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[TenTec] Argo Speech Processor Question (was Argo V distortion)

To: <tentec@contesting.com>
Subject: [TenTec] Argo Speech Processor Question (was Argo V distortion)
From: ken.d.brown@verizon.net (Ken Brown)
Date: Sun Aug 10 21:47:38 2003
>On the ground, I have to agree. At my other QTH I had a very good ground 
>system (8 foot ground rod 6 feet of #8 wire)& had more problems getting into 
>the phones, cable TV, & I can't count the times that during a storm I would 
>have lighting come in on the coax to the tuner which was grounded.
There are different kinds of ground systems for different purposes. For 
the purpose of keeping RF potential at the rig low, a good way to go is 
to have a quarter wavelength piece of wire connected to to ground 
terminal at the back of the radio, with the other end not connected to 
anything. The wire should be stretched straight as much as possible, 
though if it has to go around a few corners that is no problem. I 
suggest one or more of these wires for each band. Since you are only 
having what may be an RF problem on a couple of bands, you might want to 
try just a couple of wires for these bands. You can use 234/f (f in MHz) 
to calculate the length (in feet) of the wires. It would be safest to 
have the open ends of the wire either made into loops, or soldered to 
rings of some larger diameter wire, to reduce the possibility of corona 
discharge. Just don't have sharp pointy ends of these wires in the 
drapes or under the carpet.

I used a system like this when I lived in a second floor apartment. I 
had "Eye" lugs on each wire, and stacked them up on the grounding stud 
on the back of my TS-440 until no more would fit. I used 14 AWG stranded 
copper insulated (THHN or THWN I guess). I just laid the wires on the 
floor, along the baseboards. I didn't bother with anti corona measures, 
and running at 100 watts I didn't catch the building on fire even once. 
Without this system I had RF feedback on some bands, and got RF burns 
sometimes when touching the autotune button. After I put this ground 
system in, all of those problems went away. This kind of system will not 
protect you from equipment faults that cause a hot chassis, nor will it 
protect from lightning.



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