[Elecraft] Computer-Headset on K2

[Don Wilhelm]

Hodger,

It sounds like you have the K2 microphone configuration jumper wired 
straight across for all pins - and that is not correct for Kenwood wiring.

You must connect mic pin 5 to the +5 volt line (which is across from pin 6)

If the microphone is wired to work with a Kenwood transceiver, you will 
not need an additional bias resistor - it should already be i the 
provided adapter.  But then I do not know the real requirements of that 
microphone, I am guessing that it works like most Kenwood mics that need 
power or bias.

The reason your K2 is acting strangely is because Pin 5 is now connected 
to the FUNC line in the K2 by virtue of your mic configuration header.

73,
Don W3FPR

Holger Doerschel wrote:
> Hello,
> 
> normally I use a Heil Pro-Set with IC-4 and the red Kenwood-adapter for 
> my K2 and for my K3 , too.  Now I decided to buy a cheaper headset for 
> my K2 which I do not use very often.
> 
> I bought a computer-headset which has a modified connector and it should 
> be ready for kenwood-rig-operation 
> (http://www.eurofrequence.de/mikrofone/page2.html ED 5 sw). The 
> microphone is an electrical one, so I settet the jumper 5 on the 
> frontpanel of my K2. I didn't solder a 5.6kohm resistor between pin1 and 
> 6 of the connector because I will solder it at the headset-connector and 
> not on the frontpanel.
> 
> If I connect the new headset the K2 freezes and ELEC is shown on the 
> display. Note: the resisior has not been soldered yet. If I remove the 
> jumper and conect my Heil Proset it works fine.