Go Back   WorldwideDX Amateur Radio Forums > Amateur Radio Related > VHF/UHF Bands and VHF/UHF Rigs


Amateur Callsign Lookup
Enter Callsign:

Kenwood TM-742a problem

Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 09-28-2011, 10:33 PM
Junior Member
iTrader: (0)
 
Join Date: Sep 2011
Posts: 2
nick1169 is on a distinguished road
Default Kenwood TM-742a problem


I recently recived this kenwood unit and the problem that I am having is there is no voice in the TX. SWR and power output is good just nothing to be heard on the other end but a dead key. Any help would be great. Thanks in advance.

Nick


Reply With Quote
  #2  
Old 10-04-2011, 01:06 PM
Junior Member
iTrader: (0)
 
Join Date: Sep 2011
Posts: 2
nick1169 is on a distinguished road
Default

I have also found that the keypad on the mic is not lighting up. And to clarify what i have above, the radio will tx but there is not modulation. Thanks again in advance for any help.

Reply With Quote
  #3  
Old 10-05-2011, 01:51 PM
Junior Member
iTrader: (0)
 
Join Date: Feb 2011
Posts: 14
remote1 is on a distinguished road
Default

My first thought was that you burned something up from someone transmitting without an antenna connected, but now you say it will transmit -it may be your mic that is bad. The 642/742/942 Kenwoods were known to have the mic buttons go out. You can open it up and re-solder a new push to talk button or just replace the mic.
I have replaced several push to talk buttons in the last few years, it is simple if you have basic soldering skills.
You may want to borrow a friends mic first and try it and see if that is you problem.
Good luck, it a great radio don't just shelf it.

Reply With Quote
  #4  
Old 10-27-2011, 08:01 PM
Junior Member
iTrader: (0)
 
Join Date: Oct 2011
Posts: 1
scruffypatch is on a distinguished road
Default FT-742A Audio Problem

Just bought a FT-742A with the same problem. Found that the 8 V DC (actually around 6 V on another 742 I have) that feeds the mic was missing. Opened the mic and found there was around 4 V for the key pad and the other mic functions on one of the other pins so I jumped that voltage over to the 8 V line. The lower voltage seems to work ok. You have to follow the color of the mic cord wires to find where they go. The 8 V line is suspose to be on pin 2 looking at the front of the plug in the 742.
Hope this helps.

Reply With Quote
Reply

Bookmarks
Worldwide Radio Forum



Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Circuit Improvements and Maintenance Procedures for the TS-830S AudioShockwav Kenwood 1 08-18-2011 10:28 AM
Circuit Improvements for the TS-440S AudioShockwav Kenwood 0 08-17-2011 11:34 AM
KENWOOD TM241 PROBLEM ve3mud VHF/UHF Bands and VHF/UHF Rigs 0 02-13-2010 08:36 PM
kenwood tk-840 problem GLR VHF/UHF Bands and VHF/UHF Rigs 6 02-05-2008 08:05 PM
Kenwood TS-440s Problem JustinDePolis2 HF Bands and HF Rigs 3 12-13-2004 09:37 PM


All times are GMT -7. The time now is 06:27 AM.


Powered by vBulletin®
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.0
Worldwide Radio Forum