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In Reply to: RE: toroids posted by RayP on January 22, 2017 at 05:10:22
Hello Ray, like minds :)
I have several 100va 115v+115v dual 6v secondary antek transformers that I have experimented with and they sound remarkably good, but where they lack is low freq definition in the lower 20-35 cycle range, will they get better with use?. what I like about them is there VERY LOW DCR! they can be very dynamic
I have found other uses for them, including common mode choke duty for both my B+ and for my heater supply, the myths of toroids of not standing any DC current is BS in the newer designs, As a matter of fact they work better then any choke I have in the house.
experimentation is paramount as long as you take precautions as I have done
I have a cheap inductance meter and I do not think its measuring is correct because the torroid measures like 4h and my regular outputs measure like 20h
The torroid should measure very high for 100va core
your experiences??
Lawrence
Follow Ups:
Could you provide a diagram of how you wire the toroid as a common mode choke in your B+. I presume this is your plate choke.
Could you also give an example of a newer design that can handle DC.
My experience of toroids as output transformers is very limited since I only used them in a 6V6 amp designed to cost less than $200.
ray
good morning Ray, the same 115v + 115v dual 6v secondary torroid
just use the dual 6v secondary part one on the b+ rail and the other on the neg rail= common mode choke for cheap! just leave the primary leads alone I fuse the neg rail lead just in case the hi voltage wants to short to the neg rail lead. I have used this for a few weeks now with ZERO ISSUES and this is with 1300v dc! make for a quite amp esp with all this hi freq stuff on the power lines these days!
anyways the newer torroids are made differently (core material) that seems to not be bothered my dc, as a matter of fact they do not buzz at all
if you can do a quick experiment give it a go.
Lawrence
That's an interesting idea.
By the way, do you have any more info on the type of core material in the newer toroids. Is Antek using this?
ray
Ray I am looking for some speaker Line matching transformers...the ones i want are 24watts and say 6v6HFL on them
if you or anyone might have a pair or more I would be very interested
Lawrence
I don't have line transformers with that designation. Why do you want them?
ray
I would like them because I have used them years ago
not that there good or anything :)
so if you happen to see a pair please let me know
Thanks
Lawrence
Ray sorry no I do not you could possibly ask them but then they may change it so you cannot use this LOL
I say dont look a gift horse in the mouth or um something like that
just try it
Lawrence
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