Hi Steve,
I have the FT-101E but have never heard of the ES.? I checked online to see if any schematics were available but did not locate one.? I did find out the below information about it.? Maybe that's why I'm not finding any documentation on it.? It looks to have been manufactured in the late 70's.? Since you have three tubes your transceiver must have been modified for more power output.? I assume that the input power was changed from 100VAC to the US 120VAC requirement.? Using your VOM you could measure the supply voltages.? A schematic from another model might help verifying if your unit is close to that to determine voltages.? The unit is old enough that you may have high ESR, leaking capacitors throughout.? That should be an easy check to measure some of the smaller caps with an ESR meter and you can do it in circuit as long as the caps have been discharged before measuring.? You mentioned working on these units before, so you probably know all this.? I'm not an expert but plan on powering up my 101E but using a dim bulb tester I need to build.? I bought my Yaesu it the late 70's and would hate to see any smoke as most parts are obsolete.??
Good luck and let us know how it goes.
- The?FT-101ES?was a special FT-101E model for the Japanese market only with a single 6JS6C tube and 50-watt output.
Dan
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73, KK7JNR
