I agree with Richards: I have an RS-35A for each of my Orions. I can run
them SO2R. the wiring is direct to each radio from the power supply with #10
wire (red/black). the SO2R box from Yankee Clipper runs off one RS-35A. I
found that a RS-20 was NOT enuf for the Orion to operate consistently. The
SO2R+ box from Yankee Clipper pulls very little power so it makes no
difference I can see. it also has a power cable direct from RS-35A to SO2R
box of #14 wire.
jack
ak7o
-----Original Message-----
From: Richards
Sent: Friday, December 13, 2013 5:54 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] which power supply…station efficiency
Er... um... on the advice of Gary and Paul at TenTec, and from the
Brand-X Service Dept, I eliminated the power distribution panel, and
shortened all my power supply leads, and connect them directly to the
terminals on my RS-35M power supply. I upgraded all transceiver power
leads to minimum 12 gauge wire, as short as possible. My Brand-X radio
is kinda sensitive to any significant voltage or current sag when
running full blast, so I give it the best chance possible. Various
sources indicate nominal 12 v PAs are typically sensitive to such sags.
There is no need to have a separate power supply for each rig, if you
pay attention and run them all at once. Consequently, I employ one
RS-35M dedicated solely to powering one transceiver at a ztime, and
another RS-35M to powering various accessories. I cannot quantify it
with meter measurements, but I believe it all runs better that way.
I also have ferrite beads on the power leads, but I am with you - I
cannot say they are doing anything in particular, but remain in place
just in case.
I believe (ideally) every extra patch cable, connector, etc., in line
causes an ever so slight impedance and voltage or current or whatever
"speed-bump," so I have become a "Minimalist" and have tried to
eliminate as many such speed-bumps as possible.
Oh, sure, I know neither the contact operator nor I will notice a mere
.25 dB drop in signal strength, but it is the principle of the thing. I
also believe it is cumulative - as in the famous quote by Sen Dirkson,
possibly made in a different context...: "A dB here, a dB there; pretty
soon it adds up to real power loss." Er... um... I think it is how it
goes.
So, if I were looking to maximize station efficiency, I would eliminate
the power distribution strip. That was the absolute very first thing
Master Technician Paul C asked when my Jupiter acted funny. It is also
the first question I received from the Brand-X Service Dept, on a
related question, but regarding a different rig.
That is just MY take, of course... you mileage may vary.
========================= K8JHR ==============================
On 12/13/2013 11:40 AM, denton sprague wrote:
Ok..got some nice replays on all of this..
Currently have one of my Astron 35M's feeding either the Omni 7 or the
Eagle from a power strip….this should do until I have done more research
on a more efficient power supply situation.
I would prefer to have separate power supplies for each of the hf rigs
just to get some isolation between them rf wise….has this been a problem
with anyone else?
Have been using clamp on ferrite chokes on the dc line from the strip to
the rigs but can't tell if they are really doing anything.
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