[ARC5] Receiver Drift

[Mike Everette]

You might try something as simple as inserting a 915 kc crystal across the antenna lead; but this would be a test measure only.  Static charge buildup on the antenna, or lightning surges, would destroy the crystal if it's left in the circuit permanently.

We had a case with one of the NCSHP 42 MHz radio base station sites where a business-band transmitter on either 42.98 or 43.00 was eating us up on 42.80, and since there was no money to buy a filter (low band cavities are PRICEY), someone tried this... ordered a crystal for whatever the frequency was that needed to be rejected, and it did help some... until the next thunderstorm.

73

Mike
W4DSE

--- On Fri, 5/17/13, David Stinson <arc5 at ix.netcom.com> wrote:

> From: David Stinson <arc5 at ix.netcom.com>
> Subject: Re: [ARC5] Receiver Drift
> To: "Bill Cromwell" <wrcromwell at gmail.com>, arc5 at mailman.qth.net
> Date: Friday, May 17, 2013, 9:55 PM
> Tried a series-tuned wave trap,
> Bill?
> 
> ----- Original Message ----- From: "Bill Cromwell" <wrcromwell at gmail.com>
> To: <arc5 at mailman.qth.net>
> Sent: Friday, May 17, 2013 8:28 PM
> Subject: Re: [ARC5] Receiver Drift
> 
> 
> > On 05/17/2013 09:11 PM, Robert Eleazer wrote:
> >> Relative to the discussion on vintage receiver
> drift, this evening I fired up my BC-348-N.  I tuned in
> WWV on 15 MHZ and an hour later it was still right there.
> >> 
> >> Admittedly it was showing not quite right on 15 MHZ
> but that reflects my difficulties in alignment.
> >> 
> >> Now if I could just do something about the local AM
> station on 920 KHZ getting into the IF....
> >> 
> >> Wayne
> >> 
> > 
> > Hi,
> > 
> > Can you get a 915 or 925 kc xtal and move the IF by 5
> kc? What about a trap up front? Both? Or do you live under
> the transmitter tower?
> > 
> > 73,
> > 
> > Bill  KU8H
> > 
> > 
> >
> ______________________________________________________________
> > ARC5 mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/arc5
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:ARC5 at mailman.qth.net
> > 
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html 
> 
> ______________________________________________________________
> ARC5 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/arc5
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:ARC5 at mailman.qth.net
> 
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>