Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Remedial Pearl Phono Questions -  NOOB Alert
Remedial Pearl Phono Questions -  NOOB Alert
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Thread Tools Search this Thread
Old 24th May 2004, 04:53 PM   #1
hatfield is offline hatfield  United States
diyAudio Member
hatfield's Avatar
Join Date: May 2004
Location: Montgomery Co., MD
Question Remedial Pearl Phono Questions - NOOB Alert

Hello all,

I've spent the past few weeks trolling through the forums (esp. the Pass Labs forum), and I've decided to take the plunge and build a Pearls.

I've had little experience with EE, soldering things here and there, but never building circuits from scratch.

So, Karen sent me the PCBs and the Q-pack; I purchased the remaining parts; and all things considered, did a commendable job assembling the boards... and now I'm stuck with a few lingering questions.

I'm sure these will be of the remedial, EE 101 variety; but nonetheless, you all seem like a very tolerant and welcoming group and will perhaps humor my newbie quires.

My first question is regarding loading and the R1 value. I understand the concept of cartridge loading, but I want to be sure the Pearls will indeed require a resistor in the R1 spot (as opposed to it's "default" loading set by the by the 47K resistor in the R27 spot).

Second, are C14 and C16 required, or can they be omitted? Typically, I've seen MC's loaded @ 10,000 pF and MM loaded @ 220 pF. I they need to be included, what should their values be and why would I need two in a series?

Third - which kind of pertains to my 1st two questions - what exactly are the jumpers for? I'm assuming if I were to bypass R1, C14 and C16, I would connect the jumpers w/in each position... but I rather ask the question than guess and potentially screw up the work I've done.

Now, I'm currently using a .5mV MC cart; however, I'll most likely pick-up a MM or Moving Iron cart that will complement the Pearls. Once I get a better understanding for things, I may try to incorporate a head amp into the system to accommodate low output MC carts.

Again, I'm sure some of you my have a chuckle at my questions, but everyone’s gotta start somewhere

Thanks in advance for any insight you may be able to lend!!!

"One good thing about music, when it hits you feel no pain."
  Reply With Quote
Old 24th May 2004, 06:01 PM   #2
Karen is offline Karen
diyAudio Member
Karen's Avatar
Join Date: Sep 2001
Location: Foresthill, CA

The input loading of 47k is a default for a MM type cartridge. If you were to use a M/C , you would add a 100 ohm resistor to the R1 spot. C14 and C16 can be omitted. If you are going to pick up a new cartridge, Waynes suggests a 2mV M/M is the best performer for the Pearl.

The jumpers connect the parts to the circuit, in case you change your mind about the cartridge later. (easy to eliminate, pull the jumpers)

Good luck, we're all counting on you.
  Reply With Quote


Remedial Pearl Phono Questions -  NOOB AlertHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Pearl Phono questions Fitz Pass Labs 7 11th January 2009 03:36 PM
Pearl phono questions, please read and answer Boban Pass Labs 14 29th December 2005 03:16 PM
pearl phono questions rexrex Pass Labs 1 9th August 2004 06:55 AM
Remedial DAC design questions tommyp Digital Source 0 25th September 2003 03:50 PM
Pearl phono preamp questions Ren Pass Labs 19 22nd May 2002 02:17 PM

New To Site? Need Help?

All times are GMT. The time now is 05:05 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio