Hi Ron,
700-1200 foot spacing should provide good in-band receiving capability. SDR receivers won't work for in-band receive, you must use a traditional transceiver such as the K3, K4HD, FTdx5000, IC-7800 etc. Micro-arcing is caused by transmitted RF jumping a spark gap. Any metal-to-metal joint that isn't securely bonded is a candidate for micro-arcing. 73 Frank W3LPL ----- Original Message ----- From: "Ron WV4P" <[email protected]> To: "Mail 10" <[email protected]> Cc: "160" <[email protected]> Sent: Wednesday, August 19, 2020 8:03:34 PM Subject: Re: Topband: Rohn 25 Vertical questions. Thanks for all the replies and willingness to share hard earned wisdom. Tim, When you say "May cause noise" Is that on TX ? or ? I am setting the antenna up to run the 4 parasitic elements like yours, but it will be phase 2 as the radials for them elements will be tricky on my very unlevel terrain. Frank, I do anticipate the use of an inband station although it's not likely to be utilized much I would not think. All RX will be on a mix of Beverages, rx vertical arrays and loops 700 - 1200 foot from the TX tower. I am a welder, but I can't foresee any safe / reliable way of attaching anything to Rohn 25. Maybe putting lugs on each of the 5/16 bolts and running an unbroken #6 copper up each leg and bonding together at the top. A lot of effort for a likely minimal if any change in scores though. Ron, WV4P On Wed, 19 Aug 2020 at 03:56, Mail 10 <[email protected]> wrote: > I am planning a similar installation, using Deeco mast sections (6' x > 10"). I have 20 of these, used of course. I don't think they have been > manufactured for decades. Sections interface with pin and socket, with 3 > x 1/2" bolts between plates on each end. > > Will also be strapping across the joints, as I know what a PITA > intermittent connections are. > > It will be a radiating mast with no other antennas on top, apart from a > parallel wire for 80 m operation. > > Erection won't commence until at least later in Spring, as the ground is > just so wet now, after one of the wettest years we've had. > > 73, Luke VK3HJ > > On 19/08/2020 4:06 am, Ron WV4P wrote: > > Howdy All, > > > > I'm getting ready to put up a Rohn 25 Insulated Base ~1/4 wave vertical. > > (115') and I'd like to get some advice if possible. > _________________ > Searchable Archives: http://www.contesting.com/_topband - Topband > Reflector > _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector _________________ Searchable Archives: http://www.contesting.com/_topband - Topband Reflector
