PSUD modelling of a filament supply - Page 7 - 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 23rd August 2003, 04:19 AM   #61
diyAudio Member
 
Join Date: Sep 2002
Location: Oregon, USA
OK, I now have most of the parts for the filament supplies. Still waiting on the transformers and I need to pick up some of the resistors and pots, but I can assemble most of the circuit now.

I have a question about PCBs/prototyping boards. The local Radio Shack didn't have any "peg boards", so I bought a pair of boards that have solder traces on them. I've used these before, and the traces lift if you keep an iron on them for 2 seconds (i.e. they're really flimsy and annoying), so I don't think I should trust them with 2.5A of current, right? I was planning on using them as peg-boards, i.e. use hookup wire for component-to-component connections and use the board just to mount stuff, no currents flowing through the board's traces.

Does anyone see any issues with that? Or is that an unsafe plan, and I should go get real peg-board, or proto boards capable of handling the currents that will be going through them? Or anything else? For others who have built high-current circuits with discrete diodes and regulators (i.e., lots of chips), how have you mounted them?

Thanks,
Saurav
  Reply With Quote
Old 23rd August 2003, 08:13 AM   #62
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
If you are lifting traces it is because your iron is too hot. Either you have a temperature controlled iron set too high, or you have a crude iron that belongs in the bin before it destroys any more parts.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 23rd August 2003, 04:48 PM   #63
diyAudio Member
 
Join Date: Sep 2002
Location: Oregon, USA
Well, that was back when I was using my cheap Radio Shack iron. I now have a Hakko temp-controlled iron. It's set to 750F, and that's what I've been using it at. Is that too high? Maybe it's OK for resistors and capacitors, but I should lower it when working with the diodes and regulators?

And do you think a proto-PCB will be able to handle 2.5A through its traces? Here's the part: http://www.radioshack.com/product.as...5Fid=276%2D170
  Reply With Quote
Old 23rd August 2003, 05:40 PM   #64
EC8010 is offline EC8010  United Kingdom
diyAudio Moderator Emeritus
 
EC8010's Avatar
 
Join Date: Jan 2003
Location: Near London. UK
Default El hacko!

Gosh, yes, 750F (400C) is too hot, 315C (600F) is more suitable. Love the name of the iron!

2.5A is probably too much for a PCB trace unless it is very wide. Others can probably give better guidance.
__________________
The loudspeaker: The only commercial Hi-Fi item where a disproportionate part of the budget isn't spent on the box. And the one where it would make a difference...
  Reply With Quote
Old 23rd August 2003, 06:19 PM   #65
diyAudio Member
 
Join Date: Sep 2002
Location: Oregon, USA
Thanks. These traces are certainly not wide. The boards look like they were meant to build 555 timer blinking light circuits on.
  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
K-502 Filament supply (or K-12M) jmillerdoc Tubes / Valves 6 18th November 2009 01:59 AM
Modelling stereo PSU in PSUD ... lordvader Tubes / Valves 1 29th September 2008 06:58 PM
Modelling a DC filament supply in PSU Designer II G Tubes / Valves 3 7th February 2008 11:59 AM
Parallel vs. series filament supply - or another filament idea engels Tubes / Valves 11 13th May 2007 02:06 PM
When using a DC filament supply on a DHT... Saurav Tubes / Valves 31 18th September 2003 06:03 AM


New To Site? Need Help?

All times are GMT. The time now is 06:43 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