Call Search
     

New to Ham Radio?
My Profile

Community
Articles
Forums
News
Reviews
Friends Remembered
Strays
Survey Question

Operating
Contesting
DX Cluster Spots
Propagation

Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers

Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net

   Home   Help Search  
Pages: [1]   Go Down
  Print  
Author Topic: Kenwood TM-261A / MC-53DM Microphone  (Read 1937 times)
K0SR
Member

Posts: 37




Ignore
« on: September 15, 2000, 10:30:03 PM »

Please excuse me if I sound a little heated here.  The cheap little plastic locking tab on the cheap plastic RJ-45 connector used on Kenwood's MC-53DM microphone broke off, so it wouldn't stay plugged into the radio.  So, I go to Radio Shack and buy ($6.50) another cheap plastic RJ-45 connector.  I inspected the broken connector to determine the color code, and also verified it with an ohm meter.  I attached the new connector, and had no luck what so ever.  The radio is either in a key-down condition, or it is in scan mode and just keeps clicking through the memories.  I put that connector together and took it apart about 10 times, as far as I can tell it's the same as the original.  After looking at list prices for a replacement microphone (it's outrageous) I think I'd rather keep fighting with this thing and get it working myself.  Anybody else ever go through this ?  The manual has precious little information about the mike or the radio.  Any ideas ?

Thanks

Steve K0SR
Logged
K0SR
Member

Posts: 37




Ignore
« Reply #1 on: September 16, 2000, 09:27:01 PM »

OK, a little progress to report.  It looks like yesterday's difficulties were due to assembly problems with the connector I bought at Radio Shack.  It uses a crimping arrangement to pinch the wires into connections, and hopefiully the insulation gets broken and contact is made.  That doesn't work in practice as well as theory, and the crimp sometimes will short pins together.  I still think Kenwood made a poor decision to use RJ 45 connectors in the first place, but I can work around this if I can get a new connector on the microphone.  I guess the question now is if any one knows of a source of decent RJ-45 connectors ?  The one from Radio Shack is barely adequate.

Thanks !

Steve K0SR
Logged
K0SR
Member

Posts: 37




Ignore
« Reply #2 on: September 20, 2000, 09:55:44 PM »

OK, here's some information I was able to find.  Basically, the
microphone connector Kenwood uses is difficult to replace because they
use stranded wire, and most RJ-45 connectors are designed for solid
wire.  I've decided to replace the whole cable assembly.  First, K3OWX
sells 4 foot long, 8 wire cable assemblies with an RJ-45 connector on
the end.  This would be very useful if you wanted to use a rig with this
kind of connector for Packet and needed to make up a cable.  

A picture of the cable can be seen at:
http://www.geocities.com/k3owx/cable.jpg

If you need the pin-out here is the url:
http://freeweb.pdq.net/medcalf/ztx/wire/index.html

The price is $4.00 for one or $10 for three shipping included.
Please send payment to:
R.E. Merritt
12214 Cleghorn Rd.
Hunt Valley, MD 21030

I also got great response from Kenwood via E-mail, they replied very
quickly with a copy of the Service Manual for the MC-53DM microphone.
The replacement cable assembly is part number E30-3240-08, and they want
$14.56 plus $6.50 shipping.  This is a lot better than spending $90.00
for a whole new microphone ! Their parts distributors:

Pacific Coast Parts     (800) 262-1312
15204 Staff Court       (310) 515-0207
Gardena , CA 90248   Fax(310) 538-4919
Internet: http://www.pacparts.com
E-Mail orders@pacparts.com

8:00AM - 4:30PM PST

East Coast Transistor Parts Inc.  (800) 637-0388
2 Marlborough Road                (516) 483-5742
West Hempstead, NY 11552      Fax (516) 483-5904

9:00AM - 5:30PM EST

I hope this information is useful, and thanks to all who responded to my
earlier message.

73  Steve  K0SR
Logged
AD4JJ
Member

Posts: 1




Ignore
« Reply #3 on: April 01, 2004, 03:37:42 PM »

The modular jack came off, I need the color code and pin out please. I would appreciate it if anyone can help me.

Thanks,
Ron AD4JJ
Logged
AC0Y
Member

Posts: 1




Ignore
« Reply #4 on: December 04, 2007, 06:28:13 PM »

Usually the problem comes from the Cheap Crimp tools that can be had. I have replaced this connector 3 times due to broken cable at the connector and not from broken tabs It happens to everyone I guess. Granted this is not an easy replacment on this cord. It takes me about 5 to 6 minutes to get it right before I crimp but it works every time for me...But I hold my breath until I try it.

73
Logged
N7RSF
Member

Posts: 3




Ignore
« Reply #5 on: November 10, 2008, 06:32:37 PM »

I experienced the same thing with trying to replace the modular jack.  PacParts has the cable listed for $9.56 now...
Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.11 | SMF © 2006-2009, Simple Machines LLC Valid XHTML 1.0! Valid CSS!