Date: Thu Apr 19 11:20:28 2007

Author: Tara Panagopoulos

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

Post:
Chuck,

We don't have any tubes that aren't functioning but I will save them if we
do. I have taken apart some of the wooden enclosures of the back-up ones but
did not find any specific info. If I do find anything, I will let you know.

Tara

----- Original Message -----
From: "Chuck Patten"
To:
Sent: Thursday, April 19, 2007 9:52 AM
Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus


> Hi Tara,
>
> I'm not doing this as a business, just someone trying to help out the
> community and see what is needed and if it is possible to get them made.
> That is why we need to identify the parameters and variations in what each
> site needs. As you mention having a backup stock, can you save the ones
> that are no longer functioning instead of discarding them in the future
> please? Are there any markings on the tubes, internal markings visible,
> packaging details, or leaflets packaged with the tubes? Every scrap of
> information will be needed if we have to have them constructed at a
> manufacturer who has not made them previously.
>
> cheers,
> chuck...
>
>
> -----Original Message-----
> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
> Behalf Of Tara Panagopoulos
> Sent: Thursday, April 19, 2007 5:58 AM
> To: tap-l@lists.ncsu.edu
> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>
> Chuck,
>
> CSU would definitely be interested in new tubes for the 0623B e/m
> Apparatus
> but probably not for a couple of years; we currently have a large back-up
> supply. Our rep from Sargent-Welch said he was working to find out if we
> could get replacements but has not gotten back with us. It sounds like you
> have determined they can't so thank you for your efforts and keep us in
> mind
> as a consumer of those tubes in the future.
>
> Tara
> Cleveland State University
>
> ----- Original Message -----
> From: "Chuck Patten"
> To:
> Sent: Wednesday, April 18, 2007 7:59 PM
> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>
>
>> Thanks, Any thing regarding the voltages, and especially detailed
>> drawings,
>> specs will help. Also if we can get a rough count of how many new tubes
>> would be wanted and how many inop tubes are being held for potential
>> repair
>> would allow us to properly scope the effort and potentially get much
>> better
>> pricing.
>>
>> cheers,
>> chuck...
>>
>>
>> -----Original Message-----
>> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
>> Behalf Of J. Terrence Klopcic
>> Sent: Wednesday, April 18, 2007 7:25 AM
>> To: tap-l@lists.ncsu.edu
>> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>>
>> Chuck,
>>
>> Thanks for not letting this topic die. Were some glassblower to take on
>> the
>> task of rebuilding the derelict tubes that so many of us are holding,
>> he/she
>> could set up for a surge, do a thousand or so, and keep us running for
>> many
>> years - as well as keeping all those otherwise-valuable tubes out of
>> landfills.
>>
>> I have a yellowing copy of "Instructions for Use of 0623B e/m Apparatus"
>> by
>> the Sargent-Welch Scientific Company which gives a lot of information on
>> the
>> large tube apparatus that I, and apparently several others, treasure. I
>> would be glad to make copies and send them to whomever.
>>
>> Terry
>>
>> J. Terrence Klopcic
>> Director of Laboratories
>> Departments of Physics and Mathematics
>> Kenyon College
>>
>>
>>
>> ----- Original Message -----
>> From: "Chuck Patten"
>> To:
>> Sent: Tuesday, April 17, 2007 10:23 AM
>> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>>
>>
>>> Does anyone have any datasheets, hi-res pictures, info on the tubes?
>>> There
>>> seem to be two basic different physical types that the group is looking
>>> for.
>>> I am trying to find a source that would be willing to make new ones and
>>> or
>>> repair the ones needing new filaments. So far the info seems to
>>> indicate
>>> that they may be filled with two different gasses at different
>>> pressures,
>>> different electrode designs, etc.
>>>
>>> thanks,
>>> chuck...
>>>
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
>>> Behalf Of Tim Cook
>>> Sent: Thursday, April 12, 2007 5:39 PM
>>> To: tap-l@lists.ncsu.edu
>>> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>>>
>>> If you look at the Sargent Welch link below you'll see they are out of
>>> stock
>>> but will be available. We just received some after a lengthy wait.
>>> I always thought Electro Technique Products was the manufacturer. I'm
>>> skeptical that Tel-atomic was ever involved. If you order one, be sure
>>> to
>>> test it right away. Sometimes they are defective with dim beams, or the
>>> pin
>>> geometry is bad enough that you can't take data,
>>>
>>> http://www.sargentwelch.com/product.asp?pn=WL0623_EA&ss=wl0623
>>>
>>> You can see a picture of the tube on our web site, at
>>> http://pirt.asu.edu/detail_10.asp?ID=547 . I believe The description is
>>> in
>>> error in calling it Specific Charge of electron apparatus. We're trying
>>> to
>>> get time to change it to "charge to mass ratio of the electron
>>> apparatus"
>>>
>>>
>>> Tim Cook, Ariz. State
>>>
>>>
>>>
>>> -----Original Message-----
>>> From: tap-l-owner@lists.ncsu.edu [mailto:tap-l-owner@lists.ncsu.edu] On
>>> Behalf Of Scott Shelley
>>> Sent: Thursday, April 12, 2007 9:08 AM
>>> To: tap-l@lists.ncsu.edu
>>> Subject: Re: [tap-l] Wanted: Tubes for old Sargent-Welch e/m apparatus
>>>
>>>
>>>>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?
>>>
>>> Here's the result from the research I've done:
>>>
>>> I called Sargent-Welch and spoke with the buyer for the tubes specified
>>> on
>>> page 773 of their 2006-2007 catalogue as:
>>> "Replacement Tube for Older Model of e/m apparatus", part number WL0623.
>>> Also mentioned is that these are replacement tubes for the WL0623B
>>> apparatus.
>>> (My apparatuses are WL0623A - does anyone know if this is different?)
>>>
>>> Sargent-Welch couldn't give me any information on these tubes (not a
>>> photo
>>> or even their diameter), so he had me call their supplier of this part,
>>> which happens to be Tel-Atomic.
>>>
>>> I spoke to a gentleman at Tel-Atomic who knew of the tubes I'm seeking,
>>> but
>>> assured me that they're no longer made (at least not by Tel-Atomic).
>>>
>>> Scott.
>>>
>>>
>>>
>>>
>>
>



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