[Elecraft] Thanks! was :K3: R-MH2 mic problems

[Ken K3IU]

Hi again, John:

I can't figure out what you are doing. I go to CONFIG:PTT-KEY entry; 
rotate VFO A clockwise and one of five selections can be made... 
rts-OFF; dtr-OFF; OFF-dts; OFF-dtr; and rts-dtr. Your selection will 
determine what, if anything, will happen when you assert the rts and/or 
the dtr on the RS232 port. Do you have a connector attached to the RS232 
port on the back? If so, disconnect it and see if you can cause the 
fault.(Manual, pg 52).

73,
Ken K3IU

VE3NFK wrote:
>
> PS - what about the second 'weird behaviour'?
>
>
> VE3NFK wrote:
>   
>> On a separate note  - I have this anomaly that I emailed support on Friday
>> night:
>>
>> "Managed to 'lock-up' my K3  - NO buttons work - including power - had to
>> pull the power plug....
>> going thru the config menu  - at PTT-KEY  both ' OFF-OFF'  tried to change
>> values and complete lockup
>> Completely repeatable  - go to config PTT then  move main vfo control and
>> lock up.
>> Was on AM 13840 listening to a SW station/
>> Changed mode/freq  - still does it - as soon as main VFO adjusted.  "
>>
>> Any advice/help comments?
>>
>> tnxs
>>
>> John VE3NFK
>>
>>
>>
>> Gary Hembree wrote:
>>     
>>> This is a known problem with the Rev B front panel artwork.  I had the
>>> exact same problem with a MH2 mike when I first used my K3/100 SN 729 a
>>> week ago on 6 meters to contact a local friend who is a well-known VHF
>>> and HF DXer and contester.  Unfortunately it did not make a good
>>> impression!  There is a ground trace missing from one end of C98 and C97
>>> on the front panel board.  These capacitors are associated with the mike
>>> bias circuit.  Hence the problem with the MH2.  I am told that an
>>> official Elecraft fix is going to be released this coming week.  Several
>>> of us who noticed this problem were given the fix to try and it worked
>>> three out of three times.  If you must use a mike that needs bias then
>>> use the rear panel connector for now (i.e. Elecraft or Icom Proset). 
>>> MH2s are excluded of course, unless you have an appropriate adapter.  688
>>> is the earliest SN that we know is affected.  The other three were 690,
>>> 728 and 729.  Elecraft is fixing front panel boards now before they ship
>>> anymore.
>>> 73
>>> Gary, N7IR
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>>>       
>>     
>
>