try brassies first and if that doesnt help much, add the wire. The
helicals I had I used 1/4watt resistor lead.
On Thu, 24 Feb 2005 22:09:24 -0600, Brent <[EMAIL PROTECTED]> wrote:
>
> the front end is from a standard RPT-21
> there is approx 4 complete turns of wire the size of a 1n4001 diode lead..
> and well matter of fact the same material
> and it has aluminum slugs
>
> ----- Original Message -----
> From: "DCFluX" <[EMAIL PROTECTED]>
> To: <Repeater-Builder@yahoogroups.com>
> Sent: Thursday, February 24, 2005 9:24 PM
> Subject: Re: [Repeater-Builder] Helical Front end UHF
>
> >
> > We need a little more information on the repeater you have, such as
> > the model number and the rough dimensions of the coils and the cavity.
> >
> > I have converted a Yaseu FTC-4610 from 474 to 443MHz (With .32uV
> > sensitivity) by adding 1/2 of a turn to the top of the coils, perhaps
> > the same can be accomplished here. Also you can try replacing the
> > slugs with a different material such as Brass or Aluminum to shift the
> > resonance, I have used brass screws on a VHF micor with good but not
> > perfect results.
> >
> > On Thu, 24 Feb 2005 20:55:42 -0600, Brent <[EMAIL PROTECTED]> wrote:
> > >
> > > SPEAKING of front ends...
> > > I have a set of helical Resonator from a standard repeater... and it is
> on
> > > 467.2 rx and moving it to the 448.000
> > > Everything else tunes up just fine, so the thought was to add about 1/4"
> of
> > > same material and size wire that it is already wrapped with
> > > so the tuning slugs wont be so far down in the cans...(not much height
> on
> > > the cans themselves). and a 1/4" could it me that much that the slugs
> are
> > > now out of the can.. ???
> > > or would I want to try to move the Tap on the coil first any thoughts.
> > > thanks
> > > Brent
> > >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
> >
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> Yahoo! Groups Links
>
>
>
>
>
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