Choke ratings and resistor values in choke input supply? - Page 9 - 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 15th November 2013, 05:54 PM   #81
diyAudio Member
 
Join Date: Aug 2008
Looking at the wiring diagram for the Triad, it appears the two 6.3V winding are completely separate. So, they may be on separate sections of the bobbin? If so, should I put one 6CJ3 on one winding and the other on the other winding, and tie the cathodes to one side of the windings. The side with the dot so the windings are going the same, "direction".

If they are on separate sections of the bobbin, this would help eliminate arcing? Maybe?

Thanks,

Blair
  Reply With Quote
Old 15th November 2013, 11:07 PM   #82
diyAudio Member
 
Join Date: Aug 2008
Here is an image. I have it wired like the bottom of this image. I think I need to wire it like the doctored photo though. Am I correct?

Click the image to open in full size.

Thank you!

Blair
  Reply With Quote
Old 16th November 2013, 02:11 PM   #83
diyAudio Member
 
Join Date: Aug 2008
I rewired this to resembles original
Schematic this morning. I used my variac to power it up and have a fuse. I have no caps in the supply, so all voltages taken are at the output of the first choke.

With peak hold on, I get a high voltage spike of 806V on a cold start which settles to 593V unloaded.

I strapped 235K across it (its what was close in my toy box) to load it a little. I got, with the peak hold on, 794V spike and it settles to 519V.

I added the first cap stage and I get 720V. I know the 235K load is not that hefty at all, but will the 130-150mA idle current being it down ~200V to a suitable B+ for the 6550?

Thank you!

BTW, the 6CJ3 is a pretty tube when lit I like the hefty spiral filament.

Last edited by deicide67; 16th November 2013 at 02:25 PM.
  Reply With Quote
Old 17th November 2013, 03:36 PM   #84
diyAudio Member
 
homeskillet's Avatar
 
Join Date: Mar 2010
Location: Seattle
Blog Entries: 3
I'm glad to see you're still going for it. Now is when it's nice to have a couple or more variable power resistors (the kind with the sliding clamp) and you can see what your regulation is like for the range of current you want to draw. A couple 25 watt, 20k or so would be handy in series/parallel and not too expensive or hard to find. -Fred
  Reply With Quote
Old 17th November 2013, 06:20 PM   #85
diyAudio Member
 
Join Date: Aug 2008
Thanks,

The thing holding me up right now is how I want to mount the caps. Since there are very few resistors in the PS, I'm debating simple cable tie type clamps.

That and what color I want to dye the faceplates

I think blue. It will **** the wife off because it won't match our furniture.
  Reply With Quote
Old 18th November 2013, 02:55 AM   #86
Defiant is offline Defiant  United States
diyAudio Member
 
Defiant's Avatar
 
Join Date: Oct 2011
Location: Somewhere in America
Quote:
Originally Posted by deicide67 View Post
I rewired this to resembles original
Schematic this morning. I used my variac to power it up and have a fuse. I have no caps in the supply, so all voltages taken are at the output of the first choke.
Without capacitors and a minimum load, measurements aren't going to tell you much.
  Reply With Quote
Old 18th November 2013, 03:01 AM   #87
multi is offline multi  Australia
diyAudio Member
 
Join Date: Jan 2011
I made transformer testers: bridge input, voltage doubler, and center tap, using 3k x 2, 200 watt wire wound pots. Can hook up chokes, adjust the voltage using different size caps.
I least i know exactly what voltage I can expect.
Got the big pots from China.
Phil
  Reply With Quote
Old 18th November 2013, 03:13 AM   #88
diyAudio Member
 
Join Date: Aug 2008
Quote:
Originally Posted by Defiant View Post
Without capacitors and a minimum load, measurements aren't going to tell you much.
Right. I was mostly checking to make sure I didn't build a smoke machine
  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
Bleeder Resistor for Choke Input Supply Magz Tubes / Valves 5 19th June 2012 03:30 PM
choke input power supply vitalstates Tubes / Valves 10 24th February 2012 01:03 PM
Choke input power supply, capacitor ratings 00940 Tubes / Valves 14 7th July 2009 05:52 PM
Choke rating for choke input duty cbutterworth Tubes / Valves 14 9th November 2007 04:43 PM
Resistor-Input vs. Choke-Input vs. Cap.Multip. Blitz Pass Labs 13 26th September 2003 04:59 AM


New To Site? Need Help?

All times are GMT. The time now is 11:15 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