samsie
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Posts posted by samsie
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Please update my order.
4x GRHVxxx (assembled)
6x GRLV78xx
6x GRLV79xx
2x main board
1x mini t2 board
Thanks
Sam
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Dear Kevin,
I find the heater power supply portion to be rather handy.
Would you please cut the HV supply portion away so that I can use the heater power supply portion for mini T2 project?
Thanks
Sam
On 11/13/2017 at 7:45 AM, kevin gilmore said:board files for you
updated including 100v massive overkill power supply
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The amp was getting really hot at 70°C. It was running at 22.5 mA. I have to reduce the bias current. Should I change the 2k ohm resistor or the 500k one? I am a bit confused.
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understood. thanks to you all
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CFA2 (CFP) - current feedback amp
I still cannot figure out how to connect them into balanced version of CFA2 (CFP) - current feedback amp as they are single end type of pcb.
I know I need four boards, but how do I connect the negative input rail ?
Your help is much appreciated.
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And how do you do the printing?
Sam
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This was completed an hour ago. It worked though I did not do any measurement. I tried it with my only planar Hifiman HE6. The volume was a dummy. I used a preamp. I could not afford a decent volume control for individual headamps.
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One set for me, please
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thanks all,
I ordered.
I know I'll have to handle SMD sooner or later. In the mean time, I am searching on the web regarding how to mount the TPS7A3301 and TPS7A4001 directly on the board.
Maybe I could finish it before the modules arrive?
Sam
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Please help me with the TPS7A3301 modules, I could only find this
It appears that it could only provide -18v, not the -20. Am I missing something?
After spending half a day staring at the pcb without any progress. I gave up on soldering the chips to the board by myself.
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Payment sent.
thanks
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agree, yes, four sets power supplies, many projects to be completed.
I changed the quantity to 2 sets
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sorry, a bit too much for me. Maybe I would join in when there is a group buy for a set of transformers
sam
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I am interested in the chassis set. I would like to have an estimation before I commit.
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two sets of GRHV split, please
Sam
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I used a 9v battery and a multi-meter. connect the 9v battery to the primary temporarily and see the fluctuated secondary output voltage to be positive or negative. then you know which way to go.
I have not tried the KG methods but it appears to be very convenient.
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combined ship will be great
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arrived today in a huge envelop.
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I would like to combined shipping with attenuator boards .
I tried the spread sheet. It cannot be changed. I guess it is locked
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Mine is sitting on the table.
thanks
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On 2016/1/18 at 7:57 PM, kevin gilmore said:
It does about 1.5 amps
there will be a higher voltage one soon that does 6 amps
Does the goldenreference low voltage provide enough juice for Dynahi? Use two for the Dynahi? I plan to make the Dynahi for the use of HiFiman HE-6.
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I am trying to make a power supply for my Auralic Aries mini. .
The original one is labelled "switching PS 16v 1A"
Any idea if the goldenreference can be used for such high current?
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I am in for a set, please
Kerry Design mini GRHV\GRLV and JoaMat mini T2 Group Buy
in Do It Yourself
Posted
Boards arrived safely
Thanks