Re: This can't be right...
This capacitor has to sustain 5-8A of current and a sawtooth AC voltage which will blow any electrolytic capacitor not specifically made for this purpose.
These specific capacitors are very rare since they were produced exactly for CRT monitors. And, of course, they are out of production.
The current is so high than even a generic polyester capacitor will have difficulties handling the required current.
You should parallel three 6,8uF polyester capacitors and they should be adequate as a replacement....
Hitto
Senior Member
Last Activity: 12-04-2023, 07:05 AM
Joined: 04-25-2019
Location: Italy
-
Last edited by Hitto; 06-27-2021, 01:10 PM. -
Re: Fake Nichicon capacitors with almost-perfect sleeve?
Fake capacitors will measure perfectly when unused but then decade rather quickly.
About genuine (and very good) capacitors having a copper core to their leg, this is true. Panasonic FR capacitors have a copper core: if you sand or twist the legs there is a copperish strate.Last edited by Hitto; 01-23-2021, 03:35 PM.Leave a comment:
-
Re: Fake Nichicon capacitors with almost-perfect sleeve?
I don't know if it is available on eBay but this part is pretty much everywhere.
This is supposed to be a Nichicon “VY” series.Leave a comment:
-
Fake Nichicon capacitors with almost-perfect sleeve?
Fake Nichicon capacitors with an almost-perfect sleeve?
Same font, perfect logo, same size of the sleeve. The air vent looks okay. The diameter of the capacitors is correct per datasheet.
It truly looks like the real thing.
I doubt that you would distinguish it from a genuine one.. if it wasn't for the bung.
Shall we be afraid, at this point, that even the bung can be replicated?... -
Re: Difficulty trying to match ESR of a replacement capacitor
Chemicon KXJ is a good replacement. Being 12.000H/105°C, it will outlast that TV. Do not worry about dissipation factory for the reasons written above.Leave a comment:
-
Re: HELP: 330uF tantalum capacitors
As stj wrote.
When it comes to tantalums use parts which are at least double the required voltage because tantalums do not fail silently.
Very good tantalums, both 330uF and 6.3V are 6TPE330MAP but buy them from Mouser, RS and Distrelec to be sure that they are the real thing.Leave a comment:
-
Re: Callins capacitor?
They looks to be bakelite capacitors just like Roederstein's EKU.
They are fancy and they are vintage, with a diameter really insane for a capacitance of 300uF (26mm). Maybe due to their low E.S.R. being harder to produce in a smaller diameter back in the day.
Roederstein EK/EKUs can be found in 80s amplifiers. Desoldered some and still measuring good.
A more than good substitute would be a Panasonic FC (I doubt that these Callins have a lower E.S.R.).Leave a comment:
-
Re: Looking for the datasheet of this 5.6uF Elna capacitor
@Momaka: This is a good idea as this one measures a bit badly (around 2Ωs of E.S.R.) and quite high loss. Tipically this kind of capacitor as a E.S.R. inferior to 1Ω (measured other series took from CRTs) and very low loss (not higher than 0.8 on the average E.S.R. meter). It could be that it has aged. Howewer it is not clear if a single PP/PE is able to withstand 5-6A of ripple while this one should (though I will not use it as it measured badly).
@japlytic: I think so. Howewer ELNA had another...Last edited by Hitto; 09-05-2020, 07:51 AM.Leave a comment:
-
Re: $20 "500W" PSU From MicroCenter, how bad can it be?
Can you upgrade capacitors (from 1000uF to at least 2200uF) on the secondary to check how much ripple goes down? 250mV is absurdly high, too much even for quick tests.
Also 220uF on the primary means that, if used on 220V, we would have ~110uF. Way too low even for a 200W power supply.Leave a comment:
-
Re: Improving CRT geometry by upgrading capacitors
Another picture:
800x600 with a $20 VGA card.
For people who think that CRT is outdated technology.
There is room for higher resolution up to 1280x1024, maybe 1600x1200 with a better video card.
Well, the quality maxes out at 1024x768 in terms of sharpness which is even more defined than 800x600. Capacitors which passes video signals where upgraded with very low E.S.R. capacitors and decoupling for video amplifier was "improved".
The most difficult...Last edited by Hitto; 07-06-2020, 04:24 PM.Leave a comment:
-
Re: Improving CRT geometry by upgrading capacitors
I rely on a PCIe VGA card with direct VGA output.
By the way, the CRT is still working perfectly. Planning to find a bigger monitor and tune everything till the geometry is almost perfect.
The picture looks real, incredible. Not bad for a 2002 monitor.
...Leave a comment:
-
Re: Advice on replacing some mid80's caps
Samyoung capacitors are not related to Samsung. The SM series should be general purpose, so pretty much any replacement will perform well. Use a Panasonic FC if you want something better than an ordinary replacement or a Rubycon YXF as already suggested.
Use high ripple capacitors on 100/160/250V areas, such as Rubycon BXA.
Use specific capacitors for the horizontal section as it is a very important area. A wrong capacitor in the horizontal section will lead to failure. Take a pair of photos of that area...Last edited by Hitto; 06-23-2020, 05:18 AM.Leave a comment:
-
Re: Improving CRT geometry by upgrading capacitors
I agree.
Too bad that time is passing and the plastics, even with very good monitors, are both yellowing and degrading. The age of the plastic material goes the point that you have to be careful even removing screws (when removing e.g. the main board) or mounting back everything will be impossible. Faston are to be swapped to get rid of corrosion, you have to refresh most of the solder points and so on.
And metal boxes with shielding are oftenly rusted, so restoring takes days and days and is an extremely...Leave a comment:
-
Looking for the datasheet of this 5.6uF Elna capacitor
I am looking for the datasheet of this (quite old) Elna capacitor. It is rated 5.6uF/50V, CE85° 0010 (S), the serie is CE-BP(LZ).
Thank you.... -
Re: Reuse the autotransformer of a 220-110V stepdown
40W should be enough as this unit will be used mainly for testing.
I have another one but it is sealed. Planning to open it with wires intact so you guys can check if it is indeed reusable without the circuit.Leave a comment:
-
Re: Improving CRT geometry by upgrading capacitors
Because the quality of the picture, its contrast, the blacks, the colours and the sharpness beats hands down the quality of any LCD I've encountered so far.
Obtaining a perfect geometry is howewer almost impossible.
You have to either:
1) Restrict the picture horizontally, obtaining an almost acceptable geometry, leaving black borders on both left and right.
2) Enlarge the picture, which exposes unlinearities on the edges of the tube, but no black borders.
So, you have to accept...Last edited by Hitto; 04-14-2020, 07:01 AM.Leave a comment:
-
Re: Reuse the autotransformer of a 220-110V stepdown
Yes, it automatically switches between 110 and 220VAC.
This is a close-up of the unit:
I was hoping to use the transformer without the circuit as the PCB has too many lifted pads....Last edited by Hitto; 04-13-2020, 01:29 PM.Leave a comment:
-
Re: Reuse the autotransformer of a 220-110V stepdown
Judging by the connections, but I am not sure about blue wire:
...Leave a comment:
-
Re: Reuse the autotransformer of a 220-110V stepdown
The unit is quite generic and not available currently on eStores for a comparison.
The PCB is marked LLD57/040ASC.
FRONTAL:
REAR:
TRAFO (TRANSFORMER):
They made a mess of wires with identical colours. Howewer the PCB is clearly marked with AC-IN (220V), OUT (110V), OUT (next to 512#)....Last edited by Hitto; 04-12-2020, 09:29 AM.Leave a comment:
-
Reuse the autotransformer of a 220-110V stepdown
I would like to reuse the autotransformer of this device, which converts 220 to 110 and claims to be bidirectional.
This transformer has 0-220V inputs and 3 output wires. One goes to a diode in the PCB, the other one is output, the third goes through a relais which then goes to outputs.
It seems to be a common design in these kind of converters but I can post more photos if needed.
Do you guys know if the autotransformer in these step-down can be used for straight 220-110V conversion, bypassing the circuit?...
No activity results to display
Leave a comment: