coupling capacitor intermediate values - 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 12th February 2005, 07:47 PM   #1
adam12 is offline adam12  United States
diyAudio Member
 
Join Date: Mar 2004
Location: Newark CA
Default coupling capacitor intermediate values

I'm making my first tube power amp which requires 150nF 400V coupling capacitors between the driver and power tubes. I was trying to use audio grade capacitors but I am having trouble finding this intermediate value. Am I better using a 100nF or 220nF or using a combination to get closer to the 150nF? Any recommendations would be sincerely appreciated.
Thanks
Adam
  Reply With Quote
Old 12th February 2005, 08:58 PM   #2
diyAudio Member
 
Sch3mat1c's Avatar
 
Join Date: Jan 2003
Location: Milwaukee, WI
Send a message via ICQ to Sch3mat1c Send a message via AIM to Sch3mat1c
Either one will be suitable alone.

Tim
__________________
Seven Transistor Labs
Projects and Resources
  Reply With Quote
Old 12th February 2005, 09:10 PM   #3
diyAudio Member
 
Join Date: Apr 2004
Location: Monroe Township, NJ
Without seeing the schematic of the amp you are building, giving advice is a bit of a guess. However, I say go with 220 nF. A coupling cap. forms a high pass filter with the grid resistor of the following stage. You might lose some bass if you use 100 nF.
__________________
Eli D.
  Reply With Quote
Old 12th February 2005, 09:44 PM   #4
adam12 is offline adam12  United States
diyAudio Member
 
Join Date: Mar 2004
Location: Newark CA
Thanks for the replies Tim and Eli. I am trying to make the Vanderveen Plitron el34 push-pull. http://www.plitron.com/PDF/PB/Article/Atcl_4.pdf

After a bit of searching I ran across the partsconnexion which has a huge selection of both the values I need and a wide selection of audio caps. I couldn't find a way back to the moderator to stop the post but thank you just the same for the information.

I hope I made a reasonable choice. I have been mulling this over for way too long and just had to jump in at some point. It's ime to get busy. I liked the idea of being able to try out several amplifier arrangements with modifications to one basic assembly. I know it is push-pull but I have to start somewhere.

Happy listening.

Adam
  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
values of ground(?) coupling caps in Aikido cbutterworth Tubes / Valves 1 31st October 2007 03:53 PM
Calculating values for input coupling capacitor officeboy Chip Amps 14 29th January 2006 04:41 PM
Coupling cap. values??? stoo Tubes / Valves 1 8th January 2006 04:39 AM
changing (de)coupling cap values Klimon Tubes / Valves 14 25th April 2005 09:33 AM


New To Site? Need Help?

All times are GMT. The time now is 03:59 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