[Antennas] "Com-Rad" restricted space antenna

[Chris Boone]

The antenna in question is basically a short helix (which tend to
radiate in the vertical mode when the antenna is less than 1.4wl in
height and also the radius is small) even though it looks like a multi
layer DDRR antenna....BUT I tried one on 6m and it sucked...never could
get the SWR down to anything reasonable....never got a chance to look at
b/w because of that. No resistor from what I could see (unless the HF
model is different)
But anything less than a real 1/4wl series fed radiator will radiate
LESS as noted (you cannot get something for nothing!)

Chris
WB5ITT

> -----Original Message-----
> From: antennas-bounces at mailman.qth.net 
> [mailto:antennas-bounces at mailman.qth.net] On Behalf Of DJED1 at aol.com
> Sent: Monday, November 22, 2004 9:39 AM
> To: kargo_cult at msn.com; antennas at mailman.qth.net
> Subject: Re: [Antennas] "Com-Rad" restricted space antenna
> 
> 
> I would agree with Kurt- it may radiate but the bandwidth 
> specifications are 
> either pure imagination or there is one very large resistor 
> hidden somewhere 
> in there.   You can't beat the laws of physics.
> -An old antenna engineer
> Ed WB2LHI