Can anyone identify, or give me any info about this? It's from a 1930s/40s era adding machine.
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Re: Ancient capacitor?
It's just an old wound aluminum foil paper+wax capacitor.
Details would be printed on the other side of it. I would unscrew the mount and look for the part's value and voltage rating. It's surely a dud given the age.
I would guess it's used to prevent some switch contacts from arcing. Or a small motor cap? -
Re: Ancient capacitor?
wow, tar-dipped cotton sleeving!Comment
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Re: Ancient capacitor?
Thanks, I'll check the other side. There is a small motor, and under that, what looks like another motor underneath, perpendicular to it. Or maybe it's some kind of gear box…
Where the power cable comes in there's a switch with what looks kinda like (from my vague memory) ignition points from a distributor. Pressing those together will power the 1st motor. Underneath, there's another smaller set of “points” that will power the other motor, if the 1st set is closed. I found if I rotate a lever on the side, it closes the 1st set, and if I plug it in, the assembly on the side of the machine will rotate once, which opens the points back up and shuts it back off.
I have no clue what all might be wrong with it, but am curious what, if anything would change if I replace that cap, though I don't expect it to fix it.
I'd be happy to upload more pics if anyone would like to see them. It's a fascinating machine, and to me a bit mind boggling how complex it is with all the levers.
My favorite part is that inside the bottom cover a technician named C. Emmerich scratched in the details of a repair he did on it on 6/27/52. 3 hours of labor + parts, totaling $12.15. Replaced bushings, springs cleaned and oiled.Comment
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Title:
Capacitor detached from PCB – RTX 2070 Super Founders Edition
Description:
During maintenance on an RTX 2070 SUPER Founders Edition, I found a capacitor lying on my desk after reassembly.
I did not notice it detaching, so I am unsure of its original location on the PCB.
Procedure performed:
- Removed backplate
- Cleaned heatsink and PCB with isopropyl alcohol + soft ESD brush
- Reapplied thermal compound
- Reassembled card
Observed behavior after reassembly:
- GPU powers on and operates normally under... -
Hello everyone,
I have an Dell Inspiron 15 3537 laptop mainboard (LA-9982P Rev. 3.0 (A02)) with a blown SMD capacitor as shown in the attached images. However, there is no printed specifications near the capacitor or a codename for the capacitor to identify the specification of the capacitor to replace it. I wonder how to identify the capacitor since the mainboard schematics are also useless as the capacitors are not named on the board. Any help would be highly appreciated.
Thank You. Stay Safe.
Chamara... -
I replaced some capacitor which is located on optical pickup pcb which is shown in the table below(PCB #2).Because it have been out of order.
Now,It works very well,But I just have found that all caps (6svpc100my and other part number as well) ,which is shown in the table below, has ultra-high ripple current spec.
It is not able to obtain any capacitor which can be a substitute for this ultra-high ripple current nichicon capacitor.
So I replaced it with samxon and rubycon's general capacitor(GP,YXA series).
I know that these capacitor will not last as long as nichicon capacitor... -
I desoldered samwha NF capacitor(50v 5.6uf) from PCB circuit of 29inch CRT TV which have symptoms of no display after I heard sound of inrush of current to TV whenever I switch on this television.
I measured ESR value of this non-polarized capacitor(samwha NF capacitor 50v 5.6uf) by means of MESR-100 ESR meter and It displayed 0.3 ohm
And When I measured its capacitance with digital multimeter and LCR-T4 Mega328 meter, It displayed 10uf from DMM and 8uf from LCR-T4 meter.
I found catalogue of samwha capacitor(samwha-catalogue_3.pdf file), which is attached to this thread,... -
When I tried to repair LG 29 inch CRT TV, I found that the ESR value of samyoung SMS capacitor(160v 2.2uf), which is very close to D1879 transistor, is 6 ohm.
Judging from above ESR Meter Table,I think It is necessary to replace this sms capacitor.So I visited local electronics shop,and I purchased 160v 2.2uf rubycon YK capacitor.
But when I browse through rubycon YK datasheet,I found that there is no ripple current rating for 160v 2.2uf specification. But On the contrary, I found 39 mA ripple current rating for 160v 2.2uf SMS capacitor.
Rubycon YK DataSheet (b...
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