[Johnson] Will be restoring a Johnson Ranger
William Cromwell
wrcromwell at gmail.com
Tue Feb 15 07:42:35 EST 2022
Hi Pete,
Thanks for all that information. I will be looking at my own Ranger to
see which version of the keyer and bias arrangement is in it. I have the
original manual for it so that will avoid having to open the Ranger and
trace wiring. I believe I have the later Ranger, purpose built (memory
you know). I want to be aware of what I am looking at when I work on it.
73,
Bill KU8H
bark less - wag more
On 2/15/22 1:30 AM, manualman at juno.com wrote:
> Let me point out that the Ranger actually had two "keyer mods" One was to
> upgrade the original Ranger with the keying mod kit. This one did not
> connect to the center tap of T3 nor were there extra taps on the power
> transformer T1. For this kit, Johnson used the T1 connections that went
> to Pins 3 and 5 of the 6AX5 low voltage rectifier.
>
> When the manufacturing design was upgraded to include the keying
> circuitry within the overall circuitry, the keying circuitry and the
> internal connections to various points within the Ranger were somewhat
> different then with the earlier Ranger and added keying kit. The power
> transformer, T1, was changed to include the two additional taps to
> connect to the cathodes of the added bias rectifier. The bias rectifier
> now supplied negative voltage to the keyer and also provided modulator
> bias via the T3 center tap. Other wiring and some component changes were
> also done when this "revised" Ranger came to market.
>
> So, if one is really curious about Ranger lineage, relative to added
> keyer circuitry or keyer mod,, you have to look very carefully as to how
> it's connected within the Ranger circuitry.
>
> Pete, wa2cwa
> www.manualman.com
>
>
> On Tue, 15 Feb 2022 04:06:30 +0000 (UTC) Gordon Gwillim via Johnson
> <johnson at mailman.qth.net> writes:
>> I bought the original Ranger that had been built from a kit, in
>> 56. The guy sold it to me for half price. I think he was going after
>> one of the new ones with the grid block keying. This one worked well
>> and kept me out of trouble on the bands for many years. I used it
>> mostly on CW and the keying was not spectacular but when you are
>> young you are just happy to be on the air.
>> The Ranger with the grid block system has two extra taps on the
>> power transformer for the bias rectifier which was part of the added
>> circuitry. I think the change would be worth while but I haven't
>> gotten to it yet.
>> Gordon , VE5UJ
>>
>>
>>
>>
>> On Monday, February 14, 2022, 10:30:17 a.m. CST, Chris Farley
>> via Johnson <johnson at mailman.qth.net> wrote:
>>
>> David there was also a keyer kit for the early version without a T3
>> center tap! I don't remember specifics, but do recall the keyer
>> deck had several large resistors beneath it- likely serving as a V
>> divider.
>> C
>>
>> Sent from Yahoo Mail on Android
>>
>> On Mon, Feb 14, 2022 at 8:53 AM, Dave Harmon<k6xyzdave at gmail.com>
>> wrote: About 30 years ago I acquired by a roundabout way a first
>> version Ranger
>> that had the keyer kit installed.
>> To avoid a looong discussion of how I got involved with that
>> ckt....I can
>> say that the way to determine if the keyer kit was added is to look
>> at T3.
>> The original first version of the Ranger does not have a T3
>> secondary tap
>> from the keyer bias.
>> The next version schematic dated 11-5-54 shows the keyer and T3 tap.
>> I've never been able to find any installation info from the kit for
>> the
>> keyer.
>> I still have this Ranger and plan to service it again soon.....for
>> the 3rd
>> time!
>> There were 3 published schematics for the Maroon colored
>> transmitter, the
>> original had no date, next was 11-5-54, then 10-17-57.
>> Great transmitter.
>> The Ranger ll that had 6m is a different transmitter.
>>
>> 73
>>
>> David Harmon
>> K6XYZ
>> Sperry, OK
>>
>>
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