On 6/14/2011 10:00 AM, Jim Lux wrote:
> On 6/14/11 6:50 AM, Rob Atkinson wrote:
> A run of RG213 of only 100 feet can provide a surprising amount
>> of loss on 1.8 MHz to a matched load--the best possible
>> conditions--and a dB here and there and it starts to add up.
>
> <0.25 dB for 100ft of Belden 8267 (an RG-213 type), LMR 400 is 0.162 dB
>
> RG-58 type (solid dielectric) is about twice that. LMR240 is 0.36dB
Although a tad off topic, I would add that I've found the CNT240 and
LMR240 to be very fragile compared to the more flexible 8X and larger
cables.
I used to swear by them, now I swear at them. <:-))
73
Roger (K8RI)
> low density dielectric helps a bit, but you'd have to decide whether .1
> dB for 100 ft is worth it. (goes up as sqrt of frequency.. at 30 MHz,
> the RG213 is at 1.1 dB/100ft)
> _______________________________________________
>
>
>
> _______________________________________________
> TowerTalk mailing list
> TowerTalk@contesting.com
> http://lists.contesting.com/mailman/listinfo/towertalk
>
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|