[Boatanchors] Lettine 240 Transmitter Plug In Coils

[Carl]

Same company, I believe all the coils are now using that construction

Carl
KM1H


----- Original Message ----- 
From: "D C *Mac* Macdonald" <k2gkk at hotmail.com>
To: "WB6KBL Knoppow, Richard" <1oldlens1 at ix.netcom.com>; 
<drewrailleur807 at yahoo.com>; <boatanchors at mailman.qth.net>
Sent: Sunday, December 12, 2010 5:37 PM
Subject: Re: [Boatanchors] Lettine 240 Transmitter Plug In Coils


>
> Have the folks who made the "Air-Dux" coils gone away?
> If I recall, they seemed to be of sturdier construction.
>
> * * * * * * * * * * *
> * 73 - Mac, K2GKK/5 *
> * (Since 30 Nov 53) *
> * Oklahoma City, OK *
> * USAF, Ret (61-81) *
> * * * * * * * * * * *
>
>
>
> ----------------------------------------
>> From: 1oldlens1 at ix.netcom.com
>> To: drewrailleur807 at yahoo.com; boatanchors at mailman.qth.net
>> Date: Sun, 12 Dec 2010 14:32:36 -0800
>> Subject: Re: [Boatanchors] Lettine 240 Transmitter Plug In Coils
>>
>>
>> ----- Original Message -----
>> From: "Drew P."
>> To:
>> Sent: Sunday, December 12, 2010 10:55 AM
>> Subject: Re: [Boatanchors] Lettine 240 Transmitter Plug In
>> Coils
>>
>>
>> >
>> > Lee wrote:
>> >
>> > [snipped for brevity]
>> >
>> > "What is really disturbing is new B&W coil stock at 1 3/4
>> > inches in diameter with many turns per inch, which would
>> > be used to re-coil a 80 meter and 160 meter coil base,
>> > sells for $80 for a 4 inch long piece from B&W direct!
>> > The price is insane. I think I can make my own coil stock
>> > for the high bands which have few turns per inch but close
>> > wound ones for 80 and 160 meters might be a real challange
>> > to make myself."
>> >
>> > How much demand is there for B&W coil stock these days?
>> > Welcome to the world of supply and demand.
>> > Statospherically high prices on many specialty items have
>> > certainly dissuaded me from attempting many otherwise
>> > appealing projects.
>> >
>> > A friend of mine made PA tank coil forms for his BC-610 by
>> > threading ABS (not PVC) pipe of appropriate diameter on a
>> > lathe. It was an easy matter to then wind the wire into
>> > the threads. This worked out well in operation with no
>> > undue heating of the finished coil.
>> >
>> > My friend is lucky in that "his" lathe runs on beer. (He
>> > tossed a six pack in the direction of his lathe-owning
>> > buddy).
>> >
>> > Drew
>> >
>> >
>> I also wonder about the logic behind B&W's pricing. If
>> the coils are uneconomical to make why not just discontinue
>> them instead of pricing them out of reach. One would think
>> that if low volume is the problem reducing the price and
>> advertising a little would increase it quite a bit. Or,
>> perhaps, they could just farm them out. I suspect that
>> whatever patents B&W has will have long ago expired and
>> would tell you how to make similar coils. Essentially, the
>> are just air-wound coils on strips of polystyrene for
>> support.
>>
>>
>> --
>> Richard Knoppow
>> Los Angeles
>> WB6KBL
>> dickburk at ix.netcom.com
>>
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