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Valve Headphone Amp

Last post by simon « Tue Sep 12, 2023 1:38 pm
Replies: 35
by simon » Sat Apr 15, 2023 11:38 am
1

2

3
35 Replies

6583 Views

Last post by simon
Tue Sep 12, 2023 1:38 pm
Soft start query

Last post by Paul Barker « Thu Aug 31, 2023 8:29 am
Replies: 5
by iansr » Sun Jan 08, 2023 4:24 pm

5 Replies

2555 Views

Last post by Paul Barker
Thu Aug 31, 2023 8:29 am
Crowhurst 1951 on feedback Alex used, some termed Schade, whoever he was.

Last post by rowuk « Fri Jun 16, 2023 8:22 pm
Replies: 1
by Paul Barker » Sun Jun 11, 2023 11:05 am

1 Replies

2254 Views

Last post by rowuk
Fri Jun 16, 2023 8:22 pm
Crowhurst 1951 on the feedback Quad used

Last post by Paul Barker « Sun Jun 11, 2023 11:12 am

by Paul Barker » Sun Jun 11, 2023 11:12 am

0 Replies

1343 Views

Last post by Paul Barker
Sun Jun 11, 2023 11:12 am
NFB capacitor

Last post by IslandPink « Thu Jun 08, 2023 9:18 pm
Replies: 26
by karatestu » Thu Feb 02, 2023 6:44 pm
1

2
26 Replies

4505 Views

Last post by IslandPink
Thu Jun 08, 2023 9:18 pm
power supply - senior moment

Last post by ed « Wed Apr 19, 2023 4:57 pm
Replies: 2
by ed » Wed Apr 19, 2023 4:12 pm

2 Replies

797 Views

Last post by ed
Wed Apr 19, 2023 4:57 pm
Good idea?

Last post by Mike H « Thu Feb 09, 2023 1:40 pm
Replies: 13
by Daniel Quinn » Tue Feb 07, 2023 8:23 pm

13 Replies

7833 Views

Last post by Mike H
Thu Feb 09, 2023 1:40 pm
Split rail from two positive regulators

Last post by Daniel Quinn « Mon Jan 16, 2023 8:44 pm
Replies: 17
by karatestu » Sun Jan 15, 2023 7:21 pm
1

2
17 Replies

5685 Views

Last post by Daniel Quinn
Mon Jan 16, 2023 8:44 pm
PCF8574 to ULN2803 - have I done something daft?

Last post by Nick « Sat Jan 07, 2023 11:58 am
Replies: 20
by Thermionic Idler » Mon Jan 02, 2023 3:51 pm
1

2
20 Replies

5738 Views

Last post by Nick
Sat Jan 07, 2023 11:58 am
DipTrace

Last post by Paul Barker « Sat Dec 24, 2022 7:49 am
Replies: 39
by simon » Tue Nov 08, 2022 4:56 pm
1

2

3
39 Replies

9709 Views

Last post by Paul Barker
Sat Dec 24, 2022 7:49 am
PS advice

Last post by steve s « Sat Nov 12, 2022 7:55 pm
Replies: 11
by iansr » Sat Nov 12, 2022 9:14 am

11 Replies

3217 Views

Last post by steve s
Sat Nov 12, 2022 7:55 pm
Kicad advice

Last post by Max N « Sun Oct 30, 2022 10:11 pm
Replies: 10
by Max N » Sat Mar 05, 2022 6:28 pm

10 Replies

4514 Views

Last post by Max N
Sun Oct 30, 2022 10:11 pm
Head Scratching?

Last post by pre65 « Sun Sep 25, 2022 10:15 am
Replies: 6
by Ray P » Mon Sep 19, 2022 3:59 pm

6 Replies

4368 Views

Last post by pre65
Sun Sep 25, 2022 10:15 am
Statistical Regulator Without CCS?

Last post by Paul Barker « Thu Aug 11, 2022 12:26 pm
Replies: 5
by BenjaminSmithSeattle » Thu Aug 11, 2022 4:04 am

5 Replies

3403 Views

Last post by Paul Barker
Thu Aug 11, 2022 12:26 pm
c7 socket

Last post by Nick « Wed Jul 20, 2022 5:44 pm
Replies: 1
by ed » Wed Jul 20, 2022 5:34 pm

1 Replies

2294 Views

Last post by Nick
Wed Jul 20, 2022 5:44 pm
Transformer centre tap.

Last post by pre65 « Wed Jun 22, 2022 1:43 pm
Replies: 14
by pre65 » Mon Jun 13, 2022 10:55 am

14 Replies

4554 Views

Last post by pre65
Wed Jun 22, 2022 1:43 pm
PIO Capacitor Calamity

Last post by Thermionic Idler « Wed Jun 08, 2022 7:36 am
Replies: 7
by Thermionic Idler » Fri Jun 03, 2022 7:31 pm

7 Replies

3643 Views

Last post by Thermionic Idler
Wed Jun 08, 2022 7:36 am
Raspberry Pi in same case as DAC

Last post by Thermionic Idler « Fri May 20, 2022 9:30 am
Replies: 2
by Thermionic Idler » Sun May 15, 2022 10:15 am

2 Replies

2921 Views

Last post by Thermionic Idler
Fri May 20, 2022 9:30 am
Parallel Preamp Outputs

Last post by Ray P « Sun Apr 24, 2022 7:23 pm
Replies: 2
by Ray P » Sun Apr 24, 2022 3:06 pm

2 Replies

2672 Views

Last post by Ray P
Sun Apr 24, 2022 7:23 pm
Just need to check

Last post by Ray P « Mon Mar 14, 2022 12:13 pm
Replies: 2
by Ray P » Mon Mar 14, 2022 7:42 am

2 Replies

3242 Views

Last post by Ray P
Mon Mar 14, 2022 12:13 pm
PP output transformer

Last post by andrew Ivimey « Sun Mar 13, 2022 1:17 pm
Replies: 9
by andrew Ivimey » Sat Mar 12, 2022 11:53 am

9 Replies

3484 Views

Last post by andrew Ivimey
Sun Mar 13, 2022 1:17 pm
Dedicated mains for audio

Last post by Nick « Sun Mar 06, 2022 12:02 pm
Replies: 12
by chris » Fri Mar 04, 2022 10:12 am

12 Replies

4577 Views

Last post by Nick
Sun Mar 06, 2022 12:02 pm
RCD question

Last post by Paul Barker « Tue Feb 22, 2022 8:16 am
Replies: 17
by Thermionic Idler » Sat Feb 19, 2022 3:18 pm
1

2
17 Replies

6571 Views

Last post by Paul Barker
Tue Feb 22, 2022 8:16 am
Valve Amp Power Supplies

Last post by Nick « Tue Jan 25, 2022 4:14 pm
Replies: 42
by Cressy Snr » Sun Jan 23, 2022 5:24 pm
1

2

3
42 Replies

12373 Views

Last post by Nick
Tue Jan 25, 2022 4:14 pm
Two-chassis phono stage - grounding question

Last post by Thermionic Idler « Fri Jan 21, 2022 11:01 am
Replies: 12
by Thermionic Idler » Wed Jan 12, 2022 6:27 pm

12 Replies

5302 Views

Last post by Thermionic Idler
Fri Jan 21, 2022 11:01 am
Toroidal transformer interference

Last post by Nick « Fri Dec 31, 2021 6:49 pm
Replies: 1
by Thermionic Idler » Fri Dec 31, 2021 5:34 pm

1 Replies

2837 Views

Last post by Nick
Fri Dec 31, 2021 6:49 pm
Budget DSP Options

Last post by rowuk « Thu Dec 16, 2021 7:03 pm
Replies: 11
by Ray P » Sun Dec 12, 2021 10:36 am

11 Replies

5672 Views

Last post by rowuk
Thu Dec 16, 2021 7:03 pm
Voltage regulation

Last post by Nick « Sun Dec 12, 2021 9:40 am
Replies: 16
by Daniel Quinn » Sat Dec 11, 2021 11:24 am
1

2
16 Replies

6238 Views

Last post by Nick
Sun Dec 12, 2021 9:40 am
Voltage question

Last post by pre65 « Fri Dec 10, 2021 7:07 pm
Replies: 17
by Daniel Quinn » Fri Dec 10, 2021 2:11 pm
1

2
17 Replies

6317 Views

Last post by pre65
Fri Dec 10, 2021 7:07 pm
TKD pots

Last post by Paul Barker « Sun Dec 05, 2021 7:36 am
Replies: 16
by Thermionic Idler » Fri Dec 03, 2021 6:16 pm
1

2
16 Replies

7125 Views

Last post by Paul Barker
Sun Dec 05, 2021 7:36 am
what pcb design software

Last post by malarkey1976 « Tue Sep 21, 2021 4:47 pm
Replies: 9
by ed » Thu Sep 24, 2020 1:03 pm

9 Replies

8718 Views

Last post by malarkey1976
Tue Sep 21, 2021 4:47 pm
PSUD improvements

Last post by IslandPink « Thu Aug 26, 2021 6:18 pm

by IslandPink » Thu Aug 26, 2021 6:18 pm

0 Replies

3322 Views

Last post by IslandPink
Thu Aug 26, 2021 6:18 pm
How can I tell if valves need replacing

Last post by steve s « Sun Aug 15, 2021 11:16 pm
Replies: 8
by bostod » Sun Jan 10, 2021 1:43 pm

8 Replies

6319 Views

Last post by steve s
Sun Aug 15, 2021 11:16 pm
What is SPICE

Last post by Max N « Thu Jun 24, 2021 7:22 pm
Replies: 213
by pre65 » Mon Dec 03, 2007 1:22 pm
1

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11

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14

15
213 Replies

127119 Views

Last post by Max N
Thu Jun 24, 2021 7:22 pm
CCS adjustment question

Last post by Thermionic Idler « Mon Jun 21, 2021 5:45 pm
Replies: 2
by Thermionic Idler » Mon Jun 21, 2021 1:34 pm

2 Replies

3442 Views

Last post by Thermionic Idler
Mon Jun 21, 2021 5:45 pm
Restacking An Output Transformer.

Last post by Cressy Snr « Sat May 22, 2021 12:25 pm
Replies: 60
by Cressy Snr » Tue May 11, 2021 8:40 pm
1

2

3

4

5
60 Replies

27173 Views

Last post by Cressy Snr
Sat May 22, 2021 12:25 pm
Zout Maths - is it me?

Last post by Ray P « Thu Apr 15, 2021 7:20 pm
Replies: 3
by Ray P » Thu Apr 15, 2021 7:52 am

3 Replies

4591 Views

Last post by Ray P
Thu Apr 15, 2021 7:20 pm
Simple Active Low Pass Filter/Buffer

Last post by Ray P « Fri Mar 05, 2021 9:23 pm
Replies: 6
by Ray P » Thu Mar 04, 2021 10:00 pm

6 Replies

5714 Views

Last post by Ray P
Fri Mar 05, 2021 9:23 pm
Grid stopper resistors

Last post by Nick « Mon Mar 01, 2021 4:58 pm
Replies: 8
by Thermionic Idler » Sun Feb 28, 2021 6:54 pm

8 Replies

5464 Views

Last post by Nick
Mon Mar 01, 2021 4:58 pm
More buffers

Last post by Nick « Sat Feb 06, 2021 2:46 pm
Replies: 5
by Max N » Fri Feb 05, 2021 6:48 pm

5 Replies

4755 Views

Last post by Nick
Sat Feb 06, 2021 2:46 pm
Stereo to mono

Last post by Cressy Snr « Wed Feb 03, 2021 4:55 pm
Replies: 18
by karatestu » Tue Sep 08, 2020 10:04 am
1

2
18 Replies

12210 Views

Last post by Cressy Snr
Wed Feb 03, 2021 4:55 pm
Input transformer query

Last post by izzy wizzy « Tue Jan 19, 2021 8:10 am
Replies: 22
by Thermionic Idler » Sat Jan 16, 2021 7:41 pm
1

2
22 Replies

12447 Views

Last post by izzy wizzy
Tue Jan 19, 2021 8:10 am
Anode to Anode cap coupling?

Last post by ed « Sun Jan 17, 2021 3:30 pm
Replies: 17
by Dave the bass » Mon Jan 11, 2021 6:35 pm
1

2
17 Replies

10468 Views

Last post by ed
Sun Jan 17, 2021 3:30 pm
A new valve amplifier

Last post by Ray P « Fri Jan 08, 2021 9:28 pm
Replies: 3
by ed » Sat Jan 02, 2021 5:12 pm

3 Replies

4152 Views

Last post by Ray P
Fri Jan 08, 2021 9:28 pm
Suggestion for CCS at 140mA

Last post by ed « Tue Nov 24, 2020 6:45 am
Replies: 5
by Max N » Mon Nov 23, 2020 8:56 pm

5 Replies

5799 Views

Last post by ed
Tue Nov 24, 2020 6:45 am
dual purpose power supply

Last post by Mike H « Sun Nov 22, 2020 5:24 pm
Replies: 1
by ed » Sun Nov 22, 2020 11:30 am

1 Replies

3366 Views

Last post by Mike H
Sun Nov 22, 2020 5:24 pm
Measuring transformers

Last post by Max N « Sat Nov 21, 2020 9:07 am
Replies: 28
by Max N » Sat Jul 27, 2019 2:33 pm
1

2
28 Replies

23549 Views

Last post by Max N
Sat Nov 21, 2020 9:07 am
harmonic distortion

Last post by JamesD « Mon Nov 16, 2020 4:40 pm
Replies: 9
by ed » Sun Nov 15, 2020 6:43 pm

9 Replies

6530 Views

Last post by JamesD
Mon Nov 16, 2020 4:40 pm
Tweaking a toroidal transformer

Last post by Max N « Sun Nov 08, 2020 9:39 pm
Replies: 10
by Max N » Sat Nov 07, 2020 1:40 pm

10 Replies

7061 Views

Last post by Max N
Sun Nov 08, 2020 9:39 pm
Buffer.

Last post by rowuk « Sun Sep 27, 2020 9:22 am
Replies: 19
by pre65 » Wed Jul 15, 2020 1:05 pm
1

2
19 Replies

11873 Views

Last post by rowuk
Sun Sep 27, 2020 9:22 am

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