Re: Looking for data on 9-pin Vacuum time delay relays used in old Tek-scopes
I still prefer the old original stuff as long as I can obtain it as I feel great respect for those people who have designed and made it. And it's fun watching it in operation!
Anyway, the thought of having a substitude if needed is a good feeling, too!
Joe
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Re: Binding Post Thumb/Head Nut Replacements
Thanks for your research, Jeff. I archived those auction pages since eBay will eventually delete them. Dave Wise From: [email protected] [mailto: [email protected]] On Behalf Of Jeff Dutky via groups.io Sent: Wednesday, July 21, 2021 4:43 PM To: [email protected]Subject: Re: [TekScopes] Binding Post Thumb/Head Nut Replacements I have added another picture to the album ( /g/TekScopes/album?id=266234< /g/TekScopes/album?id=266234>) showing all six candidates I have tried for replacing missing thumb nuts on 500-series scopes and plug-ins. The picture shows seven nuts, labeled A-G. The nuts are: A: An original Tek thumb nut, full height, as would be used on a 500-series scope, plug-in, or binding post adapter for a 465 or 475. B: "316 Stainless Steel Knurled Thumb Nut 1/4-28 Thread" from eBay (<> C: "M5 Precision Knurled Thumb Nut" from eBay (<>) D: "M5 Steel Leveling Knurled Thumb Nut" from eBay (<>) E: "OEM by Bosch 50534 1/4-28 Knurled Steel Nuts" from eBay (<>) F: "1/4-28 Internal Wrenching Allen Nut Alloy Steel Black" from eBay (<>) G: "1/4-28x7.5mm(L)x10mm(OD) Metric Threaded Brass Knurl Round Insert Nuts" from eBay (<>) My evaluations are: (A) are, of course, practically perfect in all particulars. I'm still surprised and saddened that I can't find a source for them. Were these custom made for or by Tek? (B) has very pleasant diamond knurling, at least as fine as what Tek used, but is about 1.5X the outer diameter and about 3X as tall. It is only threaded half way through on the flat end, which makes it hard to use the female banana jack with this nut in place. While it is larger in diameter than the Tek part, it looks like it will still leave enough clearance on something like a CA or D plug-in to use the UHF or BNC connectors, but it may be too large for use on some TM500, 5000-series, or 7000-series plug-ins. (C) is the wrong thread, closed at one end, and too short, so it will not properly clamp a wire inserted through the binding post. The knurling is very nice. It's a shame that these are otherwise unsuitable. (D) is the wrong thread, and the outer diameter is much too large for even the relatively roomy 500-series plug-ins. The nut is also about 1.5X the height of the Tek part. The knurling is coarser than the Tek part, and is not diamond knurling, but I think it's still pleasant. They are entirely unsuitable to the task. (E) is the same outer diameter as (B) but only slightly taller than the Tek nut. The knurling is much coarser than either (B) or the Tek part. Like (B) this seems to leave enough room for the probe inputs on 500-series plug-ins, but may be too large for some TM500, 5000-series, or 7000-series plug-ins. (F) is almost perfect; only slightly taller than the Tek part, it does not interfere with the use of banana plugs, and looks very nice on a scope or plug-in. The knurling, while not diamond, is very fine and pleasing. I liked these so much that I ordered several more bags of them in case of future need. (G) is slightly shorter than the Tek part, which means that it leaves a little bit of the threaded shaft/banana jack cylinder exposed to damage. The brass doesn't look nearly as odd on a scope or plug-in as I feared it would, and even though the knurling is very coarse, it still feels nice on the fingers. These have the singular advantage of being very inexpensive (I got 15 pieces for under $9, and could probably have paid even less if I were willing to buy larger quantities). (F) and (G) are my favorites, but (B) and (E) would do in a pinch. -- Jeff Dutky
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
On 2021-07-22, at 16:40, Carsten Bormann <cabocabo@...> wrote:
But I was recommending the ¡ª harder to get ¡ª MS8911 anyway :-)
Actually, no longer harder to get at all: Gr¨¹?e, Carsten (Blatant affiliate link again, because that¡¯s what my system gives me¡)
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
On 2021-07-22, at 16:29, Dave Daniel <kc0wjn@...> wrote:
Hmmm¡I looked up the -5000 and apparently it was replaced by the -6000. I looked that up and it has been replaced by the -1920. $5000.
Forget IET, which was unhappy that the original 5000 was competing with their higher prices reselling it. So they invented the 6000, which has one spec slightly improved. In Germany, it is easy to get the 5000; it should be that way in other places as well: Gr¨¹?e, Carsten (Affiliate link above, for those who can¡¯t stomach such blatant commercialism. But I was recommending the ¡ª harder to get ¡ª MS8911 anyway :-)
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Re: Replace/Repair TM 500 Module Side Panel Latch
On Thu, Jul 22, 2021 at 10:26 AM n4buq <n4buq@...> wrote: I was trying to avoid creating yet another account with yet another
password on yet another website merely for the purpose of determining a
cost for something but I suppose it's necessary.
I hear you, although I seem to remember you can use other authentication providers to log in to ShapeWays. Maybe that'll work for you. This would be a one-off job so I presume the cost will be quite a bit
higher but wanted to ask.
I don't think they charge anything extra for one-offs, as their process seems to be entirely automated until post-printing. Good luck!
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
Hmmm¡I looked up the -5000 and apparently it was replaced by the -6000. I looked that up and it has been replaced by the -1920. $5000.
DaveD
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On Jul 22, 2021, at 10:24, Dale H. Cook <bridgewaterma@...> wrote:
?On Thu, Jul 22, 2021 at 08:28 AM, Richard Peterson wrote:
I use an IET DE-5000 LCR meter. Mine has both tweezers and Kelvin clips (i
installed these to replace the alligator clips that came with it). I would note that the IET DE-5000 is a rebadged DER EE DE-5000 (I own the DER EE meter). I bought a second alligator clips module (TL-21) and converted it to Kelvin clips. It does pretty much everything that I want except measuring leakage current at operating voltage (needed when working on vacuum tube equipment, but I have equipment for that measurement). I highly recommend it.
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Re: Replace/Repair TM 500 Module Side Panel Latch
I was trying to avoid creating yet another account with yet another password on yet another website merely for the purpose of determining a cost for something but I suppose it's necessary.
This would be a one-off job so I presume the cost will be quite a bit higher but wanted to ask. I got a quote from a local place which is reasonable so that's an option. A friend has a printer and said he would attempt to print one for me but his filament/PLA is older and he isn't sure how well it will turn out. I'll most likely see what he can do first and go from there.
BTW, the part is a retrofitted bezel for a Fluke 8050A for which I've developed an OLED readout that uses two of the small 0.96" displays to replace the now-defective LCD. It works well so I would like to get it mounted to the front panel in such a way that it looks somewhat decent.
Thanks again,
Barry - N4BUQ
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----- Original Message ----- From: "Siggi via groups.io" <siggi@...>
To: [email protected]
Sent: Thursday, July 22, 2021 9:12:20 AM
Subject: Re: [TekScopes] Replace/Repair TM 500 Module Side Panel Latch
On Thu, Jul 22, 2021 at 9:29 AM n4buq <n4buq@...> wrote:
I notice the price for your parts is quite inexpensive.
These are tiny parts and I feel the price for each is quite ... exorbitant
... especially once you add shipping to the frozen tundra where I live -
Canada. The/a/one problem is that there's a fixed cost per part, as they
batch a bunch of prints together for a run. Afterwards a human has to sift
through the unused medium to find and identify and package the parts.
I remember reading a suggestion somewhere to model batches of small parts
such that they're connected together in some way, as this may amortize the
fixed cost over a number of parts.
Is that price set by Shapeways?
Yes, the price is set by ShapeWays. There is an option to create a "store"
and to add a "commision" on top of that, which would then presumably
increase the price from the base price ShapeWays sets.
I ask because I have a small 3D printing job that I would like to have
printed and wondering how much it would cost to have that done by
Shapeways. Please feel free to contact me off-list if you prefer.
It's easy to check how much ShapeWays would ask for your print job. You
just create an account and upload your model, after which they'll be happy
to give you a cost for printing in a variety of materials.
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
On Thu, Jul 22, 2021 at 08:28 AM, Richard Peterson wrote: I use an IET DE-5000 LCR meter. Mine has both tweezers and Kelvin clips (i
installed these to replace the alligator clips that came with it). I would note that the IET DE-5000 is a rebadged DER EE DE-5000 (I own the DER EE meter). I bought a second alligator clips module (TL-21) and converted it to Kelvin clips. It does pretty much everything that I want except measuring leakage current at operating voltage (needed when working on vacuum tube equipment, but I have equipment for that measurement). I highly recommend it.
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Re: Replace/Repair TM 500 Module Side Panel Latch
On Thu, Jul 22, 2021 at 9:29 AM n4buq <n4buq@...> wrote: I notice the price for your parts is quite inexpensive. These are tiny parts and I feel the price for each is quite ... exorbitant ... especially once you add shipping to the frozen tundra where I live - Canada. The/a/one problem is that there's a fixed cost per part, as they batch a bunch of prints together for a run. Afterwards a human has to sift through the unused medium to find and identify and package the parts. I remember reading a suggestion somewhere to model batches of small parts such that they're connected together in some way, as this may amortize the fixed cost over a number of parts. Is that price set by Shapeways? Yes, the price is set by ShapeWays. There is an option to create a "store" and to add a "commision" on top of that, which would then presumably increase the price from the base price ShapeWays sets. I ask because I have a small 3D printing job that I would like to have
printed and wondering how much it would cost to have that done by
Shapeways. Please feel free to contact me off-list if you prefer.
It's easy to check how much ShapeWays would ask for your print job. You just create an account and upload your model, after which they'll be happy to give you a cost for printing in a variety of materials.
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
I use one of these also, very good little device, I have no complaints. Useful as a regular old milliohmmeter with the Kelvin clips also (I added these as well).--EricSent from my Galaxy
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-------- Original message --------From: Richard Peterson <saaber1@...> Date: 7/22/21 7:28 AM (GMT-06:00) To: [email protected] Subject: Re: [TekScopes] in-circuit capacitor testing (ESR tester) -- ideas appreciated. I use an IET DE-5000 LCR meter.? Mine has both tweezers and Kelvin clips (i installed these to replace the alligator clips that came with it).? It will test ESR at 100kHz and capcitance at 100/120/1k Hz as needed - it also has a 10kHz frequency available.? Of course it can do many other things as well so it's much more than an ESR tester . . . i use it regularly, so well worth the $100 i spent on it.
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
This one works well in circuit and is easy to build.
Bama Manual Archive (edebris.com)
<>
It doesn't have the greatest resolution for very low ESR caps, but for
good/bad it's always been reliable.
ST
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On Wed, Jul 21, 2021 at 3:35 PM Ronan <bass.woofer@...> wrote: Hello again,
My main thread is " 2712 SA with display (and normalization) issues".
Due to the large number of electrolytic caps this SA has, I wonder if
anyone can recommend a (not too costly) in-circuit ESR capacitor tester I
could use to narrow down problem caps that otherwise show no obvious signs
of failure (i.e. leaking, exploded).
I've seen the tweezer-type LRC testers, and they might work for in-circuit
SMD capacitor testing, however, thought I'd run this by everyone first,
since I have no experience with such in-circuit cap testing/testers.
Creating a new Topic, since this is a generic question.
Thanks in advance,
Ronan
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
On 2021-07-22, at 14:28, Richard Peterson <saaber1@...> wrote:
I use an IET DE-5000 LCR meter.
Recommend. Another good, but even cheaper addition: Mastech MS8911. (Don¡¯t fall for the MS8910, which is not very useful.) The MS8911 has a 0.1 V mode which can be used to avoid switching on semiconductor junctions. It also uses up very little space in the instrument drawer :-) Gr¨¹?e, Carsten
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Re: Replace/Repair TM 500 Module Side Panel Latch
Hello Siggi,
I notice the price for your parts is quite inexpensive. Is that price set by Shapeways? I ask because I have a small 3D printing job that I would like to have printed and wondering how much it would cost to have that done by Shapeways. Please feel free to contact me off-list if you prefer.
Thanks,
Barry - N4BUQ
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----- Original Message ----- From: "Siggi via groups.io" <siggi@...>
To: [email protected]
Sent: Thursday, July 22, 2021 5:58:50 AM
Subject: Re: [TekScopes] Replace/Repair TM 500 Module Side Panel Latch
I modeled these up and put them on Shapeways, and I understand some people
have had success with those. You can buy prints, or you can download the
models and print them yourself.
Here are the links, in case anyone else needs some:
I don't take a markup on those, and the models are free to use as you like:
.
Siggi
?ann fim., 22. j¨²l. 2021 kl. 06:06 skrifa?i EJP <esmond.pitt@...>:
On Wed, Jul 21, 2021 at 07:59 AM, Jeff Dutky wrote:
Before we start trying to manufacture a replacement (which I think is a fine
idea, especially in this new age of 3D printing) There are existing 3D models for these. I'm not sure where I got mine,
probably Thingiverse or Tinkercad, but I've printed a bucn of them and they
work. I'm happy to supply either the models via email or 3D prints at
cost-plus.
EJP
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
I use an IET DE-5000 LCR meter. Mine has both tweezers and Kelvin clips (i installed these to replace the alligator clips that came with it). It will test ESR at 100kHz and capcitance at 100/120/1k Hz as needed - it also has a 10kHz frequency available. Of course it can do many other things as well so it's much more than an ESR tester . . . i use it regularly, so well worth the $100 i spent on it.
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Re: Replace/Repair TM 500 Module Side Panel Latch
Shapeways shipping to UK has got stupid expensive lately. I need to find a UK based 3D printer that will SLA print in nylon.
PS If I do find someone, will you make the models available for DL?
Thanks
David
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-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Siggi via groups.io Sent: 22 July 2021 11:59 To: [email protected]Subject: Re: [TekScopes] Replace/Repair TM 500 Module Side Panel Latch I modeled these up and put them on Shapeways, and I understand some people have had success with those. You can buy prints, or you can download the models and print them yourself. Here are the links, in case anyone else needs some: I don't take a markup on those, and the models are free to use as you like: . Siggi
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Re: Replace/Repair TM 500 Module Side Panel Latch
I modeled these up and put them on Shapeways, and I understand some people
have had success with those. You can buy prints, or you can download the
models and print them yourself.
Here are the links, in case anyone else needs some:
I don't take a markup on those, and the models are free to use as you like:
.
Siggi
?ann fim., 22. j¨²l. 2021 kl. 06:06 skrifa?i EJP <esmond.pitt@...>:
toggle quoted message
Show quoted text
On Wed, Jul 21, 2021 at 07:59 AM, Jeff Dutky wrote:
Before we start trying to manufacture a replacement (which I think is a fine
idea, especially in this new age of 3D printing) There are existing 3D models for these. I'm not sure where I got mine,
probably Thingiverse or Tinkercad, but I've printed a bucn of them and they
work. I'm happy to supply either the models via email or 3D prints at
cost-plus.
EJP
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Re: Replace/Repair TM 500 Module Side Panel Latch
On Wed, Jul 21, 2021 at 07:59 AM, Jeff Dutky wrote: Before we start trying to manufacture a replacement (which I think is a fine
idea, especially in this new age of 3D printing) There are existing 3D models for these. I'm not sure where I got mine, probably Thingiverse or Tinkercad, but I've printed a bucn of them and they work. I'm happy to supply either the models via email or 3D prints at cost-plus. EJP
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Re: Looking for data on 9-pin Vacuum time delay relays used in old Tek-scopes
I looked tonight at Nebraska Sales & Surplus. They have them. the 555 driving a relay looks more and more attractive.
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Re: in-circuit capacitor testing (ESR tester) -- ideas appreciated.
I did this review of 3 easily available units. It is still valid today.
Buyer beware of the El Cheapo Chinese units on Xbay. Many disappointing reviews.
Menahem
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Re: AA 501A Parts, DM 501A Probes
They seem pretty unique¡two of the 1/4-turn latches along the top¡an insulation layer on the inside¡none of the dozen or so different modules I have here have the same type of side panel. Sphere had the exact part, just no latches, but I think I¡¯ve been able to remove ones from other side panels to retrofit. This was my first dealing with Sphere. Susan and Walter were very helpful and the prices were very reasonable.
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Joe
Dale H. Cook
Richard Peterson
David C. Partridge