[Johnson] Ranger CW chirp

[Jim Brannigan]

I replaced some with units on hand and left the others alone.

Jim


> Jim: Where do you get the special temp compensated caps?
>
> Dave WB4FUR

> Subject: Re: [Johnson] Ranger CW chirp
>
>
> Whoops, hit the send too soon.....
> Also check the silver mica capacitors in the VFO.
> I had a drifting/chirp problem in my Ranger that was solved by replacing 
> all
> those capacitors.
>
> Jim
>
>>
>>> Hi Art,
>>>
>>> There is a keying control on the Valiant just like the Ranger, basically
>>> you
>>> adjust it until the oscillator runs with the key open and then back it
>>> off
>>> slightly from that position to where the oscillator stops.  You may
>>> remove
>>> some chirp by better adjustment of this control however:
>>>
>>> 1.  If the chirp is only on 40 meters, this is due to RF getting into 
>>> the
>>> VFO since it is operating on the same frequency as the final on this
>>> band.
>>> Try tightening the hardware on the VFO case.
>>>
>>> 2.  several people have reported that different 6AU6 tubes in the VFO
>>> behave
>>> differently with respect to chirp with the 6AU6WA being the best of all.
>>> You might try different tubes to improve this.
>>>
>>> 3.  Many transmitters of this vintage are likely to have some audible
>>> chirp
>>> on 15 and 10 because of the amount of frequency multiplication to get
>>> there;
>>> any minor chirp will be increased by a factor of 3 or 4 respectively.
>>> Consider it as personality, something the newer rigs don't have.  Or you
>>> can
>>> buy a lot of xtals from Bry and the chirp will no longer be an issue...
>>>
>>> 4.  At least it isn't as bad as the clicks from an unmodified FT-1000MP
>>> on
>>> 160.  I got a couple of nasty emails the first time I operated my
>>> FT-1000MP
>>> in a 160 CW contest, fortunately it was fairly easy to clean up.
>>>
>>> 73, Rodger WQ9E