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Everything posted by chinsettawong
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Kerry Design mini GRHV\GRLV and JoaMat mini T2 Group Buy
chinsettawong replied to mwl168's topic in Do It Yourself
@mwl168I do not need the mini T2 boards as I've got some already. Thanks for putting me in for those PS boards though. -
3 sets for me.
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Is the GB going to be the fully assembled ones?
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@JoaMat Do you recommend that we use the original T2 voltages or +400V/-460?
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From the schematic, the mini T2 will be using +220V, +400V, -460V, +15V and -15V. I'm thinking of using the PS board from my prior KGSSHV build. Is it possible to use a simple voltage divider to get the +220V from +400V? How much current does each voltage draw?
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Could you kindly share the Gerber files? Or are there anymore boards to be grabbed?
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Interesting. How is the sound as compared to the full size T2?
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Very nice looking earpads.
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They don’t look like DIY to me. Well done! Can you tell us more about it? What is the dimension of the driver?
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Really like to see the inside of the headphones.
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Megatron Electrostatic Headphone Amplifier
chinsettawong replied to kevin gilmore's topic in Do It Yourself
Wow! Very, very nice! -
I'm sorry, but what I meant to ask was did you have the driver's dimension?
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Thanks for sharing those nice pictures. The driver looks so much like my JF clone drivers. Do you have its measurements?
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Very nice build! Do you mean that you like the sound of GG better than BH?
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What kind of stone is it? I kind of like the lava stone table top. It should be cheap there in Iceland.
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Unless the diaphragm is stuck to one of the stators, hitting the headphones probably won’t help.
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Interesting. I don't know how one can drill holes like that.
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Take it apart and show us some inside pictures, please.
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Have you tried resolder all the joints? If nothing helps, you might want to try recoating the diaphragm.
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Happy belated birthday Birgir. Wish you could come to visit me in Bangkok someday.
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Happy birthday!
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Happy birthday!
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Thank you so much for all your advices. I've finally fixed the problem. The C2M1000170 and 10M90S on my board have gone bad for some reasons. I replaced C2M1000170 with a SCT3080KLGC11 from a local store, and luckily it worked. I parallel the 5R with one more 5R, and now the power supply is working perfectly. The amp has been running for at least 2 hours with no problem. I couldn't have fixed it without your help, Kevin, Blueman2, and Soren. Thanks again.
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The voltage was about 465V without load. Took out the 2n3904 and connected the amp board. Fired the amp up and the B+ became around -12V. Switched it off and the voltage gradually came up to around 45V then went down to 0. Can I try to change some R to increase the current limit a bit more instead of taking the 2n3904 out?
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I need a little help here. When the amp is running, my B+ voltage keeps on swinging between 370-410V while B- is stable at 465V. Is my B+ supply running out of juice? What can I do to fix? I'm using this PS board.