Elecraft

KSB2 P1 Wiring Questions

Classic

List

Threaded

5 messages Options

n7on

KSB2 P1 Wiring Questions

Fellow Elecrafters--

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

P.S. Many thanks to Elecraft's Gary and Richard as well as to N6WG and
WB6TQG for their continued assistance with the KSB2, microphones, and
RTTY.
_______________________________________________
Elecraft mailing list
Post to: [hidden email]
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

Don Wilhelm-3

RE: 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: [hidden email]
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

Harvey Howell

Re: KSB2 P1 Wiring Questions

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" <[hidden email]>
To: <[hidden email]>; <[hidden email]>
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: [hidden email]
> 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

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
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

Don Wilhelm-3

RE: KSB2 P1 Wiring Questions

I just wonder why would a K2 owner want to spend good money for one of those
solely to jumper the mic lines. There is a header to do the same thing on
the rear of the front panel. Elecraft designed it so you can interface any
mic to the K2, but I still believe it is easier to re-wire the mic plug as
required.
73, Don W3FPR

> -----Original Message-----
>
> 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.
>
>

Phil Kane-2

RE: KSB2 P1 Wiring Questions

On Wed, 5 Apr 2006 08:22:01 -0400, Don Wilhelm wrote:

>> 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.

>I just wonder why would a K2 owner want to spend good money for one
>of those solely to jumper the mic lines.

But but but.... the MFJ gadget costs in the $150 range. Got to keep
the economy of Mississippi going after the hurricanes....!!

--
73 de K2ASP - Phil Kane

_______________________________________________
Elecraft mailing list
Post to: [hidden email]
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