no Bertan, but another possibility

["Paul T. Debevec" <debevec@uiuc.edu>]

Dear Peter,

Bertan no longer makes power supplies appropriate for wire chambers.  See
http://www.bertan.com/products.html
The one surplus equipment company that I know of, OE Technologies, had 
nothing. 

Mats Selen has two Vern Kiebler power supplies.  They look like Bertan 
clones.  I think that Kiebler was a small company close to Fermilab.  
These supplies are probably 30 years old.  They are listed on the 
Fermilab equipment pool.  See
http://www-esd.fnal.gov/esd/catalog/main/fermilab/es7125.htm

I did a quick check.  All channels give voltage.  I put 3 kV into 10 
Mohm.  Current trip at 80% of full scale works.  Trip at 0.8 kV on the 
0.1 mA scale.  I can have some one box them and ship them to you if you 
thing that these would be useful.  Mats does not need them back any time 
soon.

Regards, Paul

Peter Kammel wrote:

>Dear Paul,
>
>Thanks for the clear answer. Probably one channel is not worth sending.
>If you could contact Bertan that would be great to explore this option.
>I will look around here.
>
>Best regards
>
>Peter
>
>
>On Wed, 19 Apr 2006, Paul T. Debevec wrote:
>
>  
>
>>Dear Peter,
>>I never had red Bertan supplies.  I do have (but I do not know where it 
>>is) a supply with a gray panel that had one channel negative and one 
>>channel positive.  I think that this is the supply that you used when 
>>the ePC were here.  I doubt that you will find Illinois property tags on 
>>the red supplies that you are using.  If one channel is useful, I can 
>>hunt for the gray panel supply.  It is likely with Steve or Matthias.  
>>If you need more than one channel, we can see if one of our high energy 
>>colleagues can help out.  Both Mats Selen and Steve Errede have done 
>>chambers and may have something available.  I could contact Bertan to 
>>see if they have some in stock. My guess is no.  I am out of town 
>>Friday, but I will look for email later today and Thursday.
>>Regards, Paul
>>
>>Peter Kammel wrote:
>>
>>    
>>
>>>Dear Paul,
>>>
>>>The detector group asked us, whether we are using their positive
>>>Bertan chamber HV supplies for the ePC (the red type, not the
>>>orange one). They need them.
>>>I am using two of these HV supplies. I kind of
>>>remember that I used one or two of yours for the ePC chamber
>>>tests in your lab. But I am not sure whether we shipped
>>>yours or are using the supplies from the detector group.
>>>I looked in my shipping papers, but did not find evidence
>>>for a shipment from Illinois.
>>>
>>>Thus the following questions arise:
>>>
>>>- Can you remember how many red = positive HV supplies you have?
>>>- Are they still in Illinois? 
>>>
>>>The answers to both questions would be helpful.
>>>If they are in Illinois I would ask you to be so kind to send them.
>>>If you had some, but they are not in Illinois, then they are
>>>probably here and I would shut down the running chambers and
>>>pull them out to see whether there is an Illinois label
>>>or identifiable serial number on them.
>>>
>>>Many thanks
>>>
>>>Peter
>>>
>>> 
>>>
>>>      
>>>
>>-- 
>>Paul T. Debevec
>>405 Loomis Laboratory of Physics
>>University of Illinois at Urbana-Champaign 
>>1110 W. Green St.
>>Urbana, IL 61801-3080 MC-704 
>>Telephone: 217-333-0285
>>Fax: 217-333-1215
>>email: debevec@uiuc.edu
>>
>>    
>>
>
>Peter Kammel  /  pkammel@uiuc.edu
>Department of Physics, Loomis Laboratory
>University of Illinois at Urbana-Champaign
>1110 West Green Street, Urbana, IL 61801 
>Tel (217) 333-5424 / Fax (217) 333-1215   
>
>  
>

-- 
Paul T. Debevec
405 Loomis Laboratory of Physics
University of Illinois at Urbana-Champaign 
1110 W. Green St.
Urbana, IL 61801-3080 MC-704 
Telephone: 217-333-0285
Fax: 217-333-1215
email: debevec@uiuc.edu