Phonoland

Ron, thta is good to know. The only reservation I have is that I don't use tubes in these machines and the SCR's pass a bit more current.

I'm actually surprised that a 2050 could conduct enough to blow the main fuse!

Rob

Ron, I did not remove the trip coil when cleaning, but I was extra cautious about not getting it wet. I've removed it now and the coil measures around 7 ohms. Rob, are you sure it should be 250 ohms ? Many of my pinball coils are around 7 to 13 ohms. Also, I see the recommendation on page 17 of Rons guide to add a 1 amp fast blow to the white wire on the coil, which I will do. I was a bit confused at first due to the use of both detent coil and trip coil for the same part, but page 26 of the guide cleared that up. Assuming this coil is bad are they readily available ? or will I need to wind my own, which by the way, I have done before and it is really fun . Thanks again.

Jim,
Iffin, you had READ, my "Seeburg Mechanism Guide" first, and had followed all of my advice, you would have removed that coil, before washing --
It's shorted ! Rob is correct--250-300 ohms is right ! Have fun, or---
I have a few left, and I believe (Vern) Jason Tisdale still has them for sale--see above for his address-
Ron Rich

Ron Rich wrote:Jim,
Iffin, you had READ, my "Seeburg Mechanism Guide" first, and had followed all of my advice, you would have removed that coil, before washing --
Ron Rich

Ron, I have to admit that I didn't purchase the guide until after I had already committed some sins pm me the coil price if you could. Thank you.

Jim,
I just checked my stock-only two left--I don't want to sell them, as I would just have to re-purchase them--contact Tisdale--

FWIW: I prefer to put the fuse at the output of the transformer as the 150VAC is always present in both trip and stepper (letter) coil.

Rob/NYC

Rob,
Great point, I never thought of--is a 1 amp sloblo going to blow fast enough to protect the transformer, if the detent coil shorts ? Ron Rich

Ron, I did try a destructive test -once- and there was enough current to blow a 1-slo. Your suggestion of a fast is probably good too -if- it will hold when both stepper and trip are energized through SCR's. Again, I'm surprised that there was enough current through a 2050 to blow the main-5.

Rob

Rob,
Yea--a 2050 will handle that current--once--maybe--transformers don't seem to like it much tho---Ron Rich

Ron Rich wrote:Jim,
It's shorted ! Rob is correct--250-300 ohms is right ! Have fun, or---
Ron Rich

Jason sent me the coil yesterday and yes it measured 242 ohms. Looking at the wire size, it is a much thinner gage than the original coil that came with the machine. I'm pretty sure that someone before me installed that 7 ohm coil with the large gauge wire which almost fried the 2050 tube, also originally they had a 10 amp fuse in the 5 amp holder !, so happy I corrected that prior to powering up. Just got done installing the new trip coil with a fuse as Ron suggested and powered up (drum roll ....), all is working well, no bright glow from the 2050, no blowing of the 5 amp main, just the nice sound of the record being selected and played. Time to move on to refurbish the amp. Thanks for all the helpful comments.
Jim

Jim,
Glad you found it ! Who wooda thunked, that one of "Rob's {Geppeto} Friends", afixeditby, put-tin in a coil designed for an-nother model ?? Ron Rich

Ron Rich wrote:Jim,
Glad you found it ! Who wooda thunked, that one of "Rob's {Geppeto} Friends", afixeditby, put-tin in a coil designed for an-nother model ?? Ron Rich

I don't know Ron, something doesn't add up here. Jim wrote that the machine worked for

" about 15 various selections and it worked every time, yay."

-if the coil was at that low a reading the whole time I don't see how that would have been possible. Not that i'm dismissing the the Gepetto factor ...of course.

Rob

Rob, I thought the same thing (somewhat), how, after working for 15 selections, could the coil all of a sudden short out ? Each time it worked I did get a bright flash on the 2050 tube, but not the long glow prior to the fuse dropping out. Now with the new coil, I don't even see a hint of the bright flash. So, being anal (like most on this board) I decided to unwrap the possible "shorted coil" looking for a short/hot spot along the way, and then also ran the wire 6 times across the basement to be sure it could not short(200 Ft) then measured the wire ohms at 8 when unstrung. Coil looked good or at least was (past tense).

Jim, Rob,
The 250 ohm coils usually "short" to ground--either the top, or bottom support, and sometimes through the center sleeve?
Seeing as that is the wrong type coil, perhaps it did not short, but repeated use of it, caused an internal problem in the 2050 ?? Ron Rich

Found a new selection issue, the current status it that the juke will select 159 out of 160 selections. When I select A1 it moves just in front of the first slot and proceeds to play an air record. Upon selecting B1, all works well and all others at the other end of the rack work. So not sure why this would happen. Does a limit need to be adjusted ?
Thank you.
Jim