Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

Hank - any RBN node-op can make his output available at a local user telnet port.  That's a built-in feature of the RBN Aggregator, thanks to W3OA. 73, Pete N4ZR Check out the Reverse Beacon Network at , now spotting RTTY activity worldwide. For spots, please use your

Re: Topband: YCCC 9 Circle preamp failure

Paul is absolutely correct. The op-amp is a configured as non-inverting. I incorrectly “assumed” it was wired to invert simply because all of the pre-amps show the same 180 phase shift. Steve From Babcocks iPhone > On Sep 13, 2019, at 1:56 PM, Paul Christensen wrote: > > Steve, > > I

Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

Arrgghhh - maybe you have a deal with W3LPL -to give you his RX output - this wont work otherwise because of the delay for next RBN output - - but maybe you have someone around to give you a CW signal to use and read out levels yourself . Hank _ Searchable Archives:

Re: Topband: YCCC 9 Circle preamp failure

I'm running the YCCC RX array. I had to add 100K carbon resistors between the input terminal and ground as a static drain or the input caps would puncture and burn out the Integrated Circuit. 73 Lloyd - N9LB -From: "VE6WZ_Steve" To: "topband" Cc:

Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

Now that I think about it a bit -- I wonder if you put up a small vertical off to the side toward the W3LPL RBN and fed some power into it as a reference signal then fed the tower with that little vertical open and fix up switching so you could switch between the two several times for each

Re: Topband: YCCC 9 Circle preamp failure

Steve, I recently ran into an identical problem with an Alpha 89 amplifier. A pair of 0.01 uF/100V caps had failed on the plate choke clapper arm relay. The caps are used on the relay coil as an RF bypass to ground. In time, RF caused the caps to become leaky. With 1KW RF applied on some

Topband: YCCC 9 Circle preamp failure

After 2.5 years of flawless operation, earlier this summer my YCCC 9 circle rx array started to develop some strange inter-mod noise, and random junk showed up on 160m when using the array. I isolated the problem to be the .1 uF coupling capacitors on the input of the amps. This happened on 4

Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

Rick, I misled you with the reference to low-angle radiation. I'm broadly aware of how ground conductivity in the Fresnel zone works.  What I'm interested in doing is characterizing how much my signal improves as I add radials - sort of like a distant field-strength meter. 73, Pete N4ZR Check

Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

On 9/13/2019 6:31 AM, N4ZR wrote: I don't think I've ever read anything on this topic.  Basically, what I'm asking is, could ground wave to a fairly nearby Skimmer be used as an analogue to low-angle radiation to assess the effectiveness of radial systems on an inverted L?  W3LPL is about 30

Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

Pete Interesting idea to be sure...Regardless of the "theoretical" answer. I would suggest you take daily readings (probably between 11AM and 1PM) for a month and log those before starting to add radials. If day in and day out you get variation of more than a few tenth's of a db the W3LPL

Re: Topband: [TowerTalk] Skip Distance

Just remembered one other thing, the hours I use are SOLAR noon to SOLAR 2 pm. Where I live daylight time 10 am is 9 am standard time, and 8:50 am Solar time. In Lexington, Ky, USA that would be 8:23 AM. So during summer, I wait until 1 pm to measure. HOWEVER... Even then there can be residual

Re: Topband: Relationship Between Ground Wave and Low-Angle Radiation

On 9/13/2019 6:31 AM, N4ZR wrote: I don't think I've ever read anything on this topic.  Basically, what I'm asking is, could ground wave to a fairly nearby Skimmer be used as an analogue to low-angle radiation to assess the effectiveness of radial systems on an inverted L?  W3LPL is about 30

Re: Topband: [TowerTalk] Skip Distance

Try it at midday. 73 Clive GM3POI -Original Message- From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Roger D Johnson Sent: 13 September 2019 10:11 To: Towertalk Reflector; Top Band Reflector Subject: Re: Topband: [TowerTalk] Skip Distance These test were in late

Re: Topband: [TowerTalk] Skip Distance

These test were in late morning to early afternoon. 73, Roger On 9/12/2019 9:02 PM, Roger D Johnson wrote: I've been running some tests on my 8 circle array with K1JB. Joe is 17 miles away and I sometimes notice deep fading on his signal. Makes plotting the antenna pattern very difficult. Is

Topband: Relationship Between Ground Wave and Low-Angle Radiation

I don't think I've ever read anything on this topic.  Basically, what I'm asking is, could ground wave to a fairly nearby Skimmer be used as an analogue to low-angle radiation to assess the effectiveness of radial systems on an inverted L?  W3LPL is about 30 miles from me and has a very