Topband: Beverage Feed-line Noise Pickup

[Herbert Schoenbohm]

On my Beverage feed-line RG6 runs (some 200 feet) I use multi-turns a 
large toroid on each feed-line and the attach each coax to a grounding 
block and good ground rods (typical Hume Depot RG-6 variety)  then on 
the other side of the grounding block before the coax runs about 20 feet 
to the Beverage Switch I have another large wound 13 turn toroid.  I 
have since learned that I probably have all my feed-line noise 
suppression stuff in the wrong place and that the equipment side toroids 
are probably useless anyway.  Now I am told that this noise pickup 
suppression stuff needs to be out by the actual Beverage feed and about 
20-30 feet away.  The reasoning is that the noise pickup by the 
feed-line needs to be blocked from coupling into the antenna itself.  Is 
this true?


I am starting to move the toroid-ground-toriod RG-6 "T" combos out 
closer to the antennas.  I noticed that DX-Engineering sells an RFCC-1 
box designed for Beverage coax runs but suggests it be place about 20 to 
30' from the Beverage feed which has it's own separate ground rod.  I 
bought one and before I put it out near the Beverage feed I thought I 
would it in place of the toroid system near the shack on one of the 
Beverage feedlines.  However when I grounded the unit to the Beverage 
ground system near the shack I immediately noticed the noise floor jump 
up by about 10 db.  I now know it is in the wrong place but this test 
with the DXE RFCC-1 may prove something of interest.  Please correct my 
assumption if it is wrong:  Noise pickup from long Beverage feed-lines 
flows back toward the Beverage feed point and then it is  coupled via 
the feed point transformer back down the center conductor to the 
receiver.   If this is true I will remove all toroids at the house and 
put them out near  Beverage feed points (about 30 feet away with  
separate grounds based on the advice I receive back from this post.


Please let me know what you think about this.

Herb Schoenbohm. KV4FZ