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a crisco can works well
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KC8QJP wrote:
a crisco can works well Sometimes you can get empty paint cans at professional paint supplies stores. They are nice as they are clean and shiny. John W3JXP |
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On Jan 1, 10:15*am, John Passaneau wrote:
KC8QJP wrote: a crisco can works well Sometimes you can get empty paint cans at professional paint supplies stores. They are nice as they are clean and shiny. John W3JXP the poster is who also uses in his impersonation of other people. He does this because he wants to be gay with ham operators and they have spurned him. |
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"John Passaneau" wrote in message ... KC8QJP wrote: a crisco can works well Sometimes you can get empty paint cans at professional paint supplies stores. They are nice as they are clean and shiny. John W3JXP Thanks for the tip! |
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"Dave" wrote in message ... KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X http://image.lotte.com/lotte/images/...02/7266434.jpg |
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On Thu, 01 Jan 2009 17:41:27 +0000, Dave wrote:
KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? Or, what's an acceptable substitute? -- -fb- |
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On Thu, 01 Jan 2009 13:22:44 -0600, funkbastler wrote:
Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? Or, what's an acceptable substitute? Here's The Answer: http://tinyurl.com/22c6t and he http://tinyurl.com/a3mk6j |
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On 1 Jan 2009 20:16:28 GMT, Spamm Trappe wrote:
On Thu, 01 Jan 2009 13:22:44 -0600, funkbastler wrote: Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? Or, what's an acceptable substitute? Here's The Answer: http://tinyurl.com/22c6t heh heh... that URL seems to be down. I did google it (froogled it, actually)... don't need a 55-gallon drum of the stuff, or any Transformer "action figures." and he http://tinyurl.com/a3mk6j Thanks. -- -fb- |
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On Jan 1, 7:15*am, John Passaneau wrote:
KC8QJP wrote: a crisco can works well Sometimes you can get empty paint cans at professional paint supplies stores. They are nice as they are clean and shiny. John W3JXP Paint the Can Flat Black and you will have a "Stealth CanTenna". Paint the Can with Invisiable Paint and you just may never see it again. |
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KC8QJP wrote:
"Dave" wrote in message ... KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X http://image.lotte.com/lotte/images/...02/7266434.jpg http://www.tcpglobal.com/autobodydep...mNo=CAN+GALLON |
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On Jan 1, 2:22*pm, funkbastler wrote:
On Thu, 01 Jan 2009 17:41:27 +0000, Dave wrote: KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? *Or, what's an acceptable substitute? -- -fb- I havent bought any in a long time but the local drug store used to sell mineral oil by the gallon. The gallon I bought was about $12 USD about 20 years ago. Lately I havent seen anything larger than a quart.My wife has a 12 oz bottle she picked up at the dollar store for $.97, that may be a good way to go. I know a guy that used "Marvel Mystery Oil" which is mostly mineral oil. He says the can will rust out will regular mineral oil but not with the MMO. Jimmie |
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funkbastler wrote:
On Thu, 01 Jan 2009 17:41:27 +0000, Dave wrote: KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? Or, what's an acceptable substitute? Mineral oil from the drug store. |
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funkbastler wrote:
On Thu, 01 Jan 2009 17:41:27 +0000, Dave wrote: KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? Or, what's an acceptable substitute? Mineral Oil (available at your local drug store). |
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KC8QJP wrote:
a crisco can works well When length/dia ratio of the waveguide is optimum, 31mm ant, proper distance from ant-feed to back of can--the most bang for the size/buck ... Regards, JS |
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John Smith wrote:
KC8QJP wrote: a crisco can works well When length/dia ratio of the waveguide is optimum, 31mm ant, proper distance from ant-feed to back of can--the most bang for the size/buck ... Regards, JS http://www.eham.net/forums/Elmers/1574 |
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Dave wrote:
... http://www.eham.net/forums/Elmers/1574 Uh, yeah, I guess your reference to a dummy load is helpful, in some other reality ... Regards, JS |
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"John Smith" wrote in message
... Dave wrote: ... http://www.eham.net/forums/Elmers/1574 Uh, yeah, I guess your reference to a dummy load is helpful, in some other reality ... I was just happy to see someone in that thread pop up with the warning about PCBs in old transformer oil. I couldn't believe someone said they actually got power company transformer oil! |
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Transformer oil. Try your local power company. typically they will either sell it to you, or, sometimes when they find out that you only need a gallon or so, they'll just give it to you. Mine did. - 'Doc |
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On Jan 1, 6:48*pm, "Bob Campbell" wrote:
"John Smith" wrote in message ... Dave wrote: ... http://www.eham.net/forums/Elmers/1574 Uh, yeah, I guess your reference to a dummy load is helpful, in some other reality ... I was just happy to see someone in that thread pop up with the warning about PCBs in old transformer oil. * I couldn't believe someone said they actually got power company transformer oil! Nothing wrong with PoCo oil. They havent used PCBs in years. We use the same stuff at work made by Shell . Its just mineral oil with a few additives. Jimmie |
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On Jan 1, 8:12*pm, funkbastler wrote:
On Thu, 1 Jan 2009 15:49:11 -0800 (PST), wrote: Transformer oil. Try your local power company. *typically they will either sell it to you, or, sometimes when they find out that you only need a gallon or so, they'll just give it to you. *Mine did. - 'Doc You still on West Madison? -- -fb- I usually come across about 70 gallons of used oil every couple of years but I dont have any now. I may have some by July. Jimmie |
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"JIMMIE" wrote in message
... Nothing wrong with PoCo oil. They havent used PCBs in years. We use the same stuff at work made by Shell . Its just mineral oil with a few additives. That's good to know. |
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John Smith wrote:
... No one knows about silicone oils? Break down is a few hundreds of degrees, good thermal conductivity, ... benign to all components, including any gaskets, I can possibly think of, etc. Also, if you are into health/toxic concerns, purchase a food grade ... Regards, JS Actually, I don't know why anyone would use or suggest the use of anything but silicone. You can tear the case off your TV/radio, sit the chassis down in an aquarium full of the stuff, turn it on and watch it! Pull it out, remove the silicone, put it back in its' case and expect it to go to live expectancy, or beyond ... Try that with anything else ... Regards, JS |
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John Smith wrote:
... Actually, I don't know why anyone would use or suggest the use of anything but silicone. You can tear the case off your TV/radio, sit the chassis down in an aquarium full of the stuff, turn it on and watch it! Pull it out, remove the silicone, put it back in its' case and expect it to go to live expectancy, or beyond ... Try that with anything else ... Regards, JS Indeed, if you are using food grade, you might be able to take a tablespoon or two for constipation--heck, a few here could use that ... ROFLOL Regards, JS |
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Way too inductive. The MFJ is a steal at $50
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Jim-NN7K wrote:
funkbastler wrote: On Thu, 01 Jan 2009 17:41:27 +0000, Dave wrote: KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? Or, what's an acceptable substitute? Mineral Oil (available at your local drug store). Just be prepared for some strange looks when you purchase a gallon of mineral oil all at once. :-O |
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KC8QJP wrote:
"Dave" wrote in message ... KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X http://image.lotte.com/lotte/images/...02/7266434.jpg A Crisco can has a plastic top. You want a new paint can with a metal top. Dave WD9BDZ |
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Bob Campbell wrote:
"John Smith" wrote in message ... Dave wrote: ... http://www.eham.net/forums/Elmers/1574 Uh, yeah, I guess your reference to a dummy load is helpful, in some other reality ... I was just happy to see someone in that thread pop up with the warning about PCBs in old transformer oil. I couldn't believe someone said they actually got power company transformer oil! Why should you be surprised about power company oil. They haven't had PCB's for years. Even the pole pigs have clean (?) oil in them. Dave WD9BDZ |
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"John Smith" wrote in message
... wrote: Transformer oil. Try your local power company. typically they will either sell it to you, or, sometimes when they find out that you only need a gallon or so, they'll just give it to you. Mine did. - 'Doc No one knows about silicone oils? Break down is a few hundreds of degrees, good thermal conductivity, ... benign to all components, including any gaskets, I can possibly think of, etc. Also, if you are into health/toxic concerns, purchase a food grade ... Regards, JS Silicone oils are excellent from a health standpoint and usually very good from a flammability standpoint. However, the Cantenna relies on natural convection of the oil for cooling and the higher viscosity of commonly available silicone oils will limit the power handling capability of the Cantenna. Remember that the Cantenna must be de-rated when used for long duty cycles, and a high viscosity oil will lower the power rating still more. Also remember that silicone oils are not cheap (and my buddy at Dow would only send me small samples). I would suggest using modern RF terminations made by Bourns and other companies. These are designed to be bolted to a large heatsink. The CHF9838CNF series is rated for 50 ohms, 250 watts, VSWR below 1.1 from DC to 2.2 GHz. It only costs $27.50 in single lot quantities. I think this is higher than the continuous rating of the Cantenna. I don't know for sure as I disposed of my Cantenna years ago. Digi-Key sells these Bourns terminations if you want one. I had used transformer oil given to me by the local electric cooperative. I didn't learn until a few years later that the oil was contaminated with Aroclor, a PCB oil. Proper disposal was easy for me as I then worked in the research labs of a major chemical company that had an EPA licensed incinerator specifically rated for PCB destruction. Even so, I had to repackage the oil into special disposal bottles and give the incinerator operators instructions that only one of the bottles could be burned daily. Before anyone asks can they send their oil to me for disposal, I left that company over 10 years ago and am now retired, so the answer will be no. I did quite a bit of research on trade names of PCB containing oils. In fact, the EPA's list found at http://www.epa.gov/epawaste/hazard/t...bs/aroclor.htm is partly a result of my study. About a third of the trade names on this list were unknown to the EPA until I provided them to the Atlanta EPA office. Barry L. Ornitz, PhD WA4VZQ |
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funkbastler, To the best of my knowledge, yes. - 'Doc ....I'm afraid to ask... |
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John Smith wrote:
John Smith wrote: ... No one knows about silicone oils? Break down is a few hundreds of degrees, good thermal conductivity, ... benign to all components, including any gaskets, I can possibly think of, etc. Also, if you are into health/toxic concerns, purchase a food grade ... Regards, JS Actually, I don't know why anyone would use or suggest the use of anything but silicone. You can tear the case off your TV/radio, sit the chassis down in an aquarium full of the stuff, turn it on and watch it! Pull it out, remove the silicone, put it back in its' case and expect it to go to live expectancy, or beyond ... Try that with anything else ... Regards, JS The word "overkill" leaps to mind. |
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NoSPAM wrote:
I would suggest using modern RF terminations made by Bourns and other companies. These are designed to be bolted to a large heatsink. The CHF9838CNF series is rated for 50 ohms, 250 watts, VSWR below 1.1 from DC to 2.2 GHz. It only costs $27.50 in single lot quantities. ...Digi-Key sells these Bourns terminations if you want one. Thanks, Doc. That's News I Can Use. |
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Erich wrote:
Jim-NN7K wrote: funkbastler wrote: On Thu, 01 Jan 2009 17:41:27 +0000, Dave wrote: KC8QJP wrote: a crisco can works well http://www.mfjenterprises.com/Produc...uctid=MFJ-250X Where's a good place to find transformer oil (besides at the top of the utility pole outside the house)? Or, what's an acceptable substitute? Mineral Oil (available at your local drug store). Just be prepared for some strange looks when you purchase a gallon of mineral oil all at once. :-O Is motor oil a conductor? |
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Mineral Oil (available at your local drug store).
Just be prepared for some strange looks when you purchase a gallon of mineral oil all at once. :-O Is motor oil a conductor? Might burn and sludge up your resistor. Lots of additives you just don't need. I had a cantenna for 20 years with light mineral oil. there was a little seepage to the top of the lid through the vent. I actually had transformer oil but never used it because of the thought of that stuff seeping. It really is a lot cleaner. Check feed stores, Vet supply stores, paint stores, hardware. Check this out: http://www.pugetsystems.com/submerged.php |
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On Jan 2, 10:23*am, "JB" wrote:
* Mineral Oil (available at your local drug store). Just be prepared for some strange looks when you purchase a gallon of mineral oil all at once. :-O Is motor oil a conductor? Might burn and sludge up your resistor. *Lots of additives you just don't need. I had a cantenna for 20 years with light mineral oil. *there was a little seepage to the top of the lid through the vent. *I actually had transformer oil but never used it because of the thought of that stuff seeping. *It really is a lot cleaner. *Check feed stores, Vet supply stores, paint stores, hardware. *Check this out:http://www.pugetsystems.com/submerged..php One mistake I made with a cantenna was letting it sit on a concrete floor. The bottom of the can rusted through from the outside. The replacement can got a good coating of zinc chromate primer, followed wirh red oxide, then acrylic enamel auto paint. Jimmie |
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One mistake I made with a cantenna was letting it sit on a concrete
floor. The bottom of the can rusted through from the outside. The replacement can got a good coating of zinc chromate primer, followed wirh red oxide, then acrylic enamel auto paint. Jimmie Mine was always inside and never rusted. I have seen them rust outside though. I put mine in a tray, worrying about seepage getting on the carpet but it would only pool up on the top. Might be worthwhile to shoot the new can with BBQ paint. |
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NoSPAM wrote:
... Silicone oils are excellent from a health standpoint and usually very good from a flammability standpoint. However, the Cantenna relies on natural convection of the oil for cooling and the higher viscosity of commonly available silicone oils will limit the power handling capability of the Cantenna. Remember that the Cantenna must be de-rated when used for long duty cycles, and a high viscosity oil will lower the power rating still more. Also remember that silicone oils are not cheap (and my buddy at Dow would only send me small samples). ... unknown to the EPA until I provided them to the Atlanta EPA office. Barry L. Ornitz, PhD WA4VZQ Well, yeah ... However, the last silicone oil I purchased was at an auction. I was a cannery being close, about 2-3 years ago. It was a 5 gal. tin, seems to be about 10w-15w (no zahn cup to even begin guessing viscosity with); it was $20.00, if I remember correctly. (a lucky fluke, I admit, and food grade to boot!) However, if I had to choose a 2nd, easily available source, and cheap, I would get some pint bottles of 100% silicone spray used for protecting seats, dashboards, panels, etc. in autos. At $1.88 + tax--a pint, a gallon would be under $20.00. And, again, a cheap easily available source to all--without shipping costs ... Presently, I used the auctioned silicone I purchased, on my car interior, tires, etc. ... lol You know, if everyone has so many problems in doing the simplest things, makes one wonder what they do when they hit a real snag! scratches-head Regards, JS |
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Barry L. Ornitz, PhD WA4VZQ wrote: Silicone oils are excellent from a health standpoint... John Smith wrote: However, the last silicone oil I purchased was at an auction... and food grade to boot!) I am a bit puzzled. IIRC, the silicone in women's breast implants would/could/did leak and cause fairly serious health problems. Yet, Dr. Ornitz says "Silicone oils are excellent from a health standpoint" and Mr. Smith says: "food grade". Could anyone take a shot at explaining this apparent dichotomy? Inquiring minds want to know. |
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