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Sets, Parts and Service Information Wanted (private buyers only, no swaps) If you need help obtaining components, sets or equipment, post a message here. Private buyers only - no traders. No swaps.

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Old 19th Sep 2019, 9:49 am   #21
donutty
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Join Date: Aug 2010
Location: Sheffield, South Yorkshire, UK.
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Be aware that Merten may have simply made that plastic piece and sent it onward to the actual knob maker, who put on a silver cap and a grub screw. But unlikely.

However it does give us some more to work on in helping to pinpoint the source of the control knob - 'West Germany' existed from 1949 to 1990 (wikipedia) and the MPAD (German plastic moulding) marks were said to be in use up the 1960s (https://www.nonstopsystems.com/radio...iber-tubes.htm) From what era is the equipment that it is fitted to??


Can you provide a detailed photo of that marking? Otherwise we may well be barking up the wrong trees

For example, it could be read as Z4 which is made by Paul Kubbler of Wipperfürth:

https://www.nonstopsystems.com/radio...codes-1954.pdf

Also of West Germany, so both Merten and Kubbler are plausible depending on the actual reading of that code.
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Old 19th Sep 2019, 9:53 am   #22
Peter.N.
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Location: Charmouth, Dorset, UK.
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Radiospares used to make similar knobs but with parallel sides, don't know if RS make anything similar now.

Peter
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Old 19th Sep 2019, 9:06 pm   #23
nightraven
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Join Date: Aug 2019
Location: Manchester, UK.
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Quote:
Originally Posted by donutty View Post
Be aware that Merten may have simply made that plastic piece and sent it onward to the actual knob maker, who put on a silver cap and a grub screw. But unlikely.

However it does give us some more to work on in helping to pinpoint the source of the control knob - 'West Germany' existed from 1949 to 1990 (wikipedia) and the MPAD (German plastic moulding) marks were said to be in use up the 1960s (https://www.nonstopsystems.com/radio...iber-tubes.htm) From what era is the equipment that it is fitted to??


Can you provide a detailed photo of that marking? Otherwise we may well be barking up the wrong trees

For example, it could be read as Z4 which is made by Paul Kubbler of Wipperfürth:

https://www.nonstopsystems.com/radio...codes-1954.pdf

Also of West Germany, so both Merten and Kubbler are plausible depending on the actual reading of that code.
Thanks! I did wonder whether it was a 'Z', but didn't see Kubbler on the (rather small) sample of lists I looked at. Good catch - I think you're right. I'll take a proper photo in some natural light tomorrow afternoon.
Sadly Merten got back to me with nothing at all.

This knob was used on a guitar pedal built in London, in 1965.
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Old 20th Sep 2019, 9:44 am   #24
donutty
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Not cheap but I think this will get you started..

https://www.ebay.com/itm/HH-Scott-22...AAAOSw1pddUw2K

or

https://www.ebay.com/itm/HH-Scott-22...-/153359210772

Used on HH Scott hi-fi amps and some Marshall guitar amps.

They are made by the same 'Z4' manufacturer out of Bakelite. Very slightly different detail on the bottoms but they are the real deal.
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Old 20th Sep 2019, 9:45 am   #25
donutty
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Location: Sheffield, South Yorkshire, UK.
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

See also https://www.audiocircle.com/index.php?topic=140882.0
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