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Author Topic: D-104 upgrade  (Read 809 times)
KJ6ETL
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« on: November 07, 2017, 12:52:12 PM »

I converted this old Astatic D-104 microphone to modern standards.
Removed the old electronics and crystal microphone element and the 9V block battery clamp.
installed a microswitch under the bracket and adjusted the lever a bit. I needed to add about 1/4" to the lever in order to make contact with the switch.
Replaced the microphone element and added a speech processor.

The microphone PTT has a nice "click" and is ready for some decent audio.

Check out the video:

https://www.icloud.com/sharedalbum/#B0z5GH8MqpzwRU
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KJ6ETL
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« Reply #1 on: November 07, 2017, 06:58:25 PM »

FIXED THE LINK TO THE VIDEO:

https://www.icloud.com/sharedalbum/#B0z5GH8MqpzwRU
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ZS5WC
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« Reply #2 on: November 09, 2017, 04:15:35 AM »

looks excellent!..

Where did you find the processor circuit?. Huh

73 de William
ZS4L / ZS5WC
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KJ6ETL
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« Reply #3 on: November 10, 2017, 05:54:46 AM »

https://www.ebay.com/itm/Sound-Compressor-Equalizer-to-any-HAM-Radio-transceiver-IC-TS-FT-TEN-TEC/141838917693?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2649
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