That is in the works....
----- Original Message -----
From: "mcelmer1" <mcelmer1@netecin.net>
To: "Discussion of Ten-Tec Equipment" <tentec@contesting.com>
Sent: Wednesday, December 05, 2007 8:15 AM
Subject: Re: [TenTec] Cyberpower 3000 rif
>I suggest connecting the grounds together so they will be at the same
> potential. I don't expect this to solve the problem but it's worth a
> shot.
>
> Mike
> W8TRN
> ----- Original Message -----
> From: "Denton" <denton@oregontrail.net>
> To: "Carl Moreschi" <n4py@arrl.net>; "Discussion of Ten-Tec Equipment"
> <tentec@contesting.com>
> Sent: Wednesday, December 05, 2007 8:46 AM
> Subject: [TenTec] Cyberpower 3000 rif
>
>
>> Have a station consisting of a TT omni vi and vii.....have an rfi
>> problem...
>> I have a Cyberpower PR 3000 sine wave ouput, commmercial grade
>> uninteruptable power supply that is located in my basement with the case
>> grounded to an 8 ft ground rod going thru the basement wall. The input to
>> the ups is on an individual circut.
>> Output via the ups 30 amp 120 vac goes to the radio station on the main
>> floor, which shares an outlet with the radio station's power supplies and
>> the pc.
>> Battery pack for the Cyberpower is homebrew using two gangs of 4 38 amp
>> hour
>> gas absorption mat batteries wired in series to satisfy the ups 48 vdc
>> requirement.
>> I notice there is considerable rfi comming from the ups when it is
>> active.
>> The ups is supposed to be emi/rfi filtered and has an isolation
>> transformer
>> on the ups output. Scoping the output of the ups indicates a so called
>> clean
>> ac sine wave. Testing of the ac line input and output of the usp
>> indicates
>> correct wiring.
>> Clamp on ferrite chokes on the ac output of the ups has little effect.
>> I would like to get rid of the rfi into the radio station. Rfi is most
>> prevalent on 40 thru 20 meters..the other bands seem to be uneffected.
>> Radio station is heavly grounded on its own ground rod system, not
>> directly
>> connected to the ups.
>> I could run the hf transcievers on a dedicated circut with a
>> powersupply--blocking diode---battery pack, but would much prefer to keep
>> it
>> all on the same power source.
>> Any ideas? Thanks....
>>
>>
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>
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