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

[VE3NFK]

Thanks to Ken and Don - mic is working great - appreciate the extremely
rapid replies guys!

(a case of missing something in the manual)

73  John  VE3NFK

PS - what about the second 'weird behaviour'?


VE3NFK wrote:
> 
> Hi I have sn 709  - I have my Heil HC4 from my TS-2000  8 pin conn - when
> I plug it into the K3 - I hear noise from the MICROPHONE???   
> 
> The 'manual' says:  " to select front or rear panel microphone AND to turn
> BIAS on/off, use the MAIN:Mic SRC menu entry..
> 
> My firmware 1.78 only shows:  MIC SEL      FP.H b1 A5 and I have not
> figured out how to adjust it - the main VFO knob also gives me a choice of
> rP.H and LInE  In   ..
> 
> 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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>> 
> 
> 

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