[RASMB] Affordable Quartz window update!

[Chin, Christopher]

I think Neil is right, the TSL Group in the UK are now owned by
Saint-Gobain and they have exactly the same address. 
The following price list was quoted to me by Tina after I test their
disc. They have two type of disc and I test both of them side by side
with Meller's Disc. I can not tell the difference and they all hold up
well at 60,000 rpm after several runs (so far). 



-----Original Message-----
From: Scott, Tina [mailto:tina.m.scott at saint-gobain.com] 
Sent: Tuesday, July 06, 2004 3:55 PM
To: Chin, Christopher
Cc: Malone, Lee C.
Subject: RE: price list for the disc


Chris,
 
    Price varies on individual quantities under 125 pcs.  Here are some
intervals:
 
    1 pc = $635.69
    5 pc = $127.64
    10 pc = $64.13
    20 pc = $42.74
    30 pc = $37.34
    40 pc = $34.64
    50 pc = $33.02
    62 pc = $31.77
 
Please advise exact quantity and I will provide price. 
 
Thank you,
Tina

 

 

 

 


-----Original Message-----
From: Neil Errington [mailto:N.Errington at umist.ac.uk] 
Sent: Tuesday, July 20, 2004 2:47 AM
To: jphilo at mailway.com
Cc: Chin, Christopher; rasmb at server1.bbri.org
Subject: RE: [RASMB] Affordable Quartz window update!


Hi John, Chris and all.

We did use Saint-Gobain quartz windows while I was at Leicester &
Nottingham (right

As John saidd I did find a bit more noise and possibilities of cracking
at prolonged high speed use (50K and up). The cracking actually tended
to occur on deceleration from very high speeds, rather than during
acceleration or the run, so I did manage to minimise that by using
slower deceleration rates on the XL (decelerating at 200 rather than 400
seemed to help a lot). Other than that I found no problems with those
windows during other 'normal' use in the XL-A.

I can't remember if they were fused quartz but I would imagine that to
be the case - I think the product we used from Saint-Gobain was called
'Spectrosil 2000' if that helps anyone figure it out.

Best wishes to all

Neil

-- 
Dr. Neil Errington
Biomolecular Sciences Department
UMIST
PO Box 88, 
Manchester, 
M60 1QD, UK 
Tel: +44 (0)161 200 4191
Fax: +44 (0)161 236 0409 

Quoting John Philo <jphilo at mailway.com>:

> Chris,
>  
> Thanks for the info, but are you saying that this is a US supplier for

> the same low-cost quartz windows mentioned by Olwyn Byron back in '99 
> from a company called TSL group? And why not tell us all the actual 
> 'reasonable' price from Saint-Gobain Quartz?
>  
> Further, it may be important to note that the quartz windows supplied 
> by Beckman (made by Meller Optics) are listed by Meller as 
> single-crystal quartz, while these ones from Saint-Gobain are, I 
> believe, probably fused quartz.
>  
> I've never been entirely clear exactly why Beckman specifies 
> single-crystal quartz, but I'm guessing there is a difference in 
> strength or durability. Can someone else on RASMB or perhaps one of 
> the Beckman folks enlighten us on this?
>  
> I believe Neil Errington noted back in '99 that the low-cost quartz 
> windows from TSL gave higher noise and developed cracks with extended 
> use above 50K rpm.
>  
> John Philo
> 
> -----Original Message-----
> From: rasmb-admin at server1.bbri.org 
> [mailto:rasmb-admin at server1.bbri.org] On Behalf Of Chin, Christopher
> Sent: Monday, July 19, 2004 2:08 PM
> To: rasmb at server1.bbri.org
> Cc: tina.m.scott at saint-gobain.com; Lee.c.Malone at saint-gobain.com; 
> nancy.j.heid at saint-gobain.com
> Subject: [RASMB] Affordable Quartz window update!
> 
> 
> Affordable Quartz window update
> 
>  
> 
> Dear RASMBers,
> 
>  
> 
> Just want to share this information with you that Saint-Gobain Quartz 
> USA sells windows that we can use with an affordable price.  I have 
> done some test (enclosed) on these products and feel it is comparable 
> to the product I got from Meller Optic.  I believe this company is the

> same company mentioned
> in 1999 rasmb_archives. 
> 
> For those who are interested you can contact;
> 
>  
> 
> Tina M. Scott
> 
> Saint-Gobain Quartz USA
> 
> Sr. Customer Service Specialist
> 
> Phone:  502-775-7383
> 
> Fax:  502-775-7385
> 
> Email:  tina.m.scott at saint-gobain.com
> 
> Web Site:  www.quartz.saint-gobain.com 
> <outbind://6/www.quartz.saint-gobain.com>
> 
>  
> 
>  
> 
> By the way, does any body know if we can purchase some reasonable 
> priced "cell Housing Plug"?
> 
>  
> 
>  
> 
> All the best.
> 
>  
> 
> Chris
> 
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> 
> -------------------------------------------------------------
> 
> Christopher Chin
> 
> Manager
> 
> Sealy Center for Structural Biology
> 
> HBC&G, 5134 MRB. rt1055
> 
> UTMB  <mailto:cchin at utmb.edu> cchin at utmb.edu,
> 
> 409-772-1693, efax 708-585-1920
> 
> -------------------------------------------------
> 
>  
> 
>