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Everything posted by samsie
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Kerry Design mini GRHV\GRLV and JoaMat mini T2 Group Buy
samsie replied to mwl168's topic in Do It Yourself
Boards arrived safely Thanks -
Kerry Design mini GRHV\GRLV and JoaMat mini T2 Group Buy
samsie replied to mwl168's topic in Do It Yourself
paid -
Kerry Design mini GRHV\GRLV and JoaMat mini T2 Group Buy
samsie replied to mwl168's topic in Do It Yourself
Please update my order. 4x GRHVxxx (assembled) 6x GRLV78xx 6x GRLV79xx 2x main board 1x mini t2 board Thanks Sam -
unbalanced/balanced to balanced tube input
samsie replied to kevin gilmore's topic in Do It Yourself
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 -
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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and now for something completely different part 3
samsie replied to kevin gilmore's topic in Do It Yourself
understood. thanks to you all -
and now for something completely different part 3
samsie replied to kevin gilmore's topic in Do It Yourself
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. -
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 https://www.ebay.com/itm/TPS7A3301-Ultralow-noise-LDO-regulator-3V-18V-1V-step-1A-LM337-79x-replace/253593923500 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
- 54 replies
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Mine is sitting on the table. thanks
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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