Part required to repair

[Alberto]

Australia Made Kenwood chef A703C motor spins ok but only at maximum speed, what part do I need to replace?

[Animal]

don't give us any key info. That site you're posting from is blocked by most folk here.

[Paul]

Maybe around the year 1967 or so ?

Here's a picture.

You would think the speed control would be crude, considering the age.

There's an actual semiconductor shown here. Apparently a capacitor or a triac failure on the board, causes a speed control failure. You would think whatever is behind the knob could be at fault as well.

The board is called a phase control in honour of the triac (a "lamp dimmer" running a motor).

Paul

[Andy Burns]

uk ebay item 111078195861 sounds hopeful?

[The Natural Philosopher]

The Kenwood I fixed didn't have a Triac..some sort of compressible lump of resistive rubber I think.

The good news is that parts were available from Kenwood and the woman I spoke to knew what I wanted more than I did.

I think the Triac came in in 1976.

Certainly in 1967 we were still using mainly germanium transistors and

50V was a big voltage for semiconductors.

Now I know SCRS and some Triacs were available in the 1960s, but I cant recall them being cheap consumer level devices.

[Brian Gaff]

So is it a brushedmotor withe a system like a drill speed controller system then? Most low torque things like fans merely play around with the windings to make the speed different. Brian

[Animal]

ISTR seeing a kenwood a few years ago that used a centrifugal governor, and that's what I'd expect of a 60s machine. Unless the op shows us what the speed control system is, it's not a very useful question.