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Dorin V Bodea

Transformator interstage IS1111IS20 dedicat defazor Iron Schmitt

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6 hours ago, Усилитель said:

De la inceput mi-au placut lucrarile dvs , frumos realizate ,bine documentate ,as intreba la acest interstage ce miez folositi si daca e nevoie de tehnici de bobinare ca la cele de iesire , cu straturi alternative primar /secundar , galeti etc ?

 

Multumesc pentru aprecieri! Miezul este, in mare, M6. Sirma Gr.2/Et.2 bobinata cu o tehnica proprietara pe galeti orizontal/vertical, nu-i mare lucru, e mult mai usor sa explici decit sa faci. Secretul final al succesului este sa aproximezi intotdeauna prin lipsa, astfel incit mai tot user-ul sa fie placut surprins de rezultatele in viata reala versus specificatiile tehnice.

Edited by Dorin V Bodea
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Da , asa este , un traf interstage e mai scump ca unul de iesire......

 

https://www.sowter.co.uk/acatalog/E_A_Sowter_Ltd_INTERSTAGE_TRANSFORMERS_21.html

 

Ba chiar au aparut si  "FAKE "......

 

A customer approached me and show me his 211 SE amplifier he bought many years ago. He told me that the 211 SE amp need repair because left channel is not working. A quick check with multimeter, I found that the interstage transformer was open circuit. The left channel interstage transformer had been removed by me , and shocked to see whats inside the it. I found a badly built/ mount plate choke under the cover, with coupling capacitor and grid resistor in it too. I removed the right channel " interstage " as shown in this video.

 

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17 hours ago, Усилитель said:

Da , asa este , un traf interstage e mai scump ca unul de iesire......

 

https://www.sowter.co.uk/acatalog/E_A_Sowter_Ltd_INTERSTAGE_TRANSFORMERS_21.html

 

Ba chiar au aparut si  "FAKE "......

 

A customer approached me and show me his 211 SE amplifier he bought many years ago. He told me that the 211 SE amp need repair because left channel is not working. A quick check with multimeter, I found that the interstage transformer was open circuit. The left channel interstage transformer had been removed by me , and shocked to see whats inside the it. I found a badly built/ mount plate choke under the cover, with coupling capacitor and grid resistor in it too. I removed the right channel " interstage " as shown in this video.

 

 

 

In lista Sowter nici unul nu poate substitui precizia transformatorului prezentat de mine, nici in SE to PP, nici in PP to PP... poate la nivel maxim de semnal dar nu mi-am propus sa conduc cu el tuburi de 5kV si 1kW... :-)

 

Mai departe, in nemernicia lui falsificatorul din video-ul anterior mi-a dat ideea ca intr-un blindaj de interstage ar putea incapea doua drosele pentru configuratie parafeed; bunaoara unul de 1-200H pentru anodica si unul de 1-2kH pentru grila tubului de condus, poate o sa experimentez asa ceva cind voi avea vreme (si sigur n-am sa ascund un WIMA inauntru! :-) ). Un drosel de 2kH (cit o nuca mai mare), inclusiv cu masuratori pina peste 1MHz.

Edited by Marian
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