[Elecraft] KSB2 P1 Wiring Questions

[Harvey Howell]

There is a new item from MFJ that people may find helpful when interfacing a 
mic to the K2. Its an MFJ-655 mic equalizer/conditioner/preamp that is 
supposed to interface any mic to just about any rig. It takes two types of 
mic connectors and the jumpering is done in the MFJ-655. You can use the 
standard setup with 2 pin jumper blocks in the K2 and not have to make any 
changes there. I don't have one but I think I will buy it soon. Read about 
it on the MFJ website.

73, Harvey KN6VP

----- Original Message ----- 
From: "Don Wilhelm" <w3fpr at earthlink.net>
To: <n7on at juno.com>; <elecraft at mailman.qth.net>
Sent: Tuesday, April 04, 2006 7:26 PM
Subject: RE: [Elecraft] KSB2 P1 Wiring Questions


> 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
>>
>
> _______________________________________________
> Elecraft mailing list
> Post to: Elecraft at mailman.qth.net
> You must be a subscriber to post to the list.
> Subscriber Info (Addr. Change, sub, unsub etc.):
> http://mailman.qth.net/mailman/listinfo/elecraft
>
> Help: http://mailman.qth.net/subscribers.htm
> Elecraft web page: http://www.elecraft.com
>
>
> -- 
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.1.385 / Virus Database: 268.3.5/301 - Release Date: 4/4/2006
>
> 



-- 
No virus found in this outgoing message.
Checked by AVG Free Edition.
Version: 7.1.385 / Virus Database: 268.3.5/301 - Release Date: 4/4/2006