[TowerTalk] LightningProtectionDevicesPolyP, Response DAVIS RF Co.

[Steve Davis -Davis RF Co.]

Hi Steve,

Polyphaser's various types of lightning/surge in-coax line devices
, in part, incorporate a filter circuit .
These circuits are freqcy sensitive thus using an outside spec freqcy
application will introduce problematic attenuation to receive signals.
   A ref. was made to "gas tube", I believe in same context with PolyP.  It 
is only recently that Poly P introduced a gas tube type, which is a slower 
response time, albeit high current ability ( 50 KA).  They stayed away from 
these for quite some time due to the superiority of their diode and MOSFET, 
patented devices.  But, IMHO they went to gas tubeause there was a proven 
market for it,
less expensive (but what is $ 30 or so more to ultimately protect your 
cable, your equipment, your wife , kids and the dog  (my friend lost his 
house and dog, now uses PolyPhaser).
   We discount PolyPhaser.  Any questions feel free anytime to contact me.

73,   Steve ,  K1PEK,

DAVIS RF Co.,  Div. of Orion Wire Co., Inc.

Wire, Cable, RF Connectors and wire aerial parts.   LMR, Heliax, Eupen

Commercial / Military / & Custom Cable Design

tel:  978-369-1738     Fax:  978-369-3484
www.DavisRF.com



Message: 6
Date: Fri, 11 Sep 2009 09:09:01 -0500
From: "Steve Norris" <w5ki at aol.com>
Subject: Re: [TowerTalk] Question on Lightning Protection Devices,
Polyphaser, etc.
To: <towertalk at contesting.com>
Message-ID: <EB8B161717CC46B28D5E23D622CD4A62 at hamradio>
Content-Type: text/plain; format=flowed; charset="iso-8859-1";
reply-type=original

Thanks to inputs from Gary and Stan (and any future).  Both replies made
immediate sense to this older brain.  Seeing the size of series capacitance
in remote antenna switches to handle a KW on HF, I could relate.
Steve, W5KI

----- Original Message ----- 
From: "Gary Schafer" <garyschafer at comcast.net>
Subject: RE: [TowerTalk] Question on Lightning Protection Devices,
Polyphaser,etc.


> Probably not usable out of the design range. The Polyphaser devices have a
> series capacitor in them. On UHF it is a rather small capacitor and I
> don't
> think it is large enough for HF to pass.
>
> The higher the frequency the lower the power rating on them also.
> Different
> gas tubes for different frequency ranges.
>
> 73
> Gary  K4FMX

>> From:  W5KI
>> Subject: Question on Lightning Protection Devices, Polyphaser,etc.
>>
>> Have two general questions/assumptions on use of polyphaser devices at
>> frequencies OTHER than the design bands. ...
>>
>> Steve, W5KI
>>
>> _______________________________________________



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