Full Wave Rectifier - 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 30th June 2008, 08:33 PM   #1
dscrobe is offline dscrobe  United States
diyAudio Member
 
Join Date: Mar 2007
Default Full Wave Rectifier

On page 17 of the RCA, Receiving Tube Manual, RC-30, Copyright 1975, there is a basic schematic of a full wave rectifier. I am stuck on something here. With the way it is drawn, there are two winding on the secondary side of the transformer, the plate winding and the filament winding. Well, it appears that one side of the plate winding happens to be at the same voltage potential as the one side of the filament winding. If the case, how can the tube conduct?
  Reply With Quote
Old 30th June 2008, 08:53 PM   #2
diyAudio Member
 
Join Date: Dec 2006
I'm having a hard time visualizing what you're saying. Can you post a picture or drawing of it?
  Reply With Quote
Old 30th June 2008, 10:09 PM   #3
diyAudio Member
 
Join Date: Dec 2004
Location: Mt Pleasant Sc
Default Full Wave rectifier

Hi:
In looking at the diagram in the RCA Manual the filament is not connected to the plate winding. I do not understand when you say the windings are at the same voltage potential. These windings are seperate and independent of each other.
The two plates of the rectifier tube are connected to the ends of the high voltage winding. The filament is connected to a seperate winding. The voltage output is taken from the cathode of the tube , for the positive and the center tap of the high voltage winding for the negative side. This is labled output to filter in the diagram.
Where did you get the idea the filament was connected to the plate winding?
Read the explanation on pg 17 for how this circuit works and you will get a better idea of what is going on.
Hope this helps
Ed
  Reply With Quote
Old 30th June 2008, 11:00 PM   #4
diyAudio Member
 
Miles Prower's Avatar
 
Join Date: May 2005
Location: USA
Blog Entries: 7
Default Re: Full Wave Rectifier

Quote:
Originally posted by dscrobe
On page 17 of the RCA, Receiving Tube Manual, RC-30, Copyright 1975, there is a basic schematic of a full wave rectifier. I am stuck on something here. With the way it is drawn, there are two winding on the secondary side of the transformer, the plate winding and the filament winding. Well, it appears that one side of the plate winding happens to be at the same voltage potential as the one side of the filament winding. If the case, how can the tube conduct?
Part of the problem is that they show a rather uncommon indirectly heated dual diode there, not the more usual directly heated 5U4s or 5Y3s, and that the schemo uses the archaic style of drawing jump-overs. The two secondaries aren't connected, and the positive DC is taken directly off the common cathode.
__________________
There are no foxes in atheistholes
www.dolphin-hsl.com
  Reply With Quote
Old 1st July 2008, 12:35 PM   #5
dscrobe is offline dscrobe  United States
diyAudio Member
 
Join Date: Mar 2007
Ed,
When I look at the two secondary windings, I am looking at them as if they were one complete winding, however, with a break in between. You could get a voltage reading across the whole imaginary winding. The filament winding would be 6.3 VAC and the plate winding would be about 280VAC. You would add 6.3 VAC to 280VAC to get the sum voltage across both windings of 286.3 VAC, for example. The part where there is a break, I am thinking if you were to take a voltmeter here, you wouldn't read anything. In other words, if I was to take a voltmeter and measure potential from the end of the plate winding (the end that is next to the end of the filament winding) and the end of the filament winding (vice versa), I don't think I would measure anything. That is where I am stuck on learning this.
Dan
  Reply With Quote
Old 1st July 2008, 12:44 PM   #6
dscrobe is offline dscrobe  United States
diyAudio Member
 
Join Date: Mar 2007
Crap, I see the error of my ways here. The output is coming off the cathode. I thought I was seeing the output coming off the heater winding. Need to read schematics a little better. Thanks for feedback.
  Reply With Quote
Old 1st July 2008, 08:35 PM   #7
diyAudio Member
 
Join Date: Dec 2004
Location: Mt Pleasant Sc
Hi:
Glad to help.
Ed
  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
Bridge rectifier vs Full wave rectifier hilbert_mostert Tubes / Valves 4 28th April 2009 09:26 PM
6bBYGA x2 as full-wave rectifier? GordonW Tubes / Valves 2 19th December 2007 06:17 PM
Why two diodes per branch on a full wave rectifier? photo_marc Tubes / Valves 31 27th August 2006 08:32 AM
Full wave vs full wave bridge rectifier jeff mai Parts 31 12th February 2005 12:43 AM


New To Site? Need Help?

All times are GMT. The time now is 12:58 AM.


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