Now that is a comparison! Buxcom to DX Engineering. "hahaha"
Rolling my eyes...
From: "David Jordan" <firstname.lastname@example.org>
Sent: Friday, August 05, 2011 3:13 PM
Subject: Re: [TowerTalk] Metal roof
> Our court house has a copper metal roof (flat). Hustler Vertical antennas
> require an added $45. shunt coil (16 turns) to couple the low impedance to
> 52ohm coax. The Hustler vertical trap antennas are not designed to
> over a perfect or very good ground radial system. I guess there are more
> poor to fair radial systems out there then good ones. So those of us with
> good ones have to pay an extra $50 BUCKS... GO FIGURE! BUXCOMM sells
> OCF antennas and they offer their antenna in three options, all for the
> price. So, you tell them the wire is going to be up over 50ft you get one
> type of balun... if it close to the earth you get a different one or if it
> is going to be over a roof of a building yet a third type, but they don't
> screw you because of your choice, geez DX Engineering, hahaha
> ----- Original Message -----
> From: "Jim Lux" <email@example.com>
> To: <firstname.lastname@example.org>
> Sent: Friday, August 05, 2011 3:40 PM
> Subject: Re: [TowerTalk] Metal roof
>> On 8/5/11 11:44 AM, Pete Smith wrote:
>>> Without any direct experience, other than a trap vertical on a 20 x 40
>>> metal roof made up of 4x8 metal sheets, I'd say a vertical would work
>>> fine, but anything else nearby could be adversely affected. I also
>>> wonder, at least in theory, if you wouldn't risk imperfect electrical
>>> connections between shingles becoming harmonic-generating diodes, in the
>>> presence of a strong RF field.
>> But... what about all the harmonic generating diodes from the chicken
>> wire under the stucco, or the woven mesh of a chain link fence.
>> I think the harmonics & diodes thing pops up more in situations where
>> you have multiple transmitters in a single location, generating spurs
>> that get into receivers at that same location.
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