Go Back   Home > Forums > >

Kanged switching power supply for a tube amp.
Kanged switching power supply for a tube amp.
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
Old 8th April 2021, 11:22 PM   #121
kodabmx is offline kodabmx  Canada
Spreading triode love.
diyAudio Member
 
kodabmx's Avatar
 
Join Date: Oct 2011
Location: Toronto
Kanged switching power supply for a tube amp.
As long as it has some balls on 12V, you're good
__________________
I offer circuit boards, kits, and complete systems for DIY vacuum tube audio.
  Reply With Quote
Old 9th April 2021, 05:41 AM   #122
Alashikata is offline Alashikata  United States
diyAudio Member
 
Join Date: Nov 2012
500W Inverter:
Have you tested other combination to see what other V beside the list as 160 220 and 380. Wonder if can get 280 or 300 on this module.
  Reply With Quote
Old 9th April 2021, 04:18 PM   #123
kodabmx is offline kodabmx  Canada
Spreading triode love.
diyAudio Member
 
kodabmx's Avatar
 
Join Date: Oct 2011
Location: Toronto
Kanged switching power supply for a tube amp.
160 into a Delon will give you 320, you can wire the 18V output in series with the 160 to either boost or buck.
__________________
I offer circuit boards, kits, and complete systems for DIY vacuum tube audio.
  Reply With Quote
Old 9th April 2021, 07:31 PM   #124
Alashikata is offline Alashikata  United States
diyAudio Member
 
Join Date: Nov 2012
Great, I will get 2 boards 280 & 320 to test out.
  Reply With Quote
Old 10th April 2021, 11:48 PM   #125
Alashikata is offline Alashikata  United States
diyAudio Member
 
Join Date: Nov 2012
Have anyone ever thought of PS from satellite box? It should have enough to power to run this project. I have seen people give them away on Craigslist everyday I haven't checked others old home audio equipment yet but I believe they all standard design with 12v, 5v, and 3.3v.

Seem like all wires that has the same voltage connect to the same terminals so you only need to hook up 1 wire for the voltage need and whatever the current of the device need, it will draw enough to run until it runs out the current.

Here is my test on old satellite box PS, 12v and 5v are perfect for the tubes filament where it can run without fan. It would be great to use the satellite case as well since all the RCA and PS jack holes in the back are setup.
Attached Images
File Type: jpg IMG_9810_800.jpg (190.3 KB, 133 views)
File Type: jpg IMG_9812_800.jpg (93.5 KB, 135 views)
  Reply With Quote
Old 16th June 2021, 10:27 PM   #126
craftyjam is offline craftyjam
diyAudio Member
 
Join Date: Mar 2021
Location: USA
Wow thank you for all of this info Kodabmx!

Just to be crystal clear, should the 12v ground be connected to the ht ground and the chassis? I currently have only the ht and 12v grounds isolated and im getting significant hum.
  Reply With Quote
Old 22nd June 2021, 03:36 PM   #127
kodabmx is offline kodabmx  Canada
Spreading triode love.
diyAudio Member
 
kodabmx's Avatar
 
Join Date: Oct 2011
Location: Toronto
Kanged switching power supply for a tube amp.
You're welcome.
I tie the grounds together even to signal and chassis most of the time.
__________________
I offer circuit boards, kits, and complete systems for DIY vacuum tube audio.
  Reply With Quote
Old 26th June 2021, 04:10 AM   #128
craftyjam is offline craftyjam
diyAudio Member
 
Join Date: Mar 2021
Location: USA
Hello, one more question for ya:

How do you keep the hum from the 150W inverter from coupling to the amplifier stage? I'm heavily filtering every section of the power supply and using ample grid stoppers as RC filters, but the faint high pitch hum of the inverte remains. Is physically isolating them in seperate chasis necesary?
  Reply With Quote
Old 26th June 2021, 03:09 PM   #129
kodabmx is offline kodabmx  Canada
Spreading triode love.
diyAudio Member
 
kodabmx's Avatar
 
Join Date: Oct 2011
Location: Toronto
Kanged switching power supply for a tube amp.
I've not encountered that issue with the 150W supply. Perhaps a small common mode choke on the output would help? They are supposed to switch at 37kHz (if you got the one I think you're talking about) so you shouldn't hear it even if it was leaking through. There is an AC output version that switches at 20kHz.

If you look up how to use the SG3525 chip, you can modify the frequency if you need to.
__________________
I offer circuit boards, kits, and complete systems for DIY vacuum tube audio.
  Reply With Quote
Old 5th July 2021, 11:24 PM   #130
craftyjam is offline craftyjam
diyAudio Member
 
Join Date: Mar 2021
Location: USA
I figured out that if you install a snubber in the empty spot in front of the mosfet switchers the ringing will be minimized.

Thanks for the great idea, it works perfect now!
  Reply With Quote

Reply


Kanged switching power supply for a tube amp.Hide this!Advertise here!
Thread Tools

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
Switching Mode Power Supply For Tube Amplifier siliconray Siliconray Online Electronics Store 19 10th December 2020 10:05 PM
Reasonable ripple value for the tube amp switching power supply noyan Power Supplies 2 24th January 2020 12:49 PM
High power adjustable switching power supply (SMPS) 3-60V 40A Richiewillmott Power Supplies 12 1st December 2019 01:47 PM
Switching power supply for tube filaments possible??? noyan Tubes / Valves 59 20th November 2017 08:35 PM
Switching power supply for tube-pre JasonLee Tubes / Valves 12 20th March 2007 12:26 AM


New To Site? Need Help?

All times are GMT. The time now is 01:03 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki