Author Topic: Cannot adjust letoff on 200a  (Read 1202 times)

Offline dantone

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Cannot adjust letoff on 200a
« on: July 11, 2017, 08:17:38 PM »
Hello everybody, and sorry for my English

I have a problem whit setting my letoff cause it apears that the let off "whip" is tripping over before it is even touching the capstan screw where i should set it. It seems that the upper end part of the jack (i think) which is sliding inside the hammer but, is too slippery.

I took the hole action apart on my table, and check if it needed any lubrication or something else to adjust, but the action was very quick and all of the jack springs where in order. I notest thoug, that the jacks ends was extra shiney whith almost as it was spray painted whit really shiney (glossey) black paint. Iv'en so that i didn't put any graffite lead there, as wv shows in theys one videos.

I cannot think anything else than "destroy" the surfice of the jack Head whit some emorypaper so it isnt so slippery, and it whil lift the jack up enougf until i want it to trip.

Thanks for any help.
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Offline pianotuner steveo

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Re: Cannot adjust letoff on 200a
« Reply #1 on: July 12, 2017, 08:17:03 AM »
That does not appear to be the problem. It doesn't matter how "slippery", "shiny" or how quick the Jack is. Something is causing them to trip early, and if raising the letoff capstan away from the Jack does not help, it has to be something else such as key height,dip,whip height,or Reed bar height or a combination of those things. The bottom capstan that actually touches the back of the key may be set incorrectly changes the whip height. The other capstan above that is what adjusts the letoff.

I would experiment with just one key to see what changes, then if you get that to work properly set the others the same way. Be sure to remember what adjustments you are making. Also, be sure that you have the page(s) of the service manual handy. I believe you can look at them on this site.
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 200A EP
1980 Wurlitzer 270 Butterfly Grand
2000 Yamaha acoustic piano
2004 Hammond XK3
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
....and a few guitars...

Offline dantone

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Re: Cannot adjust letoff on 200a
« Reply #2 on: July 21, 2017, 02:52:06 PM »


Hello again.

I've tried now for couple of weeks to find out why the jack is falling too early and havent find anykind of reason why it is doing it. Exept the end of jack is too slippery for the felt. I even put two other wurlis side by side whit this one, and everything seams to be right. I really dont know what else to do.

I took a video of this let off problem, if somebody would see something that i am missing.



https://youtu.be/QuaXZXXsvrc
FenderRhodes 88´ suitcase mark I  -73
Rhodes 73´ stage mark I  -75
Rhodes 73´ stage mark I "another one" -78
Wurlitzer 200. -73
Wurlitzer 200A
Wurlitzer 200B
Wurlitzer 206A
Clavinet D6
Clavinet D6 "another one"
Clavinet D6 "third one"
Clavinet I
Weltmeister Claviset
Yamaha CP-60M

Offline pianotuner steveo

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Re: Cannot adjust letoff on 200a
« Reply #3 on: July 21, 2017, 05:07:54 PM »
I still don't fully understand what the issue is. Are you saying the Jack TRIPS too soon or that it falls back too soon?  Again, being slippery or slick is not part of the problem. Do you have the proper amount of lost motion? What happens when you raise the letoff button (upper capstan) away from the Jack heel? Is the let off rail bracket bent down towards the keys? It looks a little off from the side view.

I wish that the video showed what the hammer is doing. Can you redo the video from slightly farther back? That will tell me if it letting off too soon.

« Last Edit: July 21, 2017, 05:20:59 PM by pianotuner steveo »
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 200A EP
1980 Wurlitzer 270 Butterfly Grand
2000 Yamaha acoustic piano
2004 Hammond XK3
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
....and a few guitars...

Offline Allenm

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Re: Cannot adjust letoff on 200a
« Reply #4 on: August 06, 2017, 11:46:06 PM »
In the video there is no gap from the top of the fly to the felt.

Offline Jenzz

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Re: Cannot adjust letoff on 200a
« Reply #5 on: August 07, 2017, 03:29:20 AM »
Hi .-)

The problem is that the jack trips without touching the adjusment screw before. I have seen this on many Wurlitzers. In some cases, the jack spring was not tight enough, but in most cases, the felt at the hammer butt became fluffed, getting to big and then actuating the the jack.

Jenzz

Offline cinnanon

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Re: Cannot adjust letoff on 200a
« Reply #6 on: August 07, 2017, 10:01:52 AM »
Yes trim some of that red felt away, or replace them all with some uniform thickness that is thinner than whats there. The fly is starting too far up the curved slope of the hammer and releases prematurely.

Offline pianotuner steveo

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Re: Cannot adjust letoff on 200a
« Reply #7 on: August 07, 2017, 12:11:35 PM »
Before trimming or replacing anything, lower the whip assembly a little and put a small gap between the top of the Jack, and the felt. There should be a little lost motion here.
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 200A EP
1980 Wurlitzer 270 Butterfly Grand
2000 Yamaha acoustic piano
2004 Hammond XK3
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
....and a few guitars...

Offline cinnanon

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Re: Cannot adjust letoff on 200a
« Reply #8 on: August 07, 2017, 01:33:49 PM »
Before trimming or replacing anything, lower the whip assembly a little and put a small gap between the top of the Jack, and the felt. There should be a little lost motion here.

How do you lower the whip assembly?

Offline pianotuner steveo

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Re: Cannot adjust letoff on 200a
« Reply #9 on: August 07, 2017, 02:55:37 PM »
The capstan screw that touches the key. On some models, this capstan is part of the key. (I.E. 140 series)  The hammers can only drop so far- there is a rail that they rest on so that you can make this adjustment without issues.  To my eye, it looks like the metal bracket that holds this wooden hammer rail up seems bent down towards the keys a little, but I would raise the key capstan up (to drop the whip down) first to see if that helps.
« Last Edit: August 07, 2017, 07:20:00 PM by pianotuner steveo »
1960 Wurlitzer model 700 EP
1968 Gibson G101 Combo organ
1975 Rhodes Piano Bass
1979 Wurlitzer 206A EP
1980 Wurlitzer 200A EP
1980 Wurlitzer 270 Butterfly Grand
2000 Yamaha acoustic piano
2004 Hammond XK3
2009 73A Rhodes Mark 7
2009 Korg SV-1 73
....and a few guitars...

Offline cinnanon

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Re: Cannot adjust letoff on 200a
« Reply #10 on: August 08, 2017, 10:48:04 AM »
The capstan screw that touches the key. On some models, this capstan is part of the key. (I.E. 140 series)  The hammers can only drop so far- there is a rail that they rest on so that you can make this adjustment without issues.  To my eye, it looks like the metal bracket that holds this wooden hammer rail up seems bent down towards the keys a little, but I would raise the key capstan up (to drop the whip down) first to see if that helps.

Oh i'm sorry I misunderstood.  I thought you were talking about a different adjustment other than the lost-motion capstan screw, like physically dropping the entire whip assembly across all keys.