I'm talking about a TA-33. No one has mentioned a Classic except for you. Read
MY postings that you are referring to......
AA6DX wrote:
> Sorry, Alan .. have to disagree with you. You did not scope out my
> posting.. Here the Mosely company is talking about their TRAP MASTER
> beams... not their CLASSIC! Actually, I agree with what you posted as to
> the way to hook up a yagi, BUT IF you are talking about the CLASSIC
> design, you are "wrongo" .. AND, I have used those type in VA, CA, and AK ..
> When you stuff an insulated waaarrr down the driven element, without any
> mechanical connection, your hypthesis is nil....
> Hey .. did you know Jack, KW6EJ? He and I chatted nightly on 2ØM, etc. in
> the late 60s.... I hadda job in hand, the commisary at Wake Island, but XYL
> did not want to move there with the two daughters, ready to enter school.
> Please don't confuse what I posted with what others typed!
> Mark .. AA6DX
>
> ----- Original Message -----
> From: "Alan C. Zack" <k7acz@cox.net>
> To: "AA6DX" <aa6dx@pacbell.net>
> Cc: "J.Hector Garcia M" <Hector@telecom1.net>; <towertalk@contesting.com>;
> "Randy" <rlake@webryders.net>; "Scott R." <w4pa@yahoo.com>
> Sent: Thursday, April 29, 2004 2:52 PM
> Subject: Re: [TowerTalk] Mystery Hy-Gain tribander
>
> Mark,
> I have to disagree with you. Below is the direct quote from the Mosley web
> site
> FAQ page:
> http://www.mosley-electronics.com/faq.htm
> Besides my using a Mosley at home they were used at most of the Coast Guard
> LORAN stations at Kure, Wake, Johnston, Yap, Marcus, Palau, etc, etc. where
> I
> would operate from.
>
> FEED SYSTEMS - THE SIMPLER, THE BETTER!
> Despite popular belief, linear radiators, normally employed in 2 and
> 3
> element
> parasitic arrays, have a driving point impedance of close to 52 ohms
> when open at
> the center. To feed such a radiator it is only necessary to connect
> a 52
> ohm line at
> this point to achieve the best possible match of line to antenna.
>
> However, because of certain design characteristics, some beam
> antennas
> require
> elaborate and, sometime, unstable matching devices such as Gamma or
> T-Match
> systems or variations of these systems. Such devices are usually
> difficult to adjust
> and to maintain in adjustment when used in multi-band beams.
>
> MOSLEY TRAP MASTER beams, however, are so designed as to not require
> any unwieldy matching arrangements. This beam is fed by connecting
> the
> line
> directly to the open center of the radiator. Thus, an excellent
> match is
> achieved
> over the entire width of each Ham band resulting in extremely low
> SWR
> near
> resonant frequencies of each band and the ability to range from one
> end
> of the
> band to the other without excessive SWR.
>
> By eliminating such matching devices, MOSLEY TRAP MASTER beams
> provide
> their users with stable and dependable operation without the
> necessity
> of frequent
> trips to the roof or up the tower to make readjustment.
>
> As I stated previously my Mosley was designed to connect a split lead coax
> directly to the driven element but I decided to use a 1:1 balun.
>
> AA6DX wrote:
>
> > The Mosely yagis often are(?)/were capacitive fed ... their "Classic"
> > series. No hard wired connection to the driven element. That created an
> > "unusual" situation, where the driven element is longer than the
> reflector!
> > Defeating a Classic system by connecting the coaxial cable directly to the
> > driven would be a no-no, as would any other means of feeding, without
> proper
> > engineering. Note .. no all Mosely's are/were "Classic" .. I have had
> > several that were, including my 2ØM monobander, w/46' boom ... worky
> > worky... and, at one time, a Classic 36 .. Mark---- AA6DX
> >
> > Original Message -----
> > From: "Alan C. Zack" <k7acz@cox.net>
> > To: "Randy" <rlake@webryders.net>
> > Cc: "J.Hector Garcia M" <Hector@telecom1.net>; <towertalk@contesting.com>;
> > "Scott R." <w4pa@yahoo.com>
> > Sent: Thursday, April 29, 2004 1:22 PM
> > Subject: Re: [TowerTalk] Mystery Hy-Gain tribander
> >
> > > Scott said there was no matching devices on the yagi. You say the
> SYS-36
> > has a
> > > hairpin matching device. I have a Mosley TA-33 that sounds very much
> like
> > what
> > > Scott is describing. I'd suggest checking out:
> > > http://www.mosley-electronics.com/amateur.htm
> > > and seeing if what he has matches any of the Mosley yagis.
> > >
> > > Randy wrote:
> > >
> > > > My guess would be a Wilson SYS-33....try to find some pics on the
> net..
> > > > I have a SYS36 - 1 trap on the driven ele.but I have a hairpin on the
> > boom
> > > > attached to the DE.
> > > > Good luck
> > > > Randy N1KWF
> > > >
> > > > ----- Original Message -----
> > > > From: "Alan C. Zack" <k7acz@cox.net>
> > > > To: "J.Hector Garcia M" <Hector@telecom1.net>
> > > > Cc: <towertalk@contesting.com>; "Scott R." <w4pa@yahoo.com>
> > > > Sent: Thursday, April 29, 2004 2:21 AM
> > > > Subject: Re: [TowerTalk] Mystery Hy-Gain tribander
> > > >
> > > > > I agree with J. Hector. A Mosley usually has one trap per element
> > leg,
> > > > where Cushcraft and Hy-Gain have two. And Mosley has a direct
> > connection to
> > > > the driven element, no matching devices,
> > > > > but I usually use a balun.
> > > > > 73
> > > > >
> > > > > "J.Hector Garcia M" wrote:
--
__________________________________________________________________________
Alan Zack
Amateur Radio Station K7ACZ
Las Vegas, Nevada, USA
Quality Engineer, The Boeing Company, Retired
Aviation Chief Warrant Officer, U.S. Coast Guard, Retired
U.S. Coast Guard, Always Ready, Always There
Every hour, Every day, Around the Clock and Around the World
SEMPER PARATUS
http://www.gocoastguard.com/
_______________________________________________
See: http://www.mscomputer.com for "Self Supporting Towers", "Wireless Weather
Stations", and lot's more. Call Toll Free, 1-800-333-9041 with any questions
and ask for Sherman, W2FLA.
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|