[TowerTalk] Fwd: Insulated elements, Yes - No?

[Stan Stockton]

Dan/Hans,

I cannot imagine building another antenna with parasitic elements mounted to an aluminum plate with the elements electrically connected to the boom and haven't made one that was connected in over a decade.  FWIW,  I don't think you will find an element on any antenna at W3LPL or K3LR grounded to the boom. It is certainly easier to model the antennas if they are floating. 

73...Stan, K5GO 

Sent from my iPad

> On Aug 5, 2014, at 12:40 PM, Hans Hammarquist via TowerTalk <towertalk at contesting.com> wrote:
> 
> Well Dan,
> 
> 
> I just received a TX38 from Cycle24. All the elements are insulated from the bom. I don't know if that's for convenience but the elements are clamped to the bom with plastic/hard rubber cleats. I have no problems with the engineering of it but it starts me wondering ...
> 
> 
> Hans
> 
> 
> 
> -----Original Message-----
> From: Dan Cisson <n4gnr at windstream.net>
> To: Hans Hammarquist <hanslg at aol.com>
> Sent: Tue, Aug 5, 2014 12:53 pm
> Subject: Re: [TowerTalk] Insulated elements, Yes - No?
> 
> 
> Hans,, about all driven elements are insulated from the boom,,, and I have 
> NEVER seen the other elements insulated from the boom,,, they are always 
> grounded to the boom(not insulated)...Dan N4GNR
> p.s. look at some of the commercial antennas like HyGain and M2,, look at 
> download manuals for those antennas
> 
> -----Original Message----- 
> From: Hans Hammarquist via TowerTalk
> Sent: Tuesday, August 5, 2014 12:32 PM
> To: towertalk at contesting.com
> Subject: [TowerTalk] Insulated elements, Yes - No?
> 
> When I, (too many years ago) read building instructions for yagi antennas it 
> was claimed that it didn't make a difference if the non driven element was 
> electrically to the bom or not. Now I see that the element are insulated 
> from the bom.
> 
> 
> What is the right thing to do? (I hope NOT to start a long discussion). Is 
> it the same thin with the driven element if I use a gamma match?
> 
> 
> Best 73 de,
> 
> 
> Hans - N2JFS
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