Hi Marko! Thanks for your vids. I bought your bundle last week and look forward to winding soon! One thing though about your rec of splitting large wires into two parallel bifilars; if your calculate the cross-sectional areas of the large and smaller wires, you’ll find half-thickness wire is actually far lower than half the area of the larger wire. Two runs of 2/3 the larger wire is closer.

@Delatsch

5 ай бұрын

Hi Eric, thank you for your kind words. Hm, I never thought about that, but yeah, what you are saying seems to make perfect sense!

Thank you for the video and I'm looking forward to the new calculator.

@Delatsch

8 ай бұрын

Thank you!

Hi, interesting output calculator. How would you use it on a Darlington single BJT class-A with a coupled transformer output into 16ohm speaker? Output power 2watt. Power supply 20v dc.

Hello Marko, I am having a hard time understanding "Selected practical core cross section (cm2)" in the Advanced PP Output Calculator. Thanks.

@Delatsch

3 ай бұрын

Hi, that is the core that you selected, the one which you have. So, the calculated is just what the optimum should be more or less, but you need to specify what you will use exactly. It is the width of the center leg of the core times the height of the stack. Or if you have the bobbin, it would be the bobbin hole length times its width.

Hi Marko! Edcor sells laminations that they say have a Gauss rating of 20,300. Would you put this really high number into your output tranny calculator or would you lower the number a little?

@Delatsch

4 ай бұрын

Hm, sounds a bit optimistic, but you can test it. Wind a simple 120V or 230V primary to 10 or 12V secondary and check if you will get the calculated voltage. Keeping the gauss level slightly lower will make the transformer run a lot cooler as well.

How can I get one of your spread sheets? Is it in excel

@Delatsch

12 күн бұрын

You can get them on my website, check the links in the description, there is a new online version that works natively in browser and on this link there is a free calculator for power transformers: transformercalculator.com

Hi Delatsch, thank You for the tutorial, for me especially informative is the second part - OT calculation. I bought your calculator, and trying to get to proper results - could you help me a little bit? It is a tube EL84, the amp is for audio purposes. I have EI84 cores, 2,8x42 standard bobbin. So the core cross section is 11,76, plate load is 5,2k, speaker impedance 8Ohm, Power (overrated) let's say 10W and min. frequency 50Hz. For such parameters i have primary/secondary turns like 5188/203, and stack fill of 85% (too high). In this material you said that in your experience primary should have 2000-3000 turns to have good sonic results. I can have such result by setting minimm frequency at 150Hz. Is that a proper way to calculate? Could such transformer reach - lets say -50Hz low?

@Delatsch

8 ай бұрын

Hi Jacek, something is not correct there. Please contact me on my web page or facebook.

Very god

@Delatsch

4 ай бұрын

Thank you!

The website not working ?

@Delatsch

9 ай бұрын

It should be working fine, I mistyped the address and changed it now.

@robertpichora5881

8 ай бұрын

Marko, Excellent video. Great to have you back. When do you expect your “new calculator” to be available?

@Delatsch

8 ай бұрын

Thanks Robert and thank you for your support. It will be available in a few days, but I will send it you tomorrow.@@robertpichora5881