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As others have said, high end audio goes into the realm of non-book theory. What actually happens is not what you’re thought at school. It resembles radio behaviour. All sorts of weird stuff going

'Galvanic' isolation means no common electrical connection, intrinsic means no common electrical connection with a specified safety factor, if unspecified, it would generally mean isolated up to the

I like it, use a super fast, low noise opamp to do the summing and monitor the output. By chance did an amp with ungodly high TIM happen to be a Crown DC-300? [What an overrated POS] I worked part

Found a few low voltage isolated buck converters on Amazon, 12/24vdc in, 12/5vdc out. While I could make those work, the cost is high. I need something that is able to deliver 12vdc, at least

I meant to add, do not carry the AC Mains ground through to the 5V V-/ground! You'll introduce more noise then you'd believe possible.

Hafler, an amplifier engineer/manufacturer came up with a very clever and simple test procedure: Divide down the output with two resistors and sum it with the input signal also using two

I've been dragooned to help a friend I've known since the second grade. Jimmy designs and builds ultra high end audio systems, he builds everything up to the speakers. Recently he's ran into some odd

Some of these are supposed to have tcxo mine had an unmarked Plain xo. Replacing it with a cheap aliexpress 0.5ppm tcxo made an enormous difference And checked against my gpsdo is rock solid at 10mhz

I've stayed out of this thread because I post too much. Anyway I tried several of these modules and found them to be useless for any thing resembling precision. I had 3, one in each color, and all

fwiw,i cut a track and fed the rear of the pcb,ie the vhf+ side of things,this now has its own rf feed,it now reads well on 2m vhf and 70cms uhf.

no selinieum in this just a few diodes.

If the power supply in question has selenium rectifiers they need to be changed. They weren't great to begin with, very high internal impedance, and they don't age well. If the paint protecting the

It will leak eventually, but the drives are hermetically sealed, so the leaks are VERY slow. Donald.

I've heard of that. I only hope that I can find out about it before I purchase anything like that. It strikes me as a really bad idea... It doesn't matter what you put it in, helium *will* leak.

The 5020 is s Zaurie power supply model that was heavily pushed / reviewed in early 1970s. I got mine in 1978, used, from a garage sale. Heavily abused, and if memory serves, used a selenium stack

The following items have been added to the Files area of the [email protected] group. * /counter info..pdf ( /g/electronics101/files/counter%20info..pdf ) *By:* paul larner

more info inc schematic uploaded to files section.

Has anyone tried cutting tracks to separate the high and low inputs? This shows a conventional preamplifier for each channel paralleled at the input, each channel using a dual gate MOSFET as a

thanks,it has no valves in it,,so dont know about the 6.3v windings,what is the 5002 you mention?,cheers paul. [email protected]> wrote:

Found your pics in photo section. Labeling on transformer yields 1A across all windings, likely because they are all a common center tap. I would expect the 6.3v winding to be around 3Amps? Is there