K3 Heavy hum after Upgrade

[CX7TT]

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
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[wayne burdick]

Tom,

I can't think of any reason that the firmware upgrade could have caused
this, but one of our engineers will be contacting you shortly to help
you figure it out.

tnx
Wayne
N6KR

[hidden email] wrote:

> 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....


> ---

http://www.elecraft.com

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[Darwin, Keith]

 
Heavy hum is rare.  Most experience ho hum or heavy sigh after the
upgrade.


:-)


Sorry ...

- Keith N1AS -
- K3 711 -

-----Original Message-----
> I did the 1.87 upgrade and today did the 1.88 ... and found that I
have
> heavy hum on the keying of my MH2....

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[George Cortez Jr]

Make sure the 2 tone osc is set to off

George ne2i

Sent from my iPhone

On May 6, 2008, at 2:10 PM, wayne burdick <[hidden email]> wrote:

> Tom,
>
> I can't think of any reason that the firmware upgrade could have  
> caused this, but one of our engineers will be contacting you shortly  
> to help you figure it out.
>
> tnx
> Wayne
> N6KR
>
> [hidden email] wrote:
>
>> 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....
>
>
>> ---
>
> http://www.elecraft.com
>
> _______________________________________________
> Elecraft mailing list
> Post to: [hidden email]
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com

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