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Maratrac clamshell speaker pins

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PETNRDX
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Joined: Sun Nov 25, 2001 4:00 pm
What radios do you own?: Too many

Maratrac clamshell speaker pins

Postby PETNRDX » Thu Feb 18, 2010 5:03 pm

Can't seem to find the info on the speaker pinout for the clamshell head.
I have the A7 book, thot I had the clamshell book, but no joy.
Anybody remember if it is the same pinout as the Mitrek.
The radio to head cable is already plugged in, so just looking for where the speaker goes.
(this is supposed to be my bench testing accessory group, but apparently I pulled the speaker off)
Steve K.

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wx4cbh
Posts: 337
Joined: Tue Aug 05, 2003 6:01 pm

Re: Maratrac clamshell speaker pins

Postby wx4cbh » Thu Feb 18, 2010 7:19 pm

Let's see, that should be J1001 on the Basic Control Head (HCN4033x, 4034x, 4037x, 4038x)......looking it up now......
OK, for reference, how 'bout:
23 EMERGENCY
24 HUB
25 HUB SW
26 HANDSET AUDIO
27 HUB REF
28 EMERGENCY REF
29 SPEAKER AUDIO HI
31 SPEAKER HI
32 SPEAKER LO

Hope that helped some.
curmudgeon.....and I like it.

PETNRDX
Posts: 818
Joined: Sun Nov 25, 2001 4:00 pm
What radios do you own?: Too many

Re: Maratrac clamshell speaker pins

Postby PETNRDX » Thu Feb 18, 2010 10:56 pm

Thank you that is just what I was looking for and it worked...
Steve K.

Ckulp10
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Re: Maratrac clamshell speaker pins

Postby Ckulp10 » Thu Jan 10, 2013 3:17 pm

This may be a bit different from the original disscussion but I have two maratrac's one 99 channel the other 16 i currently only have the clamshell head WITHOUT scan. The radio turns on fine and i can program it but when either radio recieves i get noise back through the speaker. Its a loud humming. Volume control does not control the humming. volume control does control the audio level though. What would cause this noise? I have the speaker on 31 and 32 as my speaker directs me too. Any ideas?

Ckulp10
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Re: Maratrac clamshell speaker pins

Postby Ckulp10 » Thu Jan 10, 2013 5:55 pm

i see you have the pins listed what is pin 21 i am getting rf back on that pin or just noise i should say

Will
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Re: Maratrac clamshell speaker pins

Postby Will » Sat Jan 12, 2013 1:02 pm

Pin 21 at the control head is Analog Ground. It is the control cable shield tied to pin 2 on the radio end.

This is the low side of the volume control in the head.

SlimBob
Posts: 911
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What radios do you own?: I sold my soul for a Saber.

Re: Maratrac clamshell speaker pins

Postby SlimBob » Wed Jan 30, 2013 12:34 pm

Manual is on Repeater Builder.
Slippery Sal's Saber Shanty! Sorted Simply, stuck in sacks! Standard, SECURENET, and Submersible! Sold in sets of six and seven!

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Bigred
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What radios do you own?: Junk that comes and goes...

Re: Maratrac clamshell speaker pins

Postby Bigred » Wed Jan 30, 2013 5:55 pm

Ckulp10 wrote:i get noise back through the speaker. Its a loud humming. Volume control does not control the humming.


How old are the Maratracs? Very early ones (I'm thinking '91 or '92) had this problem, although the hum was not really loud, and there was a LSB to correct a whoops on one of the boards (was it the audio/squelch or the logic board, jeez I'm getting fuzzy these days).
Lots and lots of watts...


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