[Elecraft] K3 Heavy hum after Upgrade

[cx7tt at 4email.net]

Hello,
I did the 1.87 upgrade and today did the 1.88. I did not work any ssb 
after doing 1.87 but today saw some posts concerning ssb output to drive 
amps, etc. Sooo, I decided to check it out and found that I have heavy 
hum on the keying of my MH2. I am set for FP.L with bias....I initially 
had the microHam MKset up with MH2 going into the back of the MK (has 
several snap on chokes from my O II days) and when keying the mike I 
without saying anything, I get heavy hum and 8 bars of ALC; CMP flickers 
with about 4 to 5 bars...MIC is set at 20 and CMP at 20 (worked ok in 
the past). With CMP at 0, I still get 7 bars of ALC just by keying the 
MH2. I can hear the hum when the MIC is anything above 3. I took the MK 
out of the circuit...disconnected from computer and exited the 
router....MH2 is plugged directly into front panel and all previous 
problems still exist...Suggestions?
Is there a way to re-load 1.87 or even 1.86?
73
Tom
CX7TT