[Johnson] Ranger VFO chirp on 40 Meters

[Brian]

Yes, this is the one.  Thank you.  I intend to do this to all three of my Ranger (two Rangers, one Ranger II) when I have them on the bench for other reasons. 

Sent from my iPad

> On Mar 7, 2014, at 9:55 AM, Mike K9UW <k9uw at wi-net.com> wrote:
> 
> 
> 
> Is this the link you're referring to,
> Brian?
> 
> http://www.w8ji.com/johnson_vfo_chirp_jump.htm [5]
> 
> 73, de Mike,
> K9UW
> Amherst, WI 
> 
>> On Mar 07, 2014, Brian wrote: 
>> 
>> There is a
> relatively simple modification to fix this problem but I don't remember
> where it is however I saw it on someone's website. The problem is a
> poorly designed ground and this modification resolves it. A little
> searching on the web and I am confident you will find it. I am limited
> to iPad now so I'll leave that up to you. 
>> 
>> Sent from my iPad
>> 
> On Mar 7, 2014, at 9:08 AM, Eddy Swynar <deswynar at xplornet.ca> wrote:
> 
>>> 
>>>> On 2014-03-07, at 9:52 AM, WQ9E at btsnetworks.net wrote: Jim,
> Eddy correctly identified the problem. It is from RF entering the VFO on
> 40M where it is operating on the same frequency as the final. This
> problem is even more common with the higher power Valiant although my
> even higher power Viking 500 shows no sign of this problem and I have
> never heard of anyone having it with the 500. In really severe cases it
> will also cause some FM when operating AM. The only instance where I had
> to go beyond tightening all of the VFO mounting screws properly (surface
> oxidation causes poor contact with age) was in an early Valiant which
> had a long factory slot cut into the case where the VFO shaft enters. I
> had to add some metallic shielding tape to this one and it cured the
> problem. I expect the problem doesn't show up on 160 since it takes a
> bigger "leak" in the shielding to let this lower frequency radiation
> into the VFO. It can be successfully cured, I have a Ranger 1, Ranger 2,
> Valiant 1, Valiant 2, Viking 500, Navigator, and Pacemaker and none
> chirp on 40 CW. Rodger WQ9E
>>> Hi Jim & Roger, In my case all it took to
> fix the problem was a re-tightening of all of the VFO enclosure
> screws---yes, the solution to such a vexing issue really & truly was
> just that simple! ~73~ de Eddy VE3CUI -VE3XZ
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