Go Back   Home > Forums > >

Bucking transformer and power switching
Bucking transformer and power switching
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 June 2021, 06:33 PM   #1
jgf is offline jgf  United States
diyAudio Member
 
Join Date: Jan 2010
Location: PA
Default Bucking transformer and power switching

I'm getting ready to build a bucking transformer / amp power switching box. So basically power cord-->fuse-->switch-->6.3V bucking transformer (6A)-->power outlets. There will be 2 outlets at full wall voltage and 2 with approx. 6.3V subtracted. Tube amps (with vintage power transformers) into the bucked voltage outlets, and a solid state bass amp into the wall voltage outlet. The switch will switch all 4 outlets.


My question, is it preferable to switch both hot and neutral or just hot? Location is U.S., (120V AC), most electronic equipment switches hot only, but this is not exactly the same, as the switched power exits the unit.
  Reply With Quote
Old 8th June 2021, 10:52 PM   #2
PRR is offline PRR  United States
diyAudio Member
 
PRR's Avatar
 
Join Date: Jun 2003
Location: Maine USA
Bucking transformer and power switching
US 110VAC wiring is conventionally switched single-pole. It will cost more to find a DP switch rated for arbitrary wall power.

I assume you are going to "use" the amplifiers. If you plan to work on them, a DP switch might be better, but pulling the plug is always best.

Never ever assume you know which is which in US wiring. You can be wrong 60% of the time. It is quite possible to use electricity without knowing white from black.
  Reply With Quote
Old 9th June 2021, 03:45 AM   #3
jgf is offline jgf  United States
diyAudio Member
 
Join Date: Jan 2010
Location: PA
Thanks for replying, PRR. Yes, this is switching for amps in use only, not work. I dug into my parts stash and came up with a double-pole, triple-throw switch (on-off-on), and that's what got me thinking I might want to switch both hot and neutral. I just didn't know if there were any down sides I haven't thought of. I've used a plug in 3 prong outlet tester on the outlets here, all correct. The two 'on' throws of the switch will be useful to select whether the bass amp is powered or not, main amps will be on either way.
  Reply With Quote
Old 9th June 2021, 06:01 PM   #4
jgf is offline jgf  United States
diyAudio Member
 
Join Date: Jan 2010
Location: PA
Update: I tested a couple of power strips, both switch only the hot conductor, so that validates that will be sufficient.
  Reply With Quote
Old 10th June 2021, 01:55 PM   #5
Kay Pirinha is offline Kay Pirinha  Germany
diyAudio Member
 
Kay Pirinha's Avatar
 
Join Date: Oct 2011
Location: Somewhere in Germanistan
I'm not sure if this is a real validation. I know of those US plugs with two vertical blades that can be plugged into the wall outlet by two ways, just like the German Schuko plugs. So, how does one know if the switch interrupts the hot conductor?

I always prefer double pole power switches in my builds.

Best regards!
__________________
"I spent a lot of money on booze, birds and fast cars. The rest I just squandered." (George Best)
  Reply With Quote
Old 10th June 2021, 07:37 PM   #6
jgf is offline jgf  United States
diyAudio Member
 
Join Date: Jan 2010
Location: PA
The amps I will be using with this will all have either 3 prong power cords, or vintage 2 prong non-polarized with a power transformer and no connections to chassis on the primary side. So it will be as safe as plugging into a power strip. I agree though that switching both sides would be better.
  Reply to this post

Reply


Bucking transformer and power switchingHide 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
Novel bucking transformer dooper Tubes / Valves 1 12th May 2020 06:22 PM
Switching regulator for bucking HVDC? kodabmx Power Supplies 10 1st November 2018 07:33 PM
Bucking transformer current load Ggizzy Power Supplies 5 10th October 2015 03:21 PM
Soft Start/bucking transformer For Marantz 9 Monoblocks crooner Tubes / Valves 11 7th March 2015 02:52 AM
Bucking and boosting a tube power transformer boywonder Tubes / Valves 31 11th June 2013 09:36 PM


New To Site? Need Help?

All times are GMT. The time now is 04:53 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 15.79%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.
Copyright ©1999-2021 diyAudio
Wiki