Bush MB60 tuning dial brass cap - UK Vintage Radio Repair and Restoration Discussion Forum

Vectis68 · 10th Aug 2022, 8:03 pm

I have a couple of these radios, both with the brass cap missing. Can anybody tell me what the diameter of the brass cap is? I have an idea of what I can use as a replacement, I just need to know the size.

Many thanks,

Phil.

Paul_RK · 10th Aug 2022, 9:16 pm

No micrometer to hand, but with a steel rule I make it 2.45cm. The original is as it were straight-sided, ending in a flattened point, rather than smoothly convex as many other knob trims were.

Paul

Goldieoldie · 11th Aug 2022, 3:08 pm

Hi Phil
If you manage to source anything suitable please let me know as I have a mb60 with the same trim missing .Must of been duff glue !
Cheers
Pete

Vectis68 · 15th Aug 2022, 10:20 pm

So I bought a 25mm brass metric cup core plug from Core Plugs International (part number BMC25)

https://coreplugs.co.uk/25mm-brass-cup-core-plug-bmc25

It's a little bit deeper than needed, so I ground it down on a bench grinder and finished it off with a file.

I'm quite pleased with the result, but I don't know how it compares with an original part.

Could I have some feedback please from people who own one of these sets and also have the brass cap.

Phil.

Techman · 15th Aug 2022, 11:05 pm

That looks really good!

Paul_RK · 15th Aug 2022, 11:10 pm

Looks good to me - I think the shape is quite close to that used on the TR82/97 replica. Here are a couple of photos of the cap on a resident EBM60, which perhaps just about bring out - I didn't find it easy to capture - its gently pointed rather than convex form.

Paul

10th Aug 2022, 8:03 pm	#1
Vectis68 Triode Join Date: Jul 2022 Location: Plymouth, Devon, UK. Posts: 10	Bush MB60 tuning dial brass cap I have a couple of these radios, both with the brass cap missing. Can anybody tell me what the diameter of the brass cap is? I have an idea of what I can use as a replacement, I just need to know the size. Many thanks, Phil.

10th Aug 2022, 9:16 pm	#2
Paul_RK Dekatron Join Date: Nov 2003 Location: Fakenham, Norfolk, UK. Posts: 4,259	Re: Bush MB60 tuning dial brass cap No micrometer to hand, but with a steel rule I make it 2.45cm. The original is as it were straight-sided, ending in a flattened point, rather than smoothly convex as many other knob trims were. Paul

11th Aug 2022, 3:08 pm	#3
Goldieoldie Octode Join Date: Jul 2014 Location: Petersfield, Hampshire, UK. Posts: 1,043	Re: Bush MB60 tuning dial brass cap Hi Phil If you manage to source anything suitable please let me know as I have a mb60 with the same trim missing .Must of been duff glue ! Cheers Pete

15th Aug 2022, 10:20 pm	#4
Vectis68 Triode Join Date: Jul 2022 Location: Plymouth, Devon, UK. Posts: 10	Re: Bush MB60 tuning dial brass cap So I bought a 25mm brass metric cup core plug from Core Plugs International (part number BMC25) https://coreplugs.co.uk/25mm-brass-cup-core-plug-bmc25 It's a little bit deeper than needed, so I ground it down on a bench grinder and finished it off with a file. I'm quite pleased with the result, but I don't know how it compares with an original part. Could I have some feedback please from people who own one of these sets and also have the brass cap. Phil. Attached Thumbnails

15th Aug 2022, 11:05 pm	#5
Techman Dekatron Join Date: Nov 2009 Location: Lincolnshire, UK. Posts: 5,000	Re: Bush MB60 tuning dial brass cap That looks really good!

15th Aug 2022, 11:10 pm	#6
Paul_RK Dekatron Join Date: Nov 2003 Location: Fakenham, Norfolk, UK. Posts: 4,259	Re: Bush MB60 tuning dial brass cap Looks good to me - I think the shape is quite close to that used on the TR82/97 replica. Here are a couple of photos of the cap on a resident EBM60, which perhaps just about bring out - I didn't find it easy to capture - its gently pointed rather than convex form. Paul Attached Thumbnails