conversions between the rigs.....
bitch to Alfa for not ,being PLUG CAPATABLE with the TT

>>The reason your TT is not plug capatable with the Alpha is the same reason
>>Nikon lenses will not fit a Minolta...it is called MARKETING....
>>and this  is not a bad thing, it is simply good business..
>Has nothing to do with physical plug type;  probably has to do with
>keying signals.  Both the Alpha and the Omni key on with a key
>closure to ground.  And a "virtual" key closure to ground is what
>the 87A puts out on its' "c" RCA socket to go back to the
>transceiver to signal it is ready to be driven.  All this occurs
>in well less than 20 msec or so.
>Would really wish someone would tell me what the Omni puts out
>from the  TX OUT terminal to the KEY IN terminal on the back of
>Ten Tec linears;  and then,  what comes out from the KEY OUT
>terminal of  their linears to be fed back into the TX EN terminal
>of the Omni's.  From what follows,  you will see why I believe
>it is exactly what the 87A wants to see;  that is sink to gnd on
>To quote the Ten Tec manual once again, "...the Logic board
>generates a transmit acknowledge voltage at connector 63.
>This signal [whatever it might be?] becomes the external
>keying loop that is normally jumpered on the rear panel.
>If an external [QSK capable] amplifier is to be used,  it
>can be included within the keying loop so that the amplifier
>can control the  [QSK] timing of the keying and prevent hot
>So,  as  the 87A requires a closure to gnd.  from such a
>keying loop, and provides the same back to the loop,
>i.e. a sink to ground,  isn't that exactly what the Ten Tec
>loop is doing when Q11 conducts on the Omni Control
>Board,  Fig. 4-18,  pg. 4-17 of the VI+ manual??  Or,
>perhaps it is the exact opposite in the Omni:  lifted
>from gnd.   as the transmit signal within the keying
>loop.  No way to know which way it is from the schematic,
>at least I don't see it.  But in reading the above  quoted
>text,  it would seem that Q11 conducts when the key
>acknowledge signal is present,  thus providing the
>"virtual" key closure to gnd.
>Anyway,  I am still not getting this set up to operate QSK.
>73,   Jim,  KH7M
>same back to
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