TromboneChat

Hey all, I've got a 70s era 71h that I really enjoy playing, straight stock closet queen, a beauty (minus some of the previous owners high school band scuffs). The one issue I have with it is the lack of a second valve, the way I like to play means that I use both valves often, and was wondering, how viable would it be for me to have a plug-in valve made for it by modifying another tuning slide to do that. I saw a Bach 50 with a similar mod done on brassark a while back with that and haven't been able to shake the idea of doing that with my single valve bass. Do any techs or vintage conn loyalists have any thoughts? The only issue I see is possibly needing to get creative with the wrapping and valve angle because of the stock wrap

A slot in valve on the F slide might be easier.

It would be easier and cheaper to put in a permanent dependent valve next to the F valve. Doing the plug-in kind involves more engineering challenges to overcome. Here's one I did for a 60H. The wrap lends itself well to adding a dependent valve:

brassmedic wrote: ↑Sat Feb 06, 2021 2:06 pm It would be easier and cheaper to put in a permanent dependent valve next to the F valve.

Any thoughts on modifying the wrap to make an independent? I look the look at of the old wrap but I also enjoy indy setups way more

BigBadandBass wrote: ↑Sat Feb 06, 2021 2:24 pm

brassmedic wrote: ↑Sat Feb 06, 2021 2:06 pm It would be easier and cheaper to put in a permanent dependent valve next to the F valve.

Any thoughts on modifying the wrap to make an independent? I look the look at of the old wrap but I also enjoy indy setups way more

Move original wrap up a notch, shorten to G/Gb or keep current length and make a super long thumb trigger.
Add normal 90/90 valve below, make a Benge 290 style F or G/Gb as the other wrap. If G/Gb make a super short ring finger trigger.

I'd say cutting the original a bit would be the best way to do it. Won't stick out stupidly far.

I've done this several times. Pretty straightforward and the valves blow quite well, if not as well as a built in setup.
My 60H has been open wrapped F section with a slot in second valve...see the vintage Conn thread. I have also done slot ins for the standard F valve...you need the tube exits on the valve in the pattern of the standard second valve and a second F valve tuning slide to convert...also another F main tuning slide complete and a bit more tubing with a bend. Yes, it's a bit of work, but nice to have the removable facility.

Chris

Peacemate wrote: ↑Sat Feb 06, 2021 2:32 pm

BigBadandBass wrote: ↑Sat Feb 06, 2021 2:24 pm

Any thoughts on modifying the wrap to make an independent? I look the look at of the old wrap but I also enjoy indy setups way more

Move original wrap up a notch, shorten to G/Gb or keep current length and make a super long thumb trigger.
Add normal 90/90 valve below, make a Benge 290 style F or G/Gb as the other wrap. If G/Gb make a super short ring finger trigger.

I'd say cutting the original a bit would be the best way to do it. Won't stick out stupidly far.

Yeah, the original "open wrap" configuration valve would definitely have to be on top. Maybe have a Minick style S-shaped semi open wrap for the F-section and open wrap for the Gb section. Put wide crooks on both wraps and then the Gb won't stick out so far. Could cut and use a lot of the original tubing but would need to add some parts, I think. Obviously would be more work than dependent because you would have to completely remove and reconfigure the F-section.

Man, those vintage conns are some lookers, maybe once all the 40+ year dents are out of my horn I'll post it in there as well. But that indy minick 60/62H is exactly what I was thinking as a backup. I'd imagine costs comes down to labor, some tube and possibly two new valves?

Sounds like a fun project for someone, before after pics would be great if you can get them

Elow wrote: ↑Sat Feb 06, 2021 4:37 pm Sounds like a fun project for someone, before after pics would be great if you can get them

Oh that's the plan! I've been lurking on some older threads looking at some other mods, the goal is to take this closet queen and get her dressed up for the orchestral ball. Most likely at this point the additional valve and possibly cutting the bell, it's a two piece decently lightweight bell (I think!), but that's another can of worms.

Here's what the bone yard did for me.

Pic

Sorry to revive an old thread, but I have an Abilene 71h that I would love to add a d attachment to. Does anybody have thoughts on a valve or tubing? I have a local shop that is willing to do the work but said I’d have to supply the parts. Is it the same rotor as the f trigger?

This doesn't apply if you like to play independent, but the great advantage of a plug-in is that you end up leaving it out most of the time and playing a lighter horn.

I’m almost hoping to have the second valve because the 71h seems front heavy with that extra long slide. I really wanna add that dependant valve right now to the original one, I’m just not sure where guys are getting the parts. I’m not even sure where I’d find a plug in tuning slide type valve, plus the linkages are super long

Nothing of what you're looking at is available "off the shelf". You will need a good tech, who has done this sort of work before.

hbk73 wrote: ↑Sun Nov 05, 2023 6:43 pm I’m almost hoping to have the second valve because the 71h seems front heavy with that extra long slide. I really wanna add that dependant valve right now to the original one, I’m just not sure where guys are getting the parts. I’m not even sure where I’d find a plug in tuning slide type valve, plus the linkages are super long

If you’re not doing the work yourself, find a tech that doesn’t ask you where to get parts. They should know that part readily.

Cheers,
Andy

Hi, I am looking to add a dependent second valve to my 71h Conn. Any ideas on how much it might cost ish?

I payed 1000 Euro plus tax for the dependant valve on my besson 743