You're going to have to explain that some more for it to make any
sense. The total cable loss for 200 feet of RG-213 at 7 MHz is about 1
db. It seems to me that you'd have to have some really horrible
impedance mismatches for the difference between RG-213 and LDF4 to even
be noticeable.
The best clue that something is skewed, though, is your comment that the
noise floor changes a bunch and the signal level not so much. That
sounds like a termination problem of some sort, or more likely some kind
of open shield in the RG-213.
73,
Dave AB7E
On 5/13/2014 6:55 AM, Edward Sawyer wrote:
Personally, I use my beverages extensively on 40 - 160M and the 200 ft of
low loss cable would be really important.
Also, not sure if you have ever tried this experiment: Preamp at the radio
(mine is 20dB for 160 - 20M), 200 ft of RG213 vs 200 ft of LDF4 to a long
beverage (mine is 2 x 1000ft terminated to EU). It's a game changing
difference on noise floor and a little of an add on signal strength. Most
people have the pre-amp off and are satisfied that they hear some noise
floor and therefore the loss doesn't matter. But kick I a preamp and you
have often over half of than in noise floor - but I have found that much of
what you are hearing is the cable, not the beverage itself - if the
conditions are not super noisy (like summertime).
Try it. You might be surprised.
73
Ed N1UR
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