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.

Which relay for audio?
Which relay for audio?
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 12th April 2012, 07:49 AM   #1
jeepy is offline jeepy  Switzerland
diyAudio Member
Join Date: Feb 2010
Default Which relay for audio?

Hello All, I have a bunch of small Teledyne 712 relays in TO39 pakage and also some big Clare HGR2M with wet contacts (mercury) relays. Are they any good for small audio signal switching from 2mv to 5V?
  Reply With Quote
Old 12th April 2012, 07:54 AM   #2
analog_sa is offline analog_sa  Europe
diyAudio Member
analog_sa's Avatar
Join Date: Aug 2002
Location: Cascais
Dunno how good those are. Why don't you just put them in the signal path and take a listen? Surely this would be more valuable than the opinion of strangers with unknown hearing deficiencies

I like the Panasonic TQ2. Digi-Key Part Number 255-1002-5-ND

Last edited by analog_sa; 12th April 2012 at 07:58 AM.
  Reply With Quote
Old 12th April 2012, 10:00 AM   #3
PChi is offline PChi  United Kingdom
diyAudio Member
Join Date: Jan 2012
Location: Staines, UK
In my opinion any relay design for small signal switching should be OK.
The Panasonic TQ2 contacts are gold plated which is good for small signal.
The Teledyne relays also look good, they are using gold contacts.
I prefer and have used reed relays where the contact is sealed from the outside world to prevent contamination.

The problem with general purpose relays is that after time the contacts can go high resistance when switching small signals. When switching a few volts they are OK because I presume the volts and current break through the oxide. I think that they use silver plated contacts which oxidise, OK for power but non ideal for small signal. The trouble with gold plating is that it isn't very durable so isn't good for power relays.

I don't know about mercury relays. I don't think that they are necessary and I am not to keen on using the metal. Interestingly it is OK now to use it because it is 'Green' or at least someone has made money out of manufacturing / subsidies for flourescent lamps.
  Reply With Quote


Which relay for audio?Hide 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
Cambridge Audio A3i Relay BradNad Solid State 17 25th September 2015 11:12 PM
WTB: Audio Signal Relay gabanyayaya Swap Meet 1 10th April 2011 02:01 PM
Relay Question on PS Audio 200c Pure_Brew Solid State 9 29th May 2010 02:26 AM
Switching audio signals with relay niral622 Solid State 11 19th April 2004 04:28 PM
Audio amplifier output relay delay PH Solid State 5 18th April 2004 05:55 PM

New To Site? Need Help?

All times are GMT. The time now is 06:32 AM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio