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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Knob for multiturn control
I have a spectrophotometer with a wavelength adjustment like this:
http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg but I'm missing the black (in this photo) knob. It must have been accidently lost before I acquired the device - the knob is easily removed so the calibration can be adjusted. Does anyone have an extra knob kicking around or know where to obtain just the knob? Thanks. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#2
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"Sam Goldwasser" wrote in message ... | I have a spectrophotometer with a wavelength adjustment like this: | | http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg | | but I'm missing the black (in this photo) knob. It must have been accidently | lost before I acquired the device - the knob is easily removed so the | calibration can be adjusted. | | Does anyone have an extra knob kicking around or know where to obtain just the | knob? Mouser.com amongst many others. N |
#3
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"NSM" writes:
"Sam Goldwasser" wrote in message ... | I have a spectrophotometer with a wavelength adjustment like this: | | http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg | | but I'm missing the black (in this photo) knob. It must have been accidently | lost before I acquired the device - the knob is easily removed so the | calibration can be adjusted. | | Does anyone have an extra knob kicking around or know where to obtain just the | knob? Mouser.com amongst many others. Sorry if I missed where in their catalog it might be. They have the Vishey multiturn assemblies but I don't see knobs sold separately. This is not just some common knob for a 1/4" shaft. It snaps onto a large outer shaft that has set screws to permit the relationship of the dial and pot or whatever is being turned, to be calibrated. Thanks. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#4
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"Sam Goldwasser" wrote in message ... | Sorry if I missed where in their catalog it might be. They have the | Vishey multiturn assemblies but I don't see knobs sold separately. This is not | just some common knob for a 1/4" shaft. It snaps onto a large outer shaft | that has set screws to permit the relationship of the dial and pot or | whatever is being turned, to be calibrated. I assumed you'd replace the whole assembly. Hard to imagine you could buy parts for this these days. N |
#5
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"NSM" writes:
"Sam Goldwasser" wrote in message ... | Sorry if I missed where in their catalog it might be. They have the | Vishey multiturn assemblies but I don't see knobs sold separately. This is not | just some common knob for a 1/4" shaft. It snaps onto a large outer shaft | that has set screws to permit the relationship of the dial and pot or | whatever is being turned, to be calibrated. I assumed you'd replace the whole assembly. Hard to imagine you could buy parts for this these days. Let's see.... Cost of new assembly: $20+S&H. Cost of knob? It's probably available because I'm probably not the first one to have come across a device without it. There is nothing wrong the thing, that knob is desiged to snap off so the calibration can be adjusted. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#6
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"Sam Goldwasser" wrote in message ... | Let's see.... Cost of new assembly: $20+S&H. Cost of knob? It's probably | available because I'm probably not the first one to have come across a | device without it. There is nothing wrong the thing, that knob is desiged | to snap off so the calibration can be adjusted. Tell me about it. But, 40 years ago I fixed IF transformers on tube radios by repairing the coil inside. Now I can't even find most parts I am used to using! In fact, see http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5742751285 for the way things are now!! Maybe Mouser has a suggestion? Or try the maker? N |
#7
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"NSM" writes:
"Sam Goldwasser" wrote in message ... | Let's see.... Cost of new assembly: $20+S&H. Cost of knob? It's probably | available because I'm probably not the first one to have come across a | device without it. There is nothing wrong the thing, that knob is desiged | to snap off so the calibration can be adjusted. Tell me about it. But, 40 years ago I fixed IF transformers on tube radios by repairing the coil inside. Now I can't even find most parts I am used to using! In fact, see http://cgi.ebay.com/ws/eBayISAPI.dll...tem=5742751285 for the way things are now!! Maybe Mouser has a suggestion? Or try the maker? Yeah, something like that, or just live with it. Thanks. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#8
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"Sam Goldwasser" wrote in message ... | "NSM" writes: | Maybe Mouser has a suggestion? Or try the maker? | | Yeah, something like that, or just live with it. I know there's now an active trade in Heathkit knobs because apparently the accountants ordered all the dies destroyed when they closed the kit lines. Neil |
#9
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"Ross Herbert" wrote in message
... On 07 Jan 2005 09:31:00 -0500, Sam Goldwasser wrote: "NSM" writes: "Sam Goldwasser" wrote in message ... | I have a spectrophotometer with a wavelength adjustment like this: | | http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg | | but I'm missing the black (in this photo) knob. It must have been accidently | lost before I acquired the device - the knob is easily removed so the | calibration can be adjusted. | | Does anyone have an extra knob kicking around or know where to obtain just the | knob? Mouser.com amongst many others. Sorry if I missed where in their catalog it might be. They have the Vishey multiturn assemblies but I don't see knobs sold separately. This is not just some common knob for a 1/4" shaft. It snaps onto a large outer shaft that has set screws to permit the relationship of the dial and pot or whatever is being turned, to be calibrated. Precisely what are the details of the shaft on which this knob must fit? One would imagine that if this is not your standard run-of-the-mill 1/4 inch shaft then this info is vital before anyone can suggest a source. Unless everyone is familiar with the particular potentiometer they don't know what the shaft looks like. Sam, That looks like a Spectrol style turns counting dial. See Mouser catalog page 429 http://www.mouser.com/catalog/620/429.pdf, Part No 594-15111 and see if that is the one you're looking for. Surplus Sales also lists one at http://www.surplussales.com/ShaftHardware/ShaftH-2.html. Cheers!!! -- Dave M MasonDG44 at comcast dot net (Just subsitute the appropriate characters in the address) Never take a laxative and a sleeping pill at the same time!! |
#10
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Ross Herbert writes:
On 07 Jan 2005 09:31:00 -0500, Sam Goldwasser wrote: "NSM" writes: "Sam Goldwasser" wrote in message ... | I have a spectrophotometer with a wavelength adjustment like this: | | http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg | | but I'm missing the black (in this photo) knob. It must have been accidently | lost before I acquired the device - the knob is easily removed so the | calibration can be adjusted. | | Does anyone have an extra knob kicking around or know where to obtain just the | knob? Mouser.com amongst many others. Sorry if I missed where in their catalog it might be. They have the Vishey multiturn assemblies but I don't see knobs sold separately. This is not just some common knob for a 1/4" shaft. It snaps onto a large outer shaft that has set screws to permit the relationship of the dial and pot or whatever is being turned, to be calibrated. Precisely what are the details of the shaft on which this knob must fit? One would imagine that if this is not your standard run-of-the-mill 1/4 inch shaft then this info is vital before anyone can suggest a source. Unless everyone is familiar with the particular potentiometer they don't know what the shaft looks like. It's probably unique to that multiturn dial, has nothing to do with the potentiomenter or whatever it drives. Likely only available from Vishay or whowever makes it for them. Thanks. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#11
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"DaveM" writes:
"Ross Herbert" wrote in message ... On 07 Jan 2005 09:31:00 -0500, Sam Goldwasser wrote: "NSM" writes: "Sam Goldwasser" wrote in message ... | I have a spectrophotometer with a wavelength adjustment like this: | | http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg | | but I'm missing the black (in this photo) knob. It must have been accidently | lost before I acquired the device - the knob is easily removed so the | calibration can be adjusted. | | Does anyone have an extra knob kicking around or know where to obtain just the | knob? Mouser.com amongst many others. Sorry if I missed where in their catalog it might be. They have the Vishey multiturn assemblies but I don't see knobs sold separately. This is not just some common knob for a 1/4" shaft. It snaps onto a large outer shaft that has set screws to permit the relationship of the dial and pot or whatever is being turned, to be calibrated. Precisely what are the details of the shaft on which this knob must fit? One would imagine that if this is not your standard run-of-the-mill 1/4 inch shaft then this info is vital before anyone can suggest a source. Unless everyone is familiar with the particular potentiometer they don't know what the shaft looks like. Sam, That looks like a Spectrol style turns counting dial. See Mouser catalog page 429 http://www.mouser.com/catalog/620/429.pdf, Part No 594-15111 and see if that is the one you're looking for. Surplus Sales also lists one at http://www.surplussales.com/ShaftHardware/ShaftH-2.html. Yeah, both of those are probably the correct dial. Now I just wan that knob! Sorry, I didn't mean for everyone to spend their free or not so free time searching for this. I just thought someone might look at it and say: "Oh, that... I have a bunch spare knobs here somewhere." Thanks. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
#13
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Bill Janssen writes:
Sam Goldwasser wrote: Ross Herbert writes: On 07 Jan 2005 09:31:00 -0500, Sam Goldwasser wrote: "NSM" writes: "Sam Goldwasser" wrote in message ... | I have a spectrophotometer with a wavelength adjustment like this: | | http://repairfaq.cis.upenn.edu/Misc/multitrn.jpg | | but I'm missing the black (in this photo) knob. It must have been accidently | lost before I acquired the device - the knob is easily removed so the | calibration can be adjusted. | | Does anyone have an extra knob kicking around or know where to obtain just the | knob? I have one or two of those counter dials in my parts box. If you still need it send Email Thanks! Will do. --- sam | Sci.Electronics.Repair FAQ Mirror: http://repairfaq.ece.drexel.edu/ Repair | Main Table of Contents: http://repairfaq.ece.drexel.edu/REPAIR/ +Lasers | Sam's Laser FAQ: http://repairfaq.ece.drexel.edu/sam/lasersam.htm | Mirror Sites: http://repairfaq.ece.drexel.edu/REPAIR/F_mirror.html Note: These links are hopefully temporary until we can sort out the excessive traffic on Repairfaq.org. Important: Anything sent to the email address in the message header above is ignored unless my full name is included in the subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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