Left Border Content - RF Cafe
Windfreak Technologies
Res-Net Microwave - RF Cafe
 

About RF Cafe

Kirt Blattenberger - RF Cafe Webmaster

Copyright: 1996 - 2024
Webmaster:
    Kirt Blattenberger,

    BSEE - KB3UON

RF Cafe began life in 1996 as "RF Tools" in an AOL screen name web space totaling 2 MB. Its primary purpose was to provide me with ready access to commonly needed formulas and reference material while performing my work as an RF system and circuit design engineer. The World Wide Web (Internet) was largely an unknown entity at the time and bandwidth was a scarce commodity. Dial-up modems blazed along at 14.4 kbps while typing up your telephone line, and a nice lady's voice announced "You've Got Mail" when a new message arrived...

All trademarks, copyrights, patents, and other rights of ownership to images and text used on the RF Cafe website are hereby acknowledged.

My Hobby Website:

AirplanesAndRockets.com

Header Region - RF Cafe
Electronics World articles Popular Electronics articles QST articles Radio & TV News articles Radio-Craft articles Radio-Electronics articles Short Wave Craft articles Wireless World articles Google Search of RF Cafe website Sitemap Electronics Equations Mathematics Equations Equations physics Manufacturers & distributors Engineer Jobs LinkedIn Crosswords Engineering Humor Kirt's Cogitations RF Engineering Quizzes Notable Quotes App Notes Calculators Education Engineering magazine articles Engineering software Engineering smorgasbord RF Cafe Archives RF Cascade Workbook 2018 RF Symbols for Visio - Word Advertising RF Cafe Homepage Thank you for visiting RF Cafe!
Sub-Header - RF Cafe Anatech Electronics

Soldering Tip - RF Cafe Forums

The original RF Cafe Forums were shut down in late 2012 due to maintenance issues - primarily having to spend time purging garbage posts from the board. At some point I might start the RF Cafe Forums again if the phpBB software gets better at filtering spam. Note: The RF Cafe Forums were reconstituted in April 2021!

Below are the old forum threads, including responses to the original posts.

-- Amateur Radio
-- Anecdotes, Gripes & Humor
-- Antennas
-- CAE, CAD, & Software
-- Circuits & Components
-- Employment & Interviews
-- Miscellany
-- Swap Shop
-- Systems
-- Test & Measurement
-- Webmaster

Kirt Blattenberger
 Post subject: Soldering Tip
Posted: Tue Mar 16, 2010 11:27 pm 
 
Site Admin
User avatar

Joined: Sun Aug 03, 2003 2:02 pm
Posts: 451
Location: Erie, PA
Greetings:

This afternoon I was doing some soldering of copper plumbing (moving the washing machine connections in the basement) and ran into an unexpected situation where the propane torch was not able to deliver enough heat because of the large amount of copper fittings in the immediate area. I was using the standard Pb-Free plumbing solder (SnSb5), which has a melting temperature of around 235 °C.

It just wasn't going to work. I pulled out the MAPP/Oxygen torch, but alas the Ox bottle was empty. What to do?

Well, fortunately I have a good stash of the good old 60/40 PbSn solder, which has a melting temperature of around 188 °C. That's 45 degrees lower - pretty significant.

It worked. The solder flowed readily into the joints using the propane torch, and as a bonus, the comforting signature shiny finish resulted. Lead-free solders are dull when cool... the way we used to know to spot a cold solder joint. Since the downstream flow goes only to a washing machine, I am not concerned about the lead content (not that I would be anyway, since the 1950s vintage house is filled with it).

So, this is a good reminder for anyone else facing a similar situation whether with a plumbing project or with an electrical/electronic project that is difficult or impossible to solder due to not being able to transfer enough heat.

_________________
- Kirt Blattenberger :smt024
RF Cafe Progenitor & Webmaster




Posted  11/12/2012
Footer - RF Cafe Anatech Electronics
Right Border Content - RF Cafe
Werbel Microwave - RF Cafe
LOTUS Communications Systems Modular RF Component Building Blocks - RF Cafe
 

Please Support RF Cafe by purchasing my  ridiculously low−priced products, all of which I created.

These Are Available for Free