tag:blogger.com,1999:blog-401164737462963207.post6546182668087094453..comments2024-03-28T00:14:10.834-07:00Comments on Ben Krasnow: DIY liquid nitrogen generatorBen Krasnowhttp://www.blogger.com/profile/04234629396863486242noreply@blogger.comBlogger325125tag:blogger.com,1999:blog-401164737462963207.post-30976174500026484892022-09-06T02:21:27.726-07:002022-09-06T02:21:27.726-07:00What you need is a BAS16 diode, and a couple of re...What you need is a BAS16 diode, and a couple of resistors to shift the response curve to match the built-in sensor. Details are in this comment https://benkrasnow.blogspot.com/2008/08/diy-liquid-nitrogen-generator.html?showComment=1442867051037#c5047613492308509805<br /><br />In terms of the rest of the circuit, it is a superconducting filter on the surface of the ceramic base. The shape results in an inductance/ capacitance combination which gives very sharp separation/combination of different frequency RF signals. Some models also include a FET RF amplifier to boost signals. Neither part is needed for the cryocooler.colintdhttps://www.blogger.com/profile/11573258337233231284noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-32173482933234194242022-09-05T13:17:17.432-07:002022-09-05T13:17:17.432-07:00ColinTd,
I know its been a hot minute, but I was ...ColinTd, <br />I know its been a hot minute, but I was wondering if you ever identified a worthy replacement diode for the ceramic mounted unit internal to the Dewar. <br />Secondarily, I was trying to figure out what the second item was on that chip, there is a little set of thin bonding wires in that section that attaches to the heat sink block and whatever is embedded in the block in that area, any ideas?<br />Jayhttps://www.blogger.com/profile/12777847277329079466noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-75108895290897359542022-09-02T18:18:01.863-07:002022-09-02T18:18:01.863-07:00Colin, I know its been a day or two since you wrot...Colin, I know its been a day or two since you wrote these comments, but I was wondering if you ever figured out a worthy substitute for the temperature sensing diodes on the thermal block. I too would like to use the cryocooler and its inherit control system. But effing up those diodes seems like a good way to halt that aspect of things, so im looking for an alternate plan, which would still allow for the temp sensing to work. Jayhttps://www.blogger.com/profile/12777847277329079466noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-26733416622741402472021-07-30T18:55:52.391-07:002021-07-30T18:55:52.391-07:00https://www.ebay.com/itm/265247947385?mkevt=1&...https://www.ebay.com/itm/265247947385?mkevt=1&mkcid=1&mkrid=711-53200-19255-0&campid=5338273189&customid=&toolid=10001&pub=5575378759&icep_ff3=1&ipn=psmain&icep_vectorid=229466&kwid=902099&mtid=824&kw=lg<br /><br /><br />Unit for salefrolenhttps://www.blogger.com/profile/00922682469649951128noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-43344555072537940582021-02-26T06:37:00.912-08:002021-02-26T06:37:00.912-08:00Ah.... good ol’ marketing spam! IGNORE THE ABOVEAh.... good ol’ marketing spam! IGNORE THE ABOVEnitroushttps://www.blogger.com/profile/00835344042274513990noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-1374398971015910042021-02-26T02:06:38.193-08:002021-02-26T02:06:38.193-08:00gasoline generator manufacturer<a href="https://www.zohoaoe.com/product-category/gasoline-generator/" rel="nofollow">gasoline generator manufacturer</a>Lucifer Smithhttps://www.blogger.com/profile/16661626872176676685noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-51180854908273022002020-09-03T12:17:02.769-07:002020-09-03T12:17:02.769-07:00i found on ebay a superlink rx but is descontinued...i found on ebay a superlink rx but is descontinued so i think to contact seller or contact lihan a cryocooler companymysteryhttps://www.blogger.com/profile/02787611814494821448noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-84888561072653067502020-09-02T09:36:45.358-07:002020-09-02T09:36:45.358-07:00I don't think you're going to see that kin...I don't think you're going to see that kind of deal at this point. Most often, these units are over $2k USD. Way out of my price range, but I lucked in a few years ago and got one for less than $1kNitroushttps://www.blogger.com/profile/18307703517124580433noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-62832395928860240452020-09-02T09:30:02.829-07:002020-09-02T09:30:02.829-07:00or 300 pleaseor 300 pleasemysteryhttps://www.blogger.com/profile/02787611814494821448noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-19660751097979237222020-09-02T09:25:57.337-07:002020-09-02T09:25:57.337-07:00Ben can you send a link for cryocooler less than 4...Ben can you send a link for cryocooler less than 400 pleasemysteryhttps://www.blogger.com/profile/02787611814494821448noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-55118426298382176272020-08-18T13:17:45.335-07:002020-08-18T13:17:45.335-07:00Any thoughts on the lack of heat sensor and close ...Any thoughts on the lack of heat sensor and close proximity of LNA to Dewar and repositioning of power to crypcooler to the other end?<br />Also , would the old software work with this unit? I am hesitant to pull it apart until I can check the operating stats. But it definitely works. Goes green after 6 hours. It powers up and runs well on 27V 5.6A, just a little slow at first. And what are the DIPS doing? presumably something with the LNA. Looks like heatsink is glued to cryopump so solvent should easily remove it. How would I interface with this unit?<br />I have many computers with RS232 cable, with windows 2000, XP, ME,2010 and maybe 2007. <br />Raul<br />https://www.dropbox.com/sh/cra8gge0764ummd/AABo1qci_lnJEw4W44OABDgBa?dl=0<br />Raul Ahttps://www.blogger.com/profile/11657024596568915462noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-49147543457321950062020-07-06T07:01:15.991-07:002020-07-06T07:01:15.991-07:00Thank you very much. TACIT works for me. My versio...Thank you very much. TACIT works for me. My version is of off xDevs article about it. Now I know my cooler is just pretty... broken. I'll try replacing the Helium see if that gets it going again. But thank you nonetheless. I'll take a look at your post about the program. It might be helpful when the cooler is refilled. Thanks!Anonymoushttps://www.blogger.com/profile/07840861548302014089noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-59990361470354700032020-07-02T09:01:53.220-07:002020-07-02T09:01:53.220-07:00I believe it depends on the app version, but the o...I believe it depends on the app version, but the one I used had the password TACIT . I did, however, put together a python program that could query/control the standard driver without the system status app (which had lots of JRE dependencies). If you're interested I could try and look it out.colintdhttps://www.blogger.com/profile/11573258337233231284noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-284575022253558782020-07-02T07:33:46.181-07:002020-07-02T07:33:46.181-07:00Hey there... I know I'm quite late to the part...Hey there... I know I'm quite late to the party, but I just got a Superlink RX from a local supplier and plan to use it just as you did. The only problem I still have is the password locked controls. I would like to use the original controler rather than a variac just because of saftey concerns. I was wondering if you could give me the password. I am no programmer or developer so de-compiling is no option for me... Normally I wouldn't ask, but I just spent like 1.2k on a cryocooler. I hope you are still around here and willing to share the password. Greetings, PhilippAnonymoushttps://www.blogger.com/profile/07840861548302014089noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-48375845720063001442020-06-30T06:24:06.765-07:002020-06-30T06:24:06.765-07:00I Just used JBWeld. Essentially an aluminium based...I Just used JBWeld. Essentially an aluminium based epoxy. super simple, fantastic thermal qualities, and no adverse heating of the cryocooler.<br />I now use an aquarium chiller to chill the unit, works amazing. ChristopherDhttps://www.blogger.com/profile/00314710455130702471noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-43554099126961222302020-06-08T13:35:38.813-07:002020-06-08T13:35:38.813-07:00I managed to find a scrap cryogenic gas purifier f...I managed to find a scrap cryogenic gas purifier for a KrF laser on ebay. Stripped the thing apart and I got a nice single stage GM cooler and the compressor. Some work required on the control system, but works nicely.<br /><br />I've since got hold of a 70W cooler on ebay and separately a suitable compressor. Currently working on the 1ph-3ph converter I need to run the thing!<br /><br />It takes time to find though, and careful use of search terms...colintdhttps://www.blogger.com/profile/11573258337233231284noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-63347517548039818472020-06-08T13:33:12.077-07:002020-06-08T13:33:12.077-07:00I had some Wood's metal to hand but no really ...I had some Wood's metal to hand but no really good thermal epoxy. The alloy also bonds nicely to the copper, and is reworkable with heat.colintdhttps://www.blogger.com/profile/11573258337233231284noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-83254806477664172322020-06-08T13:18:06.437-07:002020-06-08T13:18:06.437-07:00where did you source your 25 watt cooler?
Thanks
D...where did you source your 25 watt cooler?<br />Thanks<br />DougNitroushttps://www.blogger.com/profile/18307703517124580433noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-9551701972677577422020-06-08T12:57:12.832-07:002020-06-08T12:57:12.832-07:00two questions. First, when I get an email alert t...two questions. First, when I get an email alert that someone has commended on a project i'm following, I am never able to find the latest post. Is this a setting i've got screwed up?<br /><br />Second question actually related to the liquid nitrogen generator. Why screw around with Woods metal when there are great thermal conducting expoxies and pastes that can be used?<br /><br /><br />Nitroushttps://www.blogger.com/profile/18307703517124580433noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-44498358300816217412020-06-08T10:12:24.785-07:002020-06-08T10:12:24.785-07:00I pre-tinned the pipe using gentle torch heating a...I pre-tinned the pipe using gentle torch heating and a low temp SMD flux paste to get the Wood's metal to run (I think it was this https://www.amazon.co.uk/SMD291ST2CC6-Chip-Quik-SWATEE-ELECTRONICS/dp/B00HKJQ5P8 ), then did the same with the filed neck of the cooler (very gentle with the heat, and some SS wirebrushing to get it to take). <br /><br />Once both were tinned I wrapped the pipe tightly round the cooler, and used the torch to gentle heat areas enough to run in fillets of Wood's alloy (to get a good thermal contact). <br /><br />The key was to take your time (gentle heat, wait to get warm), the brush scraping to help the flux at the low temp, and to have a thick pair of leather gloves so you can handle the whole assembly when hot (I discovered the need for that the hard way!).<br /><br />Solder/fix one end of the coil, then work your way along building up fillets along the way.<br /><br />Overall nowhere near as tricky as I thought it might be, and the end result was a really good compact thermal contact. It got shelved for various reasons (not least moving up to a 25W GM cooler), but the next plan was to cover the cooling pipe in some PU foam to reduce dripping due to condensation. I might well go back to this one day soon as an energy efficient way to replace boiled off N2 from my 35L dewar (currently goes from full to empty in about 6months). colintdhttps://www.blogger.com/profile/11573258337233231284noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-84085105500284169092020-06-08T10:00:03.831-07:002020-06-08T10:00:03.831-07:00Hi Colin,
Thank you for your reply! I saw your pre...Hi Colin,<br />Thank you for your reply! I saw your previous comment in which you mentioned this, and I appreciate the updated link to the picture of your unit. Did you basically just melt quite a bit of Wood's metal onto the bare surface of the heat rejection area, then wrap the copper tubing around it and heat the area with a torch until the Wood's metal melted and joined the copper coil to the cryocooler?<br />Thanks,<br />BenAnonymoushttps://www.blogger.com/profile/04001356352437783047noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-38393752529936252542020-06-08T03:59:00.547-07:002020-06-08T03:59:00.547-07:00Back in 2015 I did something similar to what you s...Back in 2015 I did something similar to what you suggested, clipping off the old heatsink, filing down to the base metal, then tinned with Wood's metal, before finally soldering on a length of copper pipe. (You have to use Wood's metal, as the melting point of normal solder will damage the cooler.)<br /><br />Photo here: https://1drv.ms/u/s!AhvhJJW4_lUmgoIpw7fWZ3Dw38T-2Q?e=gWxHqn<br /><br />With this setup I get less than 2C difference between water temp and root thermistor temp (as reported in the controller), and I suspect the real value is less as my mapping of the response curve suggests it errs on the high side.colintdhttps://www.blogger.com/profile/11573258337233231284noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-70067799148098859052020-06-05T13:18:30.349-07:002020-06-05T13:18:30.349-07:00Ben,
Is there any chance you could provide some de...Ben,<br />Is there any chance you could provide some details on how you constructed the water-cooling manifold that replaces the copper-fin heat-sink in your design? From what I can see in your photos, it appears that you used a short length of some sort of tubing/hose material as a sleeve to slide over the cylindrical heat rejection area, clamped it above and below with hose clamps (and presumably further sealed it to the body of the cryocooler with epoxy or hot glue), and simply inserted hose barb adapters through the sides of the sleeve that serve as an inlet/outlet for the chilled water that you circulate around the heat rejection area. Is that an accurate assessment?<br />I have been working on duplicating your project for myself in my spare moments over the past 5 years or so, using a similar cryocooler extracted from an eBay-purchased Superfilter (the 2001 mfd Hybrid 98 model that runs on 120VAC, as mentioned by others in earlier comments). <br />Recently, I removed the air-cooled heat-exchange assembly from my unit, and had planned to replace it with a coil of copper tubing that wraps around the heat-rejection area, through which I could simply circulate cold water; however, I am slightly concerned that the copper coil (which I hand-wrapped around the heat rejection area) may not be in contact intimately enough with the cryocooler to facilitate efficient heat exchange. For that reason, I would imagine that the most ideal solution would be one in which the coolant (water) directly contacts and draws heat from the heat rejection area (i.e., rather than conducting the heat to a poorly-wrapped copper coil and removing it from the coil by circulating cold water through it). Unfortunately, I have found it quite challenging to come up with something to use in order to create a water-cooling jacket that will fit around the heat rejection area of the cryocooler and that will not leak (I have limited tools at my disposal). Consequently, I would really appreciate if you were able to offer some more details into the materials and method that you used to construct the water cooling manifold on your unit.<br />Regardless, thank you very much for all of the content you have provided on here, YouTube, and elsewhere. You do very interesting things and your work offers much from which to learn and be inspired.<br />Sincerely,<br />BenAnonymoushttps://www.blogger.com/profile/04001356352437783047noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-68226786189708084282020-03-12T09:51:23.219-07:002020-03-12T09:51:23.219-07:00Could you make this for saleCould you make this for saleMawahttps://www.blogger.com/profile/06629129190950843297noreply@blogger.comtag:blogger.com,1999:blog-401164737462963207.post-49409667954237764662020-03-11T02:43:48.431-07:002020-03-11T02:43:48.431-07:00Here I discovered various portions and now I am go...Here I discovered various portions and now I am going to utilize these new guidelines on <a href="https://www.1clicksmt.com/products/N2-Generator.html" rel="nofollow">N2 generator</a>.1Click SMThttps://www.blogger.com/profile/17991983422660986544noreply@blogger.com