[Elecraft] 40 & 60 meters K2 #5266

[H. Cary III]

Tom-
  I hate to bother you again but I've encountered another glitch.  After I located the problem on 40 meters with your Cheap 'N Dirty Signal tracing (very effective!), everything aligned perfectly on all bands.
   This weekend, I installed the 60 meter and 160 meter mods and when I powered up my K2 recognized both - that was the good news.  The bad news is I can hear no signals on 40 meters and only hiss on 60 but I am clueless as to whether there are any signals on that 60 meter band since its so new (all I hear is a loud hissing and the same on 40 meters).
   I hooked up my DMM to R30 and get a steady 7.95 volts (a bit above the 7.5 max in the manual but within 10%...the voltage does not change whether I am on 7000, 7300, 5300 or 5450....it doesn't budge - a steady 7.95 volts
   I tried aligning L30 on transmit and can't get above .3 volts on the power meter (that's "point 3" volts).  Aligning L30 on receive is equally as disappointing - the audio his doesn't vary in intensity at all.
   On 160, my receive antennna (R ant) menu is on "off" so that's not an issue.  I hear signals on 160 and the voltages on alignment are 1.85 volts at 1800 Mhz and 6.85 at 2000 Mhz.  I'm fairly confident the 160 mod is not the problem (but next time I'll install one mod at a time and align before doing the next!  But I did have to take the heat sink off to install both so it made sense at the time).
   I have checked J15 and I have continuity between pins 1 and 3 (that replaced C-6 which was my original problem with being deaf on 40 meters).
   At this point, I'm tempted to remove the 60 meter mode and replace some RF Board components to put it back to the original state but I hate to throw in the towel so easily.
   Have you any ideas?
   73,
   Cary, K4TM  K2 #5266

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From: H. Cary III
Sent: Fri 2/17/2006 11:20 PM
To: Tom Hammond
Cc: rbglsg at yahoo.com
Subject: RE: K4TM K-2 deaf...no wonde!


Tom-
    I just substituted a 5pF NPO from W4QE's "junk" box of parts and my K-2 now has ears...thanks again for all your help...tomorrow I'll work on the receiver alignment...even without it my K-2 sure does sound good!!
   Thanks again for all your help.
   73,
   "H" Cary,  K4TM

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