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Author Topic: Mic Wiring  (Read 1293 times)
KE4IZA
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Posts: 240




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« on: February 03, 2010, 02:17:36 AM »

I have a new Astatic 636L hand mic and need to know if anyone casn assist me in wiring it to a TS-530S.

The mic has 8 wires and the TS-530S has a 4 pin mic jack.

Thanks
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KB9CRY
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Posts: 4283


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« Reply #1 on: February 03, 2010, 05:11:47 AM »

The manual has the pin-out for the radio and yoiu should be able to find the wiring diagram for the mic on the Internet.  You'll only use four of the eight wires.
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WA3SKN
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Posts: 5496




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« Reply #2 on: February 03, 2010, 05:11:48 AM »

Not quite so simple.
The Astatic is a 200 ohm low impedance mic, and the rig will accept 500-50K ohms... you will need to better match impedances and probably adjust levels.
It can be done.., though.
73s.

-Mike.
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W8NF
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Posts: 53




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« Reply #3 on: February 03, 2010, 01:19:38 PM »

Actually, it really is that simple.

What Astatic "did wrong" was to bother telling you the genuine output Z of the mic.  Most microphone specs, when they list "impedance" are listing the impedance of the microphone input you intend to drive.  Audio applications do not "match" impedances, rather you intentionally want a low-Z to drive something higher, typically 2X to 10X the Z.

If you measure the output Z of a "600 ohm" microphone, it usually measures between 50 and 200 ohms.

The Astatic data sheet specifies the mic's output Z to be 200 ohms and further states it is "intended to drive 50 to 1000 ohm inputs".

The extra wires on the mic are simply because the PTT switch is a full DPDT switch - for the TS-530, you'll only require to use two of those six PTT wires.  Plus the mic audio wires (2).

Dave W8NF
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KE4DRN
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Posts: 3729




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« Reply #4 on: February 03, 2010, 04:06:56 PM »

hi James,

please join other ts-5xx/8xx fans at

http://groups.yahoo.com/group/TS-520_820_530_830/

we also have a sister group kenwood mics

http://groups.yahoo.com/group/KenwoodMics/

73 james
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KE4IZA
Member

Posts: 240




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« Reply #5 on: February 06, 2010, 08:15:24 AM »

Dave

         So you are saying that the Astatic 636L 200 ohm mic which will match 50 ~ 1000 ohms should work becuase the TS-530s wants 500 ~ 50,000 ohms and 1000 ohms is above the 500 ohm minimum requirement?  Am i understanding you correctly.  If so this would be great as this mic is a very heavy duty mic.

Thanks for all your assistance

73

Jim - ke4iza


Actually, it really is that simple.

What Astatic "did wrong" was to bother telling you the genuine output Z of the mic. Most microphone specs, when they list "impedance" are listing the impedance of the microphone input you intend to drive. Audio applications do not "match" impedances, rather you intentionally want a low-Z to drive something higher, typically 2X to 10X the Z.

If you measure the output Z of a "600 ohm" microphone, it usually measures between 50 and 200 ohms.

The Astatic data sheet specifies the mic's output Z to be 200 ohms and further states it is "intended to drive 50 to 1000 ohm inputs".

The extra wires on the mic are simply because the PTT switch is a full DPDT switch - for the TS-530, you'll only require to use two of those six PTT wires. Plus the mic audio wires (2).

Dave W8NF
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KJ4DAQ
Member

Posts: 19




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« Reply #6 on: February 06, 2010, 10:33:33 AM »

Hope visiting this website may help you.

http://homepage.ntlworld.com/rg4wpw/date.html

73
Sridharan
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