I seem to recall that a diode in the Titan III needs to be removed. Check
out the Tentec/WiKi site for the mod.
73
Bob, K4TAX
----- Original Message -----
From: "David Mays" <dmays42@frontiernet.net>
To: <tentec@contesting.com>
Sent: Friday, March 14, 2008 7:02 PM
Subject: [TenTec] Intermittent keying problem
>I am using an Orion II powered by an Astron 35M PS, a Titan III model 417A
> and a TT 238B antenna tuner. I can tune the O2 to any band and it keys
> and
> works on either CW or SSB barefoot with no problem. When I turn the T3
> from
> standby to operate in the QSK mode, sometimes the O2 will not key. This
> is
> an intermittent problem I have been chasing for several weeks. There are
> times the pair will work together flawlessly.
>
>
>
> The keying loop in the O2 menu is turned on. I have switched between
> loops
> #1 and #2, moving and checking the cables for correct connections on each
> end when I switch.
>
> The cables are original from TT and a continuity check shows them to be
> good. I have also swapped these cables out trying another pair.
>
>
>
> Two folks suggested I had a ground problem. All equipment was tied to a
> common ground except for the Astron. I connected the minus lead of the PS
> to the ground buss and for a while everything worked. Then the
> intermittent
> came back.
>
>
>
> Next I made up a new braided ground buss. It runs from the minus terminal
> of the PS, to the antenna tuner, on to the T3, O2 and is soldered to a #6
> copper wire hooked to 3-8ft ground rods. The total length of the ground
> bus
> system is <10 feet to the 1st ground rod.
>
>
>
> I have done a master reset on the O2 three times. Sometimes this seems to
> solve my intermittent ... until I really want the amp on.
>
>
>
> I am open to any suggestions on or off the reflector.
>
>
>
> Dave W8UI in WV
>
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