Author Topic: 4-wire short - DIY  (Read 4668 times)

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Online MiDi

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Re: 4-wire short - DIY
« Reply #25 on: September 20, 2018, 01:32:55 am »
The problem is how can this be better announced, maybe a post in "Buy, Setll, Wanted", also I don't think that 19x36 grid it's really only for Datrons, there should be other DMM as well.
 In any case, put me on with 2, and make them 15EUR even with a thicker copper plate

Could worth a try to anounce it in buy, sell, wanted - so feel free to make advertisement for it.

If I remember right, the Datrons have screwed binding posts.
Then the question arises: would it make sense to build the short with plugs?
Better solution would be a pcb only version as mentioned at the beginning of thread...
 

Offline DC1MC

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Re: 4-wire short - DIY
« Reply #26 on: September 20, 2018, 05:35:15 am »
The problem is how can this be better announced, maybe a post in "Buy, Setll, Wanted", also I don't think that 19x36 grid it's really only for Datrons, there should be other DMM as well.
 In any case, put me on with 2, and make them 15EUR even with a thicker copper plate

Could worth a try to anounce it in buy, sell, wanted - so feel free to make advertisement for it.

If I remember right, the Datrons have screwed binding posts.
Then the question arises: would it make sense to build the short with plugs?
Better solution would be a pcb only version as mentioned at the beginning of thread...

Hello, so I'm attaching here a pair of pictures of an actual Datron device input panel. As you can see, the access it's only possible from top (or bottom) with a pcb only version (kind of like a m with veery long legs).
From left it's the case and from right it's the guard terminal.
So personally I'll lobe to have a plug version. Also wondering if it will be possible to replace the pcb with a piece of copper sheet  ;D, but with the same nice shape.

 So if you say the plugs version is doable, we can proceed with advertising it :)

 Best regards,
 DC1MC
 

Online MiDi

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Re: 4-wire short - DIY
« Reply #27 on: September 20, 2018, 06:23:32 am »
Thought of a lollypop pcb only design, or as Dave would call it: sex on a stick ;)

This draft/idea was for my HP 3457A:
« Last Edit: September 20, 2018, 06:25:51 am by MiDi »
 

Offline DC1MC

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Re: 4-wire short - DIY
« Reply #28 on: September 20, 2018, 07:50:37 am »
Thought of a lollypop pcb only design, or as Dave would call it: sex on a stick ;)

This draft/idea was for my HP 3457A:


Wow, that's a really nice idea, so one insert this and rotates it in position and tighten the binding posts screws, if I understand correctly. In case of a symmetrical grid, if you make it from metal it can be used as a Ninja throwing weapon  :-DD.

Well, if you can devise the PCB/plate shape correctly for Datrons as above (sadly I suck badly at mechanical design) you will have my gratitude and a beer & onion rings kit ;) at the local Eichbaum pub if you pass sometimes trough Mannheim  ^-^.
Of course I'm willing to measure whatever you instruct me to measure on the Datron panel, I have a digital Messchieber that collects dust ;).

 Cheers,
 DC1MC
 

Online MiDi

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Re: 4-wire short - DIY
« Reply #29 on: September 21, 2018, 04:37:18 pm »
Wow, that's a really nice idea, so one insert this and rotates it in position and tighten the binding posts screws, if I understand correctly. In case of a symmetrical grid, if you make it from metal it can be used as a Ninja throwing weapon  :-DD.

Well, if you can devise the PCB/plate shape correctly for Datrons as above (sadly I suck badly at mechanical design) you will have my gratitude and a beer & onion rings kit ;) at the local Eichbaum pub if you pass sometimes trough Mannheim  ^-^.
Of course I'm willing to measure whatever you instruct me to measure on the Datron panel, I have a digital Messchieber that collects dust ;).

Exactly, unscrew posts, put short in and rotate in position, screw posts.
At the moment it is just idea, has to be tested.
So first would do design for HP 3457A style posts and verify function.

There will be an option with sharp edges to throw like a ninja and an option to screw to your dremel to use as a saw  :-DD

Data needed: distances between posts, thickness of threads, thickness of insulation
 

Offline DuPe

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Re: 4-wire short - DIY
« Reply #30 on: September 27, 2018, 02:16:05 am »
@ MIDI: please see PM Folder
« Last Edit: September 27, 2018, 02:17:44 am by DuPe »
 

Offline DuPe

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Re: 4-wire short - DIY
« Reply #31 on: October 09, 2018, 11:11:05 pm »

Hi MiDi,
arrived well packed and ... (most amazing :-) shorts great.
CheersPeter
 
The following users thanked this post: MiDi

Online MiDi

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Re: 4-wire short - DIY
« Reply #32 on: October 10, 2018, 03:24:32 am »

Hi MiDi,
arrived well packed and ... (most amazing :-) shorts great.
CheersPeter

It would even short better when plugged in fully  ;)
 

Offline DC1MC

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Re: 4-wire short - DIY
« Reply #33 on: October 10, 2018, 04:24:07 am »
Any news for the flat one for Datrons, my family grew with two members, all in dire need of calibration.

 Cheers,
 DC1MC
 

Online MiDi

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Re: 4-wire short - DIY
« Reply #34 on: October 10, 2018, 04:53:07 am »
Data needed: distances between posts, thickness of threads, thickness of insulation

At the moment I have other projects, do not expect something the next weeks...
 

Offline DC1MC

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Re: 4-wire short - DIY
« Reply #35 on: October 10, 2018, 04:57:24 am »
Data needed: distances between posts, thickness of threads, thickness of insulation

At the moment I have other projects, do not expect something the next weeks...

Then I'll do the measurements and post them here, to have them handy in case you'll find some time.

 Cheers,
 DC1MC
 


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