[Jukebox-list] "Absorption" -was Wurlitzer P-12

[Ron Rich]

Wes,
  Very nicely explained--still think Bob's word, "absorption" is also a great term for the process---Ron Rich

The Jukebox Junkyard <jukeboxjunkyard at cox.net> wrote:
  Bob, way back then light bulbs were less costly than transformers. The 'add credit' coil is low voltage. The lamp serves as a current limiter to protect the coin switches. The characteristic of an incandescent lamp's filament draws approx. ten times the current cold as opposed to hot. This initial inrush may be used to energize solenoids that are not continuous duty and once they have operated, the lamp will reduce the current to a safe level for continuous duty as in a stuck coin switch. I use this concept quite frequently in modifying troublesome circuits. Rock-Ola uses this trick to apply DC voltage to the AC search motor as a dynamic brake. This is also the function of a barriter in Rock-Ola and Wurlitzer amplifiers.Wes 
----- Original Message ----- 
From: "Bob Ellingson" 
To: "Jukebox mailing list" 
Sent: Tuesday, October 17, 2006 5:18 PM
Subject: Re: [Jukebox-list] Wurlitzer P-12


> At 01:39 PM 10/17/2006 -0700, you wrote:
>>If you don't have the double socket, be sure to find out why--the lamp acts
> as a "another fuse" (in the coin circuit--If I recall correctly), and is
> required--along with the fuse, of course. Ron Rich
>>
> 
> Yes, but it can't be replaced by a fuse! It is indeed in the credit circuit,
> and I think it adds a either a little bit of delay or a little bit of current
> "absorption"...can't remember, I'll have to dig out the Dr. Know-it-all article
> where he describes what it does.
> 
> --Bob
> =======================================================================
> Bob Ellingson bobe at halted.com
> Halted Specialties Co., Inc. http://www.halted.com
> 3500 Ryder St. (408) 732-1573
> Santa Clara, Calif. 95051 USA (408) 732-6428 (FAX)
> 
> _______________________________________________
> Jukebox-list mailing list
> Jukebox-list at lists.netlojix.com
> http://lists.netlojix.com/mailman/listinfo/jukebox-list
_______________________________________________
Jukebox-list mailing list
Jukebox-list at lists.netlojix.com
http://lists.netlojix.com/mailman/listinfo/jukebox-list


 			
---------------------------------
Get your own web address for just $1.99/1st yr. We'll help. Yahoo! Small Business.