Sn/Pb S-Sn/Cu ... - Page 2 - 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 17th January 2011, 11:39 AM   #11
Doz is offline Doz  United Kingdom
diyAudio Member
 
Doz's Avatar
 
Join Date: Jul 2010
Location: Sat Down
Quote:
Originally Posted by Soonerorlater View Post
I included non-rohs leaded multicore solder in my last order from Farnell ( about 6months ago) and had no trouble getting it.

I believe the nuclear power industry has a special dispensation to continue to use leaded solder on circuit boards as it has a proven 50 year+ track record of reliability. Lead free solder has a few years to go to equal that.

While demand remains for leaded solder, manufacturers I'm sure will supply.
Medical Industry too...

I have no problems with the silver stuff, but it must be said, tip life is compromised, possibly due to the higher temp.
  Reply With Quote
Old 17th January 2011, 03:13 PM   #12
diyAudio Member
 
Join Date: Aug 2009
Location: Sacramento
Quote:
Originally Posted by Bandersnatch View Post
hey-Hey!!!,
I've found the most critical thing to be flux. I like the Kester 44 rosin and it happens to smell good too...
cheers,
Douglas
Hello,
I agree flux can be key, the more active (acid) it is the better it works. Be sure to wash the flux off when you use Kester 44, it continues to work for years.
DT
All just for fun!
  Reply With Quote
Old 17th January 2011, 04:36 PM   #13
diyAudio Member
 
Michael Koster's Avatar
 
Join Date: Jan 2008
Location: Eureka, CA
Quote:
Originally Posted by M Gregg View Post

Just for interest,
If you look at how much solder you use in a project and the length of what you have used it is quite a lot in the conduction path!
It is in every connection.

Regards
M. Gregg
What is the distance (gap) between the two conductors in one of your solder joints? What is the "conductor length" of lead in each joint, between say a wire and a terminal it is wrapped or crimped around? What is the alloy composition of the finished joint between the conductors?

What's bad about lead bearing solder and Hifi?

PS I would not use acid flux in electronics because any residue at all will cause corrosion around the edges of the solder joint and, this from personal experience, will eat through stranded wire right at the edge of the solderblob in short order.

PPS Cardas QE (what's the OEM brand of that stuff?) is easily my favorite solder of all time.

Last edited by Michael Koster; 17th January 2011 at 04:44 PM.
  Reply With Quote
Old 17th January 2011, 04:42 PM   #14
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
"Pb free" is the requirement of Recyclonomics era, when everything is manufactured to be recycled. In the gear that is made to work forever it is not necessary. I spoke with people on AES who build optical compressors (cadmium salt, prohibited by ROHS as well as Bb), and they said, they require from customers to send the gear back for recycling, if they decide so.
__________________
The Devil is not so terrible as his math model!
  Reply With Quote
Old 17th January 2011, 04:46 PM   #15
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by Michael Koster View Post
PS I would not use acid flux in electronics because any residue at all will cause corrosion around the edges of the solder joint and, this from personal experience, will eat through stranded wire right at the edge of the solderblob in short order.
Also, if the gear will work in tropics, even a plain organic pine rosin have to be carefully washed out: some microorganisms may find a home in your nice microphone preamp eating nice smelling flux and leaving aggressive excrements.
__________________
The Devil is not so terrible as his math model!
  Reply With Quote
Old 17th January 2011, 05:21 PM   #16
diyAudio Member
 
Join Date: Jun 2008
Well, then there's this issue. Nasa thinks enough of the subject to have a whole web-page on it.
  Reply With Quote
Old 17th January 2011, 05:54 PM   #17
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Quote:
Originally Posted by Hearinspace View Post
Well, then there's this issue. Nasa thinks enough of the subject to have a whole web-page on it.
Thank you, good links. But for consumer market it is considered as a positive outcome: it keeps upgrades running. For example, in 2009 only in U.S.A. we had 2,000 Ton of e-waste, mostly cellphones and computer components. Such Pb-free production cleans market for new and new production. A hamster of Recyclonomics keeps running and spinning the wheel of progress!
__________________
The Devil is not so terrible as his math model!
  Reply With Quote
Old 17th January 2011, 07:09 PM   #18
M Gregg is offline M Gregg  United Kingdom
diyAudio Member
 
M Gregg's Avatar
 
Join Date: Jun 2010
Location: UK
Quote:
Originally Posted by Michael Koster View Post
What is the distance (gap) between the two conductors in one of your solder joints? What is the "conductor length" of lead in each joint, between say a wire and a terminal it is wrapped or crimped around? What is the alloy composition of the finished joint between the conductors?.
-----------------------------------------
The joint should be metal to metal contact, the solder is just a glue.(Or should I say it should be)

Have you ever been sad enough to create a set of interconnects with "multicore" solder? Or created interconnects with nickle? Just for fun of course
-----------------------------------------
What's bad about lead bearing solder and Hifi?
-----------------------------------------
I used to use "multicore" solder all the time. I am not a fan of it now.

I am not against "lead" period! I think if it helps in small quantities then fine. Cardas is very good even excellent solder "wetting" is excellent.

I think its the alloy that is important not so much the large amounts of lead.
-----------------------------------------------
PS I would not use acid flux in electronics because any residue at all will cause corrosion around the edges of the solder joint and, this from personal experience, will eat through stranded wire right at the edge of the solderblob in short order.
----------------------------------------
I have seen many PCB fail due to flux residue. It should be cleaned off. Interesting I have seen in industry the IC plated with tin as shown in the NASA post. It seems to be worse in some environments than others. It looks like someone has rubbed a pencil across the legs of the chip. Hard to get off as well! Also ultrasonic cleaning and coating did not stop it, only slowed it down about a week!
-----------------------------------
PPS Cardas QE (what's the OEM brand of that stuff?) is easily my favorite solder of all time.
------------------------------------

One final comment: "I am not a tree hugger", yes I have a classic car. I asked some one once what they thought of unleaded conversions, I was not a fan at the time. He said," I think if we can do something to help the environment then we should. (He was not selling conversions").

Then again if you like the sound of electrons and lead solder its been standard for years.

If it is so good then why are capacitors not made of lead foil and oil for high end ? Could it be that it dosen't sound very good?


Regards
M. Gregg
__________________
What is the sound of one hand clapping?

Last edited by M Gregg; 17th January 2011 at 07:17 PM.
  Reply With Quote
Old 17th January 2011, 08:41 PM   #19
diyAudio Member
 
Wavebourn's Avatar
 
Join Date: Sep 2006
Location: Pleasant Hill, CA
Send a message via Skype™ to Wavebourn
Small amount of led" sounds to me like "small amount of feedback". Actually, 60/40 is selected for 240 degrees C of melting point: lower than melting points of components.

Here is some useful information:

Electronics Tips: Soldering Techniques

Speaking of why capacitors are not made from lead, it is because it has higher resistance than aluminium. They are made from copper that has lower resistance. But lead acid capacitors, certainly, are made from lead.
__________________
The Devil is not so terrible as his math model!

Last edited by Wavebourn; 17th January 2011 at 08:44 PM.
  Reply With Quote
Old 18th January 2011, 12:00 AM   #20
diyAudio Member
 
Join Date: Aug 2009
Location: Sacramento
Hello,
Lead has something to do with plumbing so I will use a plumbing analogy.
The original water saver toilet was a 3.5 gallon flush, and then it was 1.6 gallon now the new California Green Code puts it at 1.28 gallons per flush. The first 3.5ís did not flush worth a crap. The 1.6ís are now working better. The point is that it takes the industry some time to get the lead out and for things to work.
Heat sensitive parts like the lower melting point of 60/40 or of a true eutectic solder (lowest Pb/Sn alloy melting point) 63/37. It is not that 63/37 has better electrical properties.
Plumbers liked 50/50 solder because it had a putty range, it starts to melt around 360 F and is not fully liquid until near 420 F. Get it sort of hot and push it around like hot glue. It fills up voids, does not run out and does not leak.
One more piece of trivia; before Bondo they used body lead, actually 90/10 solder that had a wide putty range. They could push it around with a trowel. Just like butter with a knife.
I know a guy that cast so many lead bullets that he is now shooting blanks (really).
DT
All just for fun!
  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
All quiet on the SN front - about darned time! cbutterworth Tubes / Valves 12 1st December 2007 03:53 PM
Wanted: P-Audio SN-8MB speakers NED 209 Swap Meet 0 30th April 2007 11:56 PM
convert Lead Pb-206 to Pb-205 jacquesl Everything Else 2 4th February 2007 10:39 AM
All quiet on the SN front - recommended choice of tubes cbutterworth Tubes / Valves 4 29th January 2007 10:40 PM
Pb / Pb-free DragonMaster Everything Else 29 11th January 2006 11:48 AM


New To Site? Need Help?

All times are GMT. The time now is 01:38 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