tk-730/630 DB mic audio issue

[n3qam]

I am having issues with my mic audio on my 730 in this combo. Using the standard Kenwood hand mic , my audio on the 730 is extremely weak , but on the 630 side, the mic audio is great. Now if i switch to a kmc-9 desk mic , the audio is great on both the high band and low band sides. At first I thought I had a bad mic , so i tried another one and same issue.

Why would the audio on the 730 be extremely low and great on the 630 with the hand mic, but with the desk mic , the audio is good on both radio's .

Is it possible the the gain settings in the 730 are low , but with the lower impedance desk mic it makes up for it ?

could it possibly have something to do with the svr2000 that is also in the mix here ?

 

[ramal121]

The desk mic puts out more mic drive especially if you talk right into it. You might need to bump up the sensitivity in the 730 to make the palm mic play. There should be a pot for this although I'd have to look in the book to see where that is.

If the Pyramid is hooked to the 730, it could possibly be loading down the mic line. Can you just unplug the SVR and check to see if there is a difference?

 

[n3qam]

They pyramid is plugged into the 630 , I unplugged it and the audio did not change . I am guessing that the more drive fro mthe deck mc is due to the lower impedance mic , I have been searching for a service manual or something that shows where the audio level adjustment is , and can't find it . That is my best guess. I m going to try another set of cross over cables and contrl head cable to make sure it is not the issue.

 

[n3qam]

Got it fixed. In the control head cable on the radio side , the black pin was pushed out of the molex connector and not making connection , I reseated the pins and audio came right up .....


Thanks for the help