Topband: RX ant-Frozen ground

2016-12-07 Thread VE6WZ Steve
I’m wondering what experiences are out there regarding small vertical array, or beverage performance in the winter over frozen ground. The reason for this question is that over the last 2 weeks or so, my HI-z (24’ vertical) SDR skimmer antenna at my remote QTH has shown somewhat diminished per

Re: Topband: RX ant-Frozen ground

2016-12-07 Thread Tim Shoppa
Steve - when I see an increase in Intermod, my mind goes away from poor grounds, and towards oxidized connectors and flaky relay contacts. Reseat all connectors, tighten all screws, and hot-switch relay contacts till you find the offender. Tim N3QE Sent from my iPhone > On Dec 7, 2016, at 4:3

Re: Topband: RX ant-Frozen ground

2016-12-07 Thread Lee STRAHAN
Sent: Wednesday, December 07, 2016 1:36 PM To: topband@contesting.com Subject: Topband: RX ant-Frozen ground I’m wondering what experiences are out there regarding small vertical array, or beverage performance in the winter over frozen ground. The reason for this question is that over the last 2

Re: Topband: RX ant-Frozen ground

2016-12-07 Thread Don Moman VE6JY
Hi Steve; Even though I am about 80km from the nearest MW transmitter, BCB IM is a constant issue here. Considerably worse in the winter. I am always VERY suspicious that any crankup towers would be a significant contributor to the creation of IMD products, both because of the sliding sections a

Re: Topband: RX ant-Frozen ground

2016-12-07 Thread donovanf
ot;VE6WZ Steve" , topband@contesting.com Sent: Wednesday, December 7, 2016 10:23:40 PM Subject: Re: Topband: RX ant-Frozen ground When we at Hi-Z see deterioration it is often the output cable running to the receiver where the typical aluminum shield no longer makes great contact. Also if it's

Re: Topband: RX ant-Frozen ground

2016-12-08 Thread Roger Parsons via Topband
Hi Steve I am fairly confident that Sudbury counts as a cold place... I have found Beverages to be very insensitive indeed to their locale and operating conditions. (I have a total of 15, mostly phased.) I now use 4 x 50' radials at each end, but have previously used 3 x 25'. I do not believe t

Re: Topband: RX ant-Frozen ground

2016-12-08 Thread Mike Waters
I thought I'd share my own experience with Beverages and *newly-driven-in ground rods* in frozen soil. Here's a relevant excerpt from www.w0btu.com/Beverage_antennas.html#Beverage_antenna_grounds "When I [first] put up my ... Beverage, ... I occasionally had to 'help' the ground conductivity at th