Alton cycles/rev

[Triton Thrasher]

Anyone happen to know how many AC pulses are produced by one complete turn of the drive pinion on a single phase Alton with the step-down geared drive?

I’m having to use the AC as an electronic rev counter signal.

And it’s not leaking oil at the moment, so I’m reluctant to disturb the thing.

[Triton Thrasher]

Realised it’s something of a minority interest so took it off anyway.

The answer appears to be 24.

Edit: after trying it out, the answer appears to be 12, so far as the rev counter is concerned.

[mikeb]

TT i thought you had one of those ebay HT sensing tachos - did that not work out? (i was thinking of one for my b33)

[Triton Thrasher]

Yes I still have this “matchbox” and it’s working fine.  Have to say it’s working more consistently with the recently fitted Wassell electronic ignition than it was with the magneto. But then the magneto was sneakily becoming faulty.


Now I’m trying for the “twin clock look,” with big round GPS speedo and this tacho.



Speedo


They’re both 85 mm, so a bit bigger than old Smiths 3”.

[Greybeard]

Just curious; how come those pictures don't enlarge when clicked/tapped and how come they don't have a file name?

[Triton Thrasher]

Just curious; how come those pictures don't enlarge when clicked/tapped and how come they don't have a file name?

Shared from Imgur.  I don’t know the reasons.

Link to rev counter on EBay: 
https://m.ebay.co.uk/sch/i.html?_from=R40&_trksid=m4084.l1313&_nkw=131948306435

[duTch]

 

..... The answer appears to be 24.

       
           
 or 42 ??

TT i thought you had one of those ebay HT sensing tachos

I ordered a couple of those but they never arrived, but I did at least get a refund 

 

Just curious; how come those pictures don't enlarge when clicked/tapped and how come they don't have a file name?

 I find that happens a lot, even with various file types; been meaning to ask but seems too complex,  

  oh yeah ** can't help with the Alton

[Triton Thrasher]

I should also apologise for not using Smiths Chronometrics!

[duTch]

 

I should also apologise for not using Smiths Chronometrics!

 

 why .....I'm not rivet counting , and if anyone is ....ahem

[Triton Thrasher]

Bodge of the day.