Search found 258 matches

by brassmedic
Wed Apr 01, 2020 8:28 pm
Forum: Maintenance
Topic: Submerging whole rotor section in water
Replies: 17
Views: 403

Re: Submerging whole rotor section in water

harrisonreed wrote:
Wed Apr 01, 2020 7:15 pm
Begin to seat the plate with your fingers, and then use a pvc pipe end cap and a rubber or rawhide mallet to seat it completely.
The cap from a bottle of valve oil will work too, if you don't happen to have PVC lying around.
by brassmedic
Wed Apr 01, 2020 8:23 pm
Forum: Maintenance
Topic: Submerging whole rotor section in water
Replies: 17
Views: 403

Re: Submerging whole rotor section in water

Dennis wrote:
Wed Apr 01, 2020 3:51 pm
Brad,

Please tell me that isn't a Greenhoe that was done so wrong.
O.K., I won't tell you. :biggrin:
by brassmedic
Wed Apr 01, 2020 1:25 pm
Forum: Maintenance
Topic: First Trigger Mechanism
Replies: 8
Views: 120

Re: First Trigger Mechanism

The bearing cap was put on in the wrong position, so the witness marks don't mean anything. The notch at the bottom of the bearing cap should line up with the notch in the valve casing. (Although it's possible that's being distorted by the camera angle - hard to tell.)
by brassmedic
Wed Apr 01, 2020 1:52 am
Forum: Maintenance
Topic: Submerging whole rotor section in water
Replies: 17
Views: 403

Re: Submerging whole rotor section in water

Don't worry. That's an old picture. Long before someone decided they needed to eat bat soup. The takeaway from this should be you HAVE to take the valve apart to clean it properly. Period.
by brassmedic
Tue Mar 31, 2020 7:15 pm
Forum: Maintenance
Topic: Submerging whole rotor section in water
Replies: 17
Views: 403

Re: Submerging whole rotor section in water

This is a photo of the inside of a valve where the user cleaned it exclusively while assembled and never took it apart. I trust my point is made.
20190716_213616.jpg
20190716_213616.jpg (2.86 MiB) Viewed 349 times
by brassmedic
Tue Mar 31, 2020 2:26 pm
Forum: Tangents
Topic: Chris Stearn (AKA Blast) OK?
Replies: 34
Views: 1225

Re: Chris Stearn (AKA Blast) OK?

I quit because I had better things to do with my time than argue and not the time or inclination to post at the length that would have rendered my comments impervious to misinterpretation.... so I quit. Equipment is crucial...you can't play trombone without a trombone... but, as I recently posted e...
by brassmedic
Mon Mar 30, 2020 4:48 pm
Forum: Tangents
Topic: Chris Stearn (AKA Blast) OK?
Replies: 34
Views: 1225

Re: Chris Stearn (AKA Blast) OK?

These meta-discussions are always entertaining. I remember that thread, but I didn't realize it had taken a left turn like that. I went back and read it again. I guess I don't see it as some of you apparently do. I got the vibe that it started out as an innocent discussion about equipment that was a...
by brassmedic
Sun Mar 22, 2020 11:47 am
Forum: Instruments
Topic: Tuning slide switch
Replies: 3
Views: 244

Re: Tuning slide switch

Bach isn't very consistent in terms of how components fit from one instrument to another. It's possible the two tuning slides have different dimensions and you're introducing stress when you swap them onto a different instrument where they don't fit correctly.
by brassmedic
Sun Mar 22, 2020 1:40 am
Forum: Instruments
Topic: King 3b f attachment mods
Replies: 15
Views: 682

Re: King 3b f attachment mods

I just want to say to everyone who says, "Can the King lever be more like a Conn?" No, it can't. The King lever goes OVER the brace. The Conn lever goes UNDER the brace. Therefore, they cannot be the same.
by brassmedic
Fri Mar 20, 2020 12:24 pm
Forum: Instruments
Topic: Slide Lock question
Replies: 19
Views: 621

Re: Slide Lock question

All of my trombones are slightly different. My Bach's slide lock is the oddest since it has to be rotated a full turn from being fully screwed in to work. That usually happens because a lazy tech put new felts in the cork barrels without removing the old felts. I frequently find remnants of 2 or 3 ...
by brassmedic
Thu Mar 19, 2020 2:57 pm
Forum: Instruments
Topic: Slide Lock question
Replies: 19
Views: 621

Re: Slide Lock question

Also, this lock info does not apply to those old Getzens with that tiny button screw that you have to take off completely - and promptly lose - before playing. :roll: Huh? Getzen made trombones with slide locks that had to be completely removed from the instrument to play it? All old Getzens I've e...
by brassmedic
Wed Mar 18, 2020 8:49 pm
Forum: Instruments
Topic: Slide Lock question
Replies: 19
Views: 621

Re: Slide Lock question

I like it to be threaded on all the way until it stops, and I consider it to be properly installed if it stops about 1/8" beyond the slide lug. That way there is a positive stopping point when you unlock the slide, and it's much less likely to get out of position while you're playing and causing you...
by brassmedic
Sat Mar 14, 2020 12:09 am
Forum: Modification & Repair
Topic: Please help me, what is going on with my lead pipe conversion
Replies: 15
Views: 977

Re: Please help me, what is going on with my lead pipe conversion

There was actually a little more to the original story... The original upper tube had so much solder from the factory, that it broke off while it was being removed so a new upper tube had to be ordered and replaced (at no cost to me). So that is a brand new pipe. No, it wasn't the amount of solder....
by brassmedic
Sat Mar 07, 2020 9:19 am
Forum: Modification & Repair
Topic: Removing sleeves from 6H slide
Replies: 6
Views: 582

Re: Removing sleeves from 6H slide

Thanks for all the tips. There are lots of options here. I doubt there’s too many factory 6H LW slides floating around in great shape. I’ve seen a couple 5H’s. Lots of 48H’s. Those are built without sleeves I gather. There’s always the CF option for $800. I appreciate all the help on this. Most lik...
by brassmedic
Fri Mar 06, 2020 2:21 am
Forum: Modification & Repair
Topic: Removing sleeves from 6H slide
Replies: 6
Views: 582

Re: Removing sleeves from 6H slide

In my opinion it's kind of tricky, but if you get the right person it should be no problem. Of course you're essentially rebuilding the slide, so probably won't be cheap.
by brassmedic
Thu Mar 05, 2020 9:39 pm
Forum: Modification & Repair
Topic: Fixing loose slide lock
Replies: 14
Views: 778

Re: Fixing loose slide lock

Also would depend on the diameter of the slide lock, of course. This particular repair was for a Bach 42.
by brassmedic
Thu Mar 05, 2020 7:16 pm
Forum: Modification & Repair
Topic: Fixing loose slide lock
Replies: 14
Views: 778

Re: Fixing loose slide lock

Brad, Your home-made tool has really caught my attention. I definitely want to make one. It looks like the walls are pretty thin on the flat surfaces of the nut. That’s probably necessary to give it the “flex” to draw in the slide nut. Do you know the size of the brass nut you started with? That's ...
by brassmedic
Thu Mar 05, 2020 4:53 pm
Forum: Tangents
Topic: Do Certain Sounds Enrage You?
Replies: 9
Views: 609

Re: Do Certain Sounds Enrage You?

I cannot stand the sound of someone cracking his knuckles, and I don't know why it bothers me; it just does. It's not only the sound, though; it's also the fidgety behavior of someone obsessively pushing on each finger over and over to try to find the one that will make that popping sound.
by brassmedic
Thu Mar 05, 2020 3:05 pm
Forum: Maintenance
Topic: Shires rotor valve
Replies: 8
Views: 985

Re: Shires rotor valve

It's just a friction fit. The only difference is Bach/Conn etc. use a flat side on the spindle, while Shires uses a keyway slot. The part you are calling the "silver part" is the stop arm. You shouldn't be able to just pull the stop arm off. If you could on your other horn then it was either worn ou...
by brassmedic
Thu Mar 05, 2020 3:19 am
Forum: Modification & Repair
Topic: Tennis Racquet Grip Tape
Replies: 21
Views: 1601

Re: Tennis Racquet Grip Tape

This is your slide on tape.
20190918_141444.jpg
20190918_141444.jpg (3.54 MiB) Viewed 648 times
by brassmedic
Tue Mar 03, 2020 5:32 pm
Forum: Modification & Repair
Topic: Fixing loose slide lock
Replies: 14
Views: 778

Re: Fixing loose slide lock

FullPedalTrombonist wrote:
Tue Mar 03, 2020 4:59 pm
All I need is a lathe
They are pretty darned handy to have.
by brassmedic
Tue Mar 03, 2020 4:39 pm
Forum: Modification & Repair
Topic: Fixing loose slide lock
Replies: 14
Views: 778

Fixing loose slide lock

Easy and effective way to fix a loose slide lock (the type that threads on). I took a large brass nut and cut a channel inside approximately the outer diameter of the slide lock, than cut a gap in the nut. I can put it in the 3 jaw lathe chuck and tighten it enough to slightly shrink the slide lock....
by brassmedic
Sun Mar 01, 2020 11:45 pm
Forum: Teaching & Learning
Topic: D valve tuning
Replies: 10
Views: 659

Re: D valve tuning

I tune the F below the staff in the same place as tuning Bb, because it's not necessarily exactly the same as the middle F, and you would never need to play middle F with the trigger because it's the same note as the open horn. I also tune low D in the same spot.
by brassmedic
Fri Feb 28, 2020 12:05 am
Forum: Modification & Repair
Topic: Please help me, what is going on with my lead pipe conversion
Replies: 15
Views: 977

Re: Please help me, what is going on with my lead pipe conversion

The Bach 42 with a normal non-threaded receiver has the slide tube expanded at the end in order for the leadpipe to fit inside of it. I don't know if that's the case with a threaded receiver, but perhaps the tech failed to expand the end of the slide tube properly. It does look like there is some sp...
by brassmedic
Thu Feb 27, 2020 6:14 pm
Forum: Instruments
Topic: Innovations in Trombones... (and other brass)
Replies: 52
Views: 3584

Re: Innovations in Trombones... (and other brass)

Jerome Wiss actually uses computer design and 3D printing for prototyping his instruments. While not a trombone, his 6/20 trumpet departs from all previous trumpets by eliminating one of the three ports in each valve and doesn't require manipulation of the third valve slide to get the typical C# an...
by brassmedic
Wed Feb 26, 2020 5:40 pm
Forum: Instruments
Topic: Innovations in Trombones... (and other brass)
Replies: 52
Views: 3584

Re: Innovations in Trombones... (and other brass)

There really isn't much we could exactly call "new". Laser welding, I suppose. The earliest trombones were modular - not soldered together but held together by hinges and clasps. So even that isn't really a new idea.
by brassmedic
Tue Feb 25, 2020 2:51 am
Forum: Modification & Repair
Topic: Crafty Homebrew Solutions
Replies: 8
Views: 537

Re: Crafty Homebrew Solutions

Gary wrote:
Mon Feb 24, 2020 9:47 pm
"Crafty Homebrew Solutions"? I thought this thread was about beer.
I know, man. So disappointing.
by brassmedic
Thu Feb 20, 2020 2:00 am
Forum: Modification & Repair
Topic: D slide for single rotor
Replies: 14
Views: 723

Re: D slide for single rotor

paulyg wrote:
Thu Feb 20, 2020 12:22 am
A piece in the symphony had all three players glissing from pedal Bb to low D.
That's just bad writing.
by brassmedic
Wed Feb 19, 2020 10:58 pm
Forum: Modification & Repair
Topic: Trumpet tuning slide question for a tech
Replies: 9
Views: 458

Re: Trumpet tuning slide question for a tech

It probably needs a chem clean. The silver colored metal is nickel silver (which actually contains no silver).
by brassmedic
Sun Feb 16, 2020 2:03 am
Forum: Instruments
Topic: What are some horns you will NEVER buy?
Replies: 61
Views: 5687

Re: What are some horns you will NEVER buy?

Ha ha! I play a Bach 42 with a Thayer valve, and I have never played a Rath that I liked.
by brassmedic
Sat Feb 15, 2020 2:15 am
Forum: Modification & Repair
Topic: Just For Copper Glue
Replies: 2
Views: 364

Re: Just For Copper Glue

Looks sketchy to me. YMMV.
by brassmedic
Fri Feb 14, 2020 9:49 pm
Forum: Instruments
Topic: What are some horns you will NEVER buy?
Replies: 61
Views: 5687

Re: What are some horns you will NEVER buy?

Cleveland, Bundy, Olds Ambassador, Pan American, any Czech trombone, any trombone made in India.
by brassmedic
Thu Feb 13, 2020 12:12 pm
Forum: Instruments
Topic: In defense of Yamaha
Replies: 70
Views: 4354

Re: In defense of Yamaha

harrisonreed wrote:
Thu Feb 13, 2020 12:48 am
Yamaha had an innovative wrap style with multiple tuning slides. One you left tuned, the other was for E pull. The king wrap also does this.

Yamaha wishfully called it a semi-open wrap or some such.
But if you leave one slide tuned, the second slide doesn't get you all the way to E.
by brassmedic
Thu Feb 13, 2020 2:09 am
Forum: Instruments
Topic: In defense of Yamaha
Replies: 70
Views: 4354

Re: In defense of Yamaha

harrisonreed wrote:
Thu Feb 13, 2020 12:48 am
Yamaha had an innovative wrap style with multiple tuning slides. One you left tuned, the other was for E pull. The king wrap also does this.

Yamaha wishfully called it a semi-open wrap or some such.
Do you really get an E pull with that short loop, though?
by brassmedic
Thu Feb 13, 2020 12:37 am
Forum: Instruments
Topic: In defense of Yamaha
Replies: 70
Views: 4354

Re: In defense of Yamaha

Beyond that, all of the F attachment wraps which are not 'open' for Yamahas are "semi-closed", a design feature that was copied on some clones of Yamaha instruments (e.g. the older Jupiter 636 models). The closest similarity that predates Yamaha having this wrap is the King closed wrap models and o...
by brassmedic
Mon Feb 10, 2020 11:01 pm
Forum: Instruments
Topic: In defense of Yamaha
Replies: 70
Views: 4354

Re: In defense of Yamaha

Interesting discussion. I agree that Yamaha does not need defending. Their quality control is probably better than Conn-Selmer, and yes the finish seems to always be excellent. They are well-built instruments. Also, to the "build quality" portion... Yamaha seems to use a very soft yellow brass on th...
by brassmedic
Sun Feb 09, 2020 4:31 pm
Forum: Modification & Repair
Topic: How to shorten the movement of the triggers / levers on the Thayer Valves?
Replies: 2
Views: 421

Re: How to shorten the movement of the triggers / levers on the Thayer Valves?

One way is to have a tech cut out a section of the part of the lever that's forward of the hinge, then braze the rod back together. The shorter rod will have a shorter throw. Or straighten out the 90 degree bend where the thumb paddle is and re-bend it further up. It's possible that could put too mu...
by brassmedic
Wed Feb 05, 2020 9:27 pm
Forum: Modification & Repair
Topic: Review: Brad Close 32H leadpipe in King 3B
Replies: 27
Views: 1441

Re: Review: Brad Close 32H leadpipe in King 3B

FYI, I measured some King leadpipes. A 2B 2-piece leadpipe is .410 venturi, which is the same venturi size as the 1-piece 1938 pipe I copied for the model I make. A 3B 2-piece leadpipe is .380, so MUCH smaller than a 2B pipe. I don't have a 1-piece 3B pipe to measure.
by brassmedic
Sun Feb 02, 2020 2:49 pm
Forum: Modification & Repair
Topic: Review: Brad Close 32H leadpipe in King 3B
Replies: 27
Views: 1441

Re: Review: Brad Close 32H leadpipe in King 3B

If you have a pipe that I made you can certainly send it to me to have a screw ring installed. Trombone makers have used various ways to make pipes fit tightly at the receiver end: 2 piece pipes, changing the mouthpiece insertion depth, proprietary mouthpiece shank sizes, using heavier gage metal. T...
by brassmedic
Fri Jan 31, 2020 6:46 pm
Forum: Modification & Repair
Topic: Review: Brad Close 32H leadpipe in King 3B
Replies: 27
Views: 1441

Re: Review: Brad Close 32H leadpipe in King 3B

Glad you like it! If memory serves, I measured a 3B leadpipe vs. a 2B leadpipe, and the 3B pipe was actually tighter. I don't know if they are trying to compensate for the larger bore by having a smaller leadpipe, but it did seem strange to me how tight the stock pipe is.
by brassmedic
Tue Jan 28, 2020 11:46 pm
Forum: Modification & Repair
Topic: Thayer cores compatibility
Replies: 3
Views: 396

Re: Thayer cores compatibility

You can't. OE Thayer is out of business. The person running the company passed away.
by brassmedic
Tue Jan 28, 2020 7:38 pm
Forum: Modification & Repair
Topic: Relapping/replating Rotors
Replies: 11
Views: 697

Re: Relapping/replating Rotors

The valve needs to seal inside the casing, not at the bearings. If the bearings are loose they should be swaged, but that won't fix a worn out valve that's leaking. The valve core has to be heavily copper plated so that it is very slightly larger in diameter than the casing, then lapped into the cas...
by brassmedic
Tue Jan 28, 2020 2:21 pm
Forum: Performance
Topic: Mouthpiece change - splitting notes!
Replies: 15
Views: 956

Re: Mouthpiece change - splitting notes!

Wow, thanks to you all! I fully appreciate that going back to the 5G would probably do the trick, but having tried the 4V (tried a few MP's of the same dimensions at the shop) I love the fact that I can get a much better sound in the lower range and actually play most of the bass trombone stuff I'm...
by brassmedic
Mon Jan 27, 2020 10:07 pm
Forum: Performance
Topic: Mouthpiece change - splitting notes!
Replies: 15
Views: 956

Re: Mouthpiece change - splitting notes!

Suggesting that you go back to your old mouthpiece, one which you're not having problems with, is as constructive a suggestion as a person can make. If you like the other mouthpiece then play on it but if it's not improving your sound why would you stick with it? Sometimes the best answers are the ...
by brassmedic
Mon Jan 27, 2020 1:54 pm
Forum: Performance
Topic: Mouthpiece change - splitting notes!
Replies: 15
Views: 956

Re: Mouthpiece change - splitting notes!

A man goes to the doctor. He says, "Doc, it hurts when I do this." The doctor says, "Then stop doing that."

Go back to the 5G.
by brassmedic
Sun Jan 19, 2020 10:12 pm
Forum: Maintenance
Topic: Something I didn't know about rotary valves
Replies: 7
Views: 748

Re: Something I didn't know about rotary valves

Yes, the outer bearing. All three are like that. I'm guessing they didn't have the precision to do an interference fit like on a trombone, and set up this tapered bearing seat instead. I should post some photos of some of the crude fit and finish on this thing. Yeah, let's see a photo. I would assu...
by brassmedic
Sun Jan 19, 2020 4:30 pm
Forum: Maintenance
Topic: Something I didn't know about rotary valves
Replies: 7
Views: 748

Re: Something I didn't know about rotary valves

If you are talking about this part of the valve, it should require a rawhide mallet tapped on the opposite end of the spindle to pop it out. If it is loose fitting and can be pulled off with your fingers, then it needs to be repaired. If it's that loose, the bearing is probably moving around when th...
by brassmedic
Sun Jan 19, 2020 1:19 pm
Forum: Maintenance
Topic: Something I didn't know about rotary valves
Replies: 7
Views: 748

Re: Something I didn't know about rotary valves

I have an old and crudely made Russian rotary valve trumpet. It's more of a wall hanger than a player. For no particularly good reason I decided to lube linkages and slides last night. These valves have a lot of pivots in the linkages. Probably 6 each. If I tapped out the valves like on the trombon...
by brassmedic
Sun Jan 19, 2020 2:10 am
Forum: Modification & Repair
Topic: Outer slide tubes not parallel
Replies: 26
Views: 1463

Re: Outer slide tubes not parallel

Yes, you can bend the crook to make it almost any width. However, any bending that makes the ends of the crook not parallel will likely introduce some type of problem or stress into the slide. There are tricks like creating a little more play in the ferrules before soldering it, but any trick is so...

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