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Re: [TenTec] which power supply…station efficiency

To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Subject: Re: [TenTec] which power supply…station efficiency
From: "Bob McGraw - K4TAX" <RMcGraw@Blomand.net>
Reply-to: Discussion of Ten-Tec Equipment <tentec@contesting.com>
Date: Sat, 14 Dec 2013 07:46:49 -0600
List-post: <tentec@contesting.com">mailto:tentec@contesting.com>
All three transceivers at my station are connected direct to my Astron SS-30M. The DC power leads are less than 4 ft in length each, the leads being #12 stranded and fitted at the power supply with ring terminals which are both crimped and soldered to the wires.

I run a #10 stranded from each radio ground back to the power supply ground. For wire type, I've found some nice Red/Black zipcord that is #12 for the DC service and for the ground, I use #10 automotive primary wire that is white in color.

For the external equipment, i.e. illumination of the metering in the 238 Tuner unit and to power the AVG/PEP SWR & PWR meter are taken from the AUX +12V of the various radios.

Although I may have all three radios on at the same time, I've not found a need to transmit on more than one at a time. I basically adhere to the idea that every connection is suspect at some point in time and every connection does introduce some amount of resistance.

Bob, K4TAX

This is to inform all persons, I am a Tentec Ambassador and I receive
compensation according to the Tentec Ambassador program.  In addition, I
serve as a volunteer beta test person to Tentec for the Omni VII, Eagle
and Argonaut VI radios.  I hold no employment relationship, no financial
interests nor do I conduct any commercial business, direct or indirect,
with Tentec.

----- Original Message ----- From: "denton sprague" <denton@oregontrail.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Friday, December 13, 2013 10:40 AM
Subject: Re: [TenTec]which power supply…station efficiency

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.

On Dec 8, 2013, at 8:14 AM, denton sprague <denton@oregontrail.net> wrote:

I am upgrading a bit here…
got a new full sine wave ups coming with two aux battery packs to replace my old cyberpower 3000 ups.
Ups has AH rating of 336 and each aux battery pack is 864 AH….
I am also looking at replacing my Astron 35m power supplies with more efficient switching power supplies or running my TT Eagle or my Omni 7 and various sundries that use 12 vdc with a battery pack, charger and a battery booster when needed. So my question is…what switching power supplies are my fellow hams using and how well do you like them?
I am aiming for efficiency, rf quietness and flexibility.
Other than the station, the ups will be used to fire a smaller flat screen tv, satellite receiver, iMax and a lamp….nothing total over 500 watts draw…at least to my calculations.

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