Date: Wed Apr 11 15:37:53 2007

Author: Bill Norwood

Subject: Re: Wanted: Tubes for old Sargent-Welch e/m apparatus

Post:
Hi Tappers,

I never quite got our conclusion:
Is it true that there is currently no source
for either the new tubes or for re-conditioning the old tubes?

Many thanks,

Bill Norwood


-----Original Message-----
From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
Behalf Of Tara Panagopoulos
Sent: Thursday, April 05, 2007 7:57 PM
To: tap-l@lists.ncsu.edu
Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus

I also agree that nothing else compares to this original e/m apparatus. We
have managed to maintain 8 set-ups with a growing concern that they will
need to be replaced. We have a few spare tubes for back-up but were under
the impression they could be replaced through Sargent-Welch. I have already
expressed to Sargent-Welch that they should consider building the same
apparatus. If there are enough of us with the same request they may consider

it a worthwhile idea.

Tara Panagopoulos
Laboratory Manager, Department of Physics
Cleveland State University
SI-107
216-687-2076

----- Original Message -----
From: "Michael A Thomason"
To:
Sent: Thursday, April 05, 2007 3:43 PM
Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus


> The size of this apparatus, which is our only complaint, is its greatest
> advantage as a lecture demonstration! Video projection is still necessary
> in a lecture hall, but video can't compensate for the smallness of the
> other
> versions.
>
> I agree there is nothing else available that compares. I'm not sure the
> shops here would be interested or have time for these tubes. I hope
> someone
> will adopt this project,
>
> Michael Thomason
> Director of Physics Learning Laboratories
> University of Colorado Boulder Department of Physics
> 303-492-7117
> thomason@colorado.edu
> http://physicslearning.colorado.edu
>
>
> -----Original Message-----
> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
> Behalf Of J. Terrence Klopcic
> Sent: Thursday, April 05, 2007 11:26 AM
> To: tap-l@lists.ncsu.edu
> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>
> Martin retired? Ouch.
>
> Another fiber in the thread on the old S-W e/m tubes: Someone mentioned
> the
>
> possibility of finding a glassblowing shop that had the ability to
> recondition old tubes. (Basically, open them, replace the filaments,
> check/fix the integrity of the feed-throughs, evacuate, add a drop of Hg
> and
>
> reseal under vacuum.) I expect that we, collectively, have hundreds of
> defunct tubes lying about hoping for another chance at life. Is anyone
> sufficiently motivated (desperate) to honcho a massive reclamation
> project?
>
> Terry
>
> J. Terrence Klopcic
> Director of Laboratories
> Departments of Physics and Mathematics
> Kenyon College
>
>
> ----- Original Message -----
> From: "Sam Sampere"
> To:
> Sent: Thursday, April 05, 2007 1:08 PM
> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>
>
>> Last time I checked, the bright spot has turned into a black hole.
>> Martin retired!
>>
>> Sam
>>
>> -----Original Message-----
>> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
>> Behalf Of J. Terrence Klopcic
>> Sent: Thursday, April 05, 2007 12:58 PM
>> To: tap-l@lists.ncsu.edu
>> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>>
>> Scott,
>>
>> Whoops. The preceding forwarding of an e-mail I received from
>> Sargent-Welch
>> kinda got away before I could annotate it.
>>
>> The e-mail is from a thread on the subject of the S-W e/m tubes that
>> went
>> around about two years ago. Yes, there are several of us who are still
>> using the big, old, beautiful S-W e/m apparatus. As I recall, in the
>> previous thread, it was reported that S-W does still handle the tubes,
>> although you would never know that from the catalog nor the typical
>> customer
>> service rep. (The e/m thread was followed by one, not nearly so
>> complimentary, on S-W itself.) As of two years ago, S-W was contracting
>> out
>> to some company to produce a batch of tubes, but only sporadically.
>>
>> Martin Taylor (Martin_Taylor@vwr.com), whom I eventually contacted,
>> appears
>> to be a real bright spot in the S-W organization - very knowledgeable
>> and
>> eager to be helpful to customers at our level. Perhaps he can be of
>> service.
>>
>> Good luck.
>>
>> Terry
>>
>> who agrees with Bill on the weight and bulkiness of the apparatus - but
>> finds that all that evaporates in the cool blue glow of the bending
>> beam.
>>
>> ----- Original Message -----
>> From: "Scott Shelley"
>> To:
>> Sent: Thursday, April 05, 2007 11:41 AM
>> Subject: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>>
>>
>>> Hello all,
>>>
>>> I've just done a boneheaded thing and I'm hoping that some members of
>> this
>>> list can help me out.
>>>
>>> We own seven of the beautiful old Sargent-Welch WL0623A e/m
>> apparatuses
>>> (circa 1960s?). I like these so much that I can't bear to replace
>> them
>>> with newer experiments, even though we don't have a sufficient number
>> to
>>> adequately outfit our labs. To remedy this situation, I had my
>>> machinist manufacture two more devices, which I was hoping to outfit
>> with
>>> two extra tubes that we own.
>>>
>>> Stupidly, I neglected to test these tubes and one of them has a
>> burnt-out
>>> filament. To compound the issue, another of the tubes stopped working
>>
>>> this year.
>>>
>>> So, here's the dilemma: I've had my machinist build beautiful
>> duplicates
>>> of the WL0623As, but I don't have any tubes to put in them. Before I
>> give
>>> him bad news and ask him to alter his design to accept some of the
>> newer
>>> tubes on the market, I thought I'd write in to see if any of you have
>>> extra tubes that you'd be willing to sell.
>>>
>>> Thanks very much!
>>>
>>> Scott Shelley
>>> Haverford College.
>>>
>>>
>>
>>
>>
>
>




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