Author Topic: Fazio Electric  (Read 4472 times)

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Offline strawberryTopic starter

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Re: Fazio Electric
« Reply #25 on: December 29, 2021, 04:35:54 pm »
soldering station cranked up to 450C
 

Offline mansaxel

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Re: Fazio Electric
« Reply #26 on: December 29, 2021, 05:54:24 pm »
soldering station cranked up to 450C

If you know what you are doing and are fast, that's going to go just fine. If you're going to linger on delicate components, not so much.  There is a bit of personal taste to this, and there's no doubt that the designated temperature is going to be the safe bet, but skilled people can bend the rules pretty much and still produce similar results. Especially in things like point-to-point wiring.

Online Shock

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Re: Fazio Electric
« Reply #27 on: December 29, 2021, 06:32:20 pm »
It's only a small tip, she probably has to crank it when desoldering wires from the chassis. Towards the end of the video it looks lower anyway.
Soldering/Rework: Pace ADS200, Pace MBT350
Multimeters: Fluke 189, 87V, 117, 112   >>> WANTED STUFF <<<
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Offline strawberryTopic starter

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Re: Fazio Electric
« Reply #28 on: December 29, 2021, 11:11:02 pm »
solder gets dull and flux is evaporating at first touch.
faster soldering iron wearout
if component lead knot not want to giveup then crank up temperature, it is some psychological emotional stuff I dont believe
better suck solder off then untangle using sharp pliers
 

Offline floobydust

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Re: Fazio Electric
« Reply #29 on: December 30, 2021, 01:53:11 am »
I looked and her soldering style/technique is to be quick, she's fast. So the iron needs to be quite hot for that, with large through-hole parts.
I've found that works fine, contact time is brief, but it does oxidize the tip faster and wreck (melt/overheat) things if you ever need to stay on the joint for more than a few seconds.
Everyone has their own style. I teach noob engineers to use a lower iron temp and simply wait a couple seconds for the joint to melt. Some of them have no patience though.

You can always do something better, find faults in others. I don't see how criticizing the repair video is constructive  :-//

 
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Offline vk6zgo

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Re: Fazio Electric
« Reply #30 on: December 30, 2021, 02:16:29 am »
Despite some procedural no-nos here and there,

Example?
Sure. In one of her last videos (or perhaps the last), she was repairing an amp sitting upright with all vaccuum tubes fitted. Easily disastrous scenario if the amp topples and breaks them.

Also, in the same video she was soldering/desoldering parts on the sockets with the vacuum tubes fitted - the thermal stress of rapidly heating/cooling the socket pins is also propagated to the tube pins, which can create small leaks in the metal/glass junction and reduce the lifespan of the tube. This was a common alert on all the vacuum tube manuals I ever read.

If so, it was the most neglected alert in the real world----nobody had the time to pull all the tubes when equipment was needed "yesterday"!
The thermal stress upon the pins using modern irons is also minimal compared to that from the irons we used back in the day.
Quote

There are other minor things such as shotgun replacement of capacitors, etc. but these are more or less justified depending on the conditions.

Experience, along with urgency of return to service  is usually the arbiter of whether such actions are necessary.
 

Offline rsjsouza

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Re: Fazio Electric
« Reply #31 on: December 30, 2021, 12:10:58 pm »
Surely these aspects would be much less relevant back then when professional repair was mainstream and vacuum tubes could be found anywhere, but you can't deny they will save you from big headaches especially in today's day and age. Also, the videos give the opposite impression of a "production line repair" - they are quite detailed and caring instead, thus the five seconds per tube removed is rarely an impediment.

I did a few non-professional repairs back in the 1980s and, apart from the manuals I had read, these were also rules backed by the experience of some of the TV technicians I knew and read about at the time - some of the vacuum tubes were already expensive back then (not the PL36s and PY88s, but especially the big PL509s or PY500s of the big 26'' TVs) and minimizing these risks was already wise.

Overall, as I said before, the videos are entertaining and useful and nobody (including me) is perfect but we all have to be open-minded to improve, even if we have been doing this for 40, 50 years.
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Oh, the "whys" of the datasheets... The information is there not to be an axiomatic truth, but instead each speck of data must be slowly inhaled while carefully performing a deep search inside oneself to find the true metaphysical sense...
 


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