hi i'm after some advice,i've a couple of photo flash units whice run on 240ac mains.the caps will no longer charge up enough to fire.they are daly psft X34 111/10/6 cw.they measure 50mm x 75mm.i was informed by a bloke in maplins i should look for a similar cap of values,which he thought to be 450Vdc 220-470uF.i've looked on the net and all i could find were,450Vdc 1000uF or a higher uF value. what i wanted to know is, if i replace with a cap of this value will i find shrapnel embeded all around or will it reduce/increase recycle time of flash output.the flash units date back to the late 60's.if anyone could help,i would appreciate it.thanks ade.
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Re: photo flash caps
i did not understand what uf the original caps are rated.
you should use photo flash caps. I see rubycon on most cameras. the circuit is giving the caps a specific charge so the new caps should exceed or meet the original caps specs. i assume size is a factor also.Last edited by willawake; 10-12-2006, 02:18 PM. -
Re: photo flash caps
Is this the kind of device you have?Attached FilesJimComment
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Re: photo flash caps
If you use a different part from the original, be sure to use caps that are designed for photo flash usage. Regular caps are not designed to handle lots of quick charges and discharges.PeteS in CA
Power Supplies should be boring: No loud noises, no bright flashes, and no bad smells.
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To kill personal responsibility, initiative or success, punish it by taxing it. To encourage irresponsibility, improvidence, dependence and failure, reward it by subsidizing it.
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Re: photo flash caps
hi peteS, no, i've only one cap in each unit.yours looks like a mother of a flash.the problem i have, is i don't have a clue as to the values of them.the guy from maplins was giving me a rough estimate.which is why i thought,"pick the brains" of someone whom may know.as you've said "use caps that are designed for photo flash",i really don't have a clue,but i'm learning fast.i've looked at my battery powered flashes,and they're tiny in comparison.
i'm blown away by your picture.nice caps man.would i be able to use caps that are slightly smaller?and a higher uF value?thanks for your help. ade.Comment
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Re: photo flash caps
i believe Daly Condensers is now http://www.bhc.co.uk/
i cant find any info to decode the markings on your cap. I think it would be best not to exceed the original uf value. i wouldnt recommend messing about until you know the spec of those caps and find correct replacements.
what flash units are they?Comment
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Re: photo flash caps
May be there is no problem with your flash. The Xenon tubes will degrade too with each flash. I would messure the voltage on the cap, may be your step up circuit is bad, or the ignition coil and it`s related thyristor is. As long as the cap is not shorted, i doubth that this is the actual problem.Comment
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Re: photo flash caps
anything from the timeframe stated is likely to have dried out or leaky lytics.
post a pic of the cap and inside the unit.
i have seen several flash units that had been stored a long time that had a photoflash cap so leaky the inverter would sing but not charge it.Comment
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Re: photo flash caps
hi sorry about the delay, you know ,work comes first.the units are courtenay photonics,colourflash 100's.
i've looked into several possibilties,maybe its the tubes or other components,well the tubes can take on average 1 million flashes or more, so i got the other very dated bits checked,they seem ok.well you know what they say "they don't make them like that anymore"
i've been in touch with bhc components,time will only tell if theres any response.
could anyone recomend a book on electronics?something basic.
i'll send a photo asap.you'll laugh! ade.Comment
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I know I've been a little scarce lately (like the last 2-3 years), but I'm still here and still doing my thing with fixing PSUs.
For today's considerations, I have a Seasonic B12 BC-550 [A551bcafh] 550 Watt ATX power supply for you (click on links for full size images).
https://www.badcaps.net/filedata/fetch?id=3591771
https://www.badcaps.net/filedata/fetch?id=3591772
It's a modern ATX unit with fixed (non-modular) cables and an 80-plus bronze certificate. Here's the label:
https://www.badcaps.net/filedata/fetch?id=359177... -
Hi all,
I’m trying to recover a Lenovo Yoga Slim 7-14ARE05 with board DA0LS3MBAF0 Rev:F. I’ve run into an unusual issue where USB-C PD is stuck at 4.7–5V and the system won’t boot (keyboard lights flash briefly, then nothing).
🔥 The Problem Started After Suspected ESD/PD Fault
I experienced a power issue or ESD event through a USB-C charger
After that, the NX20P5090 power switch was visibly burned and was replaced
Now the PD controller always negotiates 5V @ 2A, even with known-good chargers
🧠 What I’ve Done So Far
Flashed... -
Hello,
First, I am a complete noob with high voltage stuff. I'm learning, but I need help by someone looking over my shoulder.
I recently came into posession of a Heathkit IO-4205 5MHz Dual Trace Oscilloscope. The documentation is copyright 1978. I'm told it works.
I opened it up to check the caps before I applied power, and found the following black caps and wanted to know what they were. They are on the power supply board. I was able to read the name and model and came up with, "Nytronics 162J-1, 0.1uF, 20% tolerance, 2000VDC."
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Hello!
I have two projects on my work bench. One is a friends dead JBL Xtreme speaker with a blown voltage regulator and corresponding bulged and shorted cap. That cap has clear markings so I know what replacement I need for it.
The other project however is a whole different deal. It's a Zoom 9000 guitar effect from the 90th that has developed a devil hound howl when there is no input from the guitar. I'm guessing caps problem. So, since I don't really use this effect anymore I thought it would be a perfect project to learn on.
I have studied the board and... -
I'm trying to repair two old VCRs, they both have bad caps. One has leaky ones, the other would barely run until I subbed in some caps from another power supply I had laying around (though they are the wrong values). This vcr works for an hour or two, but then the power supply starts whining and the picture gets lines in it. I didn't replace all the secondary caps, so another voltage might still be problematic, or the values I used are too far off.
I've been on mouser and digikey but the options are a bit overwhelming. I just need some new ones that will work. They don't need to be top quality,...
Comment