[Antennas] 5-Band Quad VSWR Measurements?

2003年1月02日 07:43:59 -0800

Walt,
Have you talked with Lightning bolt?? I would have charts or graphs of the
frequency (say every 25 or 50 KHz increments) versus frequency for each
band.
Which bands has this happened on?? All Bands??? Is the bandwidth just
narrower?? Or has the one or more bands reached the point where there is no
point with low swr??
I would be very interested in such information and I am considering a
multiple element cubical quad. Lightning bolt is one of the units I am
considering.
I did look at the reviews. The reviews What I saw was very encouraging, but
I didn't see any reviews on the 4 element units.
Full of Curiosity,
 Rolly W7DGX
[email protected] wrote:
> Walter,
> I wouldn't be satisfied either.
> I did a search and found several hams using the Lightning Bolt quad
> http://www.eham.net/reviews/detail/423 I would contact them and see if
> they had any insight
>> Randy
> AC7NJ
>> -----Original Message-----
> From: [email protected]
> [mailto:[email protected]] On Behalf Of Walter J. Slazyk
> Sent: Thursday, January 02, 2003 13:03
> To: David W Sher
> Cc: [email protected]
> Subject: Re: [Antennas] 5-Band Quad VSWR
>> Dave,
>> Thanks anyway for the reply, but like I said in my original message, I
> already have the tuner and am using it. However, knowing how excellent
> the
> bandwidth was with the 2-element quad in relation to the way it is now,
> ..."I will never be satisfied until the quad can be tuned for a better
> VSWR."
> 73
> Walt KF2XN
>> ----- Original Message -----
> From: "David W Sher" <[email protected]>
> To: <[email protected]>
> Cc: <[email protected]>
> Sent: Thursday, January 02, 2003 04:45
> Subject: Re: [Antennas] 5-Band Quad VSWR
>> > Suggest you get some sort of auto tuner, and enjoy kicking tail.
> >
> > Dave W9LYA
> > What wrought doG hath?
> >
> > On Thu, 2 Jan 2003 04:10:10 -0500 "Walter J. Slazyk"
> <[email protected]>
> > writes:
> > > Dear Group,
> > > During 2002, I purchased the Lightning Bolt retrofit kit and
> > > upgraded my
> > > 2-element (8' boom) quad to a 4-element (24' boom). The design is
> > > typically
> > > for a single coax feed line through a balun, using a 150' run of
> > > LMR-400
> > > coax from the tower to the shack. I was very careful to cut the wire
> > > loops
> > > with precision to the specifications that come with the kit. When
> > > completed,
> > > I raised it to about 65' and graphed VSWR readings on all 5 bands.
> > > My
> > > concerns are that the readings are substantially increased over my
> > > old
> > > 2-element unit and well over 2.5:1 in some parts of the band.
> > > Previously,
> > > the quad had excellent bandwidth with pretty flat SWR readings with
> > > excursions not much higher than 1.5:1 with fairly decent directivity
> > > and
> > > side lobe attenuation. With the retrofit 4-element unit, I now have
> > > to use a
> > > tuner to get back to 1:1 SWR but this think kicks some serious
> > > tail.
> > > Directivity seems unimpressive but I get through the nastiest
> > > dogpile on the
> > > first few calls but because I am aware of the crappy VSWR, I will
> > > never be
> > > satisfied until the quad can be tuned for a better VSWR. I have
> > > tried just
> > > about everything but am open to helpful suggestions short of junking
> > > it and
> > > going back to a manufactured tri-band beam.
> > > Any ideas?
> > > Walt KF2XN
> > >
> > >
> > > - - -
> > >
> > > Your moderator for this list is:
> > > Larry Wilson KE1HZ [email protected]
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> > >
> > - - -
> >
> > Your moderator for this list is:
> > Larry Wilson KE1HZ [email protected]
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>> - - -
>> Your moderator for this list is:
> Larry Wilson KE1HZ [email protected]
> _______________________________________________
> Antennas mailing list
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> http://mailman.qth.net/mailman/listinfo/antennas
>> - - -
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> Larry Wilson KE1HZ [email protected]
> _______________________________________________
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