SET recommendations - Page 2 - 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 16th November 2006, 11:19 PM   #11
diyAudio Member
 
Join Date: Oct 2004
Location: Adelaide South Oz
ALF,
I see you are in Melbourne. Give Hugh Dean (AKSA) a call. He and a fellow in Mt Gambier have developed a Parafeed KT88 SET Amp. He can probably help with a schematic and local parts sources.
Cheers,
Ian (in South OZ)

Else there is this thread
SE KT88 Amp
  Reply With Quote
Old 16th November 2006, 11:29 PM   #12
Sherman is offline Sherman  United States
diyAudio Member
 
Join Date: Feb 2004
Location: Chicago area
Quote:
Originally posted by Bas Horneman
... And either 2 filament supplies or a filament supply that switches in the right voltage dropping resistor. Then ofcourse a seperate cathode resistor for the 300B and the KT88. The rest stays the same.

... The 300B needs more drive than a KT88. So when in 300B mode you won't be able to get the full power...but who cares. One could use that for certain types of music or late night listening. And switch in the KT88 for parties.

Maybe use a 12.6V filament trafo and switch between separate voltage regulators to supply either the 5V or 6.3V depending on the tube being used at the moment.

I'm sure that someone could sit down and draw a schematic to allow full output with either tube but without switching things in the driver stage you'll only optimize for one or the other.

A KT88 can be driven with 32-33V swing, more than double (IIRC) that for the 300B. Maybe set up to drive the 300B to full output and use less of the volume control for the KT88? Or as BAS says, you won't get full output from the 300B if the driver is optimized for the KT88.
__________________
--Sherman
  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
Sub recommendations Please jaybird Subwoofers 8 17th December 2003 06:55 PM
op amp recommendations millwood Solid State 18 29th April 2003 12:49 PM


New To Site? Need Help?

All times are GMT. The time now is 08:00 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