[Mobile-Portable] Webster Bandspanner Info

[Bob Good]

You are correct.  That's the values I used.  I think one will find that 
using caps instead of a tapped coil will provide a little less bandwidth but 
it's a whole bunch easier.   K4BG

--------------------------------------------------
From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
Sent: Wednesday, March 03, 2010 18:26
To: <mobile-portable at mailman.qth.net>
Subject: Re: [Mobile-Portable] Webster Bandspanner Info

>
> If I remember correctly, good matching was obtained
> by using a 1000 pFd mica or 470 pFd mica cap shunted
> from the base of the antenna to ground.  1000 pFd for
> 75m and 470 pFd for 40m.  Use progressively lower for
> the higher bands.
>
> It was pretty much the same for the Master Mobile
> Hi-Q single-band coils with a 3' base section and
> 5' top whip (which I used in 62-72).
>
> I went to the adjustable Master Mobile Matcher to
> resonate the antenna up and down in frequency and
> the adjustable Master Mobile Micro-Z matching network
> to match the antenna to 50 Ohm impedance.
>
> 73 - Mac, K2GKK/5
> (Since 30 Nov 53)
> Oklahoma City, OK
>
> p.s.  That antenna system still resides in my garage.
> It worked a whole lot better than Webster Bandspanners
> or the Slim Jims, especially on 75 and 40 meters.
>
>
>
> ----------------------------------------
>> From: k4bg at planters.net
>> To: mobile-portable at mailman.qth.net
>> Date: Wed, 3 Mar 2010 16:35:03 -0500
>> Subject: Re: [Mobile-Portable] Webster Bandspanner Info
>>
>> Tom....I hope someone can help. I also have an "original" 50's long model
>> color brown in great shape and used it until recently but sold the pickup
>> and mobile xcvr. I too would love to get any sort of paperwork to go with
>> the antenna. It works great in my opinion. I constructed a capacitor 
>> match
>> at the base using plug-in 1/4" phone plugs for 80 and 40 meters with the
>> caps inside the plug shells. Us old timers remember them well.....73,
>> Bob K4BG
>>
>> --------------------------------------------------
>> From: "Tom Bates"
>> Sent: Wednesday, March 03, 2010 06:55
>> To:
>> Subject: [Mobile-Portable] Webster Bandspanner Info
>>
>>> Greetings...
>>>
>>> Anyone on the list have a copy of "Mobile Antennas ... Simple steps to
>>> peak performance" by Webster Manufacturing? I have a pdf of the
>>> original
>>> instructions that came with the bandspanner, and that pub mentions the
>>> other
>>> one that I'm looking for.
>>>
>>> Help??? Thank You,
>>>
>>> Tom - AA1NZ
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