During my last jaunt on HF (before selling station to focus on my kids), I ran
my Paragon this way, but with a homemade charger I came up with at the time. I
wish I hadn't gotten rid of the charger. It was a design someone had at the
time and I improved upon it. My power plant was very quiet.
Eric
W9WLW
Sent from my iPad
> On Dec 8, 2013, at 2:31 PM, Jim Brown <k9yc@audiosystemsgroup.com> wrote:
>
>
> Bob,
>
> I have come to realize that bonding the negative 12VDC lead to chassis at the
> power supply is a very bad idea. The applications note below explains why.
>
> k9yc.com/PowerSupplyBondingAndAudioDistortion.pdf
>
> The PSU chassis SHOULD, of course, be bonded to every other chassis in the
> station.
>
> In response to the original question, I am currently using a Powerwerx
> switching supply rated at 20A to float charge a pair of 6V 220 AH golf cart
> batteries. Before I bought those batteries, I used one of the biggest deep
> cycle batteries that Costco sells. They last at least 3 years in that sort of
> service. I used a float voltage of 13.8VDC with them, simply setting the
> regulator in the PSU to that voltage. The golf cart batteries want a higher
> float voltage. All of the 12V gear in my shack runs off this nominal 12V bus.
>
> The Powerwerx unit is RF quiet. I bought it to take on a DX trip. Before
> that, I used a little 10A regulated switcher that I paid about $10 for at the
> Milwaukee hamfest 10 years ago. It was VERY noisy, so I had to add a bunch of
> ferrite chokes to it, as well as a cap across the AC line. But it, combined
> with the Costco battery, was enough to keep up with my rigs, even during
> heavy contesting.
>
> I replaced the Costco batteries with the golf cart batteries as part of a
> solar rig for the shack. Thanks to the very tall redwoods that hold up my
> wire antennas, the solar panels are useless during the winter, but provide
> good charging during the summer months when my electrical rates go sky-high,
> hence the Powerwerx.
>
> 73, Jim K9YC
>
>> On 12/8/2013 8:39 AM, Bob McGraw - K4TAX wrote:
>> I use exclusively the ASTRON SS-30M at my stations and shop. Actually have
>> 3 of them. I find them to be reliable, acoustically quiet although I do and
>> can hear the fan switch on and off, and I find they are electrically quiet.
>>
>> I did add a true GROUND terminal to the rear panel. Internally I connected
>> the AC ground/green wire to this point and the 12V DC Neg to this point.
>> This point becomes "station ground".
>>
>> I also put a internal tooth lock washers between the outer shell and the
>> base where the 4 screws attach the outside cover. This assures the metal
>> parts are electrically bonded and not insulated by a layer of paint as found
>> in many instances with equipment today.
>>
>> As far as I'm concerned, the SS-30M it is a very good supply for the money.
>>
>>
>> 73
>> Bob, K4TAX
>>
>>
>>
>>
>>
>>
>> ----- Original Message ----- From: "denton sprague" <denton@oregontrail.net>
>> To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
>> Sent: Sunday, December 08, 2013 10:14 AM
>> Subject: [TenTec] which power supply…station efficiency
>>
>>
>> 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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>>
>>
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