[Johnson] Johnson digest, Vol 4 #88 - More Ranger Mods

Fri, 6 Jun 2003 05:34:34 -0400

Here are some mods to the Johnson Ranger, by Tim Smith...

http://www.amwindow.org/tech/htm/rangtron.htm

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
>