Your videos are enlightening and have given me courage to repair my output transformer for my Fisher 800C. This transformer is VERY difficult to find. Thank you, thank you, thank you!!!!

Very Very Good explanations Thaks👍

Great video.Very Informative.Thank you

@Delatsch

3 ай бұрын

Thank you!

Excellent explanations, especially your 'rule of thumb' flux density value choices. Thanks for the video and the PDF.

@Delatsch

2 жыл бұрын

Thank you, Craig!

Thank you! Very helpful!

@Delatsch

5 ай бұрын

Thank you!

Does the winding pattern have an effect on the sound? For example, winding guitar pickups with more random “scatter” would can add more capacitance, thus different than machine wound. Also, what considerations are involved in the wire gauge selection? Thank you, I’ve already learned a lot from your videos

Very informative!

What would the winding specs be for a miniature bobbin laminated transformer window cross section is 9mm & 12mm high. Pin terminals 3+2. Its for my powder coat gun. pcb mounted Chicago electric powder coat gun Chinese just can't seem to find a replacement has it doesn't say nothing onit the circuit board that it mounts to says 120v 60hz & it has 5 diodes 2 resisters & a RU 12v relay & underneath the transformer on the board it says T1 its probably a old type has it also says the date 2013.09.05 i would rather like to replace it really but don't no what to actually look for. But my second opinion is to rewind it with the right winding specs ? Also theres a 25v capacitor 470uf split bobbin

Hey Man thank you for your videos! They are a gem. I want to wind a transformer with 230V primary and three secondaries: 345-0-345V, 5V and 6.3V. What is the best order to wind them? Thank you and keep doing these awesome videos. Subscribed!! Marco

@Delatsch

Жыл бұрын

Thank you for your kind words! Wind the primary first, then put kapton or other proper insulation, then wind 345-0-345V, then 6.3V and finally 5V. Any order will work, but this is the most practical one in my opinion.

@marcomeloni9626

Жыл бұрын

Thank you so much for your answer man! Im gonna download your transformer calculator app and start rewinding a trasformer from an old radio. Its not as scary as it seems.

How measure any transformer's magnetic flux value? or with a Gaussmeter?(Tesla meter) If yes how measure : For example while transformer working gauss meter's prope touch to center point of top of transformer steel? If have only core(have not any bobins ) can measure with same process to this CRGO steel's tesla (or gauss )value ? (Please describe with simple sentences becasue English is not my language.) Thanks

@Delatsch

2 ай бұрын

For transformers we don't measure it that way. There might be a way but I am not familiar with it. Usually the maximum flux density of the core laminations is given by the manufacturer. For cheaper ones it is 1T or 10,000 Gauss, for the better ones it is higher. But even with the higher quality you can calculate the transformer for 10,000 Gs to have less losses. If you have the core at home already and you are not sure what quality it is, just calculate it with 10,000Gs and it will work as it should.

The windings bulge out, especially from small transformers (e.g. 12-0-12; 9-0-9 constructions) thus leaving no space for the secondary windings to run through the window area. A brute force like hammering may damage the coil inherently and without doing so if inserted through the window area, the steel laminations may cut the wires in the periphery. Any solution(s) to it? Thanks for the question/answer video. It's very helpful.

@martinda7446

8 ай бұрын

😸

@Delatsch

8 ай бұрын

Sorry for the late answer. You can use two thin wood blocks and slowly and gently compress the windings with a vice. The important parts is to compress it from the sides so that the laminations can go in easily. Also, when winding, try to find optimum tension, try to keep the wire as tight as you can so that it will take as little space as needed.

Hey @Delatsch i have a question if you can answer it. I got an old power transformer that was dipped in what i think its tar or something like that. I took all the laminations apart but the black stuff sipped between each layer of the laminations. Can i sand the laminations or will that affect their function? Thank you Marco.

@Delatsch

Жыл бұрын

Just reuse the core as is, if you sand it you should put a light varnish on it to isolate the laminatios from one another.

How can you determine whether a transformer has an air gap and is suitable for single ended output?

@Delatsch

2 жыл бұрын

If the transformer is not enclosed you can check how the laminations are assembled. Gapped transformers have all "E" shaped laminations inserted from one side and the all "I" shaped ones from the other side, and the gap between them should be visible. If they are potted and enclosed, you would have to measure primary inductance at different dc currents as I've shown in my choke measuring video. If the transformer is not gapped the inductance will drop all the way down even at only couple of mA of dc current.

@bernhardnizynski4403

2 жыл бұрын

@@Delatsch - thank you for that!

Sir i have question. Where to get all materials need for transformers make. Wires are not hard to get. But what kind of bobbins are best for good output transformers and where do i get these and the same questions for cores.

@Delatsch

2 жыл бұрын

The materials are a challenge since there is no online store I'm aware of that sells worldwide and at affordable prices. Usually there is minimum order quantity even if you can find it. I get the parts locally and usually in larger quantities here in the EU.

@piotrgabriel7282

Жыл бұрын

@@Delatsch And what do You think about idea of 3d printed bobbins?

@martinda7446

8 ай бұрын

@@piotrgabriel7282 Perfect. (Seeing Delatsch didn't answer) You can make anything you like, use a material which will not melt so easily. PEEK is ideal.

Can you build me a transformer for my how much would you charge me

Found via Shango. 🤠Absolutely wonderful. I have been thinking about setting up something to wind my own for a long time... This is inspirational stuff. Thank you. PS. Most all of the specialised electrical steel makers for audio transformers have long gone. Is there a favourite modern steel that comes with all the right specs for audio? If I wanted to reproduce a Partridge with same dimensions etc? Obviously I haven't gone through all your videos yet...

@Delatsch

8 ай бұрын

Thanks! The core didn't change that much, there is nothing special about old ones. It is mainly the way they were wound. The core makes bigger difference from very small input and mic transformers which have to work with very low signals. For the output transformers it really doesn't make all that difference. I've made experiments where I wound the same bobbin and one channel is using cheap laminations and the other the expensive "audio grade" ones and the measured and listening results were closer to each other than I expected.