开云体育

-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Ray Burke
Sent: Friday, July 27, 2018 10:11 AM
To: [email protected]
Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire

The Radio Shack Desoldering bulb is useless because you cant get the tips any more, no more Radio Shack. I have used the Radio Shack Desoldering bulb, (have one). Solder Wick, Solder Suckers and other tools, while they are cheap, they do cause damage to the circuit boards with pulled pads, through holes, and other problems, ( I have used them and damaged my boards). Don't use any of the cheap alternatives, if you want to save the circuit boards. Use at least a good Desoldering gun or station. Use at least a Hakko FR-301 which I just bought, or a better Hakko Desoldering station, there are others that are more expensive like Pace, Metcal, which I used at work. I just used it to repair my wifes monitor that died with no power, and opened it up and found about three bulging capacitors, replaced all eight on the power supply, and fixed it. After getting the caps at Fry's it only took me about 20 minutes to change all eight, love my new Desoldering gun, NO PULLED PADS. One other thing is manufacture support, Hakko is the best. I got a desoldering station from my work, which they didn't want any more and Hakko had the tips for the thing. Now you could get some cheap Chinese knockoff but support may not be their in a few years, or at all. Buy at least a Hakko and you won't be disappointed. The other main desoldering companies are more expensive. You could check out the tear apart videos of the www.EEVBlog with Dave Jones.

On Thursday, July 26, 2018 11:36 PM, Michael A. Terrell <mike.terrell@...> wrote:


I started working in a TV shop at 13, in 1965. One older tech was a fountain of practical knowledge. I wasn't old enough to open an account at the local parts house, so he would buy things for me so Ii didn't have to go through our boss and pay his markup. He bought me my first desoldering iron which was a professional version of that Radio Shack version. It was made by Endevco, and it was almost $40 which was a lot for a kid making a buck an hour after school. He was also the one who got me started on Ersin Multicore solder. I've never regretted paying a little extra for good solder, because there was very little waste.

We handed the resale of a wave solder machine for Lockheed Martin around 1990, along with other process equipment after they shut down a production line in one of the Orlando plants.

Microdyne was still using the same grade of paste solder they tarted with, even though the SMD parts were a lot smaller than the first they used. I had to fight with Manufacturing engineering to buy a type with smaller solder balls and a RMA flux. The fine pitch ICs (IE: MC68340) came out of the early ovens with unmelted solder balls under the ICs, and the 0402 passives were tombstoning. They had spent a wad on that Heller oven, but the quality hadn't changed. Once we had better solder, we could refine the reflow profiles. That eliminated over 95% of the reflow problems within a few months, as they continued to refine the profiles.

Did you build much equipment for your Amateur radio hobby? I went a different route, into broadcasting. Not many hams ever got to pump out 5MW EIRP of RF from a 1700 foot tower. :)

Michael A. Terrell


-----Original Message-----

From: Chuck Harris <cfharris@...>
Sent: Jul 26, 2018 11:59 PM
To: [email protected]
Subject: Re: Wow Radio Shack desoldering Iron Best review ever, Re: [TekScopes] 466-464 stray wire

I have minimal experience with industrial soldering machines. I
was a kid back in 1970, and a ham, and getting a job working for
DEI was like being let loose in a candy shop. I did a ton of
odd jobs after the child labor bureau made me stop doing all of
their silver and gold plating. I was a sponge, and soaked up every
process or technique I was exposed to. Which was a lot. I did
etching, plating, drilling, KPR, soldering, helped set up the
one-off machines that made standoffs and rivets... moved safes,
carried trash, pushed a broom... but I digress.

Nobody that I am aware of was using reflow ovens back in 1970.
Everything I saw was either through-hole, or was simple stuff
that was hand soldered on one of the teflon based pcb materials.

But I can only talk to what DEI, Nems-Clarke, and Vitro were did,
and also what a PCB manufacture/build/assemble house I worked at
later was doing.

I just did a search, and the only 80/20 alloy I could find was a
Pb80/Sn20, which has a solidus temperature of 183C and a liquidus
temperature of 280C. That is as compared to 63/37 which is 183C.

Pb80/Sn20 would be wonderful for operations where you needed to
sculpt the solder, like a car fender, or the terminals on very high
voltage circuitry. It would also be useful for soldering terminals
that might be later soldered with 63/37, such as the internal connections
on a modular mixer.

-Chuck Harris