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- MC85.3
- Not only that, I was
- not able to function the S-201 (mic selector of the MC-85) if
- I was connecting more than one rig to the MC-85. At first I
- thought my MC-85 is malfunctioning, but from talking with
- five other hams in Israel who own the MC-85, I heard that
- they all suffer the same problems!!
- The main problem was caused because of a ground loop. There
- were two (2) grounds to ECM unit (you know it's illegal).
- The ground on the p.c. near the Q1 transistor is absolutely
- fine, but what about the one that makes a ground connection
- between the ECM unit and the top of the goose neck? The
- solution is described on the enclosed paper marked (1). The
- addition of (2) and (3) were needed to give more R.F.
- attenuation to the common mode and to the differential mode
- rejection respectively.
- CONTINUED IN FILE MC85.2
-