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Kerry last won the day on August 7 2016

Kerry had the most liked content!

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About Kerry

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    High Roller
  • Birthday 06/18/1963

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    New York, NY


  • Location
    New York, NY
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    Electronics, Drums, Guitar, Golf
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    Software Developer
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    STAX SR-404, O2 Mk I
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    DIY Blue Hawaii, DIY KGTT, DIY DynaT
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    Classe CA-200, Magnepan MG-1.5

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  1. When there is a short, it is one of the first parts to blow along with the transistor it's connected to. Under normal operating conditions, it really isn't an issue.
  2. I was worried about the few through hole parts, in particular the 3w resistor used in the current limiter. Without that, it's much easier, but still tight.
  3. I was thinking about it as I was doing the LV one. I bet I can get it close to that size wise. I'll add it to my list, so definitely not by end of day Maybe do the T2 PS style current limiting, which is better at handling shorts. Let me know what you think.
  4. Happy Birthday!
  5. So I think this is pretty cool (sorry to toot my own horn, but I can't help it sometimes ). I've been meaning to miniaturize the GRLV supplies. I've got them down to boards that are 1.16" (H) x .8" (W). The output transistor mounts to the board and you can mount it directly to heat sinks. They are designed as LM78xx and LM79xx except with a TO-247 footprint. This means you'll still need the supporting components (bridge, diode and a few caps) that are found on the current boards. Here's what they'll look like... Note that the pass transistor will be folded up on to the board and you'll need to put some mounting pins in. I've made it so it is the same size as a standard horizontal TO-247 mount. EDIT: Note that there are set resistors are on the board (R2, R3) so the boards act like fixed regulators in the circuit.
  6. Looks good. Just a couple of safety thoughts. You should try to put the fuse holder with fuse back in. Also, I'm not sure if you've tied the chassis to earth, but you should do that too. Nice looking chassis. Enjoy
  7. Here's a rough BOM. You'll need to double check things. Patterns are not necessarily correct, but part numbers probably are pretty close. Use this as a guide... ID RefDes Pattern Name Value Vendor Part Number Quantity 100 A5 Bridge HV BRIDGE BR GBU-610 1 101 AC-IN2 Mate-N-Lok 2 Connector 2 Pin 325VAC sames series as 3 pin 1 102 DC-OUT Mate-N-Lok 3 Connector 3 Pin 571-1-770170-0, 571-1721661, 571-770988-1 1 103 AuxPwr, PWR-IND Header 1x2 Connector 2 Pin 2 104 C1 CAP_2815 47uF 80-T491D476K020 1 105 C11 Cap 22.5PS 10.5x22.5 .22uF B32913A5224M 1 106 C13 Cap 22.5PS 10.5x22.5 .33uF 505-MKS4.33/1000/10 1 10 C14, C16 Cap 15PS 9x18 0.1uF 505-MKS4.1/1000/10 2 108 C23 CAPPR-10/35h20 330uF 594-MAL215959181E3 1 9 C25 Cap 15PS 9x18 47nF I used 100pF instead 1 110 C26 Cap Pol 10PS 25D 220uF 80-ELG157M450AR4AA 1 16 C27 CAP_1206 5pF 581-12067A5R6CAT2A 1 112 C36 Cap Pol 2.5PS 6.6D 470uF 647-UVR1A471MED 1 113 C40 Cap Pol 2.5PS 6.6D 47uF 667-EEA-GA1A470H 1 25 D12, D13, D23, D25 SMA FM4007 4 27 D14 SMA 130V 1SMA130Z 1 29 D15, D16, D17 SMA 150V 1SMA150Z 2 25 D20 SMA 1N4004 FM4007 1 26 D22 SMA 24V 1 24 D24 SMA 15V 1 121 Q10 TO-220 FQPF8N80C FQPF8N80C 1 41 Q13 SOT23-5 HN4A51J 1 36 Q15, Q16 TO-220 KSC5026 KSC5026 2 44 Q21 SOT23 MMBT3904 MMBT3904 1 44 Q31 SOT23 MMBT3904 1 45 Q32 SOT23 MMBT3906 MMBT3906 1 39 Q36 SOT223-4 STN9360 STN9360 1 43 Q37 SOT89 DN2540 DN2540 1 54 R1, R41, R29, R30 RES_1206 3K 4 130 R2 RES_1206 600 667-ERJ-8ENF6040V 1 131 R3, R38, R78 RES_1206 1K 71-TNPW12061K00BEEN 3 55 R25 Res500LP 50K 1 56 R26 Res500LP 1M 1 57 R27 Res500LP 4.7M 1 136 R29, R30 RES_1206 100K 71-TNPW1206100KBEEN 2 60 R31 Res500LP 10M 1 138 R36 Res500LP 4 71-CPF33R3000FKRE6 1 139 R37, R42 RES_1206 390K 71-TNPV1206390KBEEN 2 49 R39 RES_1206 2K 1 48 R40 RES_1206 100 1 143 R43, R46 RES_2512 330K & 390K 300K 2 144 R44 RES_1206 20K 71-TNPW120620K0BEEN 1 53 R45 RES_1206 50K 1 65 R65 RES_0805 100K 1 67 R70 RES_0805 20K RG2012P-203-D-T5 1 68 R72 RES_0805 10K RG2012P-103-D-T5 1 69 R73, R75 RES_0805 2K RG2012P-202-D-T5 2 70 R74 RES_0805 3.3K RG2012P-332-D-T5 1 61 R79 RES_1206 4.7K 1 152 U1 SOIC-8/150mil D LT1021DCS8-10 1 153 U2 CPC1117N CPC1117N 1 154 U3 TO-220 10M90S IXCP10M90S 1 155 U8, U14 TO-220 IXCP10M90S 2 156 U11 SOIC-14/150mil CD4093 595-CD4093BM 1 157 VR1 POT T93B 50K 652-3266W-1-503LF 1 Here's the schematic: SingleRailGRLV400V.pdf SingleRailGRLV400V-2.pdf EDIT: I made some tweaks to the PS. I'll need to see what I did. I think I added some extra capacitance.
  8. These boards have extra circuitry for the delay timer, which is not needed on the Carbon. I'd have to see if I can dig up a bom. Not sure if I published it earlier.
  9. Happy birthday!
  10. Happy Birthday!
  11. Very nice John! I have dxf files for the front and back plates. I'll see if I can get them published.
  12. Happy Birthday Colin
  13. Happy Birthday Steve!
  14. Happy Birthday!
  15. That's why I put the 0 ohm resistors in