[Elecraft] [K3] AF Stage Upgrade, RFC47 not greater than 150 ohms

[Ron D'Eau Claire]

How much less than 150 ohms,  Roger? 
 
The resistance on the K3 used to write and test that procedure is just about
200 ohms, no matter which way the meter leads are oriented. So >150 ohms
seemed a safe value to specify.
 
Since you chose to remove the original choke, did you desolder or clip the
leads?. If you clipped the leads, are you certain one can't short to
something on top of the board (such as the FP shield or the trace that
crosses under the original choke. There's a via right near one of the solder
pads for the original choke.)? If you desoldered the old choke and cleared
the pads,  is are the leads cut short on top of the RF board where they
cannot touch anything?
 
Finally, is the new choke attached to the correct two pads on the bottom? 
 
Ron AC7AC
 
 
 
 

-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Roger Marrotte
Sent: Saturday, November 15, 2008 12:14 PM
To: Elecraft at mailman.qth.net
Subject: [Elecraft] [K3] AF Stage Upgrade, RFC47 not greater than 150 ohms


I received an AF Stage Upgrade kit today.  Installation went well.  I chose
the "remove the old RFC47" method.  When I was done with the RFC47 mod, I
measured the resistance from each side of RFC47 to ground and my meter
showed a value less than 150 ohms.  I measured a value of 104 ohms for each
side to ground.  The installation looks as clean of could be.  I did the AF
out mod, put the radio back together and all seems to be working well.  I'm
wondering if the 150 ohm value mentioned in the manual is wrong?
 
Roger, W1EM

-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://mailman.qth.net/pipermail/elecraft/attachments/20081115/9752329b/attachment.htm