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#1
January 30th 07, 02:03 PM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
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#2
January 31st 07, 02:38 AM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
In article ,
David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. -- Telamon Ventura, California |
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#3
January 31st 07, 08:38 AM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
On Jan 30, 6:38 pm, Telamon
wrote: In article , David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. -- Telamon Ventura, California Telamon - That is true. -but- Most so called "MLBs" Magnetic Longwire Baluns are just such 'common ground' Matching Transformers. iane ~ RHF |
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#4
January 31st 07, 07:47 PM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
On Jan 31, 3:38 am, "RHF" wrote:
On Jan 30, 6:38 pm, Telamon wrote: In article , David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. -- Telamon Ventura, California Telamon - That is true. -but- Most so called "MLBs" Magnetic Longwire Baluns are just such 'common ground' Matching Transformers. iane ~ RHF . . . . Unless they have changed the internal wiring since 2001, the primary and secondary are completly isolated. MC transformers are NOT a good choice for 'high" RF field locations. I don't know eaxctly at what point it happens, but I ran into big problems with 2nd harmonic distortion when I added a ground ring around my home to my ~70' wire antenna. I also expereinced a number of mix porducts. 1240+770, 1240-770 1240+2(770) etc. MiniCircuit transformers are nice and compact,but the very small size of the ferrite core limits the voltage because the micro cores saturate. There are many reports of MC transfomres getting zapped by static. I never had that problem but the IMD was a serious issue. Wind you own on a suitable core. Terry |
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#6
February 1st 07, 03:00 AM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
In article .com,
"RHF" wrote: On Jan 30, 6:38 pm, Telamon wrote: In article , David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. -- Telamon Ventura, California Telamon - That is true. -but- Most so called "MLBs" Magnetic Longwire Baluns are just such 'common ground' Matching Transformers. iane ~ RHF That's OK for a horizontal wire 10 foot off the ground but if it is a Beverage or inverted L for instance then you would start near ground and you could take advantage of separate grounds. -- Telamon Ventura, California |
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#7
February 1st 07, 03:58 AM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
On Tue, 30 Jan 2007 18:38:38 -0800, Telamon
wrote: In article , David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. Here ya go, Sparky! http://www.minicircuits.com/products...rmers_pic.html |
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#8
February 2nd 07, 01:58 AM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
In article ,
David wrote: On Tue, 30 Jan 2007 18:38:38 -0800, Telamon wrote: In article , David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. Here ya go, Sparky! http://www.minicircuits.com/products...rmers_pic.html I'm well familiar with the Mini-circuits site. I have used their components in the past. -- Telamon Ventura, California |
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#9
February 2nd 07, 04:04 AM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
On Fri, 02 Feb 2007 01:58:47 GMT, Telamon
wrote: In article , David wrote: On Tue, 30 Jan 2007 18:38:38 -0800, Telamon wrote: In article , David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. Here ya go, Sparky! http://www.minicircuits.com/products...rmers_pic.html I'm well familiar with the Mini-circuits site. I have used their components in the past. What about the rest of the viewers? |
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#10
February 2nd 07, 04:09 AM
posted to rec.radio.shortwave
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Long wire to SO-239 50 ohm?
On Feb 1, 8:04 pm, David wrote:
On Fri, 02 Feb 2007 01:58:47 GMT, Telamon wrote: In article , David wrote: On Tue, 30 Jan 2007 18:38:38 -0800, Telamon wrote: In article , David wrote: http://www.minicircuits.com/pdfs/T8-1-X65.pdf http://www.minicircuits.com/pdfs/T14-1-X65.pdf You do not have the option of isolating the grounds on either model, which would ordinarily be an advantage of the voltage type of transformer. Here ya go, Sparky! http://www.minicircuits.com/products...rmers_pic.html I'm well familiar with the Mini-circuits site. I have used their components in the past. What about the rest of the viewers?- Hide quoted text - - Show quoted text - David & Telamon, Now now children be nice to each other. jftfoi ~ RHF |
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