Hello Dave and Group,
I had responded directly to Martin and will include my comments to him. Right now I hesitate to pull the tape off the coax at the XFRM but will do that ASAP to check it out. When I took it off the old spool it had not been used but it is donated to me from a junk yard lot. I also got a 4 foot spool nearly full of 1/2" hardline I'm planning on replacing my ground run of LMR-400 with. 75 ohm but it should work if I can build the connections to the LMR-400 PL-259's, etc. Disconnecting the ground as well as the BOG (in this case) from the XFRM causes the noise to drop down to about S-1 to S-2. With ground connected to the XFRM I get about S-5 noise level without any antenna. Per my note to Martin you can read my other test. Right now with the 550-600 ft. beverage hooked up along with ground of course, I get S-5 noise level and can't hear an S-9+10 over signal on 7.235 Mhz. Terry KI7M ---------------- Hi Martin, I will perform some checks and let you know. The beverage is plugged into RX IN jack like it should be. I just removed the Array Solutions Front End Protector and that seemed to make the noise floor lower on AM band. I was able to pick up signal perhaps a little better. Not the best time to be testing right now at 10:30 AM for these bands of course. But in checking on 80 mtrs I found an SSB signal on 3947 KHz and checked that. An S9+10 signal can't be heard when I switch in the RX BOG. I background goes from S-6 up to S-7 when i switch the RX in? The XFMR is the one with the SO-239 for the coax which of course is the right one. I have tried beverage and ground swapped both ways on the two 'butterfly' connections. I will switch back to the 550-600 north beverage from the BOG and do some more checking later. Terry KI7M > On January 13, 2018 at 10:19 AM David Olean wrote: > > > Hello Terry > > I would suspect the coax could be bad. Is it new or has it been laying > around awhile.? I have had water get into flooded RG-6 coax, and with > all the metals associated with the shielding, the corrosion has produced > a battery effect and there is DC voltage there as read on a high > impedance DVM. Of course the coax produced copious amounts of noise as > well. Critters had chewed on the new coax to allow water entry. You > can test the cable with an antenna analyzer or even a DVM. You should > see no leakage between conductors. If there is any resistance showing, > you have a problem. If you disconnect the beverage at the far end, the > noise should drop to zero with just the coax connected. If you hear > noise, it is coming in on the coax or is being generated within the > coax. Good luck and I hope you find the problem. > > Dave K1WHS > > > On 1/13/2018 5:00 PM, [email protected] > mailto:[email protected] wrote: > > > > Send Topband mailing list submissions to > > [email protected] mailto:[email protected] > > > > To subscribe or unsubscribe via the World Wide Web, visit > > http://lists.contesting.com/mailman/listinfo/topband > > or, via email, send a message with subject or body 'help' to > > [email protected] mailto:[email protected] > > > > You can reach the person managing the list at > > [email protected] mailto:[email protected] > > > > When replying, please edit your Subject line so it is more specific > > than "Re: Contents of Topband digest..." > > > > > > Today's Topics: > > 1. Re: My beverage only hears static? (Martin) > > > > > > --------------------------------------------- > > > > Message: 1 > > Date: Sat, 13 Jan 2018 16:12:29 +0100 > > From: Martin > > To: [email protected] mailto:[email protected] > > Cc: [email protected] mailto:[email protected] > > Subject: Re: Topband: My beverage only hears static? > > Message-ID: > > Content-Type: text/plain; charset=utf-8; format=flowed > > > > No matter where the beverage points to, terminated or not, hearing > > only > > s5 static just seems not right to me. > > Did you connect your antenna to RX IN (not OUT) ? What XFMR do you > > use? > > Grounded the coax at the feedpoint by accident? What happens when > > you > > leave the frontend protector out of the setup? Will your K3 pick up > > signals when you connect your TX-antenna to RX IN? > > > > 73, Martin > > > > > > Am 13.01.2018 um 15:16 schrieb [email protected] > > mailto:[email protected] : > > > > > > > Message: 8 > > > Date: Fri, 12 Jan 2018 12:44:25 -0800 (PST) > > > From: terry burge > > > To:[email protected] mailto:[email protected] , > > > terry burge > > > Subject: Topband: My beverage only hears static? > > > Message-ID:<[email protected] > > > mailto:[email protected] .com> > > > Content-Type: text/plain; charset=UTF-8 > > > > > > Hi folks, > > > > > > > > > I put up my first beverage recently. It's about 550-600 feet > > > of 17 gauge electric fence wire running to the north about 6-7 feet high. > > > Not terminated right now but using a beverage transformer I purchased on > > > qth.com and have not put on the termination yet. Using a 5' galvanized > > > ground rod at the transformer and 75 ohm RG-6 surplus I got about 35 feet > > > to my K-3 Elecraft thru an Array Solutions frontend protector to the RX > > > antenna connection. > > > > > > > > > All I get is S-5 static on the beverage. Even the strong > > > stations barely make a ripple of noise. Is this right? > > > > > > > > > I added some clamp on ferrites to see if the Common Mode > > > Noise would be cut down but after putting 5 on the RG-6 coax there is no > > > difference. Just that S-5 static level on any band 80/40/20/etc. Right > > > now I'm listening to P49MR on 14.250.0 Mhz and his 57 signal does not > > > even come thru on the beverage when I switch to RX antenna? > > > > > > > > > Terry > > > > > > KI7M > > > > > > > > > > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband
