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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

3429 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

406 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

1626 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
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213 Replies

84682 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

373 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
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60 Replies

5744 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

1076 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

1686 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

1225 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

1322 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

4396 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

3463 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

3124 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

1036 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

2124 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

686 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

13375 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

2154 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

2243 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

4390 Views

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

Last post by ed « Sat Aug 22, 2020 5:07 pm
Replies: 6
by ed » Wed Jul 22, 2020 6:33 pm

6 Replies

2668 Views

Last post by ed
Sat Aug 22, 2020 5:07 pm
Gain - Have I Got this Right?

Last post by steve s « Wed Aug 19, 2020 2:18 pm
Replies: 4
by Ray P » Wed Aug 19, 2020 9:49 am

4 Replies

1053 Views

Last post by steve s
Wed Aug 19, 2020 2:18 pm
GZ34 sanity check

Last post by Nick « Sun Aug 16, 2020 8:31 pm
Replies: 9
by Thermionic Idler » Sun Aug 16, 2020 2:42 pm

9 Replies

2885 Views

Last post by Nick
Sun Aug 16, 2020 8:31 pm
Instrument patch cables.

Last post by pre65 « Thu Jul 30, 2020 4:46 pm
Replies: 7
by pre65 » Tue Jul 28, 2020 9:32 am

7 Replies

2039 Views

Last post by pre65
Thu Jul 30, 2020 4:46 pm
Long interconnects.

Last post by chris661 « Wed Jul 15, 2020 9:48 am
Replies: 11
by pre65 » Thu Jul 02, 2020 3:03 pm

11 Replies

3532 Views

Last post by chris661
Wed Jul 15, 2020 9:48 am
Basics of valve amplifiers

Last post by steve s « Fri Jul 10, 2020 8:07 pm
Replies: 17
by bostod » Thu Jul 02, 2020 7:23 pm
1

2
17 Replies

5189 Views

Last post by steve s
Fri Jul 10, 2020 8:07 pm
dc-dc converters

Last post by Mike H « Fri Jul 10, 2020 4:49 pm
Replies: 11
by ed » Mon Jun 29, 2020 12:03 pm

11 Replies

3579 Views

Last post by Mike H
Fri Jul 10, 2020 4:49 pm
Blackgate Caps

Last post by IslandPink « Tue Jul 07, 2020 7:15 pm
Replies: 22
by Greg » Sun Jul 05, 2020 9:29 pm
1

2
22 Replies

5540 Views

Last post by IslandPink
Tue Jul 07, 2020 7:15 pm
Tapping.

Last post by Mike H « Tue Jul 07, 2020 7:00 pm
Replies: 13
by pre65 » Fri Jul 03, 2020 12:33 pm

13 Replies

3281 Views

Last post by Mike H
Tue Jul 07, 2020 7:00 pm
Transformer VA rating.

Last post by Cressy Snr « Mon Jul 06, 2020 1:37 pm
Replies: 6
by pre65 » Mon Jul 06, 2020 10:33 am

6 Replies

1887 Views

Last post by Cressy Snr
Mon Jul 06, 2020 1:37 pm
CCS in Mellow OTL

Last post by Ray P « Sun Jul 05, 2020 4:20 pm
Replies: 8
by Ray P » Sun Jul 05, 2020 7:32 am

8 Replies

1521 Views

Last post by Ray P
Sun Jul 05, 2020 4:20 pm
Kelvin capacitors 4 lead.

Last post by Nick « Tue Jun 16, 2020 8:49 pm
Replies: 3
by pre65 » Tue Jun 16, 2020 5:20 pm

3 Replies

1602 Views

Last post by Nick
Tue Jun 16, 2020 8:49 pm
dht heater supplies - again

Last post by ed « Sat Jun 13, 2020 9:00 am

by ed » Sat Jun 13, 2020 9:00 am

0 Replies

2357 Views

Last post by ed
Sat Jun 13, 2020 9:00 am
112A bias options.

Last post by Paul Barker « Fri Jun 12, 2020 5:18 pm
Replies: 9
by pre65 » Fri Jun 12, 2020 12:57 pm

9 Replies

2393 Views

Last post by Paul Barker
Fri Jun 12, 2020 5:18 pm
Valve anode voltage.

Last post by Paul Barker « Fri Jun 12, 2020 5:07 pm
Replies: 5
by pre65 » Fri Jun 12, 2020 3:08 pm

5 Replies

1202 Views

Last post by Paul Barker
Fri Jun 12, 2020 5:07 pm
PSU designer understanding.

Last post by pre65 « Thu May 21, 2020 11:42 am
Replies: 70
by pre65 » Tue Apr 28, 2020 12:55 pm
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4

5
70 Replies

15522 Views

Last post by pre65
Thu May 21, 2020 11:42 am
soldering temperature

Last post by Mike H « Fri May 08, 2020 2:31 pm
Replies: 6
by ed » Thu May 07, 2020 3:32 pm

6 Replies

2119 Views

Last post by Mike H
Fri May 08, 2020 2:31 pm
Digital volume control.

Last post by pre65 « Sun May 03, 2020 1:49 pm
Replies: 42
by pre65 » Sat Apr 04, 2020 2:16 pm
1

2

3
42 Replies

11800 Views

Last post by pre65
Sun May 03, 2020 1:49 pm
Custom toroids.

Last post by Paul Barker « Tue Apr 28, 2020 2:14 pm
Replies: 2
by pre65 » Tue Apr 28, 2020 10:18 am

2 Replies

993 Views

Last post by Paul Barker
Tue Apr 28, 2020 2:14 pm
Dual rail +/- 80v power supply.

Last post by Paul Barker « Mon Apr 27, 2020 6:26 pm
Replies: 21
by pre65 » Fri Nov 17, 2017 9:56 am
1

2
21 Replies

12018 Views

Last post by Paul Barker
Mon Apr 27, 2020 6:26 pm
Capacitor charging times.

Last post by IslandPink « Sun Apr 19, 2020 6:05 pm
Replies: 14
by pre65 » Sat Apr 18, 2020 6:01 pm

14 Replies

3002 Views

Last post by IslandPink
Sun Apr 19, 2020 6:05 pm
Google Images.

Last post by Nick « Wed Apr 08, 2020 7:48 pm
Replies: 7
by pre65 » Wed Apr 08, 2020 5:46 pm

7 Replies

2245 Views

Last post by Nick
Wed Apr 08, 2020 7:48 pm
pentode screens

Last post by izzy wizzy « Tue Dec 10, 2019 9:05 pm
Replies: 18
by ed » Fri Dec 06, 2019 7:20 pm
1

2
18 Replies

6919 Views

Last post by izzy wizzy
Tue Dec 10, 2019 9:05 pm
Biasing question - totem-pole OTL

Last post by Mike H « Mon Oct 14, 2019 11:27 pm
Replies: 3
by Thermionic Idler » Sun Oct 13, 2019 7:58 pm

3 Replies

3355 Views

Last post by Mike H
Mon Oct 14, 2019 11:27 pm
Speaker cables (different send & return)

Last post by karatestu « Thu Sep 26, 2019 3:47 pm
Replies: 5
by karatestu » Wed Sep 25, 2019 4:56 pm

5 Replies

4389 Views

Last post by karatestu
Thu Sep 26, 2019 3:47 pm
Help interpreting 2nd/3rd Harmonic values on WE datasheet

Last post by pre65 « Tue Aug 20, 2019 8:10 pm
Replies: 11
by RhythMick » Mon Aug 19, 2019 9:44 pm

11 Replies

5893 Views

Last post by pre65
Tue Aug 20, 2019 8:10 pm
Super capacitors

Last post by IslandPink « Sun Aug 04, 2019 9:43 pm
Replies: 34
by pre65 » Mon Apr 23, 2018 10:40 am
1

2

3
34 Replies

17191 Views

Last post by IslandPink
Sun Aug 04, 2019 9:43 pm
Phono Hum

Last post by IslandPink « Mon Jul 08, 2019 9:38 pm
Replies: 20
by IslandPink » Sun Jun 23, 2019 3:06 pm
1

2
20 Replies

9832 Views

Last post by IslandPink
Mon Jul 08, 2019 9:38 pm
Fully balanced amplification system?

Last post by steve s « Fri Jul 05, 2019 4:14 pm
Replies: 8
by gdog » Thu Jul 04, 2019 7:31 pm

8 Replies

5245 Views

Last post by steve s
Fri Jul 05, 2019 4:14 pm
75R Digital Cable

Last post by Nick « Fri Apr 19, 2019 10:30 am
Replies: 3
by little eddy » Thu Apr 18, 2019 7:17 pm

3 Replies

4075 Views

Last post by Nick
Fri Apr 19, 2019 10:30 am

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