[TowerTalk] TH7-DX Balun

[k2qmf@juno.com]

That was plate power "input" in the old days.
at 70 percent efficiency you had 700 Watts out not 3000!!!

73,  Ted  K2QMF


On Wed, 23 Feb 2005 10:36:00 -0500 Gary Schafer <garyschafer at comcast.net>
writes:
> Just a note about power handling ability: I don't know what the BN-86 
> 
> was actually rated at but for 1kw input power on AM that equated to 
> a 
> power output of around 3000 watts by today's standards. We can 
> actually 
> run less power now than in the old days.
> 
> 73
> Gary  K4FMX
> 
> ChetMoore wrote:
> > Byron
> > 
> > The BN-86 has been around for 35+ years and was designed when we 
> could only 
> > run 1 KW.  Force
> > 12 makes a 3 (b-12) and a 5 KW balun.  Radio works I think makes a 
> 3 and a 5 
> > K Balun.  If you are going
> > to be running 1.5 kw, then you might want something beefier.  With 
> a trap 
> > antenna, you have the possibility
> > of hi swr entering the mix if you get water and or insect nests 
> built into 
> > the traps.  The resulting hi swr
> > frequently manifests itself by heating and destroying the balun
> > 
> > W2GD once told me that a balun was just something else to GO WRONG 
> and says 
> > to make a
> > coax choke balun and never have to deal with "balun" problems 
> ever.
> > 
> > chet N6ZO
> > ----- Original Message ----- 
> > From: "Byron Tatum" <bjtatum at ev1.net>
> > To: <TowerTalk at contesting.com>
> > Sent: Wednesday, February 23, 2005 1:54 AM
> > Subject: [TowerTalk] TH7-DX Balun
> > 
> > 
> > 
> >>I have been away for a few days but noticed a few subject lines 
> covering 
> >>the TH7-DX balun, the BN-86. I have a TH7-DX that will be going up 
> in near 
> >>future, what is the best balun to use for it? I know that when I 
> assemble 
> >>it I will use the updated assembly notes for better 10 meter 
> performance, 
> >>but what about the BN-86 balun, is it the best one to use? Thanks, 
> Byron.
> >>_______________________________________________
> >>
> >>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 at contesting.com
> >>http://lists.contesting.com/mailman/listinfo/towertalk
> >>
> > 
> > 
> > 
> > _______________________________________________
> > 
> > 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 at contesting.com
> > http://lists.contesting.com/mailman/listinfo/towertalk
> > 
> > 
> 
> 
> 
> _______________________________________________
> 
> 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 at contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
> 
>