[Johnson] Ranger Resistor Needed

Jim jbrannig at verizon.net
Mon Nov 1 18:46:53 EDT 2010


I think you are referring to the Phil Salas, AD5X articles 
http://www.ad5x.com/images/Articles/Ranger%20Mods%20RevB.pdf

I did these to my Ranger several years ago and they are great....

Jim

> You don't really have to replace that resistor if you are willing to do a
> simple modification.  I don't have the details at hand but the overall
> effect is to considerably reduce the power dissipation in the Ranger while
> eliminating the 30K resistor.  I made that change to my Ranger a year ago
> based on information I found on the web.  I'll look it up if you want me 
> to
> but you can probably get the info faster  via Google "Johnson Ranger
> modification".
>
> Don K7FJ
>
>> Brian,
>>
>> Mouser has 30K 20 watt wirewound resistors in a couple of styles.  See
>> http://www.mouser.com/Passive-Components/Resistors/Wirewound-Resistors/_/N-7fx9f?Keyword=30k&FS=True
>> for a couple of stocked styles and they also have a non-stock version
>> on the next page (available in single quantity) via order which will take
>> longer.  DigiKey
>> also has them but they are non-stock with minimum 100 order.
>>
>> Rodger WQ9E
>>
>> ----------------------------------------
>> From: "BRIAN ROBERTS" <k9vky at verizon.net>
>> Sent: Monday, November 01, 2010 8:52 AM
>> To: johnson at mailman.qth.net
>> Subject: [Johnson] Ranger Resistor Needed
>>
>> Hello Gents--
>> I need to replace the 20 watt 30 K wirewound resistor (R15) in my Ranger.
>> I'd like to find a duplicate to due its mounting arrangement.  Supply
>> houses don't carry 30K anymore (25 and 50 are available) and two 15K in
>> series won't fit.  Does anyone on the list have a junker Ranger or a 
>> parts
>> cache with the 30K 20 watter available?  Thanks.  Brian K9VKY
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>
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