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

How to run RH807 at 400V?
How to run RH807 at 400V?
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 23rd April 2011, 09:31 PM   #1
carbondated is offline carbondated  United Kingdom
diyAudio Member
 
Join Date: Jan 2011
Default How to run RH807 at 400V?

So I've decided to try out the RH807 as my second build, after the success of the RH84. It's almost the same circuit but with differently-rated components, and the choice of 807s, KT66, or 6V6 as output tube. Suggested voltage is 320-0-320 to produce a B+ of 350V. The author suggests it can be run with higher voltages, but with appropriate modifications... which he doesn't specify.

I'd like to run this with a 6L6 at around 400V, but (1) I have a Lundahl with 250, 48, and 250 windings. My first inclination is to use the 250+250 and drop this (high-wattage resistor voltage divider? but would that be detrimental to the sound?) somehow -- any suggestions? And (2) how much bigger would the choke have to be? Kitic adds just one more 10H/50mA to the RH84 power supply, but I suppose would be prudent to add another choke and capacitor (CLCLC) - say 20H/80mA and 200uF on each rail (or do I really have to split the two B+ rails?).

Here's the schematic:Click the image to open in full size.
  Reply With Quote

Reply


How to run RH807 at 400V?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
Rh807 Andrewbee Tubes / Valves 23 14th September 2014 12:40 PM
RH807 push pull ? Jaap Tubes / Valves 11 23rd November 2010 10:05 PM
rh807 choke question? tim614 Tubes / Valves 2 23rd September 2009 12:04 AM
RH807 CCS loaded aardvarkash10 Tubes / Valves 8 4th April 2009 07:24 PM
Any RH807 builders? Klimon Tubes / Valves 6 1st June 2007 07:14 AM


New To Site? Need Help?

All times are GMT. The time now is 09:26 AM.


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
Wiki