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Power supply options for tube preamp
Power supply options for tube preamp
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Old 3rd December 2017, 04:58 PM   #11
Rootz is offline Rootz
diyAudio Member
 
Join Date: Jan 2010
Did you have the opportunity to take some measurements or see some more details of the module? Which controller is used? Switching freq? Etc, etc.

Oh and thanks for all the replies by the way!
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Old 4th December 2017, 02:35 PM   #12
kodabmx is offline kodabmx  Canada
diyAudio Member
 
Join Date: Oct 2011
Location: Toronto
I've used these. They are isolated, however they are adjustable which causes instabilities and oscillation if used with a choke input/crappy load.

I have used:

DC-DC 8-32V to 45-390V Step Up Power Supply Module High Voltage ZVS Boost Module | eBay

Not isolated, single ended design. I use one for powering a phono stage. More stable than the above.

DC-AC Converter 12V to 110V 200V 220V 280V 150W Inverter Boost Board Transformer | eBay

I prefer this design. It's isolated. I use them with a voltage doubler on the AC output to get 420V.

MINI DC-AC Inverter 12V to 18V220V/380V 500W Boost Step UP Power Module New Hot | eBay

I use these for power amplifiers. I'm using one to power a PP 6550 Amp. Runs with a 10 - 15 degree rise at 150W output.
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Old 6th December 2017, 09:08 AM   #13
Kay Pirinha is offline Kay Pirinha  Germany
diyAudio Member
 
Join Date: Oct 2011
Location: Somewhere in Germany
Take an AC to 12V converter that can handle your preamp's total power consumption. Tweak it to get 12.6 Vdc and feed the tubes' heaters and a DC to DC converter with isolated output for HV supply. Elevate your 12.6 Vdc by means of a voltage divider at the HV side. That's all. I can't see any problems with this, given that the HV converter is isolated.


Best regards!
__________________
"Bless you, Sister. May all your sons be bishops." (Brendan Behan)
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Old 11th December 2017, 10:04 AM   #14
Rootz is offline Rootz
diyAudio Member
 
Join Date: Jan 2010
What got me confused is how feedback from the HV supply would work. The output is isolated from a floating input via a fly back transformer. But the feedback path might or might not be isolated (if there is any feedback at all). I guess I will have to see how the feedback is done on an actual supply.
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Old 11th December 2017, 10:13 AM   #15
Rootz is offline Rootz
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Join Date: Jan 2010
Like this
Attached Images
File Type: png Screen Shot 2017-12-11 at 11.12.41.png (482.6 KB, 50 views)
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Old 12th December 2017, 04:20 PM   #16
MorbidFractal is online now MorbidFractal
diyAudio Member
 
Join Date: Nov 2017
Quote:
Originally Posted by Rootz View Post
It would be great if you could make an idealised model, but please remember that it might just be for educational purposes.
Apologies for the delay. Education is good. I'm getting some as I try to get the beast to work whilst dealing with competing issues.

I've assumed 1 X 420V@ 50mA and 2 X 12.6V @ 750mA. About 40W. I have also assumed that you might use a Laptop brick. You can get 70W ones with 19V out and they are cheap.

That takes care of your mains isolation but you should still be concerned about safety in respect of your 420V.

The following #CODE is the LTSpice model. Save as an .asc file and LTSpice should load it and let you poke about and play. Again this is not final but a closest best and possibly realisable guess.

Pictures are circuit, circuit in regulation, circuit with a 20mA/50mA load transient on the 420V rail and start up as things come into regulation.

There are reasons why it behaves the way it does and other than a load of other headaches some anomalous behaviour that could need chasing down.

I'll try some more words later.

Code:
Version 4
SHEET 1 3248 1352
WIRE 1664 -224 1232 -224
WIRE 144 -160 16 -160
WIRE 256 -160 224 -160
WIRE 352 -160 256 -160
WIRE 560 -160 432 -160
WIRE 672 -160 560 -160
WIRE 1056 -160 976 -160
WIRE 1184 -160 1120 -160
WIRE 1232 -160 1232 -224
WIRE 1232 -160 1184 -160
WIRE 1264 -160 1232 -160
WIRE 1376 -160 1344 -160
WIRE 1504 -160 1376 -160
WIRE 1632 -160 1504 -160
WIRE 1664 -160 1632 -160
WIRE 1856 -160 1776 -160
WIRE 1984 -160 1920 -160
WIRE 2032 -160 1984 -160
WIRE 2064 -160 2032 -160
WIRE 2176 -160 2144 -160
WIRE 2304 -160 2176 -160
WIRE 2336 -160 2304 -160
WIRE 2560 -160 2480 -160
WIRE 2688 -160 2624 -160
WIRE 2736 -160 2688 -160
WIRE 2768 -160 2736 -160
WIRE 2880 -160 2848 -160
WIRE 3008 -160 2880 -160
WIRE 3040 -160 3008 -160
WIRE 160 -80 160 -112
WIRE 160 -80 128 -80
WIRE 208 -80 208 -112
WIRE 976 -80 976 -160
WIRE 1056 -80 976 -80
WIRE 1152 -80 1120 -80
WIRE 1776 -80 1776 -160
WIRE 1856 -80 1776 -80
WIRE 1952 -80 1920 -80
WIRE 2480 -80 2480 -160
WIRE 2560 -80 2480 -80
WIRE 2656 -80 2624 -80
WIRE 560 -48 560 -160
WIRE 672 -48 672 -160
WIRE 976 -48 976 -80
WIRE 1232 -48 1232 -160
WIRE 1776 -48 1776 -80
WIRE 2032 -48 2032 -160
WIRE 2480 -48 2480 -80
WIRE 2736 -48 2736 -160
WIRE 1376 -32 1376 -160
WIRE 1504 -32 1504 -160
WIRE 2176 -32 2176 -160
WIRE 2880 -32 2880 -160
WIRE 16 48 16 -160
WIRE 560 64 560 32
WIRE 560 64 480 64
WIRE 672 64 672 32
WIRE 752 64 672 64
WIRE 976 64 976 32
WIRE 1056 64 976 64
WIRE 1152 64 1152 -80
WIRE 1152 64 1120 64
WIRE 1776 64 1776 32
WIRE 1856 64 1776 64
WIRE 1952 64 1952 -80
WIRE 1952 64 1920 64
WIRE 2480 64 2480 32
WIRE 2560 64 2480 64
WIRE 2656 64 2656 -80
WIRE 2656 64 2624 64
WIRE 256 128 256 -160
WIRE 480 128 480 64
WIRE 560 128 560 64
WIRE 672 128 672 64
WIRE 752 128 752 64
WIRE 432 144 400 144
WIRE 832 144 800 144
WIRE 976 144 976 64
WIRE 1056 144 976 144
WIRE 1184 144 1184 -160
WIRE 1184 144 1120 144
WIRE 1232 144 1232 16
WIRE 1504 144 1504 32
WIRE 1632 144 1632 -160
WIRE 1776 144 1776 64
WIRE 1856 144 1776 144
WIRE 1984 144 1984 -160
WIRE 1984 144 1920 144
WIRE 2032 144 2032 16
WIRE 2304 144 2304 -160
WIRE 2480 144 2480 64
WIRE 2560 144 2480 144
WIRE 2688 144 2688 -160
WIRE 2688 144 2624 144
WIRE 2736 144 2736 16
WIRE 3008 144 3008 -160
WIRE 16 256 16 128
WIRE 256 256 256 192
WIRE 256 256 16 256
WIRE 320 256 256 256
WIRE 432 256 432 192
WIRE 432 256 400 256
WIRE 480 256 480 208
WIRE 480 256 432 256
WIRE 560 256 560 192
WIRE 560 256 480 256
WIRE 672 256 672 192
WIRE 672 256 560 256
WIRE 752 256 752 208
WIRE 752 256 672 256
WIRE 800 256 800 192
WIRE 800 256 752 256
WIRE 1152 256 1152 64
WIRE 1152 256 800 256
WIRE 1232 256 1232 224
WIRE 1232 256 1152 256
WIRE 1376 256 1376 32
WIRE 1376 256 1232 256
WIRE 1504 256 1504 224
WIRE 1504 256 1376 256
WIRE 1632 256 1632 224
WIRE 1632 256 1504 256
WIRE 1952 256 1952 64
WIRE 1952 256 1632 256
WIRE 2032 256 2032 224
WIRE 2032 256 1952 256
WIRE 2176 256 2176 32
WIRE 2176 256 2032 256
WIRE 2304 256 2304 224
WIRE 2304 256 2176 256
WIRE 2656 256 2656 64
WIRE 2656 256 2304 256
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WIRE 2736 256 2656 256
WIRE 2880 256 2880 32
WIRE 2880 256 2736 256
WIRE 3008 256 3008 224
WIRE 3008 256 2880 256
WIRE 16 288 16 256
WIRE 48 288 16 288
WIRE 3008 288 3008 256
WIRE 128 384 16 384
WIRE 256 384 208 384
WIRE 384 384 320 384
WIRE 416 384 384 384
WIRE 16 480 16 384
WIRE 128 480 16 480
WIRE 240 480 208 480
WIRE 384 480 384 384
WIRE 384 480 320 480
WIRE 16 576 16 480
WIRE 144 576 16 576
WIRE 176 576 144 576
WIRE 288 576 256 576
WIRE 384 576 352 576
WIRE 416 576 384 576
WIRE 688 576 656 576
WIRE 800 576 768 576
WIRE 832 576 800 576
WIRE 992 576 912 576
WIRE 1024 576 992 576
WIRE 1136 576 1104 576
WIRE 1168 576 1136 576
WIRE 1280 576 1248 576
WIRE 1376 576 1344 576
WIRE 1424 576 1376 576
WIRE 1648 576 1552 576
WIRE 1840 576 1648 576
WIRE 1872 576 1840 576
WIRE 2416 576 2176 576
WIRE 1552 608 1552 576
WIRE 2480 608 2448 608
WIRE 2448 624 2448 608
WIRE 2480 624 2448 624
WIRE 2576 624 2544 624
WIRE 2448 640 2448 624
WIRE 2480 640 2448 640
WIRE 2448 656 2448 640
WIRE 2480 656 2448 656
WIRE 144 672 144 576
WIRE 288 672 144 672
WIRE 384 672 384 576
WIRE 384 672 352 672
WIRE 896 672 864 672
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WIRE 1872 672 1840 672
WIRE 2064 672 2032 672
WIRE 2176 672 2176 576
WIRE 2208 672 2176 672
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WIRE 2064 720 2048 720
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WIRE 2416 720 2416 576
WIRE 2416 720 2384 720
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WIRE 832 752 800 752
WIRE 2448 752 2448 736
WIRE 2480 752 2448 752
WIRE 992 768 992 576
WIRE 992 768 896 768
WIRE 1024 768 992 768
WIRE 2448 768 2448 752
WIRE 2480 768 2448 768
WIRE 688 784 656 784
WIRE 800 784 768 784
WIRE 832 784 800 784
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WIRE 240 800 208 800
WIRE 1232 800 1200 800
WIRE 1552 816 1552 688
WIRE 1696 816 1552 816
WIRE 1728 816 1696 816
WIRE 1696 832 1696 816
WIRE 1728 832 1696 832
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WIRE 1952 832 1792 832
WIRE 2576 832 1952 832
WIRE 1696 848 1696 832
WIRE 1728 848 1696 848
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WIRE 1696 864 1696 848
WIRE 1728 864 1696 864
WIRE 2576 864 1792 864
WIRE 208 880 208 800
WIRE 1136 880 1136 576
WIRE 1168 880 1136 880
WIRE 1552 880 1552 816
WIRE 1696 880 1696 864
WIRE 1728 880 1696 880
WIRE 144 896 144 672
WIRE 176 896 144 896
WIRE 1376 896 1376 576
WIRE 1376 896 1232 896
WIRE 1504 896 1376 896
WIRE 1840 896 1840 720
WIRE 2176 896 2176 720
WIRE 2176 896 1840 896
WIRE 2448 896 2448 784
WIRE 2448 896 2176 896
WIRE 2576 896 2448 896
WIRE 384 912 384 672
WIRE 384 912 240 912
WIRE 992 912 384 912
WIRE 1136 912 1072 912
WIRE 1168 912 1136 912
WIRE 176 928 144 928
WIRE 1504 944 1376 944
WIRE 1376 992 1376 944
WIRE 1424 992 1376 992
WIRE 144 1056 144 928
WIRE 176 1056 144 1056
WIRE 384 1056 256 1056
WIRE 560 1056 528 1056
WIRE 16 1088 16 576
WIRE 144 1088 144 1056
WIRE 384 1088 384 1056
WIRE 528 1088 528 1056
WIRE 800 1088 800 784
WIRE 1136 1088 1136 912
WIRE 1376 1088 1376 992
WIRE 1648 1088 1648 576
WIRE 1840 1088 1840 896
WIRE 16 1200 16 1168
WIRE 144 1200 144 1168
WIRE 144 1200 16 1200
WIRE 384 1200 384 1168
WIRE 384 1200 144 1200
WIRE 528 1200 528 1168
WIRE 528 1200 384 1200
WIRE 656 1200 656 784
WIRE 656 1200 528 1200
WIRE 800 1200 800 1168
WIRE 800 1200 656 1200
WIRE 1136 1200 1136 1168
WIRE 1136 1200 800 1200
WIRE 1376 1200 1376 1168
WIRE 1376 1200 1136 1200
WIRE 1552 1200 1552 960
WIRE 1552 1200 1376 1200
WIRE 1648 1200 1648 1168
WIRE 1648 1200 1552 1200
WIRE 1840 1200 1840 1168
WIRE 1840 1200 1648 1200
WIRE 16 1232 16 1200
FLAG 400 144 DRVB
IOPIN 400 144 In
FLAG 832 144 DRVC
IOPIN 832 144 In
FLAG 2288 624 0
FLAG 2288 768 0
FLAG 2576 624 DRVB
IOPIN 2576 624 Out
FLAG 2576 736 DRVC
IOPIN 2576 736 Out
FLAG 3008 288 0
FLAG 208 -80 0
FLAG 128 -80 DRVA
IOPIN 128 -80 In
FLAG 48 288 ISNS
IOPIN 48 288 Out
FLAG 1664 -224 HTFA
IOPIN 1664 -224 Out
FLAG 2336 -160 HEATA
IOPIN 2336 -160 Out
FLAG 2064 672 DRVA
IOPIN 2064 672 Out
FLAG 1952 624 0
FLAG 1872 576 VDD
IOPIN 1872 576 Out
FLAG 1872 768 0
FLAG 2576 864 PWM
IOPIN 2576 864 Out
FLAG 2576 896 CLK
IOPIN 2576 896 Out
FLAG 1424 992 RAMP
IOPIN 1424 992 Out
FLAG 1424 576 VCEA
IOPIN 1424 576 Out
FLAG 656 576 ISNS
IOPIN 656 576 In
FLAG 2496 672 0
FLAG 2496 784 0
FLAG 416 576 VVEA
IOPIN 416 576 Out
FLAG 416 384 HTFA
IOPIN 416 384 In
FLAG 16 1232 0
FLAG 2064 720 DNVA
IOPIN 2064 720 Out
FLAG 3040 -160 HEATB
IOPIN 3040 -160 Out
FLAG 1744 816 0
FLAG 2576 832 CLR
IOPIN 2576 832 Out
FLAG 1664 -160 VHTA
IOPIN 1664 -160 Out
FLAG 1024 768 VCDA
IOPIN 1024 768 Out
FLAG 1200 928 0
FLAG 864 800 0
FLAG 208 944 0
FLAG 240 800 VCC
IOPIN 240 800 Out
FLAG 896 672 VCC
IOPIN 896 672 Out
FLAG 1232 800 VCC
IOPIN 1232 800 Out
FLAG 560 1056 VCC
IOPIN 560 1056 Out
SYMBOL ind2 544 -64 R0
WINDOW 0 -65 45 Left 2
WINDOW 3 -65 69 Left 2
SYMATTR InstName LPA
SYMATTR Value 317
SYMATTR Type ind
SYMATTR SpiceLine Rser=10m
SYMBOL ind2 992 48 R180
WINDOW 0 -64 74 Left 2
WINDOW 3 -81 41 Left 2
SYMATTR InstName LSA
SYMATTR Value 388m
SYMATTR Type ind
SYMATTR SpiceLine Rser=1R
SYMBOL diode 1056 -144 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName DRA
SYMATTR Value DID
SYMBOL diode 1120 -96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName DRB
SYMATTR Value DID
SYMBOL diode 1120 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName DRC
SYMATTR Value DID
SYMBOL diode 1056 160 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName DRD
SYMATTR Value DID
SYMBOL sw 480 224 M180
WINDOW 0 -78 122 Left 2
WINDOW 3 -77 97 Left 2
SYMATTR InstName SPPA
SYMATTR Value MSW
SYMBOL sw 752 224 R180
WINDOW 0 -92 126 Left 2
WINDOW 3 -88 101 Left 2
SYMATTR InstName SPPB
SYMATTR Value MSW
SYMBOL diode 576 192 R180
WINDOW 0 29 89 Left 2
WINDOW 3 34 66 Left 2
SYMATTR InstName DBA
SYMATTR Value DID
SYMBOL diode 656 192 M180
WINDOW 0 21 92 Left 2
WINDOW 3 22 68 Left 2
SYMATTR InstName DBB
SYMATTR Value DID
SYMBOL voltage 16 32 R0
WINDOW 0 36 43 Left 2
WINDOW 3 38 69 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VBUS
SYMATTR Value 19V
SYMBOL Digital\\dflop 2288 624 R0
WINDOW 0 48 -19 Left 2
SYMATTR InstName A2
SYMATTR SpiceLine Vhigh=15V Vlow=0V Td=10n
SYMBOL ind2 688 48 R180
WINDOW 0 -58 66 Left 2
WINDOW 3 -69 43 Left 2
SYMATTR InstName LPB
SYMATTR Value 317
SYMATTR Type ind
SYMATTR SpiceLine Rser=10m
SYMBOL diode 272 192 R180
WINDOW 0 43 45 Left 2
WINDOW 3 73 20 Left 2
SYMATTR InstName DCATCH
SYMATTR Value DID
SYMBOL ind 336 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName LBUCK
SYMATTR Value 50
SYMATTR SpiceLine Rser=10m
SYMBOL sw 240 -160 M270
WINDOW 0 74 96 VLeft 2
WINDOW 3 49 85 VLeft 2
SYMATTR InstName SBUCK
SYMATTR Value MSW
SYMBOL res 416 240 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName RSNS
SYMATTR Value 25m
SYMBOL cap 1216 -48 R0
WINDOW 0 40 22 Left 2
WINDOW 3 43 46 Left 2
WINDOW 123 42 74 Left 2
SYMATTR InstName CFA1
SYMATTR Value 10
SYMATTR Value2 IC=420
SYMBOL res 1216 128 R0
WINDOW 0 39 45 Left 2
WINDOW 3 40 71 Left 2
SYMATTR InstName RDA1
SYMATTR Value 1R
SYMBOL ind2 1792 48 R180
WINDOW 0 -64 74 Left 2
WINDOW 3 -76 49 Left 2
SYMATTR InstName LSB
SYMATTR Value 355
SYMATTR Type ind
SYMATTR SpiceLine Rser=10m
SYMBOL diode 1856 -144 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName DRE
SYMATTR Value DID
SYMBOL diode 1920 -96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName DRF
SYMATTR Value DID
SYMBOL diode 1920 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName DRG
SYMATTR Value DID
SYMBOL diode 1856 160 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName DRH
SYMATTR Value DID
SYMBOL cap 2016 -48 R0
WINDOW 0 40 22 Left 2
WINDOW 3 43 46 Left 2
WINDOW 123 48 72 Left 2
SYMATTR InstName CFB1
SYMATTR Value 1000
SYMATTR Value2 IC=12.6
SYMBOL res 2016 128 R0
WINDOW 0 39 45 Left 2
WINDOW 3 40 71 Left 2
SYMATTR InstName RESRB
SYMATTR Value 10m
SYMBOL voltage 1376 1072 R0
WINDOW 0 38 57 Left 2
WINDOW 3 24 96 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VRMP
SYMATTR Value PULSE(0.5 3.4 0 9.5u 500n 0 10u)
SYMBOL voltage 1840 1072 R0
WINDOW 0 36 53 Left 2
WINDOW 3 24 96 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VCLK
SYMATTR Value PULSE(0 15 10u 1n 1n 500n 10u)
SYMBOL sw 1552 864 R0
WINDOW 0 8 -12 Left 2
WINDOW 3 7 8 Left 2
SYMATTR InstName PWM
SYMATTR Value CMP
SYMBOL res 1536 592 R0
WINDOW 0 37 44 Left 2
WINDOW 3 38 71 Left 2
SYMATTR InstName RDD
SYMATTR Value 1K
SYMBOL voltage 1648 1072 R0
WINDOW 0 37 41 Left 2
WINDOW 3 36 70 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VDD
SYMATTR Value 15V
SYMBOL Digital\\dflop 1952 624 R0
WINDOW 0 48 -19 Left 2
SYMATTR InstName A1
SYMATTR SpiceLine Vhigh=15V Vlow=0V Td=10n
SYMBOL res 1264 560 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R15
SYMATTR Value 30K
SYMBOL res 1120 560 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R12
SYMATTR Value 10K
SYMBOL voltage 384 1072 R0
WINDOW 0 46 47 Left 2
WINDOW 3 49 74 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VREF
SYMATTR Value 5V
SYMBOL res 272 560 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R5
SYMATTR Value 330K
SYMBOL cap 352 560 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C2
SYMATTR Value 82p
SYMBOL cap 352 656 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C3
SYMATTR Value 22p
SYMBOL res 0 1072 R0
WINDOW 0 40 45 Left 2
WINDOW 3 38 70 Left 2
SYMATTR InstName R4
SYMATTR Value 2K155
SYMBOL res 224 368 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R1
SYMATTR Value 18K
SYMBOL cap 320 368 R90
WINDOW 0 7 61 VBottom 2
WINDOW 3 -17 -6 VTop 2
WINDOW 123 38 34 VTop 2
SYMATTR InstName C1
SYMATTR Value 3n3
SYMATTR Value2 IC=420
SYMBOL Digital\\or 2512 576 R0
SYMATTR InstName A3
SYMATTR SpiceLine Vhigh=15V Vlow=0V
SYMBOL Digital\\or 2512 688 R0
SYMATTR InstName A4
SYMATTR SpiceLine Vhigh=15V Vlow=0V
SYMBOL res 2288 128 R0
WINDOW 0 42 44 Left 2
WINDOW 3 38 66 Left 2
SYMATTR InstName RLB
SYMATTR Value 16R8
SYMBOL res 928 560 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R11
SYMATTR Value 22K
SYMBOL res 784 768 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R9
SYMATTR Value 1K6
SYMBOL res 784 560 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R8
SYMATTR Value 1K6
SYMBOL res 816 1184 R180
WINDOW 0 47 66 Left 2
WINDOW 3 48 45 Left 2
SYMATTR InstName R10
SYMATTR Value 22K
SYMBOL Digital\\or 1760 912 M180
SYMATTR InstName A5
SYMATTR SpiceLine Vhigh=15V Vlow=0V
SYMBOL ind2 2496 48 R180
WINDOW 0 -64 74 Left 2
WINDOW 3 -75 50 Left 2
SYMATTR InstName LSC
SYMATTR Value 355
SYMATTR Type ind
SYMATTR SpiceLine Rser=10m
SYMBOL diode 2560 -144 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName DRI
SYMATTR Value DID
SYMBOL diode 2624 -96 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName DRJ
SYMATTR Value DID
SYMBOL diode 2624 48 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName DRK
SYMATTR Value DID
SYMBOL diode 2560 160 R270
WINDOW 0 32 32 VTop 2
WINDOW 3 0 32 VBottom 2
SYMATTR InstName DRL
SYMATTR Value DID
SYMBOL cap 2720 -48 R0
WINDOW 0 40 22 Left 2
WINDOW 3 43 46 Left 2
WINDOW 123 44 72 Left 2
SYMATTR InstName CFC1
SYMATTR Value 1000
SYMATTR Value2 IC=12.6
SYMBOL res 2720 128 R0
WINDOW 0 39 45 Left 2
WINDOW 3 40 71 Left 2
SYMATTR InstName RESRC
SYMATTR Value 10m
SYMBOL res 2992 128 R0
WINDOW 0 40 46 Left 2
WINDOW 3 40 72 Left 2
SYMATTR InstName RLC
SYMATTR Value 16R8
SYMBOL Opamps\\LT1677 208 848 R0
WINDOW 0 19 2 Left 2
WINDOW 3 22 28 Left 2
SYMATTR InstName VEA
SYMBOL Opamps\\LT1677 864 704 R0
WINDOW 0 18 4 Left 2
WINDOW 3 20 28 Left 2
SYMATTR InstName CDA
SYMBOL Opamps\\LT1677 1200 832 R0
WINDOW 0 16 4 Left 2
WINDOW 3 16 29 Left 2
SYMATTR InstName CEA
SYMBOL voltage 528 1072 R0
WINDOW 0 46 47 Left 2
WINDOW 3 49 74 Left 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR InstName VCC
SYMATTR Value 3.5V
SYMBOL res 272 1040 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R6
SYMATTR Value 22K
SYMBOL res 160 1184 R180
WINDOW 0 -68 70 Left 2
WINDOW 3 -80 44 Left 2
SYMATTR InstName R7
SYMATTR Value 22K
SYMBOL res 1088 896 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R13
SYMATTR Value 22K
SYMBOL res 1152 1184 R180
WINDOW 0 -59 71 Left 2
WINDOW 3 -59 45 Left 2
SYMATTR InstName R14
SYMATTR Value 22K
SYMBOL res 224 464 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R3
SYMATTR Value 180K
SYMBOL res 336 464 R90
WINDOW 0 0 56 VBottom 2
WINDOW 3 32 56 VTop 2
SYMATTR InstName R2
SYMATTR Value 180K
SYMBOL current 1632 144 R0
WINDOW 3 24 80 Invisible 2
WINDOW 123 0 0 Left 2
WINDOW 39 0 0 Left 2
SYMATTR Value PULSE(50mA 50mA 0 100n 100n 1m 2m)
SYMATTR InstName I1
SYMBOL cap 1344 560 R90
WINDOW 0 0 32 VBottom 2
WINDOW 3 32 32 VTop 2
SYMATTR InstName C4
SYMATTR Value 390p
SYMBOL ind 2048 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName LFB
SYMATTR Value 100
SYMATTR SpiceLine Rser=10m
SYMBOL ind 2752 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName LFC
SYMATTR Value 100
SYMATTR SpiceLine Rser=10m
SYMBOL cap 2160 -32 R0
WINDOW 0 43 8 Left 2
WINDOW 3 45 30 Left 2
WINDOW 123 45 55 Left 2
SYMATTR InstName CFB2
SYMATTR Value 330n
SYMATTR Value2 IC=12.6
SYMBOL cap 2864 -32 R0
WINDOW 0 43 8 Left 2
WINDOW 3 45 30 Left 2
WINDOW 123 45 55 Left 2
SYMATTR InstName CFC2
SYMATTR Value 330n
SYMATTR Value2 IC=12.6
SYMBOL ind 1248 -144 R270
WINDOW 0 32 56 VTop 2
WINDOW 3 5 56 VBottom 2
SYMATTR InstName LFA
SYMATTR Value 100
SYMATTR SpiceLine Rser=10m
SYMBOL cap 1360 -32 R0
WINDOW 0 41 6 Left 2
WINDOW 3 43 32 Left 2
WINDOW 123 44 58 Left 2
SYMATTR InstName CFA2
SYMATTR Value 330n
SYMATTR Value2 IC=420
SYMBOL cap 1488 -32 R0
WINDOW 0 41 6 Left 2
WINDOW 3 43 32 Left 2
WINDOW 123 44 58 Left 2
SYMATTR InstName CFA3
SYMATTR Value 1
SYMATTR Value2 IC=420
SYMBOL res 1488 128 R0
WINDOW 0 39 45 Left 2
WINDOW 3 40 71 Left 2
SYMATTR InstName RDA2
SYMATTR Value 18R
TEXT 1536 336 Left 2 !K1 LPA LPB LSA LSB LSC 1
TEXT 1528 408 Left 2 !.MODEL DID D(Ron=10m Roff=1E7)
TEXT 1528 360 Left 2 !.MODEL MSW SW(Ron=10m Roff=1E7 Vt=7V5)
TEXT 1528 456 Left 2 !.LIB OPAMP.SUB
TEXT 1528 480 Left 2 !.tran 0 10m 5m uic
TEXT 1528 432 Left 2 !.MODEL ZID D(Ron=10m Roff=1E9 VRev=5V)
TEXT 1528 384 Left 2 !.MODEL CMP SW(Ron=10m Roff=1E7 Vt=0V)
LINE Normal 928 32 928 -48 2
LINE Normal 944 32 944 -48 2
LINE Normal 608 48 608 -48 2
LINE Normal 624 48 624 -48 2
LINE Normal 1728 32 1728 -48 2
LINE Normal 1744 32 1744 -48 2
LINE Normal 2432 32 2432 -48 2
LINE Normal 2448 32 2448 -48 2
Attached Images
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File Type: png Screenshot at 2017-12-12 15:50:10.png (81.7 KB, 33 views)
File Type: png Screenshot at 2017-12-12 16:01:42.png (82.1 KB, 33 views)
File Type: png Screenshot at 2017-12-12 16:14:53.png (74.5 KB, 28 views)
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Old 12th December 2017, 05:04 PM   #17
MorbidFractal is online now MorbidFractal
diyAudio Member
 
Join Date: Nov 2017
Oh.. looking at things again I think it is demonstrating a problem that I have postulated before. Flux imbalance. More fun stuff to sort out. There are solutions.
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