I missed this... you mean that you will be using a couple of K82 for the I/V stage of your DAC?
If i misunderstood, apologies.
Hi Telstar
Yes - some misunderstandig - or I made a wrong pronounsement!
The spare SK82 is meant for the preAmp LuminAria that Michael is preparing with a SIT-part. I don`t know if it is the Sony that is the chosen SIT for that project. I had 2 pcs SK82 if my 1.st pair went up in smoke - and maybe they can be used in a pre-amp later(if I ever get tired of my beautiful PassiveB1).
And my DirectDac(HifiMediy) has 2 Sowtech on the output - so fairly full-bodied sound!🙂
Best
Olav
Yes - some misunderstandig - or I made a wrong pronounsement!
The spare SK82 is meant for the preAmp LuminAria that Michael is preparing with a SIT-part. I don`t know if it is the Sony that is the chosen SIT for that project. I had 2 pcs SK82 if my 1.st pair went up in smoke - and maybe they can be used in a pre-amp later(if I ever get tired of my beautiful PassiveB1).
And my DirectDac(HifiMediy) has 2 Sowtech on the output - so fairly full-bodied sound!🙂
Best
Olav
I doubt 2sk82 is suitable for preamp duties. To start it's gain is not high enough not to mention the capacitance problem.
OlavHaal: According to Zen Mod, it is quite possible to keep the bias on these V-Fets all the time; from the time the amp is plugged in the power outlet. This will prevent inadvertent burnout.Yes - some misunderstandig - or I made a wrong pronounsement!
The spare SK82 is meant for the preAmp LuminAria that Michael is preparing with a SIT-part. I don`t know if it is the Sony that is the chosen SIT for that project. I had 2 pcs SK82 if my 1.st pair went up in smoke - and maybe they can be used in a pre-amp later(if I ever get tired of my beautiful PassiveB1).
And my DirectDac(HifiMediy) has 2 Sowtech on the output - so fairly full-bodied sound!🙂
Best
Olav
Best regards
MR , do you have (by any chance ) LTSpice model for 2SK82 ?
where you been lately , cookin' something ?
where you been lately , cookin' something ?
The above quote from Michael's first SIT article got me thinking and I took my bulb's out for a measurement. My bulbs are 300 WATT Philips PS25's Philips | 300W PS25 Clear | Home Depot Canadaand with a meter they all measured 4 ohms. With two in parallel for each channel that makes 2 ohms and my amp seems to be running fine. Very puzzled. 😱
As a comparison I took some 60W incandescents out of the cupboard and they all measured 17 ohms. Hmmmmmmmmm.......
Regards,
Dan
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When the filament heats up the resistance goes up. Check the voltage drop and current and do the math.
Rush
My SIT is up and running quite well but I've been checking various things in search of an answer to one issue I have. On one channel the Id had a range of almost zero up to 2.4 amps. On the second channel the Id would go down to a minimum of .6 amps up to a maximum of 2.6 amps. I solved the problem today by replacing the transistor on channel 2. Now both channels have the same range of Id.
Regards,
Dan 🙂
Hi, ZM. If ballpark is okay, I have approximated SITs with Koren Triodes.
Attention all eggheads: I wouldn't land a probe on Mars with these or get too excited about distortion figures and such. Stay mellow and have fun.
Attachments
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Since Antek is temporarily out of business because of a fire I've looked elsewhere for a toroid for the 193V SIT and this is what I've found. SumR - Richard Sumner Technology has quoted me the following.
Single Primary 117V 60Hz
Four Secondaries
Two @ 15VAC 2A
Two @ 18VAC 8A
Total: 350VA.
With core band and mounting hardware:
Price Cdn $ 105/e.
Double what some Anteks cost but exactly you need for Micheal's circuit.
Regards,
Dan
Single Primary 117V 60Hz
Four Secondaries
Two @ 15VAC 2A
Two @ 18VAC 8A
Total: 350VA.
With core band and mounting hardware:
Price Cdn $ 105/e.
Double what some Anteks cost but exactly you need for Micheal's circuit.
Regards,
Dan
much obliged Mr. MR 😉
I'm primary interested in that because I want to alter some values in one sch, for Generg's 2SK iteration
perhaps we should send him fresh meat to work with.....😀😀
thank you very much ZM for asking....
and Mike for answering....
this idea came not to my mind.....
maybe I need fresh mind meat.....
thank you very much ZM for asking....
and Mike for answering....
this idea came not to my mind.....
maybe I need fresh mind meat.....
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You may want to check out the additional updated models and micro article at:
Audiohobby.com | DIY Audio Projects & More
🙂
Audiohobby.com | DIY Audio Projects & More
🙂
Yeah, saw the Raspberry Pi music server. Neat. I just built a much larger Windows music server for over $700.
I friend is experimenting with the Pi and it sounds better than MS Windows or Mac.
Less going on, I guess.
Rush
I agree. It is interesting, though and for spare change your up and running!
I think the secret is in the smallest version of Linux, everything turned off except music player, USB and network; video off, control through iPad/iPod on network. Load song in memory before you start playing, etc.
It really sounds good.
Rush