Just one question
Have still one question about the tube buffer.
I want to regulated the supply of it to.
Think the LM317 will do the job, or do some of you have
a better idea?
Thanks
Have still one question about the tube buffer.
I want to regulated the supply of it to.
Think the LM317 will do the job, or do some of you have
a better idea?
Thanks
You can use the LM317.
But then, you'll need a transformer at around 2x27~2x30v, because you're regulating at 35v for the buffer.
But then, you'll need a transformer at around 2x27~2x30v, because you're regulating at 35v for the buffer.
Re: Re: question about circuit for rvbnigc
So if I go dual mono, with two regs per channel (one for plus and one for minus), how much current must each of the four regulators be able to handle?
3.4 amps divided by 4?
jackinnj said:
So if I go dual mono, with two regs per channel (one for plus and one for minus), how much current must each of the four regulators be able to handle?
3.4 amps divided by 4?
Re: Re: Re: question about circuit for rvbnigc
Each mono-channel is going to draw 3.4 amps, peak, into an 8 ohm load. If your load is lower impedance (which it usually is in real life) the current will be greater. The math is all worked out for you in the form of an Excel spreadsheet on Nat Semi's website.
I would like to see the square wave or pulse response of a regulated GC vs a non-regulated flavor.
bequerel said:
Each mono-channel is going to draw 3.4 amps, peak, into an 8 ohm load. If your load is lower impedance (which it usually is in real life) the current will be greater. The math is all worked out for you in the form of an Excel spreadsheet on Nat Semi's website.
I would like to see the square wave or pulse response of a regulated GC vs a non-regulated flavor.
You're talking about absolute maximum current and this is not a class A amp, an music is not a continuous tone!
The LM338 handles 12A absolute maximum, enough for two LM3875 or LM3886 chips, and MUCH better than with an unregulated PSU with 1000uf per rail (the compromise this chips need to sound good).
IMHO and whatever.
Talking just by theory may be misleading.
Try it.
The LM338 handles 12A absolute maximum, enough for two LM3875 or LM3886 chips, and MUCH better than with an unregulated PSU with 1000uf per rail (the compromise this chips need to sound good).
IMHO and whatever.
Talking just by theory may be misleading.
Try it.
Gee, thanks.😎
Actually they are from Spain, have a site in portuguese but any store here...
I didn't search everywhere here, just two places, gonna search a little more and if I can't find them, I'll order online (not a thing I like to do...).
Thanks tbla.
Actually they are from Spain, have a site in portuguese but any store here...
I didn't search everywhere here, just two places, gonna search a little more and if I can't find them, I'll order online (not a thing I like to do...).
Thanks tbla.
hi carlos.....go ahead, just order online - it shouldn't cause you any trouble.
make shure to read the data sheet, the lt1083 needs a cap on the output (the lm338 doesn't) ........let us know how it goes.......🙂
make shure to read the data sheet, the lt1083 needs a cap on the output (the lm338 doesn't) ........let us know how it goes.......🙂
Yes Carlos - go ahead and try these LT1083 regs! 😉
At over 11 UKP each
, I will want to hear your opinion before spending my own money 😀
At over 11 UKP each
, I will want to hear your opinion before spending my own money 😀Nuuk said:At over 11 UKP each
😱 
That's slightly better (around 9 UKP) but then there is shipping costs and that minimum order charge.
If I was convinced that they would sound so much better than the LM338, I would suggest a group purchase!
Then again, if you order 10 or more from Farnell, they are about the same price with a 20 UKP minimum order charge!
Nuuk said:
They have OPA627 to for 19.50€ and LM338 for 4.55€, also MUR860 for 0.53€/u and very good prices for trafos : 2x18v 330Va for 33€ and 2x18v 500Va for 39€.
Marc
Idefixes said:
😱
Some months ago I saw the LM338s here at around 4€ each.
I bought 2.
One week later, at another place, I asked the price and the guy said 2€.😱
I bought all the stock they had: 6 .
😀
Ahh yes. I thought there would be a complement to the 338, apparently not.
BTW, looking at the data sheet, it seems the 338 is better than the 1086 in the higher freq range on ripple rejection and output resistance. 338 seems a good choice here, I didn't know the chip.
Jan Didden
BTW, looking at the data sheet, it seems the 338 is better than the 1086 in the higher freq range on ripple rejection and output resistance. 338 seems a good choice here, I didn't know the chip.
Jan Didden
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