[HBR] 3-section air variable

[Peter Bertini]

A three section tuning cap from a scrapped, better quality FM
tuner/receiver might be a good substitute.

On Fri, Aug 3, 2018 at 11:12 AM, <seibold at trainride.com> wrote:

> I haven't looked at HBR stuff in a long time. A better bet for you might
> be a Mallory Inductuner from Fair Radio Sales.  These were widely used for
> HF VFOs by strapping all 3 sections together.  If you use the search term
> air variable capacitor in Google you will find a bunch of the size you are
> seeking.
>
> 73
>
> Fred W9FWS
>
> -----Original Message-----
> From: "Paul Dulaff" <pdulaff at embarqmail.com>
> Sent: Friday, August 3, 2018 9:57am
> To: "HBR Receiver List" <hbr at mailman.qth.net>
> Subject: Re: [HBR] 3-section air variable
>
>
> Took a look and did not see a 3 to 25 pf   3 section capacitor typically
> used on HBR's. Is there a link somewhere on the site for these ?
>
> Paul - W2NMI
>
> ----- Original Message -----
> From: seibold at trainride.com
> To: HBR Receiver List <hbr at mailman.qth.net>
> Sent: Fri, 03 Aug 2018 10:45:36 -0400 (EDT)
> Subject: [HBR] 3-section air variable
>
> http://www.stormwise.com/page3.htm
>
> Find yourself a Jackson Bros (English firm) 5:1 drive for easier tuning
>
> Fred Seibold W9FWS
> First 'Phone back when there was one....
>
> -----Original Message-----
> From: "J Ed" <jedwardsat1 at gmail.com>
> Sent: Thursday, August 2, 2018 10:53pm
> To: hbr at mailman.qth.net
> Subject: [HBR] Hello
>
> Hi all.
>
> I'm Ed, AE7TE, and I'm interested in building an HBR.
>
> One of the issues I foresee is getting the capacitors. Namely, the
> three-section tuning cap. I have thought of building a trombone
> capacitor made of brass tubing and a screw mechanism. I'd have to come
> up with a way to link it to a tuning shaft - if I used a 2 inch travel
> actuated by an 8-32 threaded rod, that would mean 64 turns for full
> meshing. It could be possible to reduce it to 8 turns with clever
> mechanical arrangement.
>
> I'd also have to make my own IFTs. That's not hard, but needs care.
>
> Ed AE7TE
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>
>
> ______________________________________________________________
> HBR mailing list
> Home: http://mailman.qth.net/mailman/listinfo/hbr
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:HBR at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>