Re: Topband: detuning shunt fed tower

2012-11-30 Thread N1BUG
Thanks to everyone who replied (many off list)! I will be working through personal replies and follow-ups but have spent most of the last 24 hours frantically investigating my station setup. I do have some SEVERE new noise issues, and that vertical still needs to be detuned. However... I

Re: Topband: detuning shunt fed tower

2012-11-30 Thread Jon Zaimes AA1K
On 11/29/2012 8:42 AM, N1BUG wrote: Often, while listening to such a noise on one Beverage, switching from the vertical to a different transmit antenna (thus leaving the ~250 feet of coax feeding the vertical open at the shack end), there will be a dramatic change in noise on the Beverage,

Re: Topband: detuning shunt fed tower

2012-11-30 Thread Guy Olinger K2AV
Oh, sounds like you are on the cleanup trail. Chasing out the noise is often the major eye-opening event for state of the station. Trust nothing, investigate everything. Measure, measure, measure. Signal to noise. Take notes and save them. Good luck! 73, Guy. On Fri, Nov 30, 2012 at

Topband: detuning shunt fed tower

2012-11-29 Thread N1BUG
I have made numerous attempts to detune my vertical over the past 6 years. I admit at this point I have no idea what I did wrong or what to try next. I have what I believe to be evidence the vertical is interacting significantly with the several Beverages, which of necessity are close to it. I

Re: Topband: detuning shunt fed tower

2012-11-29 Thread Markus Hansen
Hi Paul: I have a small rotating terminated loop receiving antenna which is located only 20 feet from a Inverted L - FCP (folded counter poise) transmit antenna. The amount of noise re-radiated from the inverted L to the terminating loop is very high, over S9. ( receiver sensitivity -128dB