Re: What are the best caps for AC coupling a video signal?
Thank you for the information. Then I'll continue using Panasonic FC.
Y. Signal
Senior Member
Last Activity: 12-06-2020, 07:16 AM
Joined: 04-10-2018
Location: South Spain
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Re: What are the best caps for AC coupling a video signal?
Thank you. My reason to replace aluminum electrolytics with polymers is reliability, endurance and lower ESR.
My circuit uses the example in the THS7374 datasheet for AC coupled output (page 25): [url]https://cdn.badcaps-static.com/pdfs/aa2cbc9f28df88204f838d7cc648ca74.pdf[/url] (330uF capacitors polarity is wrong in this schematic).Re: What are the best caps for AC co...ance and lowerLast edited by Y. Signal; 11-06-2019, 01:46 PM.Leave a comment:
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What are the best caps for AC coupling a video signal?
Hello.
I'm currently using 6.3V 330uF Panasonic FC capacitors for AC coupling a 75 ohm impedance video signal coming from a THS7374. They work fine, but I like to improve my designs so I'm considering using better ones.
I wonder if polymer capacitors would be better for my application. If so, I'd like to know what parameters I should look for to make a good choice. -
Re: Recapping Mean Well MWP-606
I got a reply from Rubycon. They say that as a result of verification at their Quality Department, the product of the photograph was manufactured by them. As Wester547 said, No. S1650 is made in Japan factory and No. 3M1807 is made in Indonesia factory.
I finished the recap and the power supply works very nice. Thank you all for your help....Leave a comment:
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Re: Recapping Mean Well MWP-606
Nice idea, I'll contact them. In the photos they don't look that bad. The plastic and printing makes them look like a knock-off, in some respects they remember me to bad quality chinese caps....Last edited by Y. Signal; 03-05-2019, 11:51 AM.Leave a comment:
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Re: Recapping Mean Well MWP-606
I have replaced the two Samxon LP 220uF 250V with Rubycon VXH 390uF 250V instead of Nippon Chemi-con KMQ 220uF 250V. They are only 1cm larger so they fit well in the case.
I have replaced the Rubycon YXG 3300uF 10V and it looks cheaper to my eyes compared to the replacements I have received from Farnell. What do you think? I attach some photos, the Rubycon from the board is at the right. I'd say it's fake.
I'm still waiting for the pannies FC from RS to finish the recap....Leave a comment:
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Re: Conductive pen or glue or?
I've tried conductive pen to repair remote controls and it wears off. Aluminum foil tape worked perfectly for me.Leave a comment:
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Re: Recapping Mean Well MWP-606
Great, thank you again. I also plan to replace 1 Rubycon YXG 3300μF 10V with the same model from Farnell since I suspect it may be fake.Leave a comment:
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Re: Recapping Mean Well MWP-606
Thank you so much. What about Rubycon YXM for the small caps? they are rated 10.000 hours @ 105ºC.
For the filters I'll get Nippon Chemi-Con KMS 330μF 250V (22x30mm with 10mm between terminals), they fit perfectly in the case.Last edited by Y. Signal; 03-04-2019, 03:30 AM.Leave a comment:
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Re: Recapping Mean Well MWP-606
Thank you, I'll replace the solder of that adjuster to avoid future problems.
Those two big capacitors seem to be input filter, I have found this replacement: Nippon Chemi-con KMQ 220μF 250V (22x25 with terminal spacing of 10mm). Since I run at 230V I'd prefer KMQ 220uF 400V but they don't fit in the case.
Reading the datasheet I understand that Rubycon YXM are Standard capacitors but long life, so they'd be appropiate for General Purpose applications too. Is this correct?Leave a comment:
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Re: Recapping Mean Well MWP-606
Yes. It's currently sold by Suzo (model 42PP0606) and it's labeled as Prima Power MWP-606.Leave a comment:
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Re: Recapping Mean Well MWP-606
Thank you for the information. This PSU will not be enclosed and most of the time it will be turned off, so I suppose these caps will do fine. I'll look into automotive grade (Rubycon YXM?) anyway since I always look for the most reliable components.
I made an error in my first post, for 1uf 50V I'll use Rubycon YXF or Rubycon YXM (Ripple: 25) instead of Jamicon TK 1uF 50V (Ripple: 17). Rubycon PX's ripple current for this value is 10. Also, Rubycon YXM 22uF 50V 5x11 (135 ripple) instead of Capxon GS 22uF 50V (100 ripple)Last edited by Y. Signal; 03-03-2019, 01:17 PM.Leave a comment:
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Recapping Mean Well MWP-606
Hello, I have this arcade power supply that I'd like to recap for maximum reliability and lifetime since I have found some Capxon and Jamicon capacitors:
[LIST][*]Capxon GL 10x25 1000uf 16V Ripple: 1180 Impedance: 0.05ohm // Chemi-con KY 1000uf 16V Ripple: 1400 Impedance: 0.046ohm[*]Capxon GL 10x12.5 470uf 16V Ripple: 722 Impedance: 0.095ohm[*]Capxon GS 10x15 22uf 50V 85ºC Ripple: 100 [*]Capxon KM 47uf 50V Ripple: 125 [*]Jamicon TK 1uf 50V Ripple: 12[*]Jamicon TK 4.7uf 50V Ripple: 36[/LIST]
I have another PSU (same model) that uses Chemi-con KY instead of Capxon GL, and since Panasonic... -
Re: Looking for a reliable +5V and +12V PSU with low ripple
Hi, I want to reduce ripple and noise to prolong the life of the arcade boards since they are very old. With some boards that are not so well built in some analog TVs I have observed some wavy noise across the screen, not sure if that's due to the RT-125A.
Would a line filter help with this? could you recommend me one, or what features or certifications should I look for?Last edited by Y. Signal; 11-21-2018, 03:08 AM.Leave a comment:
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Looking for a reliable +5V and +12V PSU with low ripple
Hello. I'd like to get suggestions for a reliable PSU with good caps and low ripple with +5V (adjustable), +12V and optionally -5V. I don't really need the -5V but it would be nice to have this output too.
I've read good things about the Meanwell MWP-606A with 50mV ripple for the +5V output (the most important for my application) so I've called to an official distributor. Sadly this PSU is not produced anymore and the replacement they suggest me (TP-100A) has 100mV ripple noise, more than the 80mV of the RT-125A I'm currently using.
Apart from this second PSU I plan... -
Re: Capcom CPS1 with Unicon and Tk capacitors
Thanks. I was looking to get a working CPS1 board and this is good to hear since I don't plan to use it enclosed. Yeah, I heard about that Z80 issue and I already got some Z80A replacements
I got this board as seen in the photo and I've not tested it yet since it lacks some 74LSxx integrated circuits so I have to solder them first, and I also need B+C boards... dunno if just connecting the A board gives some useful output. Any other think like check for short circuits or voltages in the connectors to check before plugging...Last edited by Y. Signal; 11-11-2018, 02:22 PM.Leave a comment:
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Capcom CPS1 with Unicon and Tk capacitors
Hello. I have a broken Capcom CPS1 A board that uses Unicon and Tk capacitors. These electrolytics are only in the audio section of the circuit, the rest of the board has ceramic capacitors and tantalums. In my experience the Tk are almost always way out of spec.
I wonder if these capacitors may damage other parts of the circuit in spite of being only in the audio section. I've read that the custom chip CPS-A-01 has an exceptionally high failure rate, would be possible that these capacitors affect it when the board is running? apart from the risk of electrolyte leaking, would be electrically... -
Re: Power supply build quality pictorial. part 2
[B]Mean Well RT-125A[/B]
All the capacitors I can see are Rubycon and Chemi-con, except one small Jamicon near the outputs.Re: Power supply build quality pictorial. part 2
[B]Mean Well RT-125A[/B]
All the capacitors I can see are Rubycon and Chemi-con, except one small Jamicon near the outputs.Re: Power supply build quality pictorial. part 2
[B]Mean Well RT-125A[/B]
All the capacitors I can see are Rubycon and Chemi-con, except one small Jamicon near the o...Leave a comment:
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Re: Sony SRS-A205 and non-polarized electrolytic capacitors on audio input
Yes it does, thanks!Leave a comment:
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Sony SRS-A205 and non-polarized electrolytic capacitors on audio input
Hello. I have this set of speakers that I'm recapping because they had some noise. After replacing most of the electrolytic capacitors the problem dissapeared, but I've continued working for a full recap since they are rated 85ºC even the ones placed next to a heatsink.
After removing them I've noticed that in the audio input there are 3 non-polarized electrolytic capacitors in series for ground, left and right, just after the audio jack. I don't stock this type of capacitors, could I replace them with polarized caps?Last edited by Y. Signal; 10-13-2018, 07:51 AM.
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