[Hallicrafters] Dummy antenna for S40 alignment

[Edward B Richards]

Dear grouch;

You are absolutely right. The best (only) way to get a perfect match.

73, Ed Richards K6UUZ


On Fri, 10 Dec 2004 20:52:29 -0500 "Al Parker" <anchor at ec.rr.com> writes:
> hi guys,
>     The main thing you wanta do is set up the rcvr for what 
> impedance you
> plan to feed into it.  If the S-40 has no antenna trimmer, then you 
> can't
> do any adjusting other than your alignment, e.g. SP-600.  If it does
> you've got some leeway. (don't stop hr)
>     A resonant antenna is resonant on only a very narrow band of 
> freqs.,
> whether it has a balanced, open wire feedline, or what. So, 
> elsewhere, the
> impedance is gonna be off, sometimes way off.
>     What you really wanta do is use an antenna tuner for your 
> receiver if
> you're "band cruising" no matter what antenna you use.  You've 
> either
> gotta tune the antenna system to the rcvr or the rcvr to the ant. 
> sys.
>     I've done it, and demonstrated it to others, with SP-600's.  Any 
> wire
> is gonna be a very high, or very low impedance in many places across 
> the
> SW bands.  You can hear something then, but if you use a tuner and 
> adjust
> it to feed the rcvr in the imp. range it expects, just like "we 
> know" we
> hafta do with a transmitter, you'll hr more.  tuner - that's how you 
> get
> the best transfer of energy, rcvg or xmtg.
>     that's my story & I'm stickin to it.
> 73,
> Al the grouch
> W8UT
> 
> ----- Original Message ----- 
> From: "Craig Roberts" <crgrbrts at verizon.net>
> To: "Edward B Richards" <zuu6k at juno.com>; "hallicrafters"
> <hallicrafters at mailman.qth.net>
> Sent: Friday, December 10, 2004 5:19 PM
> Subject: Re: [Hallicrafters] Dummy antenna for S40 alignment
> 
> >
> > I was actually toying with the idea of building an old style open 
> feeder
> > line doublet, per Army instructions, for my Hammarlund SP-600 
> (which has
> > a 100 ohm input impedance) and seeing if it would make any 
> discernable
> > difference.  Does anyone feed their antique receiver with an 
> antique
> > resonant antenna?  If so, how's it work?
> >
> > 73,
> >
> > Craig
> > W3CRR
> 
> 
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