[Lowfer] Need a High Capacitance Air Variable for receive purposes

[Douglas D. Williams]

Have you tried adding a fixed value cap in parallel, say 1000pf? You could
switch it in and out with a toggle switch.

D.

On Sun, Oct 30, 2011 at 11:03 PM, Andy - KU4XR <ku4xr at yahoo.com> wrote:

> Ed:
>
> For receive antenna peaking on LF... The Higher, the better.. I have a 450
> pF out of an old
> AM BCB Radio, but it just won't tune much on LF frequencies, so I really
> need something that
> when connecting the sections together, can give as I mentioned 600 to 1000
> pF, or higher..
>
> Andy
>
>
> ----- Original Message -----
> From: Ed Phillips <evp at pacbell.net>
> To: Lee <fccpart15 at earthlink.net>; "Discussion of the Lowfer (US,
> European, & UK) and MedFer bands" <lowfer at mailman.qth.net>
> Cc:
> Sent: Sunday, October 30, 2011 10:24 PM
> Subject: Re: [Lowfer] Need a High Capacitance Air Variable for receive
> purposes
>
> What total capacitance per section are you shooting for?  How many
> sections per knob?  Probably easier to wind higher inductance coils.  I
> have a few 'NOS' surplus capacitors kicking around somewhere and most
> are the standard 365 uufd/section.
>
> Ed
>
> Lee wrote:
>
> >I don't know how cheap they are anymore. But Nebraska Surplus Sales
> carried large
> >variable caps in the past.
> >
> >
> >-----Original Message-----
> >
> >
> >>From: Andy - KU4XR <ku4xr at yahoo.com>
> >>Sent: Oct 30, 2011 6:20 PM
> >>To: 600 Meter Group <600MRG at w7ekb.com>, "lowfer at mailman.qth.net" <
> lowfer at mailman.qth.net>
> >>Subject: [Lowfer] Need a High Capacitance Air Variable for receive
> purposes
> >>
> >>I am many years out of the loop of parts collectors, and have no network
> of local hams
> >>since I moved here 7 years ago..
> >>
> >>I would like to find, as cheaply priced as possible, an Air Variable
> with Capacitance in the
> >>600 to 1000 pF range.. Dual, or triple gang so I can add sections as
> needed..
> >>I need another one for receive antenna peaking..
> >>
> >>Let me know if you can help with one.. Thanks, and have a great day.
> >>
> >>Andy - KU4XR
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