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MG TD TF 1500 - Knob for TD dimmer

Gentlemen,

What is your recommendation for a suitable knob for the dimmer shaft in the TD central dash (yellow circle in the photo?

TIA.

Jesús


J Benajes

Something looks odd on your rheostat. I think it may have been replaced. The originals had a flat area that the set screw wrested against.



Christopher Couper

Thanks for the response, Chris.

Maybe this is why I found difficult to source a correct knob from the usual vendors.

Below there is a photo of the rheostat that came with the car, after restoration.

Is this the correct one?

Jesús


J Benajes

Chris, There were two types- screw on and push on (had a spring loaded plunger thingy?). Jesus's is an original screw on type. There is a raised groove that slips into the slot, and the screw into the threaded hole that you can't see. Your picture is of the knob that fits his- fairly sure . The brass washer in the picture is supposed to be behind the panel, not in front. Correct is a flat chrome washer, that may be why it looks odd. George
George Butz

Here's a wild idea:

http://www.youtube.com/watch?v=FjznbLaaf4M
efh Haskell

My 51 TD has two knobs both of which match Jesus' knob to the let, the one with flat lobes. Mine is not a rheostat, just an on/off switch. What is correct for an early TD?
Geoffrey M Baker

My TD from 1950 has only the switches.

W. Müller

TD 1824
1

Jesús, don't we wish we all had 3-D printers! I don't so here's the crude solution that I did for my TD after it turned out that the knob supplied by big supplier was apparently actually for an MGA.

http://www2.mg-cars.org.uk/cgi-bin/gen5?runprog=mgbbs&access=&mode=archiveth&subject=8&subjectar=8&thread=2013071402102618642

Jud

J. K. Chapin

Geoff. 1st Feb 1951. No rheostat just two switches. Cheers
Peter TD 5801

P Hehir

TD7191, early 1951 build, just has two on/off switches, as shown in left switch.
R W Hinton

George: I forgot about the keyway. Also his bezel is rounded over instead of squared off like the picture I posted. I suppose there could be various versions of the bezel, I am just used to seeing the squared off ones.

I think the push on ones with the spring loaded little button were the replacements (maybe also MGA?). These were also longer and had an arrow on the face. I replaced mine at one point and cut down the know to make it the same as the original. Then later I found my original knob and gave it a quick restoration.
Christopher Couper

Chris,You are right about the outer ring being more rounded that square. Suppose it could be a collection of bits? George
George Butz

Thanks for the comments and suggestions.

So it appears that I have on f the correct rheostats but that there are not replacement knobs at least available from the usual suppliers.

I will try to adapt some other knob from another application, as done by Jud.

Jesús
J Benajes

Abingdon Spares 39/39b both new and used.
George Butz

Thanks for the hint George.

I'll give AS a try.

Jesus
J Benajes

This thread was discussed between 22/09/2015 and 25/09/2015

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