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|31st May 2018, 11:32 PM||#1|
Join Date: Feb 2008
Electronics Calculators Excel Workbook
Electronics Calculators Excel Workbook (elecalc.xls)
Index (with links to calculator worksheets)
Sheet1 SPICE Power Transformers Calculator Worksheet
Sheet2 SPICE Output Transformers Calculator Worksheet
Sheet3 2-Stage Transistor Amplifier Calculator Worksheet
Sheet4 Passive Filters Calculator Worksheet
Sheet5 Active OpAmp Equalizer Calculator Worksheet
Sheet6 Ohm's Law Calculator Worksheet
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Last edited by pweaudiotech; 2nd July 2018 at 06:13 AM.
|19th May 2020, 09:43 PM||#2|
Join Date: Jun 2018
Hi, I used elecalc to come up with the spice model for the edcore xpwr 144 power transformer (240v ac in Australia at 50 hz). I notice you need to input the inductance value of the primary and the default value was 10H. How do you determine this for a transformer. I don't see any value on the Edcor specifications.
I use this in a 5ar4/6sn7/300b valve/tube power amp. modelled B+ voltages are a bit higher than actual about 15%.
The model for the output transformer looks reasonable. I used the gsxe 3500 8 15w model. I didn't use ltspice though, I'm trying to learn microcap and imported the spice model into microcap which seems straightforward enough.
Appreciate any pointers. Thanks for the elecalc, very useful.
Last edited by woodo; 19th May 2020 at 09:55 PM. Reason: correction
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