Never tried a ss buffer as such. Had a few valve ones. One ive got now is by far the best especially modded. Not always needed i will accept but in general if its not needed it doesnt do much if anything.
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Never tried a ss buffer as such. Had a few valve ones. One ive got now is by far the best especially modded. Not always needed i will accept but in general if its not needed it doesnt do much if anything.
Thanks Jez. :)Quote:
Originally Posted by Arkless Electronics
I was well impressed with the Arcaydis solid state buffer before it started going hiss, chuff, warble, thump.
If yours is as good sounding, but without the hiss, chuff, warble, thump (I can't imagine it won't be) I shall spread the word. :D
Cheers :)Quote:
Originally Posted by jandl100
OK well I've designed it and pro forma specs are as follows:
Frequency response: 0.15 Hz - 5000 KHz (no that's not a typing error)
Input impedance: 1 Megohm
Output impedance: 23 Ohm
THD: <0.005%
Maximum output level: 9V RMS
If anyone else wants one for the same £75 I'm doing the first one for Jerry at then orders to be in by noon tomorrow when I'll be ordering parts. I should have quoted a bit more but will honour this one and any orders placed by noon tomorrow at that price.
Being a bit of a numpty here - but what is the advantage of using a buffer stage? If the source output impedance is low, and the input impedance of the item next in line is high, what is the problem?
That is the attitude. Give them want they think they want. Whether you think it is deluded or not.Quote:
Originally Posted by Arkless Electronics
We go to work to make money, not to make a point. Sure give advice, point out the absurdity, but people will still want such a thing. Distortion boxes are fun.
I've no idea... But the customer is always right.... and so the customer will get a very good buffer stage which will do exactly what the specs describe. It will buffer from high impedance, giving zero voltage gain, a wide frequency response, very low distortion and offer a a very low output impedance, as seen by the next stage, of 23R. It will do so using discrete single ended circuitry. Adding one of these straight after a passive pre basically makes it an active pre of the purest possible topology.... and I'll try it in that context in my own system out of interest :)Quote:
Originally Posted by Barry
I'm learning :)Quote:
Originally Posted by User211
Here's an extra I'll put in, having just thought of it... I'll make the output impedance 75 Ohms. Still well low, but matches the characteristic impedance of most coax interconnects used at audio frequencies...... (Puts tin foil hat down...) I don't expect it to make any difference and theory says it won't, but I've read a few "audiophile things" claiming it makes a difference... and as all it takes is to replace two resistors with two different resistors, it costs nowt... There's no down side to it and it's one less thing to worry about if you believe interconnects matter as yes, you are driving the cable at its correct characteristic impedance.
Technical types move away from the keyboard! Yes I know that the interconnect would need to be several miles long for it to matter... As I say, and you surely must agree, there's no down side to it... hey I'm reaching out to the subjectivists in unknown territory here!
.... don't forget to add a sprinkle of audiophile magic flooby-dust, Jez. :thumbsup:
You know, I'm getting quite excited by this, if expectation bias has anything to do with it I am going to be very happy with Jez's new buffer. :lol:
Feel free to post some pics of the construction. :popcorn: