<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:12pt"><div><span>Hi John,</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span>What did you end up with, turbo-wise? I do a brisk business in those, have a good dozen or so. It's hard to find a good one on the cheap. <br>You really can't evaluate the bearings until they are at full speed under vacuum. <br></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px;
font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span>Weekends work well for me too, esp. Saturdays. <br></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span>I've been looking into commercial sputter coaters and they're just about as simple as I expected. One thing I hadn't thought much about was a thermocouple gauge for it. I probably have a tube I can donate but not a readout/meter. They're pretty simple in theory so anyone willing to solder one up...please step forward. We might be able to find a Mini-Convectron on Ebay for about $50... _maybe_. <br></span></div><div style="color: rgb(0, 0, 0); font-size:
16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><br><span></span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span>-Jeff</span></div><div style="color: rgb(0, 0, 0); font-size: 16px; font-family: times new roman,new york,times,serif; background-color: transparent; font-style: normal;"><span></span></div><div><br></div> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div style="font-family: times new roman, new york, times, serif; font-size: 12pt;"> <div dir="ltr"> <hr size="1"> <font face="Arial" size="2"> <b><span style="font-weight:bold;">From:</span></b> John McMaster <johndmcmaster@gmail.com><br> <b><span style="font-weight: bold;">To:</span></b> sem@lists.noisebridge.net <br> <b><span style="font-weight: bold;">Sent:</span></b>
Tuesday, July 9, 2013 11:26 PM<br> <b><span style="font-weight: bold;">Subject:</span></b> Re: [Sem] Retaining the SEM and building a sputter coater<br> </font> </div> <div class="y_msg_container"><br><div id="yiv717177975">
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<div class="yiv717177975moz-cite-prefix">FWIW I am converting my vacuum system
from diffusion to turbo pumped. Assuming it works (they are
really expensive working so I had to piece it together from eBay
after doing a bunch of research) I may have a Varian diffusion
pump to donate to NB for SEM / sputter system use. I will try to
play around with coating on my setup in the near future.<br>
<br>
Let me know if there is interest for people to discuss and plan
things out. I can usually only meet on weekends though.<br>
<br>
On 07/09/2013 12:08 AM, Jeff Miller wrote:<br>
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<div style="color:#000;background-color:#fff;font-family:times new roman, new york, times, serif;font-size:12pt;">Well it's a
bit of a catch-22. As long as there's ongoing interest in the
SEM and we can keep it and the space free from decay, the SEM
can stay. If it's underutilized and falls into disrepair, it
should go somewhere it might be better appreciated.<br>
<br>
I haven't seen the space lately but it sounds finished enough.<br>
<br>
I think we should put the priority on building a sputter coater.
It should be fairly simple to do. I've seen some pretty poor
designs on YouTube that still sort of work. I think we could
build a pretty nice one over 2 or 3 months of weekends, tops.<br>
<br>
Probably <$100 in parts that we can't scrounge or make for
something quite nice.<br>
<br>
I'll be looking at commercial designs this week and try to come
up with some plans this week and next.<br>
<br>
-Jeff<br>
<br>
<br>
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