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Electronics Calculators Excel Workbook
Electronics Calculators Excel Workbook
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Old 31st May 2018, 11:32 PM   #1
pweaudiotech is offline pweaudiotech  United States
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Default Electronics Calculators Excel Workbook

(Updated 6/5/2018)
Electronics Calculators Excel Workbook (elecalc.xls)
Worksheets:
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

New Download Links:

Excel Workbook File
elecalc.xls

Zipped Excel .xls File
elecalc.zip

NOTE:
Right Button Mouse Click on the Downloaded File to Access 'Properties' at the Bottom of the Context Menu and Click the 'Unblock' Button if it Appears to Allow Computer Program Compatibility ...

Last edited by pweaudiotech; 2nd July 2018 at 06:13 AM.
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Old 19th May 2020, 09:43 PM   #2
woodo is offline woodo  Australia
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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.
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File Type: jpg power xfmr.JPG (315.9 KB, 73 views)

Last edited by woodo; 19th May 2020 at 09:55 PM. Reason: correction
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Old 19th May 2020, 11:30 PM   #3
woodo is offline woodo  Australia
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I saw in jdrouins thread on a similar amp he added in the second audio channel. This seem to fix the over voltages. Thanks.
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