[Elecraft] Peaking L34 (IF amplifier)

[Ron D'Eau Claire]

It's important to remember that the effect of L34 on the performance of the
K2 is as subtle as the peak. That is, the effect on receiver performance is
negligible as long as L34 is set somewhere in the general vicinity of the
"peak".

Ron AC7AC

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of David C Dawson
Sent: Saturday, November 18, 2006 3:44 PM
To: elecraft at mailman.qth.net
Subject: Re: [Elecraft] Peaking L34 (IF amplifier)


On Sat, Nov 18, 2006 at 07:32:44AM -0500, Don Wilhelm wrote:
> David,
> 
> Yes, the peak is VERY broad.  You may have to connect an AC voltmeter 
> across the speaker connector to find the peak if you cannot discern it 
> by ear.  The peak is normally 1 to 1 1/2 turns down from the top of 
> the can.  Be certain you are using CW mode.  If your peak is right at 
> the top of the can, check the value of C182.
C182 is a fairly big yellow disk ceramic marked '181', if that is correct,
then I guess I don't have a problem?

I have a software audio analyser (xanalyser) which I could use to find the
peak and I have a DMM which should measure audio frequencies just fine (It
has a range of 0 - 4MHz as a frequency counter).

Which would be preferable?
> 
> 73,
> Don W3FPR
> 
> > -----Original Message-----
> > First, I took Don Wilhelm;s advice about checking soldering and 
> > re-did anything I could find that looked dubious.
> >
> > Now, I've come to peak the IF amplifier.
> > It seems to me that a signal just gets louder when I turn the slug 
> > counter-clockwise until it hits the stop and quieter turning the 
> > slug clockwise. If there was a peak, it was a really shallow one.
> >
> > I followed the instructions and could hear the internal birdie quite 
> > well, so peaking should not have been difficult.
> >
> > Any suggestions, please?
> > Thanks.
> > --
> > David Dawson
> >
> 

-- 
David Dawson

A strong conviction that something must be done is the parent of many bad
measures.
                -- Daniel Webster

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