Not that I know, here's a close up. Furutech says upper tap is Earth. The lower two tabs go directly to the transformer.
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1A is absolutely enough, for a transformer with zero load..
But Oleg is right, the same test You can do much better with the tester.
Pull out the line plug, so you have your socket free. Test continuity between the two extreme leads. (this is the primary, should be some ohm)
Then test for continuity between center plug in the socket (PE) and line pins (extremities)
All this with the PE wire in place.
Ciao, George
But Oleg is right, the same test You can do much better with the tester.
Pull out the line plug, so you have your socket free. Test continuity between the two extreme leads. (this is the primary, should be some ohm)
Then test for continuity between center plug in the socket (PE) and line pins (extremities)
All this with the PE wire in place.
Ciao, George
You are right, this looks OK on this foto, indeed.
But the above test with multimeter would tell if there is a leakage at some other part..
But the above test with multimeter would tell if there is a leakage at some other part..
Was also nothing wrong with continuity, tests were fine.
But.
Changed the screw terminal and put it in the air and everything worked fine. It was the only thing I changed. 23,8 volt on every pair.
So maybe the screw terminal leaked? It looked fine... Anybody any idea?
I really appreciate all your support! Hope the amplifier will work at first try.
But.
Changed the screw terminal and put it in the air and everything worked fine. It was the only thing I changed. 23,8 volt on every pair.
So maybe the screw terminal leaked? It looked fine... Anybody any idea?
I really appreciate all your support! Hope the amplifier will work at first try.
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Andrew, I can't source the incandescent bulb: my whole house is led or halogen, and stores aren't allowed to sell those things anymore. Correct me if I'm wrong, but I was under the impression a light bulb only works with the incandescent bulb. That's the reason I didn't build one. All the other parts were already acquired, but I never found the last
If not, please elaborate what I should or could use.Offtopic: read somewhere that those new IOT/connected LED bulbs use more energy than the old incandescents. Go figure
I don't know if they are there. Maybe you can find it somewhere buried in this thread or in one of the developing threads of the MyRef FE.
But just buy them from Dario, I think there's a groupbuy right now, or starting one very soon. From what I hear it's kind of a headache to find a decent supplier.
PCBs files are not available, I organize group buys a couple of times a year.
If you're interested I've some spare boards, PM me.
I finally put a bulb tester together late last year when I started building a Class A amp. I was surprised how hard it was to find incandescent bulbs, even though it is still legal here in the US.
Glad you figured it out.
Jac
It is alive!!!
White smoke!
The relais popped/clicked, the red LEDs are burning and a soft buzzing of the transformers. No weird hotness around parts, so it should be ok!
Measurements and soldering of input and output will be a job for tomorrow. Thanks for all the help today
White smoke!
The relais popped/clicked, the red LEDs are burning and a soft buzzing of the transformers. No weird hotness around parts, so it should be ok!
Measurements and soldering of input and output will be a job for tomorrow. Thanks for all the help today
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White smoke has less positive connotations when starting up electronics....
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Hehe, I know. Very happy I didn't see any...
Did you put the MyRef in your main system yet? How does it compare to your tube amp? Or still scared that the MyRef is better😀
Been too lazy... But will try it this weekend... Since I'm taking it to the zelfbouwaudio.nl day in Breda
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Ah, not able to go there myself. Too far away from Haarlem. Let me know how it went and what they thought about it. Last year I went to Breda (I think) with my troels gravesen DTQWT mkIII to see how it sounded with some very special tube gear. Liked the solid state amp better on those speakers. That's when the search for another amp started. So beware 😉
I think Dick Van Merwe will be there too (audio-creative). Should be a few notches above the standard gainclone he likes so much...
I think Dick Van Merwe will be there too (audio-creative). Should be a few notches above the standard gainclone he likes so much...
Hmm, not so happy anymore: nothing happened at first startup this morning. fuses keep blowing. Without anything connected everything is fine. With transformers connected it won't work. Any ideas?
Wiring is really basic now and straight to screwterminal, no on/off switch
Wiring is really basic now and straight to screwterminal, no on/off switch
You used naked fast-on connectors on the transformers secondaries. There is a chance that those connectors touch each other or the nearest rectifier diode and thus short the secondary. I would suggest to dress those connectors in shrink tube even if it is not what causes you trouble now.
Also if you now have only 1A fuse (you mentioned this is the only one which is left in your parts bin) it may be too little for the inrush current of two MyRefs PSU filter capacitors. Other than these two scenarios I am out of ideas on what can be wrong with your setup.
Also if you now have only 1A fuse (you mentioned this is the only one which is left in your parts bin) it may be too little for the inrush current of two MyRefs PSU filter capacitors. Other than these two scenarios I am out of ideas on what can be wrong with your setup.