Piggy Rotor Springs

[TubaTodd]

After having my vintage Cerveny piggy worked on, the valves are now fast, but the spring tension on it feels too strong for my liking. I saw the thread about the replacement Yamaha 661 springs. Can anyone recommend a set of softer springs that would work nicely on a Cerveny piggy? My Cerveny 681 I had in the 90's had awesome valves with ideal spring tension. If I can get back to that, I'd be thrilled. Thanks

[IkeH]

A question to you, too, and others who may have older Pigs - does your horn have the curved paddles? Mine does and I tend to slide off at times, and have gotten, thanks to a traveling friend, a set of four Czech coins(copper inside of silver) to have soldered to them, for a fancy flat surface. Anyone else have such a solution or something different?

Ike

[TubaTodd]

Update: I had the tension in the existing springs softened and it made a noticeable difference.

Yes, my paddles are curved. I'm not sure my final verdict on them. They are fine. I may prefer the Miraphone ones more.

[oedipoes]

Rotor springs are not like piston springs.

Any rotor springs that fit reasonably well on an instrument can be infinitely adjusted as to tension. This is particularly true with brand-new springs.

How do you do this in practice?

[sailn2ba]

What IS a safe, progressive way to soften rotary spring action? The 5th valve on my Cerv 686 is is very hard.

[Lee Stofer]

The safe way to adjust rotor spring tension is to have your instrument repair tech do it, provide that they know how. The way I do this involves using two different pairs of pliers, and a very careful unwrapping-re-wrapping process, whereby with patience and persistence the spring tension can be adjusted to just about any desired resistance. Rotor springs very rarely ever need to be replaced.