Topband: identifying noise source

2018-12-12 Thread Maciej Wieczorek
GM, I recently have some strange, pulsating noise on all 300 deg / NA beverages. Maybe someone have already experienced anything like this - what kind of device it can be? Here is a recording on wide filters in AM, around 3,4MHz (maximum signal).

Re: Topband: RX antenna switching - unused ports

2017-06-08 Thread Maciej Wieczorek
Hi Brad, what I can say from my perspective - in the last 10 years I have tried both grounding and terminating through 75ohm resistor. With the terminating I see absolutely no pattern distortion on my Beverage's, which was not so obvious when direct grounding was used. My Bev's often are

Re: Topband: 160 vertical/L

2016-11-30 Thread Maciej Wieczorek
Hi , did anyone try to match such 160m vertical /L or /T on 80m? How about efficiency? After my 31m tall vertical broke last sunday (now it's 23m only) my idea is to add 2 x15m top loading wires, making a T-vertical. 160m is a priority in this case and I know it will work OK, but I'd like to

Re: Topband: Bandpass filters for receive antennas / LW 225khz rejecting

2015-08-31 Thread Maciej Wieczorek
GM All, Can someone recomend me a simple high pass filter that will reject strong AM signal trasmitted at 225 khz? I've just looked at Petr OK1RR website and there is nice filter, but rejects 400khz-1600khz band, so will not work in my case... This signal at 225 Khz comes from Polish Radio I

Topband: IC 775 clicks

2012-01-23 Thread Maciej Wieczorek
GM/GE, Has anyone ever seen any mod for IC 775 DSP, for getting rid of CW clicks? I mean, kind of solution that they have for FT 1000 Mark V..? BTW, maybe I have a problem with my radio, with the signal S 9+30db on 160m (no amplifier) a friend located 30kms away was hearing my clicks for