Building a Pearl 2

[flip69]

Thank you both for the clarification.

 

[Abx74]

Is there also a substitute for the ZVP3310 ?

Damien

 

[6L6]

No, but it doesn't matter… Mouser has 2000 in stock and 12,000 to arrive this week.

 

[jackinnj]

Re ZVP3310 -- perhaps he was referring to the "twitchiness" of the PMOS -- I think that the Papa had recommended a substitute, but it's buried in thousands of posts. It isn't difficult to fry this PMOS.

 

[Abx74]

Exactly, I find them very very (too much?) sensitive to ESD...

 

[6L6]

I agree, and have replaced a few. The easy solution is to have a few extra on hand when building.
Maybe not the most elegant solution, but once it’s in and working they are fine.

 

[dobbeln]

Hi. The Pearl 2 Boards are on their way to Germany and I'm collecting parts now.
Question: For the Power Supply: is it recommended to use a dual supply (left/ right channel with own trafo,..)?

And just one comment on ESD damage: I saw some of you having components laying on Sheets of paper: this can Generate Lots of "static" volts, destroying sensitive components. Buy some static dissipative bags if you really need the paper there and put them inside these bags. Better: have an ESD-mat properly grounded on your desk as base and store the Papers somewhere Else.
Kind regards

 

[6L6]

Dual mono is not necessary.

Separate PSU enclosure is necessary - Pearl 2 is very sensitive to transformer hum and the RIAA chassis needs to be 1M from any transformer, particularly it’s own.

 

[dobbeln]

Dual mono is not necessary.

Separate PSU enclosure is necessary - Pearl 2 is very sensitive to transformer hum and the RIAA chassis needs to be 1M from any transformer, particularly it’s own.

Thanks

 

[Monk55]

Going into testing very soon. There was a lot to read & absorb in this thread…whew. Fun build. Yes I built a dual mono supply because, well, I could. Thank you to all for a great project.

 

[Monk55]

All voltages tested within range. Off to listen.

 

[6L6]

Absolutely beautiful!!

BTW, you will have noise if you run the Pearl 2 with the RIAA chassis sitting atop the PSU. Put the PSU on a shelf far away.

 

[Monk55]

I’m just blown away how good the sound is. Dead quiet. I’m listening to Dick Johnson & Dave McKenna “Spider’s Blues” recorded at Coast Records April 1980 through Ortofon blue (5.5mv), Wayne’s 2018 pre, and mono block Alpha J’s. Very detailed, bass is very accurate, mids/highs very realistic. Dead quiet.

Thanks Mr Colburn & Pass Labs & DIY store. Also, for this forum and I can’t forget this new look… just fabulous, thanks Jason!!

 

[Monk55]

Absolutely beautiful!!

BTW, you will have noise if you run the Pearl 2 with the RIAA chassis sitting atop the PSU. Put the PSU on a shelf far away.

Totally agree…I listened to all the wise-men out there!

 

[deburgh]

I’m just blown away how good the sound is. Dead quiet. I’m listening to Dick Johnson & Dave McKenna “Spider’s Blues” recorded at Coast Records April 1980 through Ortofon blue (5.5mv), Wayne’s 2018 pre, and mono block Alpha J’s. Very detailed, bass is very accurate, mids/highs very realistic. Dead quiet.

Thanks Mr Colburn & Pass Labs & DIY store. Also, for this forum and I can’t forget this new look… just fabulous, thanks Jason!!

Can I ask what loading resistors you have set for your 5.5mv MM cartridge as i have a similar output im using ?

 

[Monk55]

R19 is 47k. That’s my default.

 

[deburgh]

Sorry I meant to ask what gain resistors at R14

 

[Monk55]

2k at R14, along with 100uf to ground.

 

[peppennino]

Beautiful work, Monk55!

 

[Monk55]

Beautiful work, Monk55!

Thanks. It was a fun build. Turning to Ultralite!