school repairs strategy/mindset
Posted: Wed Apr 10, 2024 11:34 am
I can't remember the philosophical expression, but it has to do with
[A] doing considerable good for MANY
~ vs ~
doing extraordinary good for FEW
Repairs fall into those two categories, and (I believe) a successful repair person can employ one or the other - depending on the situation.
Obviously, there's a considerable benefit to being able to do GOOD work VERY fast, as (re: [A]) stuff will end up with MORE good done to it than otherwise.
Typical (sadly: really messed up) mellophones typically end up with...
- frozen main slides (LOL...of course, the one that actually matters just a little bit)
- twisted-sideways valve sections
- un-soldered and epically yanked-sideways mouthpipes (with some red-rot, defining extreme caution when repairing their epic damage)
- full of lime
- noisy/compressed piston felts
- other stuff (ridiculous bell flare and bow dents, solder joints, and you-name-it)
I can't help wondering whether this stuff - for which we (back in the 60's/70's) would have received multiple chart-on-the-wall demerits, possibly a paddling, a bad conduct grade on our report card, a low letter grade as well, and we-or-our-parents being required to have the instrument repaired - is brought forth mostly via substance abuse, quack behavioral prescription medicines, anger issues, lack of mechanical experience (with dads - if present - not knowing how to do things other than computer stuff and channel-changing), or what...
...but (though I can't help but wonder) none of that is any of my business.
My business (with school instruments) is to do as MUCH good for as MANY instruments for the AVAILABLE funds.
Here's a mellophone.
It had EVERYTHING on the list wrong (thankfully, no case repairs...)
To SPEED UP repairs, and keep costs down...
- Rather than un-soldering the typically-stuck main slide and carefully removing each leg (delicate braces, etc.) I "back-fed" some PB Blaster, heated the far ends of each of the tubes for about ten seconds with a low-flame torch, and carefully tapped out the slide.
- It was chemically cleaned, but I didn't go back and "pretty up" or "lap in" the slides and pistons. (Thankfully, the pistons are stainless steel - and not monel) so they cleaned up really well without having to go back over them by hand.)
- The valve section was untwisted cautiously by hand (no loosened solder joints, no "rebuilding").
- Knowing that there is pressure put on the lower portion of the #1 casing (when untwisting a mellophone valve section), I was completely ready (and did) burnish the lower portion of the #1 casing - once untwisted.
- The mouthpipe was wrecked. I LEFT IT ON THE INSTRUMENT. I quickly (to avoid burning lacquer) removed the receiver brace - to give me room to bend the mouthpipe back straight. PRIOR TO the major correctional bend, I repaired the mouthpipe's MINOR correctional bends FIRST - so the big bend would just about be the last bending to be done on it. (Per usual, there is some red-rot forming in the mouthpipe (why yellow brass chosen by the manufacturer with a mouthpipe tube this thin...??) Being that it was both bent and beginning to rot, I was extremely careful. The valve brace was partially loose and (predictably) popped off...and didn't break...so whatever. I cabled a couple of dent balls through the worst dents and previous worst bends...and then (as the mouthpipes are so very thin, these days) I was actually able to use a c. .440" dent ball and (after cabling removed those dents by about 85%) MAGNET BURNISHED those worst dents out "good enough". The two braces (intentionally-removed receiver brace and the valve brace - which I pretty much knew would pop loose) were reattached. The water key nipple was mushed in as well, so I coaxed it back up gingerly/cautiously with (not a dent ball, as - again - these jobs need to be FAST) but a slide expander - first placed under the front edge of the nipple, and then under the back edge. I replaced the "cork"...no leaks .
- With the valve section formerly twisted, I had to go back with calipers (+ eyeballs for coplanar) and re-align all the slides. They're now "good" and the #1 thumb saddle one now slippy-slides as it should (no oil/grease...and only used a slide expander under where a brace dented an outside slide tube)...so all slides slide easily, and none of the pistons stick (even when pushed sideways from all directions, and tested "dry")
- Finally, were the "for show" dents (bell flare/large body bow, etc.).
This total gig took an hour (which was a bit disappointing, but I do tend to be overly-optimistic regarding how long stuff will take).
This time (with their destroyed pile of instruments), the director said that he really wanted them fixed "good".
I looked through these instruments' serial numbers, and none of them are any of the same ones that were torn up last time.
I'm thinking "charging more" probably convinces people that I'm doing really good work for them, yes?
SUMMARY/MAIN POINT
I COULD HAVE ordered (and waited how long - ?? - for) a new mouthpipe, but I believe that the TAXPAYERS would MUCH prefer that I let the children tear THIS ONE up once or twice more BEFORE they're asked to buy/install that part. I COULD have prettied up the slide surfaces (and not just chemically cleaned them) but they slide nice. I COULD have done a few more niceties, but (as everything is GOOD) I'm currently drinking my lunch coffee, eating two slices of bologna, and getting ready to call the mellophones DONE, and moving on to the twisted up marching baritones.
[A] doing considerable good for MANY
~ vs ~
doing extraordinary good for FEW
Repairs fall into those two categories, and (I believe) a successful repair person can employ one or the other - depending on the situation.
Obviously, there's a considerable benefit to being able to do GOOD work VERY fast, as (re: [A]) stuff will end up with MORE good done to it than otherwise.
Typical (sadly: really messed up) mellophones typically end up with...
- frozen main slides (LOL...of course, the one that actually matters just a little bit)
- twisted-sideways valve sections
- un-soldered and epically yanked-sideways mouthpipes (with some red-rot, defining extreme caution when repairing their epic damage)
- full of lime
- noisy/compressed piston felts
- other stuff (ridiculous bell flare and bow dents, solder joints, and you-name-it)
I can't help wondering whether this stuff - for which we (back in the 60's/70's) would have received multiple chart-on-the-wall demerits, possibly a paddling, a bad conduct grade on our report card, a low letter grade as well, and we-or-our-parents being required to have the instrument repaired - is brought forth mostly via substance abuse, quack behavioral prescription medicines, anger issues, lack of mechanical experience (with dads - if present - not knowing how to do things other than computer stuff and channel-changing), or what...
...but (though I can't help but wonder) none of that is any of my business.
My business (with school instruments) is to do as MUCH good for as MANY instruments for the AVAILABLE funds.
Here's a mellophone.
It had EVERYTHING on the list wrong (thankfully, no case repairs...)
To SPEED UP repairs, and keep costs down...
- Rather than un-soldering the typically-stuck main slide and carefully removing each leg (delicate braces, etc.) I "back-fed" some PB Blaster, heated the far ends of each of the tubes for about ten seconds with a low-flame torch, and carefully tapped out the slide.
- It was chemically cleaned, but I didn't go back and "pretty up" or "lap in" the slides and pistons. (Thankfully, the pistons are stainless steel - and not monel) so they cleaned up really well without having to go back over them by hand.)
- The valve section was untwisted cautiously by hand (no loosened solder joints, no "rebuilding").
- Knowing that there is pressure put on the lower portion of the #1 casing (when untwisting a mellophone valve section), I was completely ready (and did) burnish the lower portion of the #1 casing - once untwisted.
- The mouthpipe was wrecked. I LEFT IT ON THE INSTRUMENT. I quickly (to avoid burning lacquer) removed the receiver brace - to give me room to bend the mouthpipe back straight. PRIOR TO the major correctional bend, I repaired the mouthpipe's MINOR correctional bends FIRST - so the big bend would just about be the last bending to be done on it. (Per usual, there is some red-rot forming in the mouthpipe (why yellow brass chosen by the manufacturer with a mouthpipe tube this thin...??) Being that it was both bent and beginning to rot, I was extremely careful. The valve brace was partially loose and (predictably) popped off...and didn't break...so whatever. I cabled a couple of dent balls through the worst dents and previous worst bends...and then (as the mouthpipes are so very thin, these days) I was actually able to use a c. .440" dent ball and (after cabling removed those dents by about 85%) MAGNET BURNISHED those worst dents out "good enough". The two braces (intentionally-removed receiver brace and the valve brace - which I pretty much knew would pop loose) were reattached. The water key nipple was mushed in as well, so I coaxed it back up gingerly/cautiously with (not a dent ball, as - again - these jobs need to be FAST) but a slide expander - first placed under the front edge of the nipple, and then under the back edge. I replaced the "cork"...no leaks .
- With the valve section formerly twisted, I had to go back with calipers (+ eyeballs for coplanar) and re-align all the slides. They're now "good" and the #1 thumb saddle one now slippy-slides as it should (no oil/grease...and only used a slide expander under where a brace dented an outside slide tube)...so all slides slide easily, and none of the pistons stick (even when pushed sideways from all directions, and tested "dry")
- Finally, were the "for show" dents (bell flare/large body bow, etc.).
This total gig took an hour (which was a bit disappointing, but I do tend to be overly-optimistic regarding how long stuff will take).
This time (with their destroyed pile of instruments), the director said that he really wanted them fixed "good".
I looked through these instruments' serial numbers, and none of them are any of the same ones that were torn up last time.
I'm thinking "charging more" probably convinces people that I'm doing really good work for them, yes?
SUMMARY/MAIN POINT
I COULD HAVE ordered (and waited how long - ?? - for) a new mouthpipe, but I believe that the TAXPAYERS would MUCH prefer that I let the children tear THIS ONE up once or twice more BEFORE they're asked to buy/install that part. I COULD have prettied up the slide surfaces (and not just chemically cleaned them) but they slide nice. I COULD have done a few more niceties, but (as everything is GOOD) I'm currently drinking my lunch coffee, eating two slices of bologna, and getting ready to call the mellophones DONE, and moving on to the twisted up marching baritones.