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 13th December 2012, 08:17 AM   #101
diyAudio Member
 
Vincent77's Avatar
 
Join Date: Jan 2011
Location: Bruxelles
I usually combine PCB with P2P: stuff like CCS, relatively complex PSUs, fixed bias, power management, etc., go on small PCB modules. I put ventilation holes under any resistor or heatsink that dissipates more than 0.5W.

Tube sockets and big caps go on chassis or on a sub-chassis, if I want to hide the nuts and bolts...
  Reply With Quote
Old 15th December 2012, 05:21 AM   #102
freax is offline freax  Australia
diyAudio Member
 
freax's Avatar
 
Join Date: Sep 2007
Location: NSW
you guys might be interested in this book: Symposium on Solder: Presented at the Fifty-ninth Annual Meeting American ... - American Society for Testing Materials - Google Books

specifically pages 115 and beyond and pages 113 and prior.
__________________
  Reply With Quote
Old 15th December 2012, 08:23 AM   #103
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
A 1957 book has little revelance today (apart from some of the joining techniques), if you want to keep up with what is happening with PCBs and electronics assembly I would suggest joining or getting hold of IPC documantation, standards and research or having a look at PCD&F.
The materials and assembly techniques have improved greatly over the years, and today most electronic production is carried out using lead free solder.
If you are realy serious about the quality of your electrical/electronic assemblys the look at IPC-610 and 610 training, this is the most widely used standard in the world for quality of workmanship and joint quality.
Its a nice book from a historical point of view though.

http://pcdandf.com/cms/
http://www.pcb007.com/pages/pcb007.cgi

Last edited by marce; 15th December 2012 at 08:27 AM.
  Reply With Quote
Old 15th December 2012, 08:35 AM   #104
freax is offline freax  Australia
diyAudio Member
 
freax's Avatar
 
Join Date: Sep 2007
Location: NSW
pfft sif, That book covers a whole lot more than just pcb's, but yeah if your not interested in bundles or old solder techniques...
__________________

Last edited by freax; 15th December 2012 at 08:39 AM.
  Reply With Quote
Old 15th December 2012, 08:54 AM   #105
Banned
 
Join Date: Oct 2012
Its pretty subjective and and a multitude of opinions everyone has between the two, but nothing wrong at all with experimenting with both and find out what suits you and if you like it or not.
  Reply With Quote
Old 15th December 2012, 08:58 AM   #106
Banned
 
Join Date: Oct 2012
You are right though PCB construction has been getting better as far better quality copper and thicker boards, yet in the past lots manufactures have really skimped on both of those.
  Reply With Quote
Old 15th December 2012, 09:27 AM   #107
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
They still do skimp on things, for commercial gear, quite often (all the time!) cost is paramount, look at the electronic kit we can buy these days for peanuts! There is also the high reliability, medical, aerospace, military and bespoke elctronics where quality is paramount. One of the equating factors though is SMD, compared to through hole, SMD assembly is cheep in manual labour costs, setting up a line is quite expensive but once set up you can produce thousand of boards 24/7.
Point to point is perfect for one offs and development for analogue and low speed basic digital. High speed digital prototypes require a PCB though as the development has to take in any effects PCB parasitics are goiung to have on the signal. So both have their place, but PCB's do have the advantage for EMC in todays RF rich envoironment, you can engineer EMC solutions into the layout (Henry Ott's tome is the best guide there is on this). And I believe that that is becoming more critical, especialy if you are worried about any influence on sound quality EMC may have.
Personaly I find point to point a PITA, just the hassle of doing it, so I will do myself a PCB, i also have the security of knowing the PCB connectivity matches the shematic exactly.
  Reply With Quote
Old 15th December 2012, 09:34 AM   #108
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
Freax, IPC-610 and other documents cover the same things, it is an interesting book, but with the advances in materials technology and construction techniques, I believe more modern material would be more relevant for todays assmbly methods, though having looked through it, and as I stated, some of the jointing techniques, forming a strong mechanical bond etc are still relevant.
Pfft, rather an onomatopoeic reply for 1st thing on a Saturday
  Reply With Quote
Old 15th December 2012, 09:37 AM   #109
freax is offline freax  Australia
diyAudio Member
 
freax's Avatar
 
Join Date: Sep 2007
Location: NSW
Oh thats okay, its 9:39pm on Saturday here so its okay.

point to point terminal strip helps with the headache of working on ptp wiring, which is really just pcb!!!

I just thought of something...
Click the image to open in full size.
__________________

Last edited by freax; 15th December 2012 at 10:03 AM.
  Reply With Quote
Old 15th December 2012, 02:57 PM   #110
marce is online now marce  United Kingdom
diyAudio Member
 
Join Date: Jun 2007
Location: Blackburn, Lancs
LOL
One big advantage of PCB's (though not as relevant for tube designs) is miniturisation, a couple of op-amps and related discretes, next to a 0.1" DIL package...HDI PCB (high density interconnect) design, 0.1mm laser drilled vias.
Attached Images
File Type: png SMD_extreme.png (33.3 KB, 70 views)
  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
Point 2 Point (no PCB) for TDA7293, TDA7294, TDA7295, TDA7296. danielwritesbac Chip Amps 149 10th July 2013 08:18 PM
LM3386: point to point or PCB? tbj Chip Amps 21 6th November 2012 01:21 PM
F5 Point to Point Power Supply Schematic bassnkeys Pass Labs 15 22nd February 2012 04:32 AM
Anyone use magnet wire for point to point wiring projects? Hybrid fourdoor Parts 10 2nd February 2004 08:11 AM
Point to point or use a PCB jarthel Tubes / Valves 13 10th June 2003 09:15 PM


New To Site? Need Help?

All times are GMT. The time now is 03:55 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