Wurlitzer 2400s speed issue

[jukenorman]

Richard, I have mesaged you regarding the pulley! Norman.

[stillinlovewiththis]

Okay, another day, another speed test.
Had a package just arrive with another new belt, motor rubbers and a few other bits. The belt is identical to the ones I already have so I’m happy I’m using the right one at the right tension.
Next up, the new rubbers. Fitted them easily enough. The bottom ones look identical but the top ones look a bit thicker. All good so far, onto the speed test.
Same disc as yesterday, 3’43 running time according to the label. Identical results to yesterday. Identical almost to the second, 7 seconds late at 3’50. Another manual count of the tip ex mark this time for 3 minutes, 126 revolutions which is obviously 42rpm as yesterday.

Stay tuned readers, new pulley incoming….

[stillinlovewiththis]

SUCCESS!!! We’ll, almost.
Thanks straight away to both contributors to this enquiry. Together you have helped me sort it. The pulley arrived today and was waiting when I got home. So, without further ado I pulled the motor off and removed the existing pulley, marked 61114. At this point I was sceptical as to whether this would work because the outside diameter of both pulleys was almost identical at 70mm +-1. However, when I came in and did the speed test, guess what? The 3’43 undinked single came in at 3’43 and the three minute revolution tip ex count had risen from a very steady 126, 42rpm to 132 and 44rpm!

Okay straight off the bat, when I played the record the first time I was absolutely convinced it was no faster. This is a song I really know as well. Did it sound slow? Was I imagining things? Was it actually slow? I’m struggling to comprehend why it sounded this way because I played it again straight afterwards and did the revolution counting and it sounded identical and it’s at 44rpm.

I understand how readers will question how we’ve had this 20 years and waited so long to sort out the issue. Obviously I haven’t done much critical listening to stuff I’m ultra familiar with. Or, if you consider for a moment that I might be actually enjoying the music without concentrating too much. Either way 44rpm is close enough.

Obviously while the motor was off in my hand it gave me the chance to oil the felt washers etc and this must have done some good the last week or so.

There we are, that’s all from me. One happy owner.
Thank you.

[jukenorman]

Hi Richard,
There are two grooves on that pulley, do you have the belt on the larger diameter one? Also when I made my calculations, I had it in my head that your jukebox was running at 43rpm - doh! But I do have a slightly larger pulley; I've just measured it and it would take a 61114 running at 42rpm up to 45rpm. Progress though!

Norman.

[stillinlovewiththis]

Wow, fantastic. I’ll speed test them both again tomorrow and get back to you. To be honest I tried them both and decided by ear which was the better sound. Of course we know what my history in this area is like. Yes, definitely interested in another pulley. Someone said to me years ago, “it takes just as long to do it wrong, as it does to do it right”…We’re nearly there so let’s do the job right.
Thanks again,

[stillinlovewiththis]

All sorted now. One very happy camper here.
The new pulley arrived with the post today. I already had the motor off waiting for it and once fitted I commenced to speed test it again. A1 perfect. 3 mins at 45 rpm and I counted 135 revolutions. This started at 126 rpm last week, then 132 with the first pulley and finally today 135.
I’m intending to play all the selections over the next few days starting at A1 and gradually working through them all.

Thanks everyone for your help. This has been a fantastic outcome.

[phil]

Hello
once you have changed your pulley, the easiest and most precise way to control the number of revolutions / minute and the
DT2234C
search on google, it's cheap and very precise
we glue a small piece of aluminum colored stiker on the large pulley and we direct the laser beam on it, the reading is direct after three turns of the pulley
simple not expensive effective but Chinese
Phil