Adjustable metal tape HF antenna

[George Maier]

Hi All:
I've had the HyGain version (Collins used the same one, but with a private label)
for many years and have used it only a few times. Also have a KWM-2 in a Collins/
Samsonite suitcase with the PM-2. Never took the time to measure the VSWR, as we
were camping and took only the basics, but it always worked quite well.
73
George - K1GXT

"Stephens, Al" wrote:

> Hue (and others),
>
>      I couldn't really say.  Being under field conditions and with a lot
> else happening it served to get up and on the air in the fastest time.  I
> don't think anyone ever put any meters on it to check SWR or the like - just
> set it and load it up and operate.
>      The tapes were marked according to meters or frequencies, as I recall,
> and once pulled out to the requisite length they were tightened down with a
> thumbscrew clamp.  From the design I would say it probably did not add a
> lumped inductance, but the part rolled up acted as a single conductor.
>
>     73,  Al  N5AIT
>
> -----Original Message-----
> From: Hue Miller [mailto:kargokult at PROAXIS.COM]
> Sent: Thursday, September 06, 2001 4:25 AM
> To: BOATANCHORS at LISTSERV.TEMPE.GOV
> Subject: Re: Adjustable metal tape HF antenna
>
> ----- Original Message -----
> From: N5AIT Allan Stephens <MODSTEPH at ACS.EKU.EDU>
> To: <BOATANCHORS at LISTSERV.TEMPE.GOV>
> Sent: Sunday, January 14, 2001 4:25 PM
> Subject: Re: Adjustable metal tape HF antenna
>
> >      Back in my Air Force communications days (mainly '60's)
> > we regularly deployed with KWM-2A's for tactical HF capability.
> > I was in TAC (Tactical Air Command) at the time and we were
> > designed to deploy: when the army would go off into the woods,
> > we went along to set up radar and communications for tactical
> > air control.
> >      The measuring tape antennas were standard issue to go along
> > with the KWM-2A's since they were easily deployed, relatively
> > foolproof in setting to the right length, and they did the job
> > as well as any dipoles.  Beat having to cut separate antennas
> > as frequencies changed.
>
> I haven't seen one of these, so i'm just imagining. And wondering:
> did the coiled up unused lengths add any unexpected inductive
> loading effects, so that the actual required lengths differed
> noticeably from the calculated requirement?
> Tnx, Hue Miller
>
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