Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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

Quicksilver 6550A's?
Quicksilver 6550A's?
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
Thread Tools Search this Thread
Old 28th January 2004, 06:48 PM   #11
lpd is offline lpd  Canada
diyAudio Member
Join Date: Nov 2003
Location: BC
I'm not sure what the b+ in the KT88 monoblocks is, but I'm assuming its about 450-475 margin. I'll pull out the vm tonight and check the voltages.
  Reply With Quote
Old 28th January 2004, 08:05 PM   #12
richwalters is offline richwalters
diyAudio Member
richwalters's Avatar
Join Date: Sep 2003
Location: Schwartzwald
Okay at the bench- with my switchable B+ homemade amp. I'm running at 485V B+ using parallel P-P UL 2,25K A-A with 6550B's, just squeezing 135W per ch. Tubes reasonably well matched give excellent AB1 performance. I find 6550's give lowest THD at app 65mA/quies/ tube.
Another interesting situation occurs at reduced B+ of 250V using same circuit but 95mA quies /tube. At reduced Pout of 25W, Anode current =100mA per tube n'st damm it class A.
THD in both power cases well below 0.1% at 1dB below clip with 20dB fb..

enclosed excel graph..I hope this comes through.....my machine isn't the best to use..for attachments....

  Reply With Quote


Quicksilver 6550A's?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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
6550a question for engineer? KJ2005 Tubes / Valves 59 24th November 2009 03:33 PM
Quicksilver lpd Tubes / Valves 10 9th March 2009 02:55 AM
Quicksilver? lpd Tubes / Valves 20 2nd January 2004 01:17 AM
quicksilver 8417 hum dreaded 42 Tubes / Valves 4 11th September 2003 02:45 AM
Quicksilver 8417 dreaded 42 Tubes / Valves 4 4th September 2003 11:14 PM

New To Site? Need Help?

All times are GMT. The time now is 03:02 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio