[Johnson] Ranger Resistor Needed

Don Ehrlich ehrlich at clallambroadband.com
Mon Nov 1 12:57:23 EDT 2010


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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