300B SE Output Transformer Calculation and Winding 

That is beautiful, Marko. This sets my mind on fire thinking about what to build next. The transformers and chokes I have purchased from you already are top-notch quality that I am very pleased with. Keep up the good work and congratulations on your new equipment.

it is great to see the cnc winder in action. Thanks for the video

Graziee Marko, davvero bello e divertente... non vedo l'ora di provarci, a presto!

Beautiful workmanship !

Love this Marko!! I also have this winder, its a great unit!

Oh, nice easygoing gap contorl！

Nice catch!!

Awesome!! I’m so glad to see you’re back on. I found your channel several months ago and LOVE it. If there’s any way you would be open to helping me out with a consultation, I would be more than happy to compensate you for your time. I would love some advice on several project ideas I have been planning. Either way I absolutely love your videos, thank you so much for sharing your knowledge!

👏 great work!

Am knew to this channel but products are amazing

super production.

Моталка отличная, ничего не скажешь. А у меня простая ручная моталка, чисто для радиолюбителей. Но я её, тоже модернизировал. Я убрал ручку, поставил сервопривод с редуктором от военной радиостанции , и мотаю на ней каркасы от 1 кв/см , до 50 кв/см . Только перекидываю, шестерни разных диаметров на редукторе. Спокойно перемотал на ней, трансформаторы на 3 кВт...) 😎

I'm excited to see where you take transformer design, fabrication and test. Thanks for the video. Nice winder, congratulations.

thx! 👍

Hi dear friend Please make a video on how to make and parts of the 300BSA winding machine

Kick ass!

I’d would love to hear them play through real speakers 300’s in stereo note seam to float in the air. Heaven sent. 😊

Interesting video. Hope one day you can try my cascode mods to that JC Morrison design, I think you will be shocked at how much better it performs :)

Can you tell us where to find more infos on the 300b amp circuit?

Very nice video. Do you put insulation on the screws and nuts? thank you very much

Where do you get the forms and eleaminated plates? I can't find them anywhere in the US

En el canal de Fran se explica como utilizar transformadores de Alogenos para sustituir los transformadores de impedancias.

Excelent!!! I will try your SE calculator to winding a old style champ 5f1 SE OP trafo. So is possible to you make a video tuto. about the interleaves and layers to clarify that. Best Regards

Hi, why do you have those little squares of plywood at each end of the bobbin at 2:17 of video ? Thanks.

Are you going to be starting a transformer winding company? Two of the most well known winders in the audio industry have now closed shop, Magnequest and ClassicTone, so there is a need for someone to step up. Mike LaFevre of Magnequest owns the original diagrams and drawings for Peerless and Acrosound, maybe he would license or sell his library. Anyways, I enjoy your videos.

Ooh, nice! Did you use M6 steel or another core material?

How do you adjust the wire tensioner pads correctly? Thanks.

Where do you get your bobbins from

Interesting video, are those EI 114 laminations you are using on the O/P transformer? I like the CNC winding machine you have there. What gauge of wire can it handle min to max if you don’t mind me asking? Thanks

Hi ! I tried to buy the advanced spreadsheet for calculating the trafo but Norton AV didn't allow me to proceed. I left a msg. in Facebook. Any workaround ? Thanks !

Very very cool! Do you wind PP transformers as well? Anything in the higher wattage like 50W to 100W?

Hi Marko, I hope all is well with you and your loved ones. I think about you often being in Ukraine. I am about to start on a couple of projects - one a Theremin for a musician friend and another stereo amplifier using 1619 tubes. The filaments are 2.5V, 2A and I need two separate filament windings as the cathodes are directly heated so I took a 12V, about 100VA outdoor lighting transformer and removed the secondary and wound two secondaries for 2.5V each. I used silver plated, Teflon coated wire - I assume the Teflon will be OK and not melt. Your thoughts on that would be greatly appreciated. It buzzed a bit when I reassembled the core so I did the best I could to tap and tighten it up and then dipped it in shellac and it worked - I hope it doesn't catch on fire... 🙂 it provides proper voltage under load of 4A each winding. Stay safe -

Any technical informatiom about this transformer? Frequency response, copper losses and so on? This looks like a very simple transformer which migth work but not the performance an expensive tube as a 300B needs.

How much does it cost. Please send me details of this machine.

I have 2 or 3 power converter transformers I need rebuild, can you help me? Definitely will pay for it as it’s for a panel that costs A LOT of money LOl

Is the large size necessary for a single 300b?

I would like to try this with a 6BM8. It's cheaper : )

A minha Cnc está com erro Err-P alguém sabe tirar?

Pozdrowienia! Szczelina to do klasy A?

Провод наматывается рывками, может повреждаться от динамических ударов, система натяжения провода неудачная или отсутствует

测个1000HZ方波看下

😂😂😂😂😂

You can't hear the difference between rectifier tubes, in fact, you can't hear the difference between a tube and a silicon rectifier - it's DC, you can't hear DC!

more than an audio transformer, to me it seems to be a power supply and also badly done.