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KGSSHV Carbon Build Thread

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Try MKS2-.47/63/5T, almost same thing? different price.

Edited by JoaMat

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Pars for the golden ref HV on both my blue hawaii builds and my current mini T2 build I used the  gerbers from the file kgsshvpssicfetdual2new This board does not have the cpc117n for the delayed start - but you can implement it via external relays. I made my own bom for it. Note you will need to change a couple of resistors if you dont want +-400V also if you are going golden reference dual LV you dont need the parts for the simple +-15V, the voltage regs,  this are marked on the bom as for low voltage section. Hope this helps. On the silkscreen the caps are 0.047uF 1KV not 0.47uF, So you might be looking at a different board from the golden ref HV I used.

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Mfr. No: C2M1000170D
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Mfr. No: STN9360
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Mfr. No: 2N3904TA
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Mfr. No: BC557BTA
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Desc.: Bipolar Transistors - BJT TO-92 PNP GP AMP
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Mfr. No: KSC5026MOS
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Mfr. No: DN2540N5-G
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Desc.: MOSFET 400V 25Ohm
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Mfr. No: LT1021DCN8-10#PBF
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Mfr. No: NJM7815FA
Manufacturer: NJR
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Mfr. No: NJM7915FA
Manufacturer: NJR
Desc.: Linear Voltage Regulators -15V 1.5A 3 Terminal
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Lifecycle: icon-lc-endoflife.pngEnd of Life: Scheduled for obsolescence and will be discontinued by the manufacturer.
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Mfr. No: MF1/2CC1000F
Manufacturer: KOA Speer
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Mfr. No: MF1/2CC1001F
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Mfr. No: MF1/2CC1003F
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Mfr. No: MF1/2CC1502F
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Mfr. No: MF1/2CC2001F
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Mfr. No: MF1/2CC2002F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 20Kohms 1% 50PPM
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Mfr. No: RN60D3903FB14
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/4watt 390Kohms 1% 100ppm
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Mfr. No: MF1/2CC2493F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 249Kohms 1% 50PPM
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Mfr. No: MF1/2CC4701F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 4.7K 1% 50PPM
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Mfr. No: MF1/2CC4992F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 49.9Kohms 1% 50PPM
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Mfr. No: MF1/2CC49R9F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 49.9ohms 1% 50PPM
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Mfr. No: MOSX3CT521R5R1J
Manufacturer: KOA Speer
Desc.: Metal Oxide Resistors RSS3 5.1 5%TR
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Mfr. No: MFS1/2DCT52R3011F
Manufacturer: KOA Speer
Desc.: Metal Film Resistors - Through Hole 1/2W3.01K ohm 1%
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Mfr. No: RN60D8063FB14
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/4watt 806Kohms 1% 100ppm
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Mfr. No: VR37000004704FR500
Manufacturer: Vishay
Desc.: Metal Film Resistors - Through Hole 1/2watt 4.7Mohms 1%
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Mfr. No: MKP10-.047/1000/5
Manufacturer: WIMA
Desc.: Film Capacitors 1000V .047uF 5% PCM15
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Mfr. No: MKS4O131004J00KSSD
Manufacturer: WIMA
Desc.: Film Capacitors 1KV 0.1uF 10% PCM15
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Mfr. No: TAP476K035CCS
Manufacturer: AVX
Desc.: Tantalum Capacitors - Solid Leaded 35V 47uF 10% ESR=800 mOhm
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Mfr. No: 561R10TCCV50
Manufacturer: Vishay
Desc.: Ceramic Disc Capacitors 1Kvolts 5pF 5% .25LS NPO
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Mfr. No: EEU-FR1E101
Manufacturer: Panasonic
Desc.: Aluminium Electrolytic Capacitors - Radial Leaded 25VDC 100uF 6.3x11.2mm LS2.5mm
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Mfr. No: EKYB350ELL472ML40S
Manufacturer: United Chemi-Con (UCC)
Desc.: Aluminium Electrolytic Capacitors - Radial Leaded 35V 4700uF 20% Tol.
RoHS RoHS Compliant
 
 - - Add new for low voltage secti 2 
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Mfr. No: 1N5927BRLG
Manufacturer: ON Semiconductor
Desc.: Zener Diodes 12V 3W
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Mfr. No: 1N5934BG
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Desc.: Zener Diodes 24V 3W
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Mfr. No: 1N5952BRLG
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Desc.: Zener Diodes ZEN SUR30 REG 3W
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Mfr. No: Z4KE150A-E3/73
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Mfr. No: 1N4007G
Manufacturer: ON Semiconductor
Desc.: Rectifiers 1000V 1A Standard
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Mfr. No: STTH512FP
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Mfr. No: 110-13-308-41-001000
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Mfr. No: 5452257
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Mfr. No: EA-T220-38E
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Edited by jamesmking

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Pars, here is my reverse engineering of the kgsshvpssicfetdual2new I have added in red the extra parts for the delayed turn on but there are no pads present on the gerbers for them. As far as I can tell the dual hv boards stopped at version 1.7 just before the cpc117n was added. the individual "left" and ""right" boards went to version 1.8 - which included the cpc117n and the 600ohm resistor.

 

kg ss hv dual soft start clean.JPG

Edited by jamesmking

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I just finished building the KGSSHV Carbon and Golden reference PSUs, well, using the PCBs from AliExpress. The performance is superb. It registers 0.0006x% THD+N up to 583Vrms and the distortion profile is very well behaved (2nd order slightly higher than 3rd order). The noise floor is at 1.1mVrms wide-band without power-line frequency harmonics. I found that my comfortable listening level is around 10Vrms and would probably never need that kind of dynamic headroom. Is there a lower gain option or mod that can bring the noise down?

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Congratulations to your successful build of the Carbon. The world needs more good amplifiers.:)

Do you mind post some images?

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I built the amp on a heat sink taken from an old Denon home theater receiver, and decided to try it out before investing more time and $$ on a 'real' enclosure. It just so happens that the heat sink has the exact length for two boards mounted side-by-side, and width to mount the transistors on both the PSU and amp boards. The big electrolytic caps are mounted on the opposite side of the PSU board to double as temporary mechanical support. You can see the green Soviet military style HV transformer. I got it a number of years ago on ebay when the international shipping wasn't that crazy. It's better suited for circuit requiring 400V or 350V B+, though.

IMG_1144.thumb.jpg.bdb21d6c549b6f15aae5685496c1cb27.jpg

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Thanks for image. Indeed very creative built. No need  for fancy cabinet I’d say, unless you have children or cats. Maybe an IR module with the motorized potentiometer for remote convenience.

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Oh I'll definitely put these in a proper enclosure with volume control and input selection, etc. This is just temporary.

By the way, do you have any suggestions to reduce the gain? Increasing the NFB would certainly do it. I'm more looking for a way to reduce the open loop gain I guess.

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Looking forward a glimpse of your final enclosure.

I’ve no suggestions regarding reducing the gain.  Maybe there are folks out there that have.

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