Hey Eric, I'm back to the Pearl II after going through a bunch of commercial phono stages (XP-15, NuVista Vinyl, JC3+, etc.). It really is a strong performer. It found it's way back into the system because the NuVista Vinyl doesn't get along with the Korg B1 (figure that one out). I'm interested in playing around with the Pearl II a bit.
You build your own cartridges...impressive 😀
You build your own cartridges...impressive 😀
Pass DIY Addict
Joined 2000
Paid Member
Ha! That WOULD be impressive! I wish I could claim to be that talented 😀
Since the Pearl 2 is my first phono stage, I have nothing to compare it to. The last time I spun some vinyl was more than 30 years ago. What a kick going back through my album collection! Every now and then, I toy with the idea of a tube-base phono stage, but I don't think I have any more room...
There's the Bigbottle preamp:
Bigbottle MM/MC Hybrid Valve Phonostage PCB
https://www.diyaudio.com/forums/ana...e-phonostage-builders-thread.html#post6162693
They're just putting together the list for the second batch of boards... ;-)
Bigbottle MM/MC Hybrid Valve Phonostage PCB
https://www.diyaudio.com/forums/ana...e-phonostage-builders-thread.html#post6162693
They're just putting together the list for the second batch of boards... ;-)
I was checking all my parts for spec today and got to the three picoF caps, 100, 10, and 5pF My DMM was right for everything except these, which gave readings of 0.228 nF, .118 nF and .108 nF. (Yes, nF, not pF.) Are they just too small for an accurate reading or was I sent the wrong values? My DMM is not expensive or a Fluke, but it’s always been reliable.
Also what on earth can 5 picoF do? I realize a Farad is a lot of energy and most of our values are microF, but 5 trillionth? Just curious.
Also what on earth can 5 picoF do? I realize a Farad is a lot of energy and most of our values are microF, but 5 trillionth? Just curious.
Oh boy, here’s an easy one: my Antek trans has two red, two black AND a purple wire with the primaries. What does purple connect to?
Purple is the wire to the internal shield. it goes to chassis ground.
Meter out the green wires to the blue wires (continuity). Take a green and measure it through your meter to one blue at a time, when you hear a beep you have a pair (one winding). Use these pairs to wire to their corresponding rectifiers. Does that make sense?
Meter out the green wires to the blue wires (continuity). Take a green and measure it through your meter to one blue at a time, when you hear a beep you have a pair (one winding). Use these pairs to wire to their corresponding rectifiers. Does that make sense?
This is good advice - I’ve always paired mine visually, and am now kicking myself for not thinking to do this.
I bought snap-on 3300uF caps instead of radial leads. Rats, and there are eight of them! Any good options besides new caps?
Hi,
I had bought all the parts to build a Pearl 2 a while ago, but ended up building the new version of the Salas Folded Simplistic Phono first. I would like to build the Pearl 2 now and I am wondering if I can somehow use the same power supply. For the Salas I used a dual mono Salas UBIB supply, which is two separate +32, 0 volt DC lines to feed each board. I am using two Talema 15 volt transformers that I wired in series to get 30 volts out of them, because I had them sitting around.
Is it possible to turn this into a single bipolar power supply by reversing one of the supplies to feed the negative portion of the Pearl boards?
I am thinking not because I can't really tie the 0 volt lines together in such a setup, but thought I would ask.
I had bought all the parts to build a Pearl 2 a while ago, but ended up building the new version of the Salas Folded Simplistic Phono first. I would like to build the Pearl 2 now and I am wondering if I can somehow use the same power supply. For the Salas I used a dual mono Salas UBIB supply, which is two separate +32, 0 volt DC lines to feed each board. I am using two Talema 15 volt transformers that I wired in series to get 30 volts out of them, because I had them sitting around.
Is it possible to turn this into a single bipolar power supply by reversing one of the supplies to feed the negative portion of the Pearl boards?
I am thinking not because I can't really tie the 0 volt lines together in such a setup, but thought I would ask.
May I ask why you want to build the Pearl II? Just curious...any and all answers will be accepted.
Mainly because I already have all the parts, and I am locked out of tennis courts, restaurants and bars for the immediate future. I'd kind of like to hear what it sounds like too.
Yes, I can appreciate that answer. I can only wish that was the case for me. I find myself busier than ever during this “crisis”. I have two kids who are not in school...that’s a big part of it. Looking forward to getting back to work and having MORE free time.
Are the matched jfets included with the boards from PassDIY Linear Systems or Toshiba manufacture? Also, does it make any difference besides the allure of unobtainium? 