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Hi all - I'm using an older 2010 Mac and am having problems installing. I'm getting the error in the subject. Any suggestions, other than it's just an incompatibility issue? Thanks! Scott

The simplest Soft Start circuit I have seen is in the Ameritron AL-1200. 73, Dick, W1KSZ ________________________________ Sent: Friday, May 14, 2021 4:42 PM To: [email protected]

Hmm..."something simple, working for years..." I've been doing that for years with a different topology/method that is also something simple: Power Amp: Two switches...switch on the filaments first,

hello Have a look for something simple, working for years... http://f1frv.free.fr/main5e_HV_Bridge.html 73s Dom

I use the? Harbach Electronics "soft start" module.

Hi Robert, The driver for the feature was choke input supplies fed by vacuum tubes - these will warm up over a few seconds rather than "spike" straight away and it's a good way to soften the start.

Hi, What are the real world possibillities here? Variac? Electronic time delay? Other? Best, RC in VT

OK, I understand now. You can amend the PIV on the rectifier to suit this need. The help file gives some guidance on making up your own rectifiers and modifying the existing ones. Help > Contents >

If your VAC is under 654V AC for inductive input, and your input choke is reasonably large (Google "critical choke value"), then the PIV will be under 1850V. (565V AC for the 1600V condition and

it is not a matter of annoyance in seeing the message, but I would like to be sure that the valve does not blow. -- Privacy: Informativa per i destinatari di messaggi di posta elettronica Informativa

It could certainly be changed, the issue is that it doesn't have an ability to have two different PIV in the model. The PIV parameter doesn't actually do anything other than to issue a warning to tell

reading the GZ37 datasheet, the PIV with capacitive input is 1600volt, while with inductive input 1850volt, is it possible to modify the model of the GZ37 to consider this difference?

Works now. FireFox 84.0.2 on Windows 7.

Thanks a lot Duncan. It works as it should. What can I say. Great job with psud2 and tdsl pe. Happy for more than 13 years now. And the last PSUD2 version 2.22 build 76 is nicely improved with

Hi Konstantinos, The code for example PSU files has now been amended, tested, and the website has just been updated. Could you please try again? 73, Duncan M0KGK

Hi Duncan, This is the location I am trying to download from. I cannot access the link. Would it be difficult to put the guitar amp designs in a zip file here? Thanks a lot again 73 de Konstantinos

Just checked the website over and it uses some out of date code which used to work but has now been blocked from operating. It will need some minor rewriting which I will do this evening and post back

Hi Konstantinos, You should be able to download from the following page -> http://duncanamps.com/psud2/psud_list.php Are you getting an error message, or having difficulty accessing the page? 73,

Hello Duncan. I installed the latest version on my new laptop and tried to download some of the examples from the download section of your site in the psud2 area, but I did not managed to do so. Could

*For quiescent conditions, you could simplify by combining the identical branches, (half the inductance and resistance, twice the capacitance, twice the current).? The resistor in the first section