[ARC5] Calibration of Hetrodyne Freq Meters

[Leslie Smith]

An article on the web describes the automated process used to generate individual calibration charts (or books) for the BC-221 series sets.  The original method was long and involved.  I believe the only practical way to produce an alternate book would be by hand, using a digital frequency counter.  Links below are useful, but not provide the decription referred to previously.

http://www.royalsignals.org.uk/files/221/bc221cal.htm 
http://www.jproc.ca/ve3fab/bc221.html
http://www.hanssummers.com/downloads/index.htm#bc221

As I say before, the links above do NOT contain the article referred to above, but the last link refers to an article in 73 magazine that describes the process of converting a BC-221 to solid state, and (most important) observations for calibration.

73s from Les Smith


> ----- Original Message -----
> From: "Henry Mei'l's" <meils at get2net.dk>
> To: boatanchors-request at mailman.qth.net, arc5 at mailman.qth.net
> Subject: [ARC5] Fw: Milsurplus Digest, Vol 79, Issue 13
> Date: Sun, 7 Nov 2010 12:55:03 +0100
> 
> 
> 
> ----- Original Message -----
> From: "Henry Mei'l's" <meils at get2net.dk>
> To: <milsurplus at mailman.qth.net>
> Sent: Saturday, November 06, 2010 6:28 PM
> Subject: Re: Milsurplus Digest, Vol 79, Issue 13
> 
> 
> > LM-14, minus frequency calibration chart:
> >
> > I'm getting hold of  an LM-14, tomorrow, minus calib. chart.
> > Read a radio-mag (CQ?) article years back about a way of making 
> > your own chart -- anyone recall this or have
> > another solution?  I could of course use a frequency counter to 
> > make up some kind of bench-mark
> > key point chart, but ...
> >
> > >
> > 73,
> > Henry, OZ1UF-OU5T  / N2NR
> >
> >
> ______________________________________________________________
> 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

>


-- 
_______________________________________________
Surf the Web in a faster, safer and easier way:
Download Opera 9 at http://www.opera.com