You can download the program, download the archive with libraries that are circled with a red line in the figure and click on the RUN icon. But this is probably an old version of the amplifier file. Ask the author for a new one, because when overloaded, Q6 will emit magical smoke if its current and voltage are not limited.
Attachments
Always have a detailed look at the index in post #1 - see project A which has a link to post #1149 to the latest asc version of 2stageEF_3.4.2.zip
BR, Toni
BR, Toni
Just tried the zip content from post 1149 with the newest LTSpice version 17.1.5 fresh installed in a new Linux-Wine directory (= behaves like a fresh installed windows 7)
My directory content:
-rw-r--r-- 1 toni users 1493 11. Aug 2014 2SC5200_2SA1943.lib
-rw-r--r-- 1 toni users 49903 3. Aug 2014 2stageEF_class_AB_power_amplifier_v3.asc
-rw-r--r-- 1 toni users 2959 11. Aug 2014 2stageEF_class_AB_power_amplifier_v3_soa_drv.plt
-rw-r--r-- 1 toni users 19947 1. Aug 2016 Cordell-Models.txt
-rw-r--r-- 1 toni users 838 11. Jän 2014 KSC3503_KSA1381.lib
-rw-r--r-- 1 toni users 9960 26. Mai 2014 mylibs.lib
You need only the File "Cordell-Models.txt" which can be downloaded here.
printnik: you are right. This is an old version and Q6 would burn on overload. See attached sim result picture of the latest asc
BR, Toni
My directory content:
-rw-r--r-- 1 toni users 1493 11. Aug 2014 2SC5200_2SA1943.lib
-rw-r--r-- 1 toni users 49903 3. Aug 2014 2stageEF_class_AB_power_amplifier_v3.asc
-rw-r--r-- 1 toni users 2959 11. Aug 2014 2stageEF_class_AB_power_amplifier_v3_soa_drv.plt
-rw-r--r-- 1 toni users 19947 1. Aug 2016 Cordell-Models.txt
-rw-r--r-- 1 toni users 838 11. Jän 2014 KSC3503_KSA1381.lib
-rw-r--r-- 1 toni users 9960 26. Mai 2014 mylibs.lib
You need only the File "Cordell-Models.txt" which can be downloaded here.
printnik: you are right. This is an old version and Q6 would burn on overload. See attached sim result picture of the latest asc
BR, Toni
Attachments
Had some time to work on the SA2021 new class H version. Hmm - I got the pcb's in 04/2021 - more as 2 years the project has had to wait for continuation. ( 😵 )
Currently waiting for some SK76 heatsinks which are 37mm high...
Heatspreaders are machined, LTP BJT, VAS BJT, IXYS MOSFETs and TTC5200/TTA1943 are already matched...
Two new 800VA toroids (2x16V, 2x55V) are on stock...
Have fun, Toni
Currently waiting for some SK76 heatsinks which are 37mm high...
Heatspreaders are machined, LTP BJT, VAS BJT, IXYS MOSFETs and TTC5200/TTA1943 are already matched...
Two new 800VA toroids (2x16V, 2x55V) are on stock...
Have fun, Toni
Attachments
Looking really good as it gets better and better.
I would love to see your result perhaps this is one of the best thread in solid state.
I would love to see your result perhaps this is one of the best thread in solid state.
Both channels are working out of the box! 😎
supply: 2 x 20V and 2 x 31V
Quick and dirty setup: bias set to oliver voltage (~42mV across emitter resistors) and done first measurements:
0.003 % THD+N at 1kHz ~ 12V RMS @ 8R, bw 80kHz
0.006 % THD+N at 20kHz ~ 12V RMS @ 8R, bw 80kHz
This is measured at the critical supply crossover region where the "high voltage" supply steps in.
SA2021 NewClassH is working as expected! Again this smile: 😎
BR, Toni
supply: 2 x 20V and 2 x 31V
Quick and dirty setup: bias set to oliver voltage (~42mV across emitter resistors) and done first measurements:
0.003 % THD+N at 1kHz ~ 12V RMS @ 8R, bw 80kHz
0.006 % THD+N at 20kHz ~ 12V RMS @ 8R, bw 80kHz
This is measured at the critical supply crossover region where the "high voltage" supply steps in.
SA2021 NewClassH is working as expected! Again this smile: 😎
BR, Toni
Attachments
