pre amp output delay circuit? - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

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 19th September 2009, 09:02 AM   #1
tomat is offline tomat  Indonesia
diyAudio Member
 
Join Date: Dec 2007
Location: east java
Default pre amp output delay circuit?

anyone can give suggestion for simple delay output circuit for tubes preamp?,that could be delayed about for 15 to 20 second.
thanks
  Reply With Quote
Old 19th September 2009, 09:49 AM   #2
diyAudio Member
 
aardvarkash10's Avatar
 
Join Date: Mar 2007
Location: Auckland, NZ
Default schematic would be good

and would help in identifying the best solution
__________________
"Folks, you can't prove truthiness with information. You prove truthiness with more truthiness. In a process known as truthinessiness." - Stephen Colbert, The Colbert Report
  Reply With Quote
Old 19th September 2009, 09:56 AM   #3
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
Default NE 555 timer

You could use a NE555 timer chip to get you any time delay you want. It could drive a relay connected to the output. Use a small resistor in the output circuit ( series with the output capacitor ) and relay contacts shorting to ground when the coil is not energised. That way the relay contacts will not be in the signal path.
The whole circuit could be powered by the heater supply.
__________________
AM
  Reply With Quote
Old 19th September 2009, 10:18 AM   #4
diyAudio Member
 
Geek's Avatar
 
Join Date: Sep 2004
Hi,

I have a critter that may be of help:
http://www.classicvalve.ca/surplus.html#DELAY

Cheers!
  Reply With Quote
Old 19th September 2009, 10:49 AM   #5
tomat is offline tomat  Indonesia
diyAudio Member
 
Join Date: Dec 2007
Location: east java
Quote:
Originally Posted by ashok View Post
You could use a NE555 timer chip to get you any time delay you want. It could drive a relay connected to the output. Use a small resistor in the output circuit ( series with the output capacitor ) and relay contacts shorting to ground when the coil is not energised. That way the relay contacts will not be in the signal path.
The whole circuit could be powered by the heater supply.

thank you ,and may you have the schematic for this?
  Reply With Quote
Old 19th September 2009, 10:56 AM   #6
tomat is offline tomat  Indonesia
diyAudio Member
 
Join Date: Dec 2007
Location: east java
Quote:
Originally Posted by Geek View Post
Hi,

I have a critter that may be of help:
http://www.classicvalve.ca/surplus.html#DELAY

Cheers!


thank you ,i will look for this
  Reply With Quote
Old 19th September 2009, 03:36 PM   #7
diyAudio Member
 
ashok's Avatar
 
Join Date: Jun 2002
Location: 3RS
"...............and may you have the schematic for this? ........."

No I don't but I could put one up for you. However I am going out of town in a few hours time and will be back on Monday. So if you don't see one please post again.
What is the power supply for the heater? Can you put up a circuit diagram of the heater power supply. Transformer rating and rectifier circuit if you use dc for the heater. It could be 6 V or 12 V or something close to it.
__________________
AM
  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
help with an ne555 delay circuit jarthel Parts 8 19th October 2006 01:14 AM
Stereo delay circuit? keantoken Everything Else 0 30th August 2006 12:35 AM
Is passive delay circuit possible? MXM Car Audio 7 26th November 2004 09:40 PM
B+ delay circuit joeling39 Tubes / Valves 11 23rd September 2003 11:38 PM


New To Site? Need Help?

All times are GMT. The time now is 04:44 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