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Member Videos / Re: My week this week, my workshop videos!
« Last post by hermetic on Today at 11:04:05 AM »
Hi folks,
This week I get the heat exchanger up on the ceiling, get the boiler in position and finsh most of the plumbing. On Friday I visit a retired precision engineer of very wide experience to put some more three phase sockets in his workshop, and have a good look around at his collection of machinery and one of the many innovative things he has built! A very interesting week!
Sunny and warm in East Yorkshire? It won't last!!
Phil
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Electronics & IC Programing / Re: Unknown component...
« Last post by Muzzerboy on May 10, 2024, 05:18:36 PM »
Looks very similar to this full bridge rectum frier. But perhaps just a half bridge with 2 diodes.
https://www.ebay.co.uk/itm/124664837051
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Electronics & IC Programing / Re: Unknown component...
« Last post by russ57 on May 08, 2024, 08:49:54 PM »
I do, but it is effectively open circuit.
(ie, I think it is dead). Drawing out the circuit to make sure diodes make sense.
(not some odd scr or other complexity)
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Electronics & IC Programing / Re: Unknown component...
« Last post by BillTodd on May 08, 2024, 09:22:29 AM »
looks like some kind of rectum frier to me .

Have you a diode test setting on your multimeter?  if so you should be able to read the forward voltage and check each diode.

Bill]
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Electronics & IC Programing / Unknown component...
« Last post by russ57 on May 08, 2024, 09:14:19 AM »
This is in an elma antimag demagnetizer.
I think it is just a pair of diodes. But I'd like to be sure. It has 3 terminals and measures about 5Mohm both forward and reverse across each supposed diode.
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Gallery / Re: Small Punch Tool
« Last post by philf on May 07, 2024, 04:37:13 PM »
I thought so Andrew - but then I don't think there can be much that you haven't got and have rescued from oblivion!

By the way - you mentioned bellows problems with your die sinker. We had a machine at work which used stainless steel bellows which had a very limited life in the application. (Applying pressure to an ultrasonic welding head.) We had a local company which was started by an old Mullard employee (Dr Keith Bromley). The company was Fibracon Twin, who specialized in PTFE products. They made us some bellows in PTFE. Once fitted they never had to be changed! I just Googled them and they are now part of a group: 2014 Röchling Engineering Plastics (UK) Ltd acquired Fibracon Twin Ltd.
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Gallery / Re: Small Punch Tool
« Last post by awemawson on May 07, 2024, 04:20:58 PM »
Yes Phil, there's a wee little write up about it here on the forum:

https://www.madmodder.net/index.php/topic,10085.0.html
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Gallery / Re: Small Punch Tool
« Last post by philf on May 07, 2024, 04:11:10 PM »
Andrew - haven't you got a wire eroder as well?
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Gallery / Re: Small Punch Tool
« Last post by awemawson on May 07, 2024, 03:46:43 PM »
My Eurospark H425 die sinker is almost identical to the Agiemaspark, in fact many were badge engineered. Here's an ancient thread describing mine:

https://www.madmodder.net/index.php/topic,9319.msg103084.html#msg103084
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Gallery / Re: Small Punch Tool
« Last post by philf on May 07, 2024, 01:43:12 PM »
We had an Agiemaspark (not sure how it's spelt) die sinker. As you say it used a paraffin like coolant. It probably went for £100 or so when our toolroom closed! A very useful machine.
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