Peavey Classic Thirty Cap Job.
- Thread starter dogooder
- Start date
Just being quite direct that you don't know as much as you think.
Just like that idiot in ching chong land that is using black goop not knowing all black pigments are carbon based.
dogooder
Well-known member
? Do a good soldering job and I don't think they will be coming loose?
Too right! I did a lot of work on car radios, early ones were valved and p2p wired but later they used PCBs and they never suffered from vibration related soldering problems. But NO gloop!
I am convinced that the idea of squirting ***t all over PCBs is just a quick and dirty way to hold components in during machine soldering. Who here remembers Mullard's range of "Lokfit" transistors? BC147 and its ilk?
Before gloop only lightweight components were stuffed onto PCBs for wave soldering. Heavy components, big caps, smallish transformers were soldered EXPERTLY by hand. 'S'all to save money. Oh and this involved another labour intensive process. Where the caps etc were to be retro fitted the PCB had to have solder resist tape applied, usually blue you could often see remnants of it on boards.
Dave.
I am convinced that the idea of squirting ***t all over PCBs is just a quick and dirty way to hold components in during machine soldering. Who here remembers Mullard's range of "Lokfit" transistors? BC147 and its ilk?
Before gloop only lightweight components were stuffed onto PCBs for wave soldering. Heavy components, big caps, smallish transformers were soldered EXPERTLY by hand. 'S'all to save money. Oh and this involved another labour intensive process. Where the caps etc were to be retro fitted the PCB had to have solder resist tape applied, usually blue you could often see remnants of it on boards.
Dave.
soldering has nothing to do with it. Its mainly for top heavy parts that break off at the leads. Sometimes when something is assembled in two places, they will glue parts in a sub assembly when shipping it so they don't rattle apart getting to the assembly plant. Like I said before there are several reason why.
dogooder
Well-known member
Believe me when I say those caps in the classic thirty, once soldered in, don't need anything else to hold them, they aren't going anywhere or breaking off.
Nor did the caps or inductors in TVs when PCBs came in, it was only decades later that the black snot arrived...from Japan I think.
Yes, when they (Philips come to mind) started using SMPS transformers on the PCBs they did develop dry joint in quite a short time but that was due to 'magneto-striction' and they had to work to design around that. But snotty gloop would not have helped one bit.
Nobody building any kind of PCB based gear at home would dream of using such a process. Even for a big amplifier that will get bounced around in the band's Transit! We had a 1kW per ch Peavey amp at Blackstar with some HUGE caps in it but NO snot!
Dave.
There has only been a few instances that I will glue a cap in a guitar amp and all those times they brought the amp in because some one changed it a while back and one of the leads broke off of the signal cap they replaced.
dogooder
Well-known member
Must have been weak leads to begin with or operator error and abuse.
The "snap-in" capacitor was developed to stabilize the component during soldering and in service. Some chunkier caps have one to three extra prongs to improve this idea.
I have no doubt that NOT buying in snap ins and instead flooding the board with gloop saves quite few Yen in the long run.
"Bean counters" It is always the fekking bean counters!
Dave.
leads on some parts are flimsy. But the only ones that were really bad were the old point to point guitar amps that the leads would separate from the wax paper cap.