changing output capacitor value? what should I consider?

jarthel · 9th June 2006, 01:41 PM

I was thinking of using 100uF instead of 47uF for the aikido headphone amp (high Z 9pin version: http://www.tubecad.com/2006/04/27/ai..._amplifier.png).

If I do that, would I be changing other values as well? if so, can you tell me what they are and if possible the new values?

I have a feeling changing output cap value would require other changes as well cause John Broskie has several versions of the schematic based on the Z.

thanks for the help.

sawreyrw · 9th June 2006, 10:08 PM

If you are thinking about changing the value to 100uF, you must have a reason for do so. This change will reduce the lower cutoff frequency, which is good. But it may not make much difference in what you hear.

rdf · 9th June 2006, 11:49 PM

What's the impedance of your headphones? 47uF seems awfully small for most popular models.

9th June 2006, 01:41 PM	#1
jarthel diyAudio Member Join Date: Jan 2002 Location: somewhere in Australia	changing output capacitor value? what should I consider? I was thinking of using 100uF instead of 47uF for the aikido headphone amp (high Z 9pin version: http://www.tubecad.com/2006/04/27/ai..._amplifier.png). If I do that, would I be changing other values as well? if so, can you tell me what they are and if possible the new values? I have a feeling changing output cap value would require other changes as well cause John Broskie has several versions of the schematic based on the Z. thanks for the help.

9th June 2006, 11:49 PM	#3
rdf diyAudio Member Join Date: Jun 2004 Location: big smoke	What's the impedance of your headphones? 47uF seems awfully small for most popular models. __________________ Ears aren't microphones.

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
Best output Capacitor	gearheadgene	Class D	12	8th January 2009 09:28 PM
Changing Output Resistors to Make Current Source Amplifier	gni	Solid State	2	9th October 2007 04:42 PM
changing the value of capacitor	msm677	Car Audio	24	11th July 2007 05:38 AM
MTX RT2200x changing smps output voltag	xplod1236	Car Audio	10	10th May 2007 05:51 PM
Balancing output tubes by changing heater voltage.	Circlotron	Tubes / Valves	8	10th February 2003 11:15 AM

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

9th June 2006, 10:08 PM	#2
sawreyrw diyAudio Member Join Date: Apr 2006 Location: Minnesota	If you are thinking about changing the value to 100uF, you must have a reason for do so. This change will reduce the lower cutoff frequency, which is good. But it may not make much difference in what you hear.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)