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

Parts Where to get, and how to make the best bits. PCB's, caps, transformers, etc.

Picking resistors
Picking resistors
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 9th October 2019, 11:14 AM   #1
carlmart is offline carlmart  Brazil
diyAudio Member
Join Date: Mar 2001
Location: Brazil
Default Picking resistors

I am in the process of picking parts for a power amplifier clone I'm working on and two MM RIAA preamps.

As I am a firm believer, based on many tests we made with a friend, that resistors can make an audible difference (note that I used the word "difference", not improvement), I have been trying to select the parts carefully.

Basing my choices on Mouser availabilities and on Parts Connexion options (some expensive boutique parts), I am making my Excel list with two choices.

For the PC options I centered on PRP resistors, which some people consider a very good compromise for a reasonable price. Even if PRPs can cost twice the price of Mouser's, that is not always the case.

So I think I need further comments on what options to go for, at least for non-critical position parts. So let's state that what I consider "critical" are load resistors for RIAA preamp and feedback resistors for both power amps and preamp.

I would appreciate some further hints, on what you have been using that did add interesting things to the audio quality. And used where.

Lately I have been recommended to prefer Vishay-Dale types, which are not available for every value.

But the quiz part for me is PRP, as I am not sure if they deserve a shot.

Suggestions and comments are welcome.
  Reply With Quote
Old 9th October 2019, 12:24 PM   #2
schiirrn is offline schiirrn  Germany
diyAudio Member
Join Date: Nov 2018
Most positions are "non critical". Are you building solid state or tube gear? Mouser is a good option for picking parts as their search filter is pretty good. When you want stability and low drift e.g. for feedback resistors tricks like picking 4 resistors of the needed value and wiring two in series and then paralleling them.
When you hear a difference between resitors in a certain position check stability of the node on a scope. It might be a sign that the circuit oscillates and the miniscule differences in parasitcs change the behaviour of the instability.
Preferred BSC? Just using a wide enough baffle.
  Reply With Quote
Old 9th October 2019, 01:23 PM   #3
carlmart is offline carlmart  Brazil
diyAudio Member
Join Date: Mar 2001
Location: Brazil
I only build solid state. I'm scared of tube gear high voltages.
  Reply With Quote
Old 9th October 2019, 03:18 PM   #4
Mark Tillotson is offline Mark Tillotson
diyAudio Member
Join Date: May 2018
Location: Cambridge UK
Stick to metal film, and use precision parts where this matters (thermal coefficient is better with higher precision resistors too, note).

These days 1% metal film are not expensive and the go-to resistor for everything.

For surface mount "thin-film" means metal film, they are more expensive though, so only
choose them for the critical positions.
  Reply With Quote


Picking resistorsHide 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
NAD c541i not picking up CD warzinak Digital Source 3 12th January 2012 12:20 PM
need help picking torroid oiphy Power Supplies 2 13th September 2011 05:11 AM
need help picking a sub integrite07 Car Audio 0 27th August 2011 03:52 AM
Need help picking a mid.. PoorSound Multi-Way 44 4th September 2007 07:57 PM
need some help picking some 3-ways adolphe Multi-Way 17 6th September 2005 04:53 AM

New To Site? Need Help?

All times are GMT. The time now is 06:01 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2019 DragonByte Technologies Ltd.
Copyright ©1999-2019 diyAudio