Picture of How to Make Lost Knobs of Antique Radio
Antique Radios found in Auction site or flea market are hardly maintain their original exterior. Especially tuning or volume knobs often would have been lost. Such radios lacking some parts often trade cheaply. So if you don't strictly stick to originality, you can restore complete receiver economically.

Step 1: Ingredients

Picture of ingredients
Plarepair(TM)(Plastic repair kit) is one of resin casting kit, same as "Super-bond" that is popular for dentists.

This time we are going to use these ingredients:

1) Plarepair (TM) powder (black)
This is 100% acrylic powder.

2) Plarepair(TM) liquid
This is Methyl methacrylate

3) "moulage you" (型取り君›). mold plastics
It is low temperature deforming material, a kind of polyethylene resin.

3) Another old radio's knob for a prototype

4) A new general-purpose knob
It should be about 5mm smaller than prototype knob, and the hole diameter must be match the shaft of VR or rotary switch.

You can buy Plarepair here. And perhaps there are other products similar to it in your country.

JTomM1294 months ago

Love this idea, and you're correct about if you are not a stickler about
getting original (read VERY expensive) replacement parts it keeps the
who restoration effort in saner territories. Just one other suggestion
- polymer clay. It's cheap, ready to mold or hand craft to match other
knobs, and can take on almost any color of finish (something I'm sure
many Steam Punker types already know about). And there is a lot of info
out there on how to make this stuff resemble almost anything. Just
whip it up and bake it (but test the plastic parts for this first - and
maybe use metal knobs as the base). Got a few projects myself to test this out on, maybe an 'iable or two waiting to be written?

altomic1 year ago
awesome. simple but so effective.
I especially liked your weathering detail. Brilliant.
Thank you.
sixsa901 year ago
lol looks easy
Machine1 year ago
Very nicely done and you've solved a big problem among collectors.
Good work! It looks nice.