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I was wondering if anyone was willing to make the boxes for the multipliers
so ones that go bad can be made. The box would need the holes for the wires
and mounting threads as original. The old epoxy will break down like the
transformers do. Anyone willing to rewind/build replacement transformers
would be welcome. Buying new diodes, condensers, etc. to put in the box
then use silicon sealant will give enough insulation. I know the sealant
works on 21kV. I had to put some on the PDA where the white was no longer
sealing. The clear type I used stopped the arcing and the scope works fine.
The diodes that can be used are 2CL2FM. They are 20kV and heavier capacity
than originals. I know the diode and condenser from ground to the current
limiter/sensing is low voltage. The diode should be very fast with low
reverse current at 600-1000V, e.g. 1N4937, and the condenser is ,01mfd. I
see comments about multipliers going bad. This would be a good way to get
the scope back working.

Mark

Hello,

how big are they.


Tam

--
With best regards
Tam HANNA

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encapsulating the HV multipliers is easily done using a "Potting Shell".
they are available cheaply off-the-shelf from many vendors, here's two examples:




a thin-shelled 3D printed box would be pretty fragile, I think.

all the best,
walter

--
Walter Shawlee 2
Sphere Research Corp. 3394 Sunnyside Rd.
West Kelowna, BC, V1Z 2V4 CANADA
Phone: +1 (250-769-1834 -:-
+We're all in one boat, no matter how it looks to you. (WS2)
+All you need is love. (John Lennon)
+But, that doesn't mean other things don't come in handy. (WS2)
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We are not the only experiment. (R. Buckminster Fuller)

I have designed and printed several for the 465-475 etc. I also have printed a stand alone box for 455/475M as well. I can supply an STL for either one.

--
Michael Lynch
Dardanelle, AR

The 465/475 box is an almost exact replica of the original. Modified the mounting to make it easier to install.

--
Michael Lynch
Dardanelle, AR

Pictures of my enclosures are here:

/g/TekScopes/album?id=244462

Michael Lynch
Dardanelle, AR

OK. I have enough trouble already.

If you want me to print something, send an email to tamhan aeht tamoggemon point com. With an included STL file.


Then I check if I can do it and will report back.


I cannot cackle and levitate across the Gobi desert, looking for human meat. Keep in mind that I print all of these things FOR FREE, and usually also eat the postage costs.


Tam

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With best regards
Tam HANNA

Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at

Greetings,

A close friend of mine, who is an electronics engineering tech, owns some nice 3D printers as a side business.

If there is interest I will give him a “heads up” and offer his contact information to the group.

I have no financial interest, but he does nice work.

Regards,

Ken

Mr. Lynch,

The photos of your enclosures are nice. I am glad to see a supplier that has these cases for those that have bad multipliers. I brought it up since some have said their multiplier is bad and wanting a replacement. I know the 7000 series has problems with multipliers. I do not know if the 2000 series has that problem also. I know the 2000 series has more parts in them making them larger in size. I do not have an STL file to send anyone. Thank you and the others who replied.

Mark

Mark,

Call me Michael, I have not designed or printed anything other that these two, mainly because I have not had the need for anything else. I would be glad to try to help with other enclosure boxes. All I would need are some detailed pictures and some general dimensions of the original enclosures. As Walter mentioned, these 3D printed boxes are not very sturdy as printed. However, after the components are installed and they are potted, then they are perfect for the job. All the enclosure must do is hold the components and the potting materials until the latter sets up. I have 2 of the 465/475 HV multipliers running as well as the 455 model. Some of the other HV multipliers are more complex, but I would be willing to try to help with designing the STL or 3D models. I am not in this as a commercial business, just a dedicated hobbyist. I have printed some of these for others, not charging for the 3D print. All I ask is that they cover postage and, in the case of the 465/475 enclosure, the cost of the new mounting hardware. Please let me know if I may be of any assistance.

Sincerely,

--
Michael Lynch
Dardanelle, AR