[neonixie-l] Connector from glass to vacuum system
Hi folks, I received my needle valve yesterday and improved my vacuum system. It works nicely: I can evacuate the system down to about 0.01 mbar and then use the needle valve to let in well-defined amounts of Neon. I can easily adjust the pressure inside the system in steps of 0.1mbar which is more than sufficient. See my current setup here: http://www.jb-electronics.de/tmp/vacuum_system.jpg But there are some minor leaks, mainly caused by the rubber hose connectors that I use: I still have to figure out a proper way to connect my 8.8mm tubing to the KF16 flange system; right now I am using an ordinary rubber hose as seen in the picture. Does anyone know how to build or get a proper pump union? Just like here, but with a flange adapter: http://www.teralab.co.uk/Glass_Blowing/Pump_Unions/Pump_Unions_Page1.htm I do not have a lathe at my disposal. Also, the connection between the pressure reducer and the needle valve is not optimal. Any suggestions? Thanks Jens -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] Connector from glass to vacuum system
On 10/28/12 10:36 AM, jb-electronics wrote: Hi folks, I received my needle valve yesterday and improved my vacuum system. It works nicely: I can evacuate the system down to about 0.01 mbar and then use the needle valve to let in well-defined amounts of Neon. I can easily adjust the pressure inside the system in steps of 0.1mbar which is more than sufficient. See my current setup here: http://www.jb-electronics.de/tmp/vacuum_system.jpg But there are some minor leaks, mainly caused by the rubber hose connectors that I use: I still have to figure out a proper way to connect my 8.8mm tubing to the KF16 flange system; right now I am using an ordinary rubber hose as seen in the picture. Does anyone know how to build or get a proper pump union? Just like here, but with a flange adapter: http://www.teralab.co.uk/Glass_Blowing/Pump_Unions/Pump_Unions_Page1.htm I do not have a lathe at my disposal. Also, the connection between the pressure reducer and the needle valve is not optimal. Any suggestions? Thanks Jens Jens, I think it would be possible to drill the needed hole in the fitting using a drill press. The o-ring does the sealing work, so the hole does not have to be perfect. You can make the chamfer with a large countersink bit. -- David Forbes, Tucson AZ -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
Re: [neonixie-l] Re: OT - Raspberry Pi $25 credit card size Unix box
Just noticed this posted on a WS19 group by a G3:- Yet another noisy piece of kit to mess up the airwaves. I plugged in my new Raspberry computer. It seems to work OK but then I read the back of the slip of paper that fell out of the box (the only paperwork supplied in fact). It's EMC compliant only with Class A requirements, or in other words it's only good for operating in a commercial environment. It actually states that it will cause harmful radio interference in a residential area. As the Raspberry Pi is most definitely sold for home use the phrase (which I'm paraphrasing slightly) the user must pay for preventing it from interfering with radio sets comes into play. Fat chance it's even possible. Does anyone remember the good old days when you could listen on 20 metres and the background noise was so low you almost hear a pin drop in Australia? John K - Original Message - From: Quixotic Nixotic nixot...@blueyonder.co.uk To: neonixie-l@googlegroups.com Sent: Sunday, September 04, 2011 5:22 PM Subject: Re: [neonixie-l] Re: OT - Raspberry Pi $25 credit card size Unix box On 4 Sep 2011, at 07:10, Nick wrote: I've been watching this for a while since Rory Cellan-Jones (pronounced Keth-lan-Jones) first mentioned it (I went to school with him) - what puzzles me is who is funding it? They are all Cambridge-based (the UK one) and have some good people on board... Cambridge Uni funding? Certainly access to their resources. David Braben, the god who wrote the game Elite (among others), is possibly rich enough to put some of his own money into it, as are some of the others. It's a charitable foundation. The avowed intention is to encourage children to program as they did in the early days of home computers, so I expect there will be a whole suite of software and hardware add-ons to promote that, which in turn will be relevant to people such as us who like to make things work. Isn't it going to make an Arduino look rather archaic? John S -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/neonixie-l?hl=en-GB. -- You received this message because you are subscribed to the Google Groups neonixie-l group. To post to this group, send an email to neonixie-l@googlegroups.com. To unsubscribe from this group, send email to neonixie-l+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/groups/opt_out.
