Is there any interest in creating a web based version of PSUD2/3? I'm also a software developer and would love to get involved.
I did look at this, but PSUD is the most math-intensive piece of software I've ever written and it wouldn't take many users to put a heavy load on a web/cloud server. I ...
Search found 43 matches
- Wed Jun 10, 2026 5:14 pm
- Forum: PSU Design
- Topic: Understanding safe start up behaviour.
- Replies: 3
- Views: 6780
Re: Understanding safe start up behaviour.
Do I understand correctly that the higher ripple pre choke is cancelled in a PP output?
This is generally correct, the Push Pull stage tends to reject power supply ripple along with even order harmonics.
However, you can get the supply rails modulating the output (IMD - Inter Modulation ...
This is generally correct, the Push Pull stage tends to reject power supply ripple along with even order harmonics.
However, you can get the supply rails modulating the output (IMD - Inter Modulation ...
- Tue Jun 09, 2026 7:50 pm
- Forum: PSU Design
- Topic: Understanding safe start up behaviour.
- Replies: 3
- Views: 6780
Re: Understanding safe start up behaviour.
Hi, and welcome.
I wouldn't worry too much about the current spike, especially for SS rectifiers. The initial design that PSUD2 opens up with is modelled on the power supply from my 4 x 6L6 / 4 x EL34 guitar amp. It hits peaks of around 9 amps from memory. It's only for a few cycles so doesn't get ...
I wouldn't worry too much about the current spike, especially for SS rectifiers. The initial design that PSUD2 opens up with is modelled on the power supply from my 4 x 6L6 / 4 x EL34 guitar amp. It hits peaks of around 9 amps from memory. It's only for a few cycles so doesn't get ...
Re: PSUD3
Hi Joe,
Some of my projects are closed source and some are open source (you can see those at https://github.com/duncanamps ).
Much depends on the target audience, typically the open source ones are aimed at programmers; people with known technical skill who will be able to understand and use the ...
Some of my projects are closed source and some are open source (you can see those at https://github.com/duncanamps ).
Much depends on the target audience, typically the open source ones are aimed at programmers; people with known technical skill who will be able to understand and use the ...
- Fri May 29, 2026 8:24 pm
- Forum: Amplifier Design
- Topic: Blues Deluxe Reissue gain mods
- Replies: 1
- Views: 5953
Re: Blues Deluxe Reissue gain mods
Hi Ross,
Glad it was some use to you, however I cannot claim any credit for it! The mod was developed by Andy Marshman, he's the guru behind the change
https://www.duncanamps.com/technical/bluesdeluxe.html
Regards,
Duncan
Glad it was some use to you, however I cannot claim any credit for it! The mod was developed by Andy Marshman, he's the guru behind the change
https://www.duncanamps.com/technical/bluesdeluxe.html
Regards,
Duncan
- Fri May 29, 2026 8:21 pm
- Forum: ML7Gear
- Topic: An abnormal lathe.
- Replies: 1
- Views: 5949
Re: An abnormal lathe.
Hi,
The software is not set up to work with the Chinese mini lathe without setting up a new profile. You can do this yourself, but it is quite complicated.
However, if you go to the download page, at the bottom of the page there is a simpler piece of software that works with only 4 gears. This may ...
The software is not set up to work with the Chinese mini lathe without setting up a new profile. You can do this yourself, but it is quite complicated.
However, if you go to the download page, at the bottom of the page there is a simpler piece of software that works with only 4 gears. This may ...
- Sat Dec 27, 2025 3:13 pm
- Forum: News
- Topic: ML7Gear build 46 released
- Replies: 0
- Views: 14478
ML7Gear build 46 released
Hi,
A bug fix released of ML7Gear is available, read the notice here -> https://forum.duncanamps.com/viewtopic.php?t=51
Regards,
Duncan
A bug fix released of ML7Gear is available, read the notice here -> https://forum.duncanamps.com/viewtopic.php?t=51
Regards,
Duncan
- Sat Dec 27, 2025 3:12 pm
- Forum: ML7Gear
- Topic: ML7Gear V1.2 build 46 released
- Replies: 1
- Views: 7467
ML7Gear V1.2 build 46 released
Hi,
A bug found in build 45 has been isolated and fixed. When changing the number of gears on hand with Ctrl+G, the software would not save the file after the changes. This has now been fixed and the application re-packaged.
Please download a fresh copy from: https://metal.duncanamps.com/software ...
A bug found in build 45 has been isolated and fixed. When changing the number of gears on hand with Ctrl+G, the software would not save the file after the changes. This has now been fixed and the application re-packaged.
Please download a fresh copy from: https://metal.duncanamps.com/software ...
- Wed Dec 03, 2025 1:19 pm
- Forum: News
- Topic: Site had been down 2-3 Dec
- Replies: 0
- Views: 9621
Site had been down 2-3 Dec
Hi folks, the site had been down for many hours across 2nd / 3rd December due to an upgrade issue, however this has now been solved. Thank you for your patience.
Regards,
Duncan
Regards,
Duncan
- Wed Nov 12, 2025 6:22 pm
- Forum: SPICE
- Topic: Help modeling triode with heater
- Replies: 2
- Views: 12312
Re: Help modeling triode with heater
Hi,
However, there was no link to the generic triode model...
I withdrew the Generic Triode model as it had some real accuracy issues. Not sure if I would re-visit it, as there are probably a lot better models out there since I put the model together 28 years ago.
However, the documents are ...
However, there was no link to the generic triode model...
I withdrew the Generic Triode model as it had some real accuracy issues. Not sure if I would re-visit it, as there are probably a lot better models out there since I put the model together 28 years ago.
However, the documents are ...

