John Rumm wrote:
The Natural Philosopher wrote:
robert wrote:
Have acquired an old pedestal drill with a
British Houston Thompson single phase 1/4hp motor
marked KF TD3205 type BS 2408

The motor start capacitor needs replacing but it has no visible
markings on it due to several paint coatings !

With capacitor removed the motor will run with a hand start and I can
hear what I assume is a centrifugal switch clicking on spin up and
spin down.

Any advice on what size capacitor to buy and try ?


IIRC about 2.2uF 450V DC or 250v AC is the approved sort of size. For
a sport of one horsepower motor thing.

There seems to be quit a variation. The one on my 1hp dust collector was
100uF:

http://www.internode.co.uk/SIP/DSCN5328.JPG

bloody eck. Thats biog that is. I did have one lying round on me desk,
but it got 'tidied up'.

It isn't that critical., Its just to 'nudge' the motor in the right
direction. Too small and the motor wont start or may start
backwards..that's all.

http://www.remco.co.uk/products/capa...stud_mount.htm

i'll be buggered everything from 1 to 100uF seems to be available.