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Vintage Test Gear and Workshop Equipment For discussions about vintage test gear and workshop equipment such as coil winders. |
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17th Jul 2017, 6:01 pm | #1 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,799
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Tek 2465A smoke
The boss' pet oscilloscope did the Rifa capacitor thing the other day. There was a general smell of burning paper in the lab and folk were looking for the source for a while. Finally the scope gave the game away visually.
No RCDs tripped, so I guess i'll go looking for a class-X paper capacitor, probably of a well known make, though they don't have a monopoly. Is it just a case of taking the Torx screws out and removing the plastic back panel, or are there any things to beware of in opening one of these? David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
17th Jul 2017, 6:33 pm | #2 |
Octode
Join Date: Jan 2007
Location: Dorridge, West Midlands, UK.
Posts: 1,475
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Re: Tek 2465A smoke
David
Its been awhile since I opened one but I think you will find the 2 X class caps buried inside on the A2 PSU board, there may also be some on the A3 board. Chris |
17th Jul 2017, 10:22 pm | #3 |
Dekatron
Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
Posts: 4,241
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Re: Tek 2465A smoke
If you haven't already stumbled across it, this thread will help: http://www.eevblog.com/forum/testgea...cope-teardown/
We've had a couple go up at work. It was the input mains filter. Sadly, they didn't write them off as BER, so they lived to fight another day. I'll be waiting for them |
17th Jul 2017, 10:43 pm | #4 |
Dekatron
Join Date: Jun 2016
Location: London, UK.
Posts: 3,687
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Re: Tek 2465A smoke
Is that a Schaffner filter? I've seen them make a really bad mess inside an HP digital scope. Replace on sight material.
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17th Jul 2017, 10:56 pm | #5 |
Dekatron
Join Date: Jul 2007
Location: Evesham, Worcestershire, UK.
Posts: 4,241
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Re: Tek 2465A smoke
Yup - the usual
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20th Jul 2017, 2:23 pm | #6 |
Moderator
Join Date: Mar 2012
Location: Fife, Scotland, UK.
Posts: 22,799
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Re: Tek 2465A smoke
Two Rifa 0.068uF X2 jobbies (in the Scots meaning!) One definitely no longer of this mortal coil.
The boss orders a pack of 5 from RS, carefully choosing Kemet as he didn't fancy more of the old type. RS parcel arrives.... shiny new golden Rifas! The comedy wasn't lost on him. Scope going again. Getting the outer case back on was the worst bit Thanks, all. David
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Can't afford the volcanic island yet, but the plans for my monorail and the goons' uniforms are done |
20th Jul 2017, 4:19 pm | #7 |
Dekatron
Join Date: Jun 2016
Location: London, UK.
Posts: 3,687
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Re: Tek 2465A smoke
Ah yes I got bit by that. Had no idea Kemet had bought them out until I'd paid for some. They should be good for 10 years or so. Stick a label on the back "replace X2's by 2027" or something. Being a 2465, one of the hybrids will probably blow up before then
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