SPICE Transformer Model Spreadsheet

[euro21]

Include files?

 

[Adriel]

Include files?

Shows the attachment just fine, will try again.

 

[euro21]

Without these the simulation not working.

You use these include files (from some source), but others (than me) use these tubes models from reliable collections.

 

[jcalvarez]

I gave those to Adriel, they are Ayumi models from an archive posted here a while ago.

 

[Adriel]

I gave those to Adriel, they are Ayumi models from an archive posted here a while ago.

That is trippy! I was writing a reply at 12:57, then the meeting started and didn't post. It was informing him of what you just said.

 

[euro21]

Well I am somewhat satisfied, it ran, however, with the ECC81, distortion went to 18 percent, plus the diode is getting 293V (not the 20V specified), something has corrupted in the file transfer. Glad have it, learned how to adapt a model for the architecture of my file setup and input a .model script (totally intuitive, no instructions needed).

This sample, which I put to #46 post (to demonstrate OTP coils coupling), is the well known RH84 schematic.
http://rh-amps.blogspot.com/2013/02/rh84-amplifier-revision-2_26.html

The tube models made by Stephie (Steve) Bench:
https://forum.intactaudio.com/viewtopic.php?f=15&t=523

The U1 distortion is 9.77% at this input volume.
The U2 grid2 voltage is : 315V-22V (zener) = 293V.
The output power and distortion is as in #46 schematic.



What's the problem?
The topic is about Spice transformer model. In this sample the model is working perfectly.
If this schematic isn't adequate, must be planned another, with this (or similar) output transformer model.

 

[Adriel]

This sample, which I put to #46 post (to demonstrate OTP coils coupling), is the well known RH84 schematic.
http://rh-amps.blogspot.com/2013/02/rh84-amplifier-revision-2_26.html

Which so similar to the Morse I thought a version of it: https://www.diyaudio.com/community/threads/no-bang-no-flash-just-music.14694/.

The U1 distortion is 9.77% at this input volume.

That is not what the schematic says.

What's the problem?

"There are no problems, only solutions." - John Lennon

A miscommunication. Please see above.

The topic is about Spice transformer model.

Yes, however, desired to get the model working so could have a poke around the model to understand what coupled means. Now back to your regular scheduled programing.

So how does one use the block diagram with the script generated by @Robert McLean? As I said before, getting an error code and unable to put the script in the .asy model, button is disabled.

 

[euro21]

"Which so similar to the Morse I thought a version of it: https://www.diyaudio.com/community/threads/no-bang-no-flash-just-music.14694/."
No.
Morse version is simple two stage SE.
RH84 has Schade feedback, which -among others- reduces distortion, so first stage distortion not significantly influences output THD (which is marked on sample schematic in #46).

 

[Adriel]

Please excuse me for misunderstanding your request for changing the topic.

RH84 has Schade feedback, which -among others- reduces distortion, so first stage distortion not significantly influences output THD (which is marked on sample schematic in #46).

First, can you please point out this Schade feedback on the schematic?

Second, the THD on the schematic, as you said, is not accurate, we both found 10 percent. Meaning, seems the schematic needs to be looked over and find the inefficiency(ies), as can get below 0,1THD with other schematics, though 1THD probably be satisfactory.