Dynakit Mark III amplifier - 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 6th October 2010, 06:57 PM   #1
diyAudio Member
 
rsumperl's Avatar
 
Join Date: Oct 2009
Location: Warren Center, PA
Default Dynakit Mark III amplifier

Greetings all,
What is the 390 pf cap from the screen of the KT88 to the pentode of the
6AN8 for? If it's feedback, I thought the 1K/750 pf from the 16 ohm spkr tap did that.

Thanks,
Ray
Attached Files
File Type: pdf mk3_sch.pdf (37.5 KB, 42 views)
  Reply With Quote
Old 6th October 2010, 07:42 PM   #2
SY is offline SY  United States
diyAudio Moderator
 
SY's Avatar
 
Join Date: Oct 2002
Location: Chicagoland
Blog Entries: 1
It's there to HF balance the two sides of the push-pull to make up for imbalances in though output transformer. The DCR, leakage inductance, and capacitance are different from one half to the other because of the winding geometry.
__________________
And while they may not be as strong as apes, don't lock eyes with 'em, don't do it. Puts 'em on edge. They might go into berzerker mode; come at you like a whirling dervish, all fists and elbows.
  Reply With Quote
Old 6th October 2010, 07:45 PM   #3
diyAudio Member
 
HollowState's Avatar
 
Join Date: Aug 2006
Location: Taxland, New Jersey
AFAIK it's there to tweak the square wave response of the amplifier by correcting for anomalies produced by the output transformer. And it is feedback.
__________________
"I regard the brain as a computer which will stop working when it's components fail. There is no heaven or afterlife for broken down computers. That is a fairy story for people afraid of the dark." ~Stephen Hawking
  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
Dynaco Mark III Kilowatt Tubes / Valves 17 1st February 2013 08:56 PM
Dynaco Mark III Ty_Bower Tubes / Valves 13 20th February 2012 08:44 PM
Triode Electronics Mark III SA-12 Tubes / Valves 6 6th May 2009 05:28 PM
For Sale: Shiva Mark III cak Swap Meet 8 10th March 2003 08:43 PM


New To Site? Need Help?

All times are GMT. The time now is 10:58 AM.


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