|[AMRadio] Early version Johnson Ranger I|
w3wkr at verizon.net
Sat Jan 1 10:33:46 EST 2005
I have an earlyRanger that has a keyer added. Your right, it is a small
chassie supported by three long standoff and is positioned above the operate
switch. Since the transformer on the Ranger 1 did not have taps on the
transformer for the negative voltage supply, there were abunch of 10 watt
carbon resistors in a voltage divider to feed the 6al5 to generate the -40
volts for the keyer.
If you considering modifications, look at W3AM and WA2HLR changes. I have
made those changes and am within a week or so of completing then. BTW, they
also have a PTT circuit if you going AM
----- Original Message -----
From: "Frank" <W7ND at earthlink.net>
To: <amradio at mailman.qth.net>
Sent: Saturday, January 01, 2005 2:19 AM
Subject: [AMRadio] Early version Johnson Ranger I
> Happy New year to all.
> I am in the process of restoring a Johnson Ranger I. I obtained part of
> manual and a schematic. That's when I noticed that two of the tubes were
> "missing." The tubes are the 6AL5 bias tube and the 12AU7 keyer tube.
> My mystery was solved when I learned that the earliest version of the
> Johnson Ranger I used cathode keying and omitted the circuits around the
> 6AL5 and the 12AU7. I have since downloaded the schematic for this early
> version Ranger from the bama web site.
> I would like to obtain a manual for this early version of the Ranger. I
> have written W7FG to see if he has them available. So far, no answer.
> So can anybody help me out? Obviously I'd be happy to pay for the
> postage and the trouble.
> A second question is whether I should refit this old Ranger to bring it up
> to the later version standard. Makes sense from an operational
> but what's the feeling about keeping this Ranger preserved as the early
> Thanks and 73,
> Frank, W7ND
> P.S. The serial # on my Ranger I is 622.
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