WARAC Mods by
Removing the Yaesu WARC bands TX disabling modification on FT101 ZD MKII.
( N.B. The Yaesu Mod did not disable the RX for the WARC bands)
The Driver mod works by effectively adding extra capacitance from the lower bands across the coil, so that the WARC bands cannot tune to the required frequency, and no drive is therefore produced for the PA. This Mod removes the extra capacitance and the WARC bands can then tune correctly. There are no adjustments to make after the wiring change.
Takes about 15 minutes and you get three bands Going
A. Turn the FT101ZD over with the front panel towards you. The Driver section is on your Left hand-side half way up.
B. Remove the Driver section metal plate. Two of the lid securing screws will be hidden under some foam.
C. The S1E wafer is next to the PA section, which is at the Left hand side rear. The S1D wafer is in front of this one towards the front on the unit.
D. Identify the 3 BLUE wires and a GREY wire all joined together on a spare hole at the top of the S1E wafer. The Blue wires are connected to the S1D wafer.
For 17m and 30m wires, keep this portion of wires long enough so that they can connect to their adjacent terminals.
1) 30m, 17m and 12m bands are disabled. 2) 17m and 12m bands are disabled. 3) After modification.
(S1D and S1E are located in the driver (12BY7A) plate compartment.)
Mario Chomicz (G8ODE) & Teruhiko Hayashi (JA2SVZ)
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