hear hear!
Thank you JB and you fellow writers for all your cool inputs, that really motivates me! you are great!
Hobbyist greetings from Switzerland
Michel-Claude

Hi Michel-Claude, I recently used a new pair of those same Graupner shafts, which I bought as spares for my Commodore in 1978. I've modified the oilers with tubes, as they were too hard to use without making a mess. I have them fitted in my HSL and they run very smoothly for bushed shafts.

JB

Hi Roy, up till recently I was using my 70s Futaba FP-MCIIB ESC in one of my boats, with modified RX plug (old Futaba G to JR) and it was still running perfectly. Only changed it to a HobbyWing to save a bit of space, as the Futaba was twice the size, plus the extra wiring for the suppression module. All of my old 70s Futaba servos have been converted as well, and all work perfectly (although I don't use them now) (only thing I found was, they tend to center slightly off with the newer TXs, (FM, 2.4) but are still perfectly useable. One thing about the old servos is, they are almost silent, unlike the noisy ones these days. Old stuff was much better made I think, (before it was made in China)

JB

Nice find Michel-Claude, even has the original running gear !

JB

Hello Roy!
Thank you for your good explanations! I think you're right about the old electronics.
I'll buy something new, so there are no pre-programmed problems. . . 😊😊😊
hobbyist greetings
Michel-Cl.

Hi the separate black item is a heat sink for a 2N.... series power transistor. These were typically rated 30 -50 watts. If anyone wants any I have lots of as new NPN power transistors similar to this one.
However the heat sink is there because there is a 0.7 volts drop between the emitter to base junction of the transistor.

May not seem much but with lets say 5 amps shared current between the 2 off Monoperm super electric motors, this gives a 3.5 watts 'wasted' heat which has to be dissipated by the black heat sink. When I say wasted this is battery power that will not get to the motor.

Modern electronics have very little losses through heat and some esc's have no heat sinks on at all now. A few powerful ones have water cooling to get rid of heat.

I read another thread on this posting about sorting out the electronics but this is 4 pin operation and if memory serves this was a centre tapped voltage system and just not worth converting. Best advice is to pass on the item as a bit of history and get new controllers.
I see that the motors have Kardan couplings to the prop shaft, these are interesting as they expand to fit the gap, I do not think they are on sale anymore so take care with them. Boat looks in excellent order though.

Nice to see the old kit! I do have some old stuff but I go out to sail my boats not exercise the electronics, we are in a fit and forget era now, so we can get on and enjoy the boaty bits!
Regards
Roy

Hello Doug,
first I'll start an experiment with an electronic plate with connections to a multiplex. I am convinced that this is worth a test. Otherwise I will rely on a new technology as you mentioned.
I'll get back to you, maybe with a black face after trying. . .
🤣🤣🤣🤣
see you soon on this channel, greetings

Hi „Steveg“,
Thanks, somehow you always find something . . .
Greets Michel-Cl.

Hi M-C,
That's a really ancient Multiplex ESC with separate forward/reverse relay unit you have there.
If you don't have the associated ancient Multiplex TX and RX to go with it I'm afraid you are up the proverbial creek without the necessary electronic paddle🤔
Send it to Colin for his vintage display and fit a modern ESC.
Commodore looks in pretty good nick to me 👍 Nice find.
Cheers, Doug 😎

Sorry, cannot help but just want to say that's a nice find !