RE: [Repeater-Builder] RG21AU CABLE

2010-03-26 Thread Eric Lemmon
@yahoogroups.com Subject: RE: [Repeater-Builder] RG21AU CABLE At 09:26 PM 24/03/2010, you wrote: Doug, From what I have found, RG-21A/U cable is 53 ohm impedance, 0.339 outer diameter, double silver-plated copper braid shields, and a solid center conductor of high resistance wire. The dielectric

RE: [Repeater-Builder] RG21AU CABLE

2010-03-26 Thread Doug
At 07:00 PM 26/03/2010, you wrote: I have finally tracked down a copy of the original RG-21A/U specification, and have posted it in the Files section of this Group, in the Coaxial Cable folder. RG-21A/U became official on 07 September 1955, as MIL-C-17/14. Then, RG-21A/U was replaced by RG-222/U,

Re: [Repeater-Builder] RG21AU CABLE

2010-03-25 Thread Burt Lang
The high resistance wire is nichrome. As I recall its attenuation is around 20 dB/100ft at 2m. I built an attenuator using it about 35 years ago. It handled the maximum power rating of the coax as long as the first 10 ft from the input was well spread out to prevent build up of heat. There

Re: [Repeater-Builder] RG21AU CABLE

2010-03-25 Thread Doug
At 06:42 AM 25/03/2010, you wrote: The high resistance wire is nichrome. As I recall its attenuation is around 20 dB/100ft at 2m. I built an attenuator using it about 35 years ago. It handled the maximum power rating of the coax as long as the first 10 ft from the input was well spread out to

[Repeater-Builder] RG21AU CABLE

2010-03-24 Thread Doug
Can someone tell me what the characteristics of this cable are. I tried google and it didn't seem to know.. I sort of think it might be a lossy coax but not sure. Thanks Doug

Re: [Repeater-Builder] RG21AU CABLE

2010-03-24 Thread Kris Kirby
On Wed, 24 Mar 2010, Doug wrote: Can someone tell me what the characteristics of this cable are. I tried google and it didn't seem to know.. I sort of think it might be a lossy coax but not sure. http://www.rfparts.com/coax_specs_rg.html -- Kris Kirby, KE4AHR Disinformation Analyst

Re: [Repeater-Builder] RG21AU CABLE

2010-03-24 Thread Doug
At 08:35 PM 24/03/2010, you wrote: On Wed, 24 Mar 2010, Doug wrote: Can someone tell me what the characteristics of this cable are. I tried google and it didn't seem to know.. I sort of think it might be a lossy coax but not sure. http://www.rfparts.com/coax_specs_rg.html -- Kris Kirby,

RE: [Repeater-Builder] RG21AU CABLE

2010-03-24 Thread Eric Lemmon
-Builder] RG21AU CABLE At 08:35 PM 24/03/2010, you wrote: On Wed, 24 Mar 2010, Doug wrote: Can someone tell me what the characteristics of this cable are. I tried google and it didn't seem to know.. I sort of think it might be a lossy coax but not sure. http://www.rfparts.com