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KG6BAJ > NWSGRP 29.09.09 21:43l 34 Lines 1240 Bytes #999 (0) @ WW
BID : 12069_N1OES
Read: GUEST
Subj: Re: Open wire feedline
Path: DB0FHN<DB0MRW<DB0ERF<OK0NHD<OK0PHL<OK0PCC<OM0PBC<OK0PPL<DB0RES<DK0WUE<
7M3TJZ<CX2SA<N6RME<KG6BAJ<KG6BAJ
Sent: 090929/1200Z @:KG6BAJ.#NCA.CA.USA.NOAM #:12069 [Grass Valley] InterGate $
** NEWSGROUP: rec.radio.amateur.antenna
** FROM : Michael Coslo <mjc5@psu.edu>
Tim Shoppa wrote:
> On Sep 29, 10:07 am, Cecil Moore <nos...@w5dxp.com> wrote:
>> However, 50 feet of ladder-line is ~1/4WL. The low 80m feedpoint
>> impedance tends to be transformed to ~4k ohms. Most built-in
>> autotuners will not handle such impedances.
>
> I personally think it's unlikely that even if someone is trapped by
> the fancy-pants autotuner they bought, that they probably don't need
> an extra fifty feet of line to deal with it. In my experience even ten
> extra feet of line at 80M can noticeably change the matching taps I
> use on my tuner if you're working in the 1/4 WL 65 foot feedline
> range. Of course that extra ten feet might make their fancy pants
> autotuner crap out on 20M, etc. and I can see how someone might start
> feeling like the old lady that swallowed the fly. I would rewrite the
> song to "swallowed the autotuner".
Wow, you do not like autotuners, eh?
I use both regular and autotuners, and both work pretty well for me.
Neither wear pants, fancy or otherwise 8^)
- 73 d eMike N3LI -
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