Polyphaser made a test box for a few years...model was F.I.S.T. 4. Worked
really well..
Watch ebay...they may turn up there at times.
Cecil
K5DL
Sent using recycled electrons.
> On Mar 1, 2015, at 5:27 PM, "Tom W8JI" <w8ji@w8ji.com> wrote:
>
> When I test things like that, I high pot them with a home made tester. Things
> like this are not difficult to make. You can buy a surplus HV power supply
> used to ionize air for a few bucks, and stick it in a box with a meter on it.
>
> You don't need to get fancy, just check it for breakdown voltage. If it is
> bad, the breakdown voltage will be way off.
>
> Ameritron gets about 5-10 customers a year where gas tubes in lightning
> protection go bad. They break down early. The result of that is an amplifier
> can get up to a few hundred watts or more, and then *wham* the feedline
> shorts! This is always great on parts.
>
> I don't have a single GDT in my TX system, although I've tried them in my RX
> systems out in switch boxes near antennas. I have mixed results using low
> voltage GDT devices to protect relays and stuff. I have no damage at all in
> the house without them.
>
> 73 Tom
>
>
>
>
> ----- Original Message ----- From: "Art Snapper" <art@nk8x.net>
> To: "Greg Wilson" <n4cc@windstream.net>
> Cc: "160" <topband@contesting.com>
> Sent: Sunday, March 01, 2015 5:37 PM
> Subject: Re: Topband: Polyphaser
>
>
>> Polyphaser made a tester.
>> http://wrblock.com/WRBproducts/DIGIfist/DigiFIST.html
>>
>> Possibly a land mobile shop in your area has one. Essentially they
>> generated low current, high voltage until the tube fired.
>>
>> Perhaps it is different with HF, but in my land mobile experience, if the
>> supressor was damaged, either it was shorted, or obvious damage was
>> present when disassembled.
>>
>> Their antenna protectors have significant attenuation when used outside the
>> rated frequency range.
>>
>>
>> Art
>>
>>
>>> On Sun, Mar 1, 2015 at 7:17 AM, Greg Wilson <n4cc@windstream.net> wrote:
>>>
>>> Does anyone know how to test a Polyphaser to know if it is still good? I
>>> have some that have seen some lightning storms and was wondering if they
>>> are still doing the job. Thanks, Greg
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>>
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