[TenTec] Scout RFI Issue

[Tom North]

Along with the suggestions that have been presented, it sticks in my mind (I
sold my Scout abt a year ago) that you may want to also check voltage that
the PS is set putting out, and also that it is capable of providing the ~10A
or there abouts that is necessary to power the rig.
GL es 73'
Tom  N5OZQ

----- Original Message -----
From: "Shawn Upton" <kb1ckt@yahoo.com>
To: <tentec@mailman.qth.net>
Cc: <supton@allegromicro.com>
Sent: Thursday, March 20, 2003 9:49 AM
Subject: [TenTec] RFI Issue


> I set up my radio over this last weekend, but I seem
> to have an RFI issue.  I have a 40m dipole squeezed
> into a 30' run (zig-zag setup), with about 10' of 300
> ohm twinlead to an MFJ-969 tuner, to my Scout.  The
> Scout is powered by some off-brand switching power
> supply, which seemed quiet enough.  No grounding is
> used.
>
> The issue: My SSB audio comes through the Scout
> speaker with some distortion.  And on 20m, if I just
> push the PTT, the radio will "howl".  I'm not too
> surprised that 20m has issues--but the issue appeared
> on 80m, 40m, 20m, and 15m.
>
> The Scout is left running at 50W, and when I tune the
> tuner, I am acheiving 1.5:1 SWR or so.  I tried
> swapping coax (from tuner to radio) with no change.  I
> don't have snap on ferrites, but I tried wrapping 20
> turns of the power cord around a metal screwdriver,
> and had no change.  This RFI does not seem to be band
> dependant.
>
> I tried out my FT-817 on the setup, and had no issues
> (with the radio setup).  But that is only transmitting
> at 5W, not 50W.
>
> I'll try tonight changing power supplies to a linear
> that I have, and to see if the feedback exists when
> transmitting into a dummy load.  Any suggestions?
> Thanks.
>
> KB1CKT
> Shawn Upton