john curl said:Well, KBK, my input good enough for you?
I'm reading.....
However, getting the audiophiles (ie, BUYERS) off the 'noise bus' When it comes to understanding what they are hearing..and their near universal aspect of mistaking that for 'reproduction'..well..that is a bit of an ornery and thorny task, at best.
PMA, good to see you here. I was wondering if you could do me yet another favor? IF you could take my patented circuit, simplify it to just 2 complementary idealized devices with no emitter resistors (at first), I would like to know how linear that circuit is below 100mV output. I suspect that you might be surprised (again). If you can't, I will understand.
john curl said:IF you could take my patented circuit, simplify it to just 2 complementary idealized devices with no emitter resistors (at first), I would like to know how linear that circuit is below 100mV output.
John, would you kindly post a link, or send me an image/info by e-mail, just to save my time.
Thanks.
Thanks for the input, John. I appreciate it.
I have a bunch of both the BF861 and BF862 as I thought that I had a found jewels in these. ..
I asked Philips / Sweden about the low freq noise characteristics for them, but got no reply.
80nV / sqrt(Hz) at 1Hz sounds resonable, and my smulations show about 150nV/Sqrt/Hz). Attached.
Sigurd
I have a bunch of both the BF861 and BF862 as I thought that I had a found jewels in these. ..
I asked Philips / Sweden about the low freq noise characteristics for them, but got no reply.
80nV / sqrt(Hz) at 1Hz sounds resonable, and my smulations show about 150nV/Sqrt/Hz). Attached.
Sigurd
john curl said:Sigurd, I think your latest characterization of the BF861 is fairly accurate. I asked again about the number of 80nV/rt. Hz regarding the BF862, and my source backed down a little and told he thought that it was what it measured at 1Hz instead of 10Hz. He was just quoting from memory, but he DID find that they were way out of line for low frequency use, in general. They are really RF devices.
Attachments
john curl said:Pretty good for 35 years ago, isn't it?
.............
Most people are more inventive when they are young.
Cheers,
Edmond.
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