RPM transducer / Speed Switch

knapmann · Post by **knapmann** » Sun Mar 28, 2021 7:13 pm

Just testing the water, mine is dead I have tried to fix it, I'll have another attempt soon, but in the meantime thought I would see if anyone has one going, ideally a known good one. Mine has 4 pins in an "L" shape on the bottom. (not sure if later ones are different)

impmad2000 · Post by **impmad2000** » Sun Mar 28, 2021 9:10 pm

The transistors should all be replaced as the legs rust. But also the relay soldering very often is dry and fractured. Reflow the soldering to the relay legs too

Alan @ CanfordClassics · Sun Mar 28, 2021 9:36 pm

If Tim will take it, it could be fixed. I had a sort in the work shop today and found 18 of these! Ok

knapmann · Post by **knapmann** » Mon Mar 29, 2021 9:03 am

impmad2000 wrote:The transistors should all be replaced as the legs rust. But also the relay soldering very often is dry and fractured. Reflow the soldering to the relay legs too

Alan @ CanfordClassics wrote:If Tim will take it, it could be fixed. I had a sort in the work shop today and found 18 of these! Ok

Thanks guys

I found a couple of the transistor legs corroded so I replaced them. I also re-flowed all the solder on the back. It still doesnt work

I plan to next replace the diodes. If this doesnt work then I dont think there is much more I can do with it.

Could I buy one off you Alan if I cant get this working?

DDK - Die Deutschen Klassiker

RPM transducer / Speed Switch

RPM transducer / Speed Switch

Re: RPM transducer / Speed Switch

Re: RPM transducer / Speed Switch

Re: RPM transducer / Speed Switch