Re: [neonixie-l] Re: does anyone know the trick to pre tin the leads on mtx-90 tubes

Sun, 30 Apr 2023 14:00:26 -0700

Interesting. Maybe time to break the flux out? Works for me on old radios.

On Apr 29, 2023, at 12:37 PM, Batareyka <[email protected]> wrote:


mth-90 used solder with a high lead content. Therefore, for a long time of non-use, the balls on the legs of the solder oxidize and form a rather large film of oxide that prevents the metal itself from melting.
To do this, you need to remove the plaque to a shiny with anything, a file or a knife.
And after that, everything is soldered quite easily.
суббота, 29 апреля 2023 г. в 19:31:58 UTC+3, Jasper nagle:
 Maybe I have another go at the blobs tomorrow on a few different tubes I’ll see if age makes a difference 

On Sun, 30 Apr 2023 at 12:23 am, Yohan Park <[email protected]> wrote:
Just tried with my iron set to the highest temperature (480C/896F), added lead based solder to try to make it going but nothing happened.
So either you're soldering at insanely high temperatures or they've used different materials over the years... :)

On Saturday, April 29, 2023 at 2:01:11 PM UTC+2 Jasper nagle wrote:
I was able to melt the blobs on the mtx-90 with a soldering iron so it must be something like tin or lead 

On Sat, 29 Apr 2023 at 7:56 pm, Yohan Park <[email protected]> wrote:
No that's not true. It's not solder but a different metal (can't recall what it is) to make it easy to solder. You won't be able to melt the blobs with your soldering iron though.

On Friday, March 24, 2023 at 1:10:31 PM UTC+1 Paul Andrews wrote:
I had read that the little balls on the ends of the leads are solder. Is that not true?

On Friday, March 24, 2023 at 7:17:05 AM UTC-4 Jasper nagle wrote:
thanks for that

On Fri, Mar 24, 2023 at 7:01 PM Batareyka <[email protected]> wrote:
H3PO4
or
H3PO4 + HCl (10:1)

пятница, 24 марта 2023 г. в 12:33:31 UTC+2, Jasper nagle:
tubes im having no luck putting tin to them i even managed to tin the painted surface i was working on in the process 

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