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IC-735 to LDG Z-100Plus

Dec 15th 2011, 07:09


Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0
Has anyone figured out how to interface the Icom 735 with the
LDB Z-100Plus tuner? I have no specs or schematic on how the
tuner gets band information, assuming it must. Is it compatible
with the band voltage information out of ACC-2 pin 4 connector
on the 735? If so, which of the tip/ring/sleeve connections on the Z-100 goes to what?

Thanx--doug, WA2SAY

Please advise by email:
Dec 15th 2011, 14:34


Super Moderator

Joined: Apr 4th 1998, 00:00
Total Topics: 0
Total Posts: 0

According to the owner of LDG, who posted on a Yahoo forum for LDG auto tuners, the two aren't compatible, but you can still use the tuner by transmitting a carrier and pressing the tune button on the tuner.
K9EQ has a page on how the AH4 tuner works--LDG tuners are designed to be compatible with radios that can drive the Icom AH3/AH4 autotuners.

Zack Lau W1VT
ARRL Senior Lab Engineer

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