[FADCA] Re: Update 10/28/03

[bud thompson]

Deltona
Wednesday Oct 29 0700E

Eric-

The Kenwood and Alinco 8-pin microphones should be interchangeable - so =
all you need is one to be able to test all three radios for PO and VSWR =
on the feed line.  I believe all three of those radios have UP/DOWN =
frequency control via the microphone and all mic connector pins are used =
except for pin 6 which may be N/C or, if used, have fixed level, =
unsquelched RX audio.

If the Alinco has a data port in the rear, it likely has fixed level, =
unquenched audio to the TNC, which also means that TNC has a DCD board =
and will run with squelch full open and will not be affected by the =
volume control on the radio.  (Leave both full counter clockwise if that =
is the case.)

The stock Kenwood 3530A did not have RX audio available at the =
microphone connector.  That radio-to-TNC cable may have a wire/ mini- =
plug to plug the TNC into the speaker jack on the rear. If that is the =
case, the TNC on that radio will be affected by the volume control on =
the radio. If the TNC does not have a DCD board, the squelch cannot be =
left open.  If there is no separate speaker plug on the TNC to Radio =
cable, then the 3530A has been modified to provide RX audio at pin 6 of =
the microphone connector (As I've done several here.) Most such mods =
provide fixed-level unsquelched audio for the TNC and the TNC would need =
a DCD board.

The stock Kenwood 431 should have RX audio at pin 6 of the mic =
connector... so if there is no wire/ mini plug on that radio to tnc =
cable, that TNC will also run with open squelch.

By the way - I think Clayton indicated at one time there was a fourth =
Tiny-II TNC as a spare. =20

Good show!

Let me know if you will need Charlie and me to come help on Sunday.

73,
bud Thompson N0IA
386 574 4124


  ----- Original Message -----=20
  From: kptower@bellsouth.net=20
  To: Andy Leeds ; Bill Sinbine ; bud thompson ; Charlie Crook ; Don =
Winn ; George Fundis ; Ken Johnson ; Kenneth Hendrickson ; Mailman ; =
Rick Muething=20
  Sent: Tuesday, October 28, 2003 20:32
  Subject: Update 10/28/03


  Evening again guys;

  I was able to get up to Trinity Towers this evening and got quite a =
lot done.

  The 220 yagi is installed and 9913 is run from the antenna down inside =
the equipment room.   Still need to put a connector on at the equipment =
end.

  Ran 1/2" hard-line from both UHF yagis down into the equipment room =
and still need to put a connector on each one at the equipment end.

  Also ran 1/2" hard-line from the dual band Comet vertical antenna down =
into the equipment room and still need to put a connector on it at the =
equipment end.

  I spent some time trying to come up with a good grounding point but =
did not come up with anything real sound yet.   That might be a project =
for Saturday afternoon or Sunday.

  I also got the manufacture and model numbers of the radios in the =
cabinet.

  The VHF radio is an Alinco DR-135.   It appeared to be wired to the =
TNC through jacks at the rear of the radio.

  The 220 radio is a Kenwood TM-3530A.   It is wired to the TNC through =
the mic connector.

  The UHF radio is a Kenwood TM-431A.   It is also wired to the TNC =
through the mic connector.

  All three TNCs are PacComm Tiny-2s.   The TNCs for the 220 & UHF =
radios both had an additional part to the model number that I did not =
get.   I think that they may be a newer model.   All three looked the =
same from the front panel.

  I will try to get back up there again tomorrow evening and get the =
connectors on the lower ends of the feed-lines and possibly try to start =
waking up the radios.

  Till tomorrow 73's
  Eric KD4DJW




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