Duncans PSU designer and tube 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 3rd March 2004, 04:40 AM   #1
diyAudio Member
 
Join Date: Aug 2003
Location: Indiana USA
Talking Duncans PSU designer and tube rectifier.

Hello,
I have received a bunch of Hammond 167L80 transformers. It gives 2 amp at 80V CT.
I am simulating a suitable tube rectifiler by Duncans Desinger2...
Since the iron's big power, I have problem in finding suitable tubes. The sofeware give waring to most of the rectifiers.... except 5U4XX,5VXX
I am looking for tubes endurable of high current. I mean is there any best choice for low voltage,but high current rectifying? I find it that after doubling the voltage, those $5 iron are really convienient for everything! Except applying any choke to the circuit.


Thanks for looking...

C.C.
  Reply With Quote
Old 3rd March 2004, 06:12 AM   #2
arnoldc is offline arnoldc  Philippines
diyAudio Member
 
Join Date: Apr 2003
Location: Makati
Send a message via Yahoo to arnoldc
hi,

may we know what load you are looking at?

?? volts @ ?? mA

cheers
  Reply With Quote
Old 3rd March 2004, 07:32 AM   #3
SHiFTY is offline SHiFTY  New Zealand
diyAudio Member
 
SHiFTY's Avatar
 
Join Date: Jul 2002
Location: New Zealand
5U4 and 5V4 are very good rectifiers, I like 5V4 because of the slow warm up.

What is the current of your circuit? the tube database at duncanamps.com gives a good idea of current capacity.

You could always just use a silicon diode bridge (4x 1N5408) they have good current capacity.
  Reply With Quote
Old 3rd March 2004, 07:34 AM   #4
diyAudio Member
 
Frank Berry's Avatar
 
Join Date: Sep 2003
Location: Midland, Michigan
I believe a 5AR4 has a lower voltage drop and can handle a bit higher current.
__________________
Frank
  Reply With Quote
Old 3rd March 2004, 09:16 AM   #5
diyAudio Member
 
Brian Clark's Avatar
 
Join Date: Nov 2003
Location: Ongar, Essex
Or consider using a pair of TV damper diodes - e.g. 6CJ3 - maybe?

You would need two 6.3V windings though

Brian.
  Reply With Quote
Old 4th March 2004, 04:00 AM   #6
diyAudio Member
 
Join Date: Aug 2003
Location: Indiana USA
Wah!
quote ""may we know what load you are looking at?

?? volts @ ?? mA""

The load is only around 200V (80V X 2 = 197V for tubed voltage multiple) and a few mAs. Yeah... I know 2A is over kill, but the transformer is only $5 each....

Using 5XXXX is kind of overkilling in sence of designed handling voltage, so I am asking. I've checked the tube datasheets. They are of high current and high voltage types. I have bunch of EZ81, but they are too little for the game.

So much priceless suggestion! Thanks for all!

  Reply With Quote
Old 4th March 2004, 04:19 AM   #7
diyAudio Member
 
Join Date: Jan 2003
Location: Sweden
Quote:
The load is only around 200V (80V X 2 = 197V for tubed voltage multiple) and a few mAs.
Quote:
I have bunch of EZ81, but they are too little for the game.
Something is strange here, you say the load is only a few mAs but an EZ81 is too small? for a few mAs you can use almost any tube rectifier, a EZ81 should be OK as well as many other tubes, remember that it is the load that determines the max current trough the rectifier not what the transformer can give.

If you have problems with exceeding peak current it probably depends on that your input cap is too big, most tube rectifiers can only handle ~47uF max, reduce the cap or connect a series resistor before the cap to reduce the peak current.

Can you post your components values?

Regards Hans
  Reply With Quote
Old 18th March 2004, 12:47 PM   #8
s2kov is offline s2kov  Canada
diyAudio Member
 
s2kov's Avatar
 
Join Date: Mar 2004
Location: AB
Guys,

Sorry for my ignorance. What do you basically looking for using Duncan's PSU Design?
  Reply With Quote
Old 18th March 2004, 01:00 PM   #9
diyAudio Moderator Emeritus
 
Bas Horneman's Avatar
 
Join Date: Apr 2002
Location: The Netherlands
Blog Entries: 18
Quote:
Sorry for my ignorance. What do you basically looking for using Duncan's PSU Design?
A good indication of the voltage and ripple i will get for parts i want to use and for the current draw of my circuit.
  Reply With Quote
Old 18th March 2004, 01:16 PM   #10
s2kov is offline s2kov  Canada
diyAudio Member
 
s2kov's Avatar
 
Join Date: Mar 2004
Location: AB
For the results you will get, what interests you most that will apply to the circuit?


Quote:
Originally posted by Bas Horneman


A good indication of the voltage and ripple i will get for parts i want to use and for the current draw of my circuit.
  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
4v for rectifier tube camotecue Tubes / Valves 10 20th May 2008 09:20 PM
Tube rectifier help Cobra2 Tubes / Valves 12 3rd March 2007 01:58 PM
tube rectifier bonsai171 Tubes / Valves 37 12th March 2005 07:07 PM
Anybody heard about Tarzian Silicon Rectifier for Tube Rectifier Replacement? zxx123 Tubes / Valves 4 21st February 2005 04:02 AM
Tube rectifier for VDIGC tube psu ebijma Chip Amps 2 11th March 2004 04:02 PM


New To Site? Need Help?

All times are GMT. The time now is 09:11 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