I was looking back at some modifications mentioned the forum and was wondering on opinions from those that have tried them. Many were mentioned but there weren't a lot of responses from people who have tried them (unlike our excellent Schottky diode thread).
I've always left Grant's stock for the most part but thought these were interesting.
# 1 Increased modulation all modes
1K series resistor on the middle leg of TR24, and change R124 and R126 to 4.7K
# 2 Motor Mouth HIFI RX Mod
http://www.motormouthmaul.com/linked/cobra 148 rx mod.pdf
# 3 TX HIFI Mod
C46 Change to 2.2uf mylar/polyester film or non-polarized electrolytic
C101 Change to 1.5uf tantalum 16 to 50 volt
C102 Change to a 910pf ceramic disc
C104 Change to 2.2uf tantalum 16 to 50 volt
C108 Change to 1uf to 2.2 uf tantalum 16 to 50 volt
I found that if you have a very deep voice start with 1uf on C108 and work up if need be.
If you need more highs on tx Change C 105 to .001 to .0001uf mylar/polyester film The smaller you go the more highs you get.
I've always left Grant's stock for the most part but thought these were interesting.
# 1 Increased modulation all modes
1K series resistor on the middle leg of TR24, and change R124 and R126 to 4.7K
# 2 Motor Mouth HIFI RX Mod
http://www.motormouthmaul.com/linked/cobra 148 rx mod.pdf
# 3 TX HIFI Mod
C46 Change to 2.2uf mylar/polyester film or non-polarized electrolytic
C101 Change to 1.5uf tantalum 16 to 50 volt
C102 Change to a 910pf ceramic disc
C104 Change to 2.2uf tantalum 16 to 50 volt
C108 Change to 1uf to 2.2 uf tantalum 16 to 50 volt
I found that if you have a very deep voice start with 1uf on C108 and work up if need be.
If you need more highs on tx Change C 105 to .001 to .0001uf mylar/polyester film The smaller you go the more highs you get.
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