Topband: Polyphaser

[Cecil]

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 at 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 at nk8x.net>
> To: "Greg Wilson" <n4cc at windstream.net>
> Cc: "160" <topband at 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 at 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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