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#Post#: 32--------------------------------------------------
Cobra 142 GTL Clarifier Modification
DIR By: kycbradio
Date: October 5, 2018, 5:36 am
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Cobra 142 GTL Clarifier Modification
1. Remove R187
2. Remove D36
3. Jumper D35
4. Follow the RED WIRE from the clarifier control to the PC
board and UNSOLDER it.
5. RESOLDER this RED WIRE to pin 3 of regulator IC MB3756.
6. Follow the ORANGE WIRE from the clarifier control to the PC
board and UNSOLDER it.
7. RESOLDER this ORANGE WIRE to the PC board ground.
NOTE: The Orange and Red wires may need to be reversed in some
radios for this to work right.
8. Re-align center slot by adjusting CT3.
If all went well and you didn't smoke your radio, you should
slide about 1 Kc up and 4 Kc down.
NEED MORE SLIDE:
Install a 5.6uH choke on the banded end (grounded end) of the
varactor diode D37 or replace D37 with a super diode.
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