[Elecraft] KSB2 P1 Wiring Questions

[Don Wilhelm]

Folks,

My advice on mic wiring - unless you must use the mics with multiple rigs,
wire the mic configuration header for the Elecraft mics, and then change the
wiring at the mic plug to match the Elecraft configuration.

By doing that, it certainly simplifies things a whole lot.  I see no sense
in wiring your Elecraft rig to work with a Yaesu mic (for instance) since
that slaves you forevermore to using the Yaesu mic wiring configuaration.
IMHO, if you have only an Elecraft station, the mic plugs should be wired
for the Elecraft configuration. -- If you must use the mics on multiple
rigs, then yes, I can understand that you might want to use that
manufacturers mic wiring on your K2 so you can connect any mic wired for
that rig, but lacking that, I say, change the mic wiring to the Elecraft mic
wiring and you cannot go wrong.

73,
Don W3FPR

> -----Original Message-----
>
> I've successfully completed the KSB2 module for my K2/100 through p. 16
> in the manual, front panel PCB component installation.
>
> Now it's time for mic configuration, p. 17.  Winding toroids, soldering
> multi-pin connectors and IC's, stuffing capacitors, etc.--those I don't
> mind.  However, when it comes to mic configuration and the possibility of
> fouling up my K2 via an incorrectly-wired 5V line--that's when I get
> jittery.
>
> Here are the details:
>
> 1) Initial mic to be used:  Kenwood MC-60
> 2) Eventual mic to be used:  Radio Shack RS 33-1187 headset
> 3) P1 wiring method:  N0SS's computer plug (thanks for the info on your
> website, Tom) or two-pin jumpers--both are at hand.
>
> After studying the KSB2 manual and reading postings in the Elecraft
> reflector archives, here are some questions:
>
> 1) Several reflector postings mention that for Kenwood settings, just use
> jumpers straight across for all the "Signal" and "Mic pin" connections.
> However, on p. 18 under Kenwood mics, there's a note:  "Do not connect
> pin 5 unless mic has internal preamp,"  and another, "Leave pin 6 of the
> mic unconnected."
>
> I plead ignorance--does the MC-60 have an internal preamp?  If it does,
> according to the manual I should connect signal pin 6 to mic pin 5.
>
> 2) I've read a posting that mentions leaving the bottom slide switch on
> the MC-60 "off."  Done.  Wonder if this negates the warning listed above
> and I should just leave signal pin 6 ("5V") unconnected?
>
> 3) The MC-60 has two impedance settings, 50K and 500--is there a
> preferred setting with the K2?
>
> 4) Any suggestions for wiring an 8-pin female mic plug from the RS
> 33-1187 that'll be compatible with Kenwood P1 settings?
>
> Finally, it's been mentioned before but for those who need it here's the
> Radio Shack part number for a package of ten two-pin jumpers:  276-1512.
>
> 73,
>
> John, N7ON K2/100 S/N 5023
>