Whats a good..

jleaman · 9th November 2002, 02:04 AM

hell all i have completed my 2 little mosfet amps and they sound good. i perchased a new plitron transformer and caps. just need case now 9 external one is being built as we sleep and live : O ) now to my questio since i have a turn on thump i was wonderin what is a nice simple circut that will work on my 45 volt rails put both together and it is 90v im going to be using my murcury wetted realays that i got. im looking for some thing like 10 seconds or so. and immediat relay cancel after power is off.

any one help me : O ) some one

pinkmouse · 9th November 2002, 08:05 AM

Jason, have you done a search? This has been covered many times before.

But so as not to seem unhelpful, here is a link

http://sound.westhost.com/project33.htm

fcel · 9th November 2002, 01:03 PM

How about this? http://mitglied.lycos.de/Promitheus/...or_toroids.htm

jleaman · 9th November 2002, 03:44 PM

humm still not what im looking for all i want is a relay on a 10sec timer no protection is needed for my amps. NONE!

im thinking about useing a 555 timer ic and make a small circuit for time on and no time off. when the power is turned of from psu relays kick out right away when amp is on 10seconds before speakers are applyed to audio out.

j' O : )

pinkmouse · 9th November 2002, 03:50 PM

If it's a simple solution you want, have you tried a thermistor to slow down the surge into your toroids?

jleaman · 9th November 2002, 04:21 PM

this isnt in my aleph amps just in my class a-b amps that i built and no matter how slow you bring up the power there is still a small pop i would like to get rid of it though with the relay

i bought 2 murcury wetted relays for this reason eheh

daatkins · 9th November 2002, 04:56 PM

JasonL,
I've got a schematic for a simple anti-thump relay circuit on my webpage (look right at the bottom of the page):
http://www.apcl43.dsl.pipex.com/proj_subamp.htm

You can increase the value of R7 (or C2) if you want the delay to be longer.

Nice one,
David.

9th November 2002, 02:04 AM	#1
jleaman Banned Join Date: Apr 2002	Whats a good.. hell all i have completed my 2 little mosfet amps and they sound good. i perchased a new plitron transformer and caps. just need case now 9 external one is being built as we sleep and live : O ) now to my questio since i have a turn on thump i was wonderin what is a nice simple circut that will work on my 45 volt rails put both together and it is 90v im going to be using my murcury wetted realays that i got. im looking for some thing like 10 seconds or so. and immediat relay cancel after power is off. any one help me : O ) some one

9th November 2002, 08:05 AM	#2
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	Jason, have you done a search? This has been covered many times before. But so as not to seem unhelpful, here is a link http://sound.westhost.com/project33.htm __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

9th November 2002, 03:50 PM	#5
pinkmouse diyAudio Moderator Join Date: Apr 2002 Location: Chatham, England	If it's a simple solution you want, have you tried a thermistor to slow down the surge into your toroids? __________________ Al I conceive of nothing, in religion, science or philosophy, that is more than the proper thing to wear, for a while. Charles Fort

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
whats a good diy tube preamp kit	merickrc	Tubes / Valves	40	28th March 2009 10:24 AM
New stock pre -amp tubes. Whats good?	RockysDad	Tubes / Valves	7	3rd March 2006 09:46 PM
Whats a Good 6L6 circuit?	hacknet	Tubes / Valves	34	25th April 2004 07:31 PM
Audio reserach(Good,Bad)whats your oopinion	croft	Parts	7	28th October 2002 12:21 AM
Whats a good 6L6GC Stereo Amp Project	glenn	Tubes / Valves	10	24th February 2002 07:07 PM


	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

9th November 2002, 01:03 PM	#3
fcel diyAudio Member Join Date: Sep 2001 Location: LA County	How about this? http://mitglied.lycos.de/Promitheus/...or_toroids.htm

9th November 2002, 03:44 PM	#4
jleaman Banned Join Date: Apr 2002	humm still not what im looking for all i want is a relay on a 10sec timer no protection is needed for my amps. NONE! im thinking about useing a 555 timer ic and make a small circuit for time on and no time off. when the power is turned of from psu relays kick out right away when amp is on 10seconds before speakers are applyed to audio out. j' O : )

9th November 2002, 04:21 PM	#6
jleaman Banned Join Date: Apr 2002	this isnt in my aleph amps just in my class a-b amps that i built and no matter how slow you bring up the power there is still a small pop i would like to get rid of it though with the relay i bought 2 murcury wetted relays for this reason eheh

9th November 2002, 04:56 PM	#7
daatkins diyAudio Member Join Date: Aug 2001 Location: Bath, UK	JasonL, I've got a schematic for a simple anti-thump relay circuit on my webpage (look right at the bottom of the page): http://www.apcl43.dsl.pipex.com/proj_subamp.htm You can increase the value of R7 (or C2) if you want the delay to be longer. Nice one, David.

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read