[Jukebox-list] Tormat selection

[Wesley Dean]

    Ron, the 2050 has a filament and has a warm up time. Another thyratron 
is a 0A4G is a cold cathode type and has no filament. Something like the 0A2 
regulator tubes. The 2D21 types as used in the TSR-1 in the V-200 are a 
miniature version of 2050. And they were used in the write in, read out and 
stepper circuits. This was the only model that used these. The TSR-3 was 
more simple. There was a retrofit sullplied for the replacement of the TRS-1 
in the V-200. Many owners opted not to take advantage of this offer and 
there is a lot of TSR-1 still out there.
    The 2050 is used in the trip circuit and it is possible that if the juke 
is turned on and a selection is made close to the park position before the 
tube warms up the mechanism may miss the selection on the first pass, but 
should get it on the second pass.  Wes
      ----- Original Message ----- 
From: "Ron Rich" <ronnnrich at yahoo.com>
To: "Jukebox mailing list" <jukebox-list at lists.netlojix.com>
Sent: Wednesday, August 15, 2007 7:16 PM
Subject: Re: [Jukebox-list] Tormat selection


Steve,
  Answer to your question is both--however, the "thyratron" ( aka "2050") is 
in neither the write in, nor read out, circuits. It resides in the "trip" 
(both on, and off the record) circuit. Another 2050 needs to be installed 
for use with the wallbox pulses, if stepper operation is desired.
  The way I think of the tube's operation, is that it's just a simple 
(electrical) relay, or, an opto isolator. It is "pulsed", which causes it to 
"fire and "energize" an isolated DC coil (of some type--depending on the 
app.).
  Ron Rich

Steve Wahl <steve at pro-ns.net> wrote:
  As a seeburg-inexperienced bystander, I am curious if the tube(s) that
need warming up are in the write in circuit, the read-out circuit, or
both?

I belive I heard there's a tube in the read-out circuit, but I recall
it being called a "thyratron" (or something like that), and I may be
getting my technologies confused... but I recently read an interesting
article that talks about a calculator that used "cold-cathode" tubes,
and that article also revers to thyratron tubes.

This is the article:
http://www.oldcalculatormuseum.com/anitaC-VIII.html

I could be confusing many things: Is thyratron really the word used
for the tube in the seeburg read-out circuitry? The calculator
article doesn't say that all thyratrons are cold-cathode, but makes me
wonder if they are.

Hope you guys don't mind me trying to satisfy my curiosity here!

--> Steve Wahl


On Wed, Aug 15, 2007 at 09:04:18AM -0700, Tyler, Ronald wrote:
> Wes is saying what I said (or meant to say).
> Ron Tyler
>
> ________________________________
>
> From: jukebox-list-bounces at lists.netlojix.com on behalf of Wesley Dean
> Sent: Wed 8/15/2007 8:46 AM
> To: Jukebox mailing list
> Subject: Re: [Jukebox-list] Tormat selection
>
>
>
> All cathode type vacuum tubes require a warm up time. A paying customer
> expects the juke to be plugged in by the help earlier. Wes
> ----- Original Message -----
> From: "Ron Rich"
> To: "Jukebox mailing list"
> Sent: Tuesday, August 14, 2007 8:37 PM
> Subject: RE: [Jukebox-list] Tormat selection
>
>
> Not really--do you think that paying customers, in a comercial location
> would put up with that for a minute? Tube warm up-if everything is working
> well, should be no longer than one minute-which is very long !! Ron Rich
>
> "Tyler, Ronald" wrote: That is exactly the
> way it is supposed to act. Trust me.
> RTyler
>
> ________________________________
>
> From: jukebox-list-bounces at lists.netlojix.com on behalf of N M
> Sent: Tue 8/14/2007 5:12 PM
> To: jukbox reply list
> Subject: [Jukebox-list] Tormat selection
>
>
>
> Hi all, I know I've only posted a few times but, I was
> hoping you guys could give a little insite on a
> problem.
>
> I'm dealing with a Seeburg 101. When you first switch
> the machine on and make a selection, it will do the
> scan twice and stop. After it does it one time (scan
> 2 and stop) it will never do it again. It will work
> fine as long as it's pluged in. After you unplug it,
> it will do the same thing on the first time you make a
> selection.
>
> Sound to me like a cap is acting up. You know,
> building up charge the first time a selection is made
> and the working ok from then on out.
>
> The selection receiver has been rebuilt. You guy got
> any ideas? I'm puzzled.
>
> Nick
>
>
>


-- 
Steve Wahl steve at pro-ns.net

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