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Author Topic:  Zum Changer Question??
Ron Pruter

 

From:
Arizona, USA
Post  Posted 20 Feb 2017 5:18 pm    
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I ran across two things on this Zum that have me stumped. 1) what purpose do these small springs above the helper springs do? 2) The return block that the lower fingers come and rest on have threaded holes behind each string.. Why?? Also, why do only the two E strings have the screws in that block? Thanks. Ron

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Lynn Stafford


From:
Ridgefield, WA USA
Post  Posted 20 Feb 2017 8:19 pm     ZumSteel Changer Question
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Ron,

Bruce used those tiny springs to pull those thin "dummy" spacer fingers that are between each finger against the cabinet to try to transfer tonal vibrations from the changer to the cabinet. I restored an '83 ZumSteel a couple of years ago and it had the same arrangement as yours does. The guitar sounded terrific and I bet yours does too!

The other screws are used for lower compensators (to help with strings that come back a little sharp after being lowered).
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Best regards,
Lynn Stafford

STEEL GUITAR WEST
http://www.steelguitarwest.com
Steel Guitar Technician (Restoration, Set-up, Service and Repair work)

Previous Emmons Authorized Dealer & Service Technician (original factory is now closed)

ZumSteel Authorized Service Technician
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Bill Terry


From:
Bastrop, TX
Post  Posted 21 Feb 2017 5:40 am    
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Hi Lynn, so is that the Zum Hybrid changer?
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Bobby Boggs

 

From:
Upstate SC.
Post  Posted 21 Feb 2017 7:55 am    
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Bill, I'm not Lynn. But no. The Hybrid came to be around 2001. He's much better at explaining things. So when he gets here. The show's all his.Smile

b.
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Lynn Stafford


From:
Ridgefield, WA USA
Post  Posted 21 Feb 2017 9:14 am    
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Hi Bill and Bobby,

Bobby is correct of course, he's a very knowledgeable (and modest) guy.

I also had the same questions about my guitar as Ron has, so I called my friend, Bruce for the answers.

During our conversation, I found out that my guitar was originally owned by Chris "Tiny" Olson! I later called Chris and was told that he used it on several Gene Watson recordings!! The guitar now resides in Texas with one of my customers.

Throughout all the many years of building guitars, Bruce Zumsteg has done a lot of experimenting. He has consistently made improvements in his quest to build one of the very best steel guitars in the world.
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Best regards,
Lynn Stafford

STEEL GUITAR WEST
http://www.steelguitarwest.com
Steel Guitar Technician (Restoration, Set-up, Service and Repair work)

Previous Emmons Authorized Dealer & Service Technician (original factory is now closed)

ZumSteel Authorized Service Technician
----------------------------------
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Bill Terry


From:
Bastrop, TX
Post  Posted 21 Feb 2017 12:44 pm    
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Thanks Lynn and Bobby.. not the hybrid but Interesting nevertheless. I bought Bruce's book at the Texas show last year, and in reading that it's obvious he's a guy that was always looking for a 'better way'.

Great book BTW if anyone hasn't read it. Not sure it's still available?
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Ron Pruter

 

From:
Arizona, USA
Post  Posted 21 Feb 2017 2:45 pm    
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Thanks guys.Lynn, can you explain how that compensator works and how to adjust it? Does it use rubber washers in the contact point? You can pm me if you wish. Ron
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Pete Burak

 

From:
Portland, OR USA
Post  Posted 21 Feb 2017 3:35 pm    
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Ron Pruter wrote:
Thanks guys.Lynn, can you explain how that compensator works and how to adjust it? Does it use rubber washers in the contact point? You can pm me if you wish. Ron


I am hoping Lynn will post the answer here.
I have an '84 S12U that has the same build.
(It's a very sweet sounding Steel)
Was there some original Instructions/Directions for how to adjust those screws, that maybe came with the Steel when ordered new?
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Douglas Schuch


From:
Valencia, Philippines
Post  Posted 21 Feb 2017 3:47 pm    
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Hey Ron,

Here is Chris Ivey's reply to a similar question. He played an '82 Zum.

http://bb.steelguitarforum.com/viewtopic.php?t=243976&highlight=zumsteel

I think there are other threads that have discussed this as well - if I find them, I will post. I never bothered with them.

Doug
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Lynn Stafford


From:
Ridgefield, WA USA
Post  Posted 21 Feb 2017 4:30 pm     Lowering Compensators
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Below is a very good explanation by Danny Letz, taken from Ollin Lander's post.

Danny Letz wrote:
I'm pretty sure those were return compensaters. The 84 I reassembled for a friend of mine had those. In the same bore the allen screw is threaded into, there is a tiny compression spring that contacts the fingers. Back the screw out so that the spring doesn't contact the finger. Now on a string that both raises and lowers, if the string does not return properly to neutral after the raise, try turning the screw in a little at a time until the string does return to neutral properly. The guitar I worked on returned pretty good without the compensaters, so I think we just left them backed off. I don't know how successfully these worked, but I'm pretty sure that's what they are. Split tuning screws would be up above the nylon tuning nuts on the changer. The 84 I reassembled for my friend turned out to be a really good sounding and playing guitar. If it doesn't have split tuning screws, you can still probably do split tuning with the second pull rod method.


During the process of restoring this guitar, I sent the changer back plates in to Bruce to have him drill and tap them for the split tuning screws.
_________________
Best regards,
Lynn Stafford

STEEL GUITAR WEST
http://www.steelguitarwest.com
Steel Guitar Technician (Restoration, Set-up, Service and Repair work)

Previous Emmons Authorized Dealer & Service Technician (original factory is now closed)

ZumSteel Authorized Service Technician
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Danny Letz

 

From:
Old Glory,Texas, USA 79540
Post  Posted 21 Feb 2017 4:48 pm    
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Gosh Lynn, I've never been quoted before. The guitar that I worked on had the spacers that are pulled up against the wood body with the springs for body contact. It is an exceptional sounding guitar and it's owner is playing it in some pretty well known Texas bands. I don't think anyone could talk him out of it.
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Danny Letz

 

From:
Old Glory,Texas, USA 79540
Post  Posted 22 Feb 2017 11:44 am    
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Ron, the allen head capscrew you see under the nylon nuts just pushes on a little compression spring in the other end of it's bore. It just contacts the finger, there are no orings. The reason they're are just two is because they are just on strings that lower and raise. I worked on a Rains not long ago that had the split tuning on the 5th string. I couldn't get it to return properly so I built a compensator with the oring that works like late Zums. I put a brace across the guitar like a lot of guitars have, and anchored the compensator rod to it. It did solve the problem.
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Robert Lashier

 

From:
Arizona, USA
Post  Posted 2 Mar 2017 11:54 am     Zum changer
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Doug,

Wondering if you happen to recognize this guitar? That's right, it's the one you just sold me. Ron is getting her fine tuned for me. Can't wait to get it under my hands. Thanks for a great deal on a great Steel and for being such a gent in the process. Sorry I didn't get this posted on the sales page but it had closed out before I got around to it.
Bob
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Rex Blevins

 

From:
Jenks, Oklahoma USA
Post  Posted 7 Mar 2017 7:18 pm     Emmons SD-10 SKH
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Ron;
Do you still have that SKH SD-10 I sold you ? That was a really nice guitar...
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Ron Pruter

 

From:
Arizona, USA
Post  Posted 7 Mar 2017 8:47 pm    
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Yes Rex,
Still have it. Have put a lot of work into it. Compensators on 4 strings, polished the rollers, made the adjustments for the lower return springs accessible by drilling ten little holes through the end plate. Polished the pedal bar, then added a new decal to it. I also put on a Bill Laurence 705.(couldn't stand the hum) The low B wasn,t dropping with the vertical so I took it apart and found the finger was rubbing on the side of the housing. After a little grinding away with a dremel, it worked great. Still needs a new fret board. I'm starting to grow fond of it. Wish the pedals weren't so crowded. RP
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