EEVblog Electronics Community Forum
Products => Test Equipment => Topic started by: Odysseus on October 18, 2013, 05:15:57 am
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I want to restore this B&K Precision Model 1474 scope, and one of the items I need is a replacement knob for the fine adjust on the horizontal control. Anything would do, except the shaft size is 1/16", which turns out to be exceedingly rare/non-existent in my 30 minute escapade across Google, eBay, and various manufacturer catalogs.
I could make do with a 1/8" shaft knob, but it will look off center and I feel like I should at least try finding the correct size replacement.
Any ideas where I could find one? Got one in your junk bins or on a broken piece of equipment?
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Sphere (http://www.sphere.bc.ca/test/) in Canada and Qservice (http://qservice.tv/) in Greece sell parts (including knobs) for old HP and Tektronix equipment. You may be able to find a similar part there, but don't expect it to be cheap.
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It has a strong resemblance to the TRIO CS1650A. Perhaps the knobs are sufficiently similar too.
BK, Trio and Kenwood seemed to share a lot of hardware from my research into CROs
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I feel your pain :( replacing knobs is often the hardest part of any restoration or repair.
As well as checking sphere and qservice have a look around for other scrap 'scopes - a 1/16" shaft seems fairly common for the concentric controls.
Check ebay as well.
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How about making a bushing from a short piece of 1/8" OD, 1/16" ID brass or aluminum tubing?
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How about making a bushing from a short piece of 1/8" OD, 1/16" ID brass or aluminum tubing?
Or 3D printing it, if you wanna feel trendy. ::) A Hack-A-Dy article is almost guaranteed.
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It has a strong resemblance to the TRIO CS1650A. Perhaps the knobs are sufficiently similar too.
BK, Trio and Kenwood seemed to share a lot of hardware from my research into CROs
Trio and Kenwood isn't surprising - they're two names for the same company. Trio used the Kenwood name in the US, to sound more local, and at some point (in the early 80s, I think?) adopted the name internationally as well. At one point the company traded as Trio in Japan, Kenwood in the US and Kenwood-Trio everywhere else, although I think products were only branded as one or the other.
(Actually, having done a bit of digging, the Kenwood name looks like it was more widespread than just the US before they went all-out with it, or alternatively its use was increased in stages -- glancing at the parts listings for my father's 1974 Trio receiver, it suggests the Trio faceplate was used in the UK, Japan and possibly parts of Europe, but the Kenwood version everywhere else -- unless I'm completely misremembering whereabouts on the front panel the model designation is printed!)
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How about making a bushing from a short piece of 1/8" OD, 1/16" ID brass or aluminum tubing?
Or 3D printing it, if you wanna feel trendy. ::) A Hack-A-Dy article is almost guaranteed.
Or just wind some tape around it...