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Simulating Bevois Valley Morgan Jones
Simulating Bevois Valley Morgan Jones
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Old 18th October 2017, 09:51 AM   #1
bartard is offline bartard  Netherlands
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Join Date: Oct 2017
Location: Netherlands
Post Simulating Bevois Valley Morgan Jones in LTspice

Hi everyone,

I'm new to diyaudio.com so please let me know if I started this thread in the wrong place.

For a long time I've been wanting to build my own stereo amp and have been educating myself on how tube amps work and how they are designed. I still have a lot to learn.

I have installed LTspice and have modelled the schematic of Morgan Jones's "Bevois Valley". This because it might give me more insight in how electricity behaves and flows through an amplifier.

I can't seem to get it working. I get the error: "Time step too small".

I simplified the voltage regulator because I want to concentrate on the actual amplifier.

For the transformer (Hammond 1615) I have used the model of Robert McLean, using his spreadsheet.

Does anyone know what I am doing wrong?

Please let me know if I don't provide enough information or anything. I'm here to learn.

I will include my LTspice schematic with the necessary .inc files.

Thanks a lot, I will really appreciate any help!

Bart
Attached Files
File Type: asc B_und_B_15_amp.asc (9.8 KB, 7 views)
File Type: txt 6BQ5.inc.txt (1.3 KB, 3 views)
File Type: txt ECC88.inc.txt (884 Bytes, 3 views)
File Type: txt Transformers.lib.txt (510 Bytes, 5 views)

Last edited by bartard; 18th October 2017 at 10:32 AM.
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Old 18th October 2017, 11:17 AM   #2
bartard is offline bartard  Netherlands
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Join Date: Oct 2017
Location: Netherlands
Default Some screenshots

I think some screenshots of the schematic in LTspice and on paper will be useful.
Attached Images
File Type: png Schermafbeelding 2017-10-18 om 13.14.18.png (355.1 KB, 73 views)
File Type: png Schermafbeelding 2017-10-18 om 08.18.55.png (257.3 KB, 72 views)
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Old 3rd November 2017, 10:20 PM   #3
Ludus Tonalis is offline Ludus Tonalis  Europe
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Join Date: Dec 2009
Location: Southampton and Aegina
I can't imagine what has happened here. LTspice won't open your .asc file. Asc files, even encrypted ones, are ASCII (i.e. plain text) files, and when I had a look at your file in a text editor I found that it is anything but plain text.
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