Re: [TowerTalk] Need info on balun for Hygain TH-7DX antenna

[W0MU Mike Fatchett <w0mu@w0mu.com>]

Those baluns were and probably still are pretty bad.  Many other better 
solutions available.
On 4/2/2020 2:18 PM, Billy Cox wrote:
> Hi Ray, yes, that is true as to the dual driven element KLM/M2 antennnas.
>
> But the THx series uses the older BN86/newer BN4000 units, which are 1:1.
>
> 73 de Billy, AA4NU
>
>
> > On April 2, 2020 at 3:11 PM Raymond Benny <rayn6vr@gmail.com> wrote:
> >
> >
> > If its feeding a dipole type antenna, which your antenna is,  you need a
> > 1:1balun. 1:1 matches 50 ohm coax to the dipole element, which is near 50
> > ohms.
> >
> >   If it is a dual driven element then use a 4:1 balun. Dual driven element
> > impedance is near 200 ohm and is transforms 50 ohm for the coax.
> >
> > Ray
> > N6VR
> >
> > On Thu, Apr 2, 2020, 1:01 PM Mark Pride via TowerTalk <
> > towertalk@contesting.com> wrote:
> >
> > > Pretty certain its 1:1
> > >
> > > Regards,
> > >
> > >   Mark, K1RX
> > >
> > >
> > >
> > >
> > >
> > >      On Thursday, April 2, 2020, 04:00:21 PM EDT, <marsh@ka5m.net> wrote:
> > >
> > >   It never ceases to amaze me how much basic technical information is NOT in
> > > product manuals.
> > >
> > > 73,
> > > Marsh, KA5M
> > >
> > >
> > >
> > > -----Original Message-----
> > > From: TowerTalk <towertalk-bounces@contesting.com> On Behalf Of Phil
> > > Sent: Thursday, April 02, 2020 2:26 PM
> > > To: towertalk@contesting.com
> > > Subject: [TowerTalk] Need info on balun for Hygain TH-7DX antenna
> > >
> > > It appears that the balun on my TH-7 has died.  Can someone please tell me
> > > if this is a 4:1 balun....the Hygain manual is silent on this subject as
> > > far
> > > as I can tell.
> > >
> > > thanks, 73, Phil  W5BVB
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