Cast it in epoxy putty, then polish.
That is what I did for my Kenwood set, it was in storage in an open area before I got it, and rodents had been at it.
You can add some black oxide for color.
Use Plaster of Paris as the pattern, oil as release agent, ordinary abrasive paper to finish.
That was with a partly gnawed button.
Totally missing, do it in parts, building up layers.
That is what I did for my Kenwood set, it was in storage in an open area before I got it, and rodents had been at it.
You can add some black oxide for color.
Use Plaster of Paris as the pattern, oil as release agent, ordinary abrasive paper to finish.
That was with a partly gnawed button.
Totally missing, do it in parts, building up layers.
Scour the web for junked-for-parts NAD ?
Be inventive like @NareshBrd suggests above...or even forego a 'square button' and craft your own customised one.
Or enlarge the fascia hole and install another...
https://www.audiophonics.fr/en/push-button-c-454.html
Be inventive like @NareshBrd suggests above...or even forego a 'square button' and craft your own customised one.
Or enlarge the fascia hole and install another...
https://www.audiophonics.fr/en/push-button-c-454.html
NAD was not a mass market brand, buying one for the button is a big waste, I think.
J B Weld, M-Seal, Araseal and so on are well known putty brands, most are dark grey or off white in color.
Regular, fast sealing, water proof, and other varieties are sold.
M-Seal is cheap, 20 Rupees (25 US cents) for 50 grams regular variety....
I had some sticker release paper, so it cleaned the button, applied it in place, and left the paper as a release agent.
I got a smooth surface after it set, and the corners needed filing, then a touch if fine paper to get the chamfers and so on.
I used what was at hand, much less effort and cost compared to finding the button for a 1988 Kenwood equalizer, which is a rare item in India.
Kenwood never sold this in India, it was brought in from somewhere as a personal import, and ended up as a donation to a church...the Father let me have it, as I had helped him in lighting his school.
Your choice, and consider the cost delivered at your door.
J B Weld, M-Seal, Araseal and so on are well known putty brands, most are dark grey or off white in color.
Regular, fast sealing, water proof, and other varieties are sold.
M-Seal is cheap, 20 Rupees (25 US cents) for 50 grams regular variety....
I had some sticker release paper, so it cleaned the button, applied it in place, and left the paper as a release agent.
I got a smooth surface after it set, and the corners needed filing, then a touch if fine paper to get the chamfers and so on.
I used what was at hand, much less effort and cost compared to finding the button for a 1988 Kenwood equalizer, which is a rare item in India.
Kenwood never sold this in India, it was brought in from somewhere as a personal import, and ended up as a donation to a church...the Father let me have it, as I had helped him in lighting his school.
Your choice, and consider the cost delivered at your door.
Hi I am afraid you can not find an original knob anymore that is still OK. As the switch itself also will fail within time (they are known for that) replacing it completely for a new mains switch with attached square knob is a possibility. Make sure to choose a double pole type that can handle the voltage and current.
I think I used a non illuminated Marquardt push button type for that in the past (1661.0101). If you cover the front cover with tape and use a 2.5 mm drill predrilling the outline and a file you can do wonders. Here an example of a larger 20A rated illuminated 1835 rocker type switch in a cast aluminium casing.
I think I used a non illuminated Marquardt push button type for that in the past (1661.0101). If you cover the front cover with tape and use a 2.5 mm drill predrilling the outline and a file you can do wonders. Here an example of a larger 20A rated illuminated 1835 rocker type switch in a cast aluminium casing.
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In this thread someine has a 3d model for a square button for a nad 3220, it might be the same button.
https://www.diyaudio.com/community/threads/nad-3220-buttons.395094/#post-7288235
https://www.diyaudio.com/community/threads/nad-3220-buttons.395094/#post-7288235
Thank you for an advice! It is the good solution but I'm looking for an original look.
Haven't found a good 3D copy yet.