[Elecraft] MC-60 microphone

[Joe Subich, W4TV]

According to the schematic, the slide switch on the mic, the "Lock"
switch and the PTT switch are all in parallel.  One would have to
assume that one of the three switches has a moderate resistance when
open (not completely open) that is just low enough to keep the rig
keyed but not low enough to key the rig when plugged in.

I'd start by testing PTT with just the base to eliminate the switch
in the mic itself, then try putting a piece of paper between the NO
contacts of the LOCK switch while operating the PTT, then in the
PTT switch while operating the Lock switch.

Isolating the individual switches should allow you to locate the
source of the problem.

73,

    ... Joe, W4TV



On 2014-11-13 11:47 AM, Phil Wheeler wrote:
> eleMy MC-60 acts similarly. I've taken it apart, cleaned contacts, etc.
> to no avail. I suspect the "for years" part is the issue.
>
> There are some sites which discuss repairing the MC-60. Since I have
> other mics, I've pretty much given up on mine.
>
> Phil W7OX
>
> On 11/13/14 6:54 AM, Leroy Marion wrote:
>> Here is a different problem for K2 gurus:
>>
>>
>>     Using a Kenwood MC-60, when keyed it toggles the K2 into transmit,
>>
>> and won't come out of transmit until you cycle power switch.
>>
>>    Hand mic or Heil  with foot switch works fine.
>>
>> Batteries in or out of MC-60 makes no difference. It worked for
>>
>> Years normally.
>>
>>                                     ???
>>
>>                                                  Leroy AB7CE
>
>
>
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