[Johnson] Johnson digest, Vol 4 #88 - W3AM's Ranger Mods and Improvements

Fri, 6 Jun 2003 05:15:23 -0400

For many solutions to Ranger problems, such as VFO drift, and audio issues,
go to W3AM's web page.

http://www.w3am.com/ranger.html

He has made some excellent mods to improve the Ranger and bring it up to
current standards.  You do not have to make ALL of the mods, but if you do,
you will find that it has been time well spent.  If you have any problems
reaching his web page, I have a .DOC file of his Ranger mods.  Send me an
e-mail and I'll reply with the .DOC file as an attachment.

Gud Luck and 73, Larry - W1GOR

> Message: 2
> From: "W1GOR" <[email protected]>
> To: <[email protected]>
> Subject: Johnson digest, Vol 4 #87 - [Johnson] Ranger VFO
> Date: Thu, 5 Jun 2003 07:24:51 -0400
>
> Hello Mike,
>
> I have several Rangers and their VFO's have been modified to move all
> heat-generating components out of the VFO box.  I'll look through my files
> for any Ranger upgrades and e-mail them directly to you.
>
> 73, Larry
>
> > Message: 1
> > From: "MIke Wells" <[email protected]>
> > To: "Johnson Reflector" <[email protected]>
> > Date: Wed, 4 Jun 2003 10:34:21 -0600
> > Subject: [Johnson] Ranger VFO
> >
> > Hello Gang,
> >
> > I wonder if anyone can tell me why the spot signal on my Johnson Ranger
I
> is
> > different than the actual transmit frequency. The spot is approx 1.25 KC
> > lower in frequency.
> >
> > Also, I have been working on a rapid drifting problem with the vfo. I
> found
> > the 160 vfo coil had been padded with a 30 mmf cap that was bad and it
was
> > causing most of the drift. I also found the 18K resistor had been
replaced
> > with a 15k so I would assume the OA2 was drawing allot of excess current
> and
> > contributing to extra heat. I replaced this resistor under the chassis
> with
> > a 25k 5 watt wire wound. I know this is well above the 18K that it
called
> > for but with higher line voltages today will this cause any problems in
> the
> > vfo stability? The OA2 is igniting and measures the 150 volts so I guess
> it
> > is seeing voltage that is high enough. Any comments?
> >
> > Mike W0FD
>
>
> --__--__--
>
> Message: 3
> Date: Thu, 05 Jun 2003 07:42:06 -0400
> From: Tony Martin <[email protected]>
> Subject: RE: Johnson digest, Vol 4 #87 - [Johnson] Ranger VFO
> To: W1GOR <[email protected]>, [email protected]
> Cc: [email protected]
>
> Larry and Mike,
> I would love to be "info" on your info Larry.  I have a Ranger and also
> a Navigator...perhaps the same info might serve for both?  Thanks for
> your consideration.  Good luck Mike.
> Tony,W4FOA