You know that you guys suck, feeding my addiction like this! Good chance I'll end up ordering 1 to have fun with, but am wondering if anyone has ever compared a Pearl to a Bottlehead Eros 2, that with a Rothwell MCX, are my current phono pre. Thinking about getting the better Lundahl Xfrmrs.
I have built a LOT of phonostages. Pearl 3 is my favorite, and that’s not just “newest project always sounds best”, it’s got the certain hard to define ‘something’ that makes it magical.
I have a Rothwell MC1, it’s excellent. Totally not needed with the high-gain setting on Pearl 3!
If you haven't seen the chassis set that @Gianluca is making, take a look at post #721 https://www.diyaudio.com/community/threads/pearl-3-burning-amp-2023.404054/post-7517405
I have a Rothwell MC1, it’s excellent. Totally not needed with the high-gain setting on Pearl 3!
If you haven't seen the chassis set that @Gianluca is making, take a look at post #721 https://www.diyaudio.com/community/threads/pearl-3-burning-amp-2023.404054/post-7517405
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Completed the mechanical assembly of my Pearl 3. I modified recycled enclosures, did my own brushed aluminum front and back panels. Installed wood panel inside to rise over existing metal standoff. and mounted the pcb on wood. It may help for vibration control. Power connector is not 'stupid proof' but that's what I had in stock... Guessing I won,t need the chassis after all...
Not bad
SB
Not bad
SB
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Yeah, the Pearl 2 was my gateway drug WRT phono preamps. I'm hoping this one will turn out to be my lifetime supply.
On another note...
I took a chance and bought some supposed ZTX851 from "littlediode_uk" on the auction site. I received them yesterday and I suspect they are fake. The other ZTX transistors I have are marked by laser etching. These are marked with negative relief paint. Compare the two photos below. Does anyone have definitive info?
I took a chance and bought some supposed ZTX851 from "littlediode_uk" on the auction site. I received them yesterday and I suspect they are fake. The other ZTX transistors I have are marked by laser etching. These are marked with negative relief paint. Compare the two photos below. Does anyone have definitive info?
I godt 10 pcs yesterday from RS Components (picture to the right with straight legs).
A couple of weeks back I got a batch on paper rails with "bended" legs (so more leg spacing) from a trusted source at ebay. Could be vintage 851.
So the can look different. I am 99.9999 % sure they are real 851.
If they can handle 20A peak current they are probably real 851! .......but I have not tried that.
A couple of weeks back I got a batch on paper rails with "bended" legs (so more leg spacing) from a trusted source at ebay. Could be vintage 851.
So the can look different. I am 99.9999 % sure they are real 851.
If they can handle 20A peak current they are probably real 851! .......but I have not tried that.
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I don't have a PSU in the moment that can output 20A
And that is not 100% true. I have the 36V DC PSU for the VFET amp. The PSU is based on a 2 kW SMPS module. So could be done.
A charged capacitor could also be used as source for the 20A pulse?.
A fun test......even if a few 851 will smoke fast.....
I need a square wave with 1/99 duty cycle.....or so.......a very narrow "on-pulse"?
And that is not 100% true. I have the 36V DC PSU for the VFET amp. The PSU is based on a 2 kW SMPS module. So could be done.
A charged capacitor could also be used as source for the 20A pulse?.
A fun test......even if a few 851 will smoke fast.....
I need a square wave with 1/99 duty cycle.....or so.......a very narrow "on-pulse"?
