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Old 16th Sep 2019, 12:54 pm   #1
nightraven
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Default Obscure-ish knob required for a 1960s British guitar pedal

Hi all,

Apologies for the non-existent post-count - I'll be transparent in that I'm not a radio aficionado, but I promise that I have never, and would never harvest germanium transistors from British radios for use in junky guitar pedals!

I'm after a very specific type of knob to complete one of my prized items, and I'd certainly make it worth anybody's while to look through their stash in case they happen to have it.

The dimensions of the knob are very similar to Cliff's K5, which is still being manufactured. A clue underneath suggests that it might, however, have been built in Germany (unless Cliff had some connection there at the time that I'm not yet aware of).

This knob is just over 19mm tall (incl. the silver cap), which makes it noticeably different to the stubbier knobs that were used on the famous Marshall guitar amps at the time.

A similar version of this knob does exist, without the engraved line on top, or the set screw, but these details are (unfortunately) rather important to me.

If anyone has the time to rummage around in their boxes and jiffy bags of knobs, I'd be very grateful!
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Old 16th Sep 2019, 2:22 pm   #2
ColinTheAmpMan1
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Hi and Welcome,

I am not a vintage radio enthusiast either. My main interests are in electric guitar amplifiers and effects, plus test equipment.

Could you tell us what the vintage effect is? It may not add much more help in trying to find a matching knob, but it satisfies the nerd in me.

I wouldn't put too much store by the marking on the knob - Cliff might very well have sourced their knobs from all sorts of places and countries (but I kind-of thought they were a company that made plastic things).

If it was my pedal, I think I might just bite the bullet and replace all of the knobs with Cliff K5s, but that's just me. The knob you show does look very much like some of the knobs used on Marshall amps as well as looking like the Cliff K5.

If you think your search is a toughie, try finding knobs to match those on Coral electric sitars. They exist, but at eye-watering cost! Seventeen quid each, anyone?

Good Luck, Colin.
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Old 16th Sep 2019, 2:24 pm   #3
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Just had a look, sorry, no joy.

Andy.
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Old 16th Sep 2019, 3:03 pm   #4
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

^ Thanks both. I think I'd sooner stick a generic Bulgin chickenhead on before a modern knob

Quote:
Originally Posted by ColinTheAmpMan1 View Post
Could you tell us what the vintage effect is? It may not add much more help in trying to find a matching knob, but it satisfies the nerd in me.
It's for this
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Old 16th Sep 2019, 6:13 pm   #5
mark_in_manc
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

I once had a Rogers Ravensbrook stereo amplifier which had knobs on it that looked very like that - try a google in that direction.
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Old 16th Sep 2019, 6:46 pm   #6
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

ferguson radiogram, transistor, late sixtiesunusual cabinet... as you lower the front flap, part of the top retreats under the other part of the top. Don't know model number/ My parents had one. It had three knobs in just that style, with lines on the top. Not sure if grub screw or push-on

David
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Old 16th Sep 2019, 6:50 pm   #7
nightraven
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Quote:
Originally Posted by mark_in_manc View Post
I once had a Rogers Ravensbrook stereo amplifier which had knobs on it that looked very like that - try a google in that direction.
Well spotted, thanks for that! Seems that the 'Ravensbourne' model came with similar looking knobs too. There's one on eBay too - will poke the seller a bit.

Sometimes you just need a magic keyword to search for. I've just learned that the word in this case is 'Scott'.
Couple of hits on eBay for what appear to be the same brand of knob (the logo and model number is visible underneath). Might shop around for a 'forensically-similar' example though
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Old 16th Sep 2019, 7:12 pm   #8
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

That knob looks very like the ones fitted to Marshall amplifiers. Spares can be purchased from here. https://www.watfordvalves.com/search...&Submit=Search.

They come in different styles e.g. push on splined, push on D shaped and grub screw.

Al
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Old 16th Sep 2019, 9:36 pm   #9
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Quote:
Originally Posted by nightraven View Post
^ Thanks both. I think I'd sooner stick a generic Bulgin chickenhead on before a modern knob

Quote:
Originally Posted by ColinTheAmpMan1 View Post
Could you tell us what the vintage effect is? It may not add much more help in trying to find a matching knob, but it satisfies the nerd in me.
It's for this
What is that thing? A kind of Rangemaster treble booster type thing?
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Old 16th Sep 2019, 10:12 pm   #10
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

The Rogers amp knobs were brown. Not seen a black one.
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Old 16th Sep 2019, 10:48 pm   #11
Alistair D
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

A little bit more information re the pep box.http://wem-owners.com/miscellaneous/pep-box/

Al
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Old 17th Sep 2019, 8:41 am   #12
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

They do seem to be the same as some of the Rogers amps, slightly bulbous, but black with silver trim instead of brown with gold trim. The Cliff K5 looks very similar.
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Old 17th Sep 2019, 11:19 am   #13
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

I seem to recall Coloursound pedals using similar knobs, if not the same.
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Old 17th Sep 2019, 11:25 am   #14
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

The big T have this https://www.thomann.de/gb/tube_amp_d...tish_style.htm
Has the position indicator painted black but I assume that could be removed if necessary.
Delivery would be the only issue though at 10€ (free over 149€) and it's a 20€ minimum spend, although a quick look on their site can become a long look and you can then end up surpassing the free delivery cut off point quite easily.
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Old 17th Sep 2019, 4:26 pm   #15
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Quote:
Originally Posted by stevehertz View Post
I seem to recall Coloursound pedals using similar knobs, if not the same.
They certainly did!

Here's one of mine. The box is actually in better condition than the pedal, although it did get some use when I was lead guitarist in a metal band in the mid 70s. That pedal and its associated 'wah-wah' pedal was all you needed to reproduce the synth noise effect on Hawkwind's Silver Machine with just the guitar
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Old 17th Sep 2019, 5:39 pm   #16
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Thanks all above,

Quote:
Originally Posted by stevehertz View Post
What is that thing? A kind of Rangemaster treble booster type thing?
It's an early fuzzbox from the mid-1960s.

Quote:
Originally Posted by dglcomp View Post
The big T have this https://www.thomann.de/gb/tube_amp_d...tish_style.htm
Has the position indicator painted black but I assume that could be removed if necessary.
Delivery would be the only issue though at 10€ (free over 149€) and it's a 20€ minimum spend, although a quick look on their site can become a long look and you can then end up surpassing the free delivery cut off point quite easily.
Yeah, modern reproductions (incl. Cliff K5) aren't too tricky to find. The ones on Thomann, and the Marshall knobs are all shorter than the K5 (and whatever this German knob is).

Colorsound knobs look very similar, but those I think were made by Cliff at the time. I have a bunch of Colorsound pedals here, and the underside of those knobs looks very different. Not to mention that they're all push-ons, without a marker
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Old 17th Sep 2019, 9:43 pm   #17
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

I would have thought those from Watford Valves in the link in post #8 would have been perfect. You're not going to find originals unless someone has scrapped an old pedal and has saved the knob, or there happens to be some old stock from the original suppliers somewhere. Those Watford knobs are very cheap and certainly look the part, to me anyway.
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Old 18th Sep 2019, 5:11 pm   #18
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

Interpreting the manufacture code (the squiggly thing with numbers in it) that German plastics manufacturers embedded into their parts might lead to some clues. See here:

http://www.wehrmacht-awards.com/foru...d.php?t=986989

Also at the always interesting Plug and Socket museum:

https://www.plugsocketmuseum.nl/German-logos.html


If I read it right, is the code 24 ?? = Gebrüder Merten

Who are still trading as a switch and socket (any maybe in the past, control knob?) maker. Maybe they have some old stock??
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Old 18th Sep 2019, 6:28 pm   #19
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

10/10 for that arcane knob-nerdery - many thanks! That's some excellent detective work. Yep, the company still (sort of) exists. I wonder what their tech support staff will think when they check their emails tomorrow morning. Have also inquired as to whether they hold any sort of archival records about this. It's a pretty long shot, I suppose, but I really didn't expect the knob to be ID'd so quickly
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Old 18th Sep 2019, 10:38 pm   #20
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Default Re: Obscure-ish knob required for a 1960s British guitar pedal

I was thinking the same as mentioned, looks like what's on a Marshall.
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