On 10/27/2018 09:07 AM, Kellerman wrote:
On 07/10/2018 17:08, Cursitor Doom wrote:
Hi all,

I just fixed up this classic Tek 466 scope I've been meaning to get
around to sorting out for the last few years. As you can see, my
soldering is atrocious. I've been soldering this type of circuitry for 50
years and never got any better at it in all that time. When it comes to
soldering and part-placement, I suck donkey dick!
Check it out and enjoy at my expense:

https://www.flickr.com/photos/128859...in/dateposted-
public/

and...

https://www.flickr.com/photos/128859...in/dateposted-
public/


As you can see, the "world's worst" tag was no exaggeration!



Soldering iron not hot enough, insufficient joint cleaning, use a better
flux - old 60/40 flux cored solder does not contain the correct type of
flux for reworking those old boards.
Chemicals in the PCB material leach out and make soldering difficult.
You need to use one of the modern aggressive types and clean it off
afterwards. I've out of the game too long now and can no longer suggest
which exact type of flux to use.
There are some excellent no-clean types available now too.



Kester 44 solder and MG Chemicals 835 RA flux.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510

http://electrooptical.net
https://hobbs-eo.com