Mark Although I am using the RF Parts relay on transmit verticals they work great. They are 12 volt DC coils and are marked so on the relay. I test checked mine with a little 9 volt battery and pulls great.In the advertisement blog it says " Rated coil voltage VDC: 26.5 " This is an advertising error.
https://www.rfparts.com/vhc3-12v.html [1] 73Bruce-k1fz -----------------------------------------From: "Mark K3MSB" To: "CUTTER DAVID" Cc: "Rob Atkinson", "TopBand List", "Guy Olinger K2AV" Sent: Thursday July 25 2019 7:59:32AM Subject: Re: Topband: RFI on TB I’d be interested in hear about this also. I’ve always used ground radials for my INV-L but this year I’d like to try an FCP. I’ve read that the INV-L as well as the FCP need to be floated during receive, which means two relays at the INV-L. 73 Mark K3MSB On Thu, Jul 25, 2019, 4:11 AM CUTTER DAVID via Topband < topband@contesting.com> wrote: > Guy > Slightly OT, but how do you deal with re-radiation from your inverted L? > I'm about to erect one of your inverted L on FCP and my rx loops are about > 50m away in the other corner of the field. Is that far enough? > David G3UNA/G6CP > > > On 24 July 2019 at 07:13 Guy Olinger K2AV wrote: > > > > > > I gotta agree with Rob. An inverted L aerial wire will hear ALL the noise > > that is around. Mine sure does. RX antenna will help enormously if there > is > > a place to put one that does not get the noise second hand off the L. Not > > enough room? A bit complicated, but "repeated" noise off the L can be > dealt > > with. > > > > The worst noises around here heard on my L were all repaired by the power > > company. The nastiest noise was very hard to find, I actually never > "found" > > it by looking for it. Noise turned out to be from a bad splice in an > > underground 13 kV cable going from the 13 kV delta overhead out on US 64 > to > > the transformer for my eastern neighbor and next house over. It would > come > > and go with extended cold weather, but never would correlate to sunlight > or > > darkness. I would hear it next to my transformer walking around with my > > battery K2 and a rubber ducky. It would never locate to up on a pole > (only > > power noise that didn't). > > > > Finally the splice hard-arced, exploding the fuse up on the pole for the > > neighbor's 13 kV feed, and taking those two houses off the grid. The > noise > > went away with the cannon shot noise. Blessed quiet on 160 and 80. I had > > put up with that for almost four years. > > > > In the end, Duke Energy completely reran his AND my buried 13kV lines, > and > > replaced his transformer. 35 years in the ground, 35 year old cable > design > > and materials, and deficient in THEIR opinion. Was really fun to watch > them > > use this super-neat burrowing setup that went right UNDER the woods and > the > > creek (whole other story). Now I can hear the lesser noises on my L from > > all over Apex and Cary :>) Need RX antenna for sure. That way I don't > have > > to listen to the Cary, NC noise (NE) at the same time as the generally > > closer and louder Apex, NC noise (S, SE). > > > > 73, Guy K2AV > > > > On Tue, Jul 23, 2019 at 9:37 AM Rob Atkinson > wrote: > > > > > > Over past few months, I have picked up an S5-S7 noise signature on > my TB > > > inv > > > > L antenna with K2AV FCP system. > > > > > > I would not use an inverted L for receiving. Unusable for rx at my > > > QTH but FB for transmitting. > > > > > > 73 > > > Rob > > > K5UJ > > > _________________ > > > Searchable Archives: http://www.contesting.com/_topband [2] - Topband > > > Reflector > > > > > _________________ > > Searchable Archives: http://www.contesting.com/_topband [3] - Topband > Reflector > _________________ > Searchable Archives: http://www.contesting.com/_topband [4] - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband [5] - Topband Reflector Links: ------ [1] https://www.rfparts.com/vhc3-12v.html [2] http://www.contesting.com/_topband [3] http://www.contesting.com/_topband [4] http://www.contesting.com/_topband [5] http://www.contesting.com/_topband _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector