Mute circuit in Preamp - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

Solid State Talk all about solid state amplification.

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
Reply
 
Thread Tools Search this Thread
Old 22nd July 2003, 03:04 PM   #1
diyAudio Member
 
Join Date: Jan 2003
Location: East Brunswick, New Jersey
Default Mute circuit in Preamp

I have built a ESP preamp and wanted to put a mute circuit which will be activated via a relay. Any ideas as to how to acomplish the mute???? Should I do it at the input of preamp or at the output??? what value of resistor should I use to ground the signals.
Thanks
Dinesh
  Reply With Quote
Old 22nd July 2003, 11:33 PM   #2
diyAudio Senior Member
 
fdegrove's Avatar
 
Join Date: Aug 2002
Location: Belgium
Hi,

Quote:
Any ideas as to how to acomplish the mute????
A simple DPDT switch is all you need.
Yes, you can trigger a relay that will trigger another relay...but why?

Quote:
Should I do it at the input of preamp or at the output???
At the otput make more sense to me. Just short the output.

Quote:
what value of resistor should I use to ground the signals.
None.

** Be aware that this is just genral advise from someone having no experience whatsoever with whatever topology Rodd Elliot is using in your particular preamp.**

Cheers,
__________________
Frank
  Reply With Quote
Old 23rd July 2003, 09:52 AM   #3
diyAudio Member
 
Join Date: Jun 2002
Location: UK
Default Re: Mute circuit in Preamp

Quote:
Originally posted by dine1967
I have built a ESP preamp and wanted to put a mute circuit which will be activated via a relay. Any ideas as to how to acomplish the mute???? Should I do it at the input of preamp or at the output??? what value of resistor should I use to ground the signals.
Thanks
Dinesh
I also haven't looked specifically at the ESP preamp, but I guess it's op-amp based, like my preamp. I've put some of my thoughts about muting relays at the bottom of this page, for what it's worth...

I would definately recomend putting the muting relay at the output of the preamp - then you can control it using a simple circuit with a time-delay to stop pops and clicks at power-up, and when the mains fails. Perhaps this is what you're thinking?

Cheers,

Mark
  Reply With Quote
Old 23rd July 2003, 05:12 PM   #4
diyAudio Member
 
Join Date: Jan 2003
Location: East Brunswick, New Jersey
thanks mark for the answer. Actually was trying to implement a mute through the remote. I will probably follow what u have done. Very informative web page.
thanks,
dinesh
  Reply With Quote
Old 23rd July 2003, 06:10 PM   #5
diyAudio Member
 
Join Date: Jun 2002
Location: UK
Quote:
Originally posted by dine1967
thanks mark for the answer. Actually was trying to implement a mute through the remote. I will probably follow what u have done. Very informative web page.
thanks,
dinesh
No problem, and thanks

It would be very easy to interface a remote control system with a muting relay - the exact details depend on the remote control system that you have, but it's quite straightforward. Good luck...

Cheers,

Mark
  Reply With Quote
Old 26th July 2003, 03:27 PM   #6
GST is offline GST  Canada
diyAudio Member
 
Join Date: Jul 2003
Location: London
Default Re: Mute circuit in Preamp

Quote:
Originally posted by dine1967
I have built a ESP preamp and wanted to put a mute circuit which will be activated via a relay. Any ideas as to how to acomplish the mute???? Should I do it at the input of preamp or at the output??? what value of resistor should I use to ground the signals.
Thanks
Dinesh
Dinesh,

I am building a mute circuit in a Rozenblit's Grounded Grid Valve Preamp. This is based on the circuit in Morgan Jones "Valve Amplifiers". It uses 74HC74 and 74HC4040 IC flip flop and timer and a few transistors to short output to ground by relays, and needs a +5V supply. It use a 40 second delay, but there are multiple outputs of the counter which will allow for shorter ones. This is good for valves, where you want to turn on the high tube voltage after the filaments but before the output. This might be overkill for you however.

By the way, are you using a remote control circuit for the volume as well? I am looking for an easy RC5 remote control receiver circuit, and motorized potentiometer circuit for my preamp. Anybody else know of sources for this or previous threads on the topic?
__________________
GST
  Reply With Quote
Old 28th July 2003, 01:57 PM   #7
diyAudio Member
 
Join Date: Jan 2003
Location: East Brunswick, New Jersey
Iam using this pre programed chip to do the remote control for volume (motorised pot) and mute.

http://www.rentron.com/remote_control/IR-D14.htm

Most of the stuff I found on the web for such a job were pretty expensive (>$100). This works very good with a universal remote or even a sony remote and has very few components. Hope this helps
Dinesh
  Reply With Quote
Old 28th July 2003, 11:30 PM   #8
GST is offline GST  Canada
diyAudio Member
 
Join Date: Jul 2003
Location: London
Dinesh,

Thanks for the pointer. I wasn't aware of that site. It looks very helpful.
__________________
GST
  Reply With Quote
Old 8th August 2003, 08:13 AM   #9
diyAudio Member
 
Join Date: Aug 2003
Location: SoCal
Have you checked out the Analog Devices SSM8402 (I think that's the part number, check out their website to make sure). This is a dual analog switch in a DIP package, uses dual polarity power supply, and clickless, thumpless operation (very important) and could easily be integrated into the rest of the Rod Elliot preamp.

Good Luck!!
  Reply With Quote
Old 8th August 2003, 08:25 AM   #10
diyAudio Member
 
Jan Dupont's Avatar
 
Join Date: Apr 2003
Location: Copenhagen, Denmark
Send a message via MSN to Jan Dupont
Lightbulb Analog Devices SSM8402

The correct part number is SSM2402 for dual switch and SSM2404 for quad switch.

I intend to use these switches as input selector and mute operation in my preamp...............
__________________
Free Schematic and Service Manual downloads www.audio-circuit.dk, Company: www.dupont-audio.com, Joint venture: www.DupontMantra.com
  Reply With Quote

Reply


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Speaker Mute circuit for power Amp steevo Solid State 8 30th November 2008 03:30 PM
Chip amp mute circuit Original Burnedfingers Chip Amps 10 5th October 2008 05:43 PM
Proton 520 mute circuit diymax62 Solid State 1 9th December 2007 08:07 AM
Looking for a PDA car audio mute circuit Franklin Car Audio 3 10th June 2004 06:47 PM


New To Site? Need Help?

All times are GMT. The time now is 12:33 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2