[Johnson] FW: FW: Will be restoring a Johnson Ranger**UPDATE

[Dave Harmon]

Pete...

You are at the correct place but look about 2 o'clock from the 'mods.gif'
you are clicking on.

Click on 'keyer_modification'.

 

 

73

 

David Harmon

K6XYZ

Sperry, OK

 

From: manualman at juno.com <mailto:manualman at juno.com>
[mailto:manualman at juno.com] 
Sent: Monday, February 14, 2022 5:50 PM
To: k6xyzdave at gmail.com <mailto:k6xyzdave at gmail.com> 
Cc: johnson at mailman.qth.net <mailto:johnson at mailman.qth.net> 
Subject: Re: [Johnson] FW: Will be restoring a Johnson Ranger**UPDATE

 

Dave:

I just did a screen capture of the Johnson list on BAMA. The only "keyer
mod" shown in the list targets the Viking I and II and VFO 122.

The keyer modification for the Ranger is 6 pages. There is a small schematic
of the Ranger keyer mod under Ranger/Problems and modifications to the
Johnson Ranger keyer circuit but that's not the document that Johnson
issued. Installation, adjustments, wiring into the Ranger circuit for the
keyer mod are all missing.

Where are you looking? AM I looking in the wrong area?

 

Note to readers: Since this is a text based reflector most likely you won't
see the screen capture below.

 

 

 

 

 

On Mon, 14 Feb 2022 15:32:15 -0600 "Dave Harmon" <k6xyzdave at gmail.com
<mailto:k6xyzdave at gmail.com> > writes:
> There are 2 Johnson keyers on BAMA.
> Years ago I did the same as you and saw the Viking 1 keyer and 
> didn't look
> any further.
> The keyer we are concerned with is to the right of the Viking 
> keyer.
> Look again...
> 
> 73
> 
> David Harmon
> K6XYZ
> Sperry, OK
> 
> -----Original Message-----
> From: manualman at juno.com <mailto:manualman at juno.com>
[mailto:manualman at juno.com] 
> Sent: Monday, February 14, 2022 3:23 PM
> To: k6xyzdave at gmail.com <mailto:k6xyzdave at gmail.com> 
> Cc: johnson at mailman.qth.net <mailto:johnson at mailman.qth.net> 
> Subject: Re: [Johnson] FW: Will be restoring a Johnson 
> Ranger**UPDATE
> 
> The only keyer mod I saw on BAMA was for the Johnson Viking I and II 
> and VFO
> 122.
> 
> For those that have their pencils out, the first Ranger schematic 
> that was
> issued, and did not have the keyer mod added, was dated 7/24/54.
> The keyer mod addition to the Ranger was offered to customers 
> shortly after
> 11/1/54. The keyer mod schematic is dated 10/28/54.
> All Rangers, factory wired or kitted after 11/15/54, had the 
> addition of the
> keyer modification.
> 
> Very easy way to tell if you have the keyer mod in the Ranger. 
> Remove the
> Ranger from the cabinet. Look straight down right over the VFO. Look 
> to the
> left of the VFO.  Over the Mode switch is an added chassis with two 
> tubes on
> it. That's the keyer mod. Simple! Don't even have to trace out any 
> wires.
> One tube, 12AU7 is the keyer and the other tube, 6AL5, is the bias
> rectifier. The -28 volts modulator bias is fed to the 6AL5 where 
> the
> negative bias is doubled to -56  volts to feed the keyer. Saved 
> Johnson from
> having to diddle around with the existing power transformer or 
> adding
> another small power transformer and parts.
> 
> Pete, wa2cwa
> www.manualman.com <http://www.manualman.com/>