[Johnson] Is there a Ranger Keyer/Bias Version Between 1954and1958 ?

[Greg Mijal]

If I remember correctly the original Ranger did not use the keyer tube so
Yes there is a difference. Try to find the correct manual for your radio.
Greg
WA7LYO
in sunny Feenix
----- Original Message ----- 
From: "David C. Hallam" <dhallam at rapidsys.com>
To: "Johnson-List" <johnson at mailman.qth.net>
Sent: Tuesday, March 07, 2006 2:42 PM
Subject: RE: [Johnson] Is there a Ranger Keyer/Bias Version Between
1954and1958 ?


> Documentation for Johnson rigs seems hard to come by.  Any manuals or
> schematics should be verified by comparison to your rig.  I have an
Invader
> 200 and two manuals for it.  One is the manual delivered with the rig.  I
> have found errors in the voltage and resistance charts, parts missing or
> incorrect in the BOM, and undocumented circuit and parts changes in the
> schematic.  On the other hand, I suspect Johnson was no different from any
> of the equipment manualcturers of the era.
>
> David
> KC2JD
>
> -----Original Message-----
> From: johnson-bounces at mailman.qth.net
> [mailto:johnson-bounces at mailman.qth.net]On Behalf Of C E
> Sent: Tuesday, March 07, 2006 3:52 PM
> To: Larry Rau; Johnson-List
> Subject: Re: [Johnson] Is there a Ranger Keyer/Bias Version Between 1954
> and1958 ?
>
>
> Hi Larry:
> Something tells me that this may have been an
> "interim" Ranger.
>
> On the schematics from Bama, did you download the
> Dejavu viewer? That would be most helpful to your
> cause. Cal, N6KYR/8
>
> --- Larry Rau <captainlarry at jps.net> wrote:
>
> > Basics:
> >
> > I have following manualsand schematics:
> >
> > 1954 Ranger Schematic..... no  12AU7 keyer tube and
> > no V-14 6AL5 Bias
> > Rectifier (cathode keying and mod bias resistor)
> > 1958 RangerSchematic... has added plate by VFO with
> >  12AU7 and
> > 6AL5..supplying bias to modultor and keying circuit.
> >
> > My Odd Ranger Problem :
> >
> > I just got a ranger, which has plate  mounted by the
> > VFO...with the Keyer
> > and Bias Tubes...
> > BUT... the modulator retains the old cathode
> > resistor bias from the 1954
> > version... ..and the keyer doesnt match the
> > schematic from 1958... despite
> > being obviously original.
> >
> > So what I have is a keyer, with a bunch of 2 watt
> > resistors in a divider
> > network that has nothig to do with the schematic of
> > 1958.... and a 6AL5 bias
> > rectifier... without the voltage divider to provide
> > -28v modulator bias...
> > only keyer bias.
> >
> > In other words.. I've  got no docs on this apparent
> > intermediate version of
> > the keyer/bias supply.
> >
> > Anybody got any ideas...
> >
> > Please dont refer me to BAMA... I cant download
> > anything off that *&O:LRLF
> > !!! thing !
> >
> > Is it worth the trouble to re-wire this to the newer
> > specs... ?
> > (somewhat hard to do without the proper diagram for
> > this version )
> >
> > larryW6WUH
> >
> >
> >
> >
> >
> > Johnson mailing list
> > Home:
> > http://mailman.qth.net/mailman/listinfo/johnson
> > Help: http://mailman.qth.net/mmfaq.html
> > Post: mailto:Johnson at mailman.qth.net
> >
>
>
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