Re: Topband: 160m Vertical matching Help

Well, yes, the transmitter is looking into the transmission line and then the antenna load, so they are different.  To be fair you need to place the analyzer at the input (TX) end of the line.  Now the TX and the analyzer see the same thing.  But this isn't a good way to match the antenna to

Re: Topband: 160m Vertical matching Help

In my experience the vertical with its top loading etc. Needs to be resonant at 2.1 Mhz. Then a 50 ohm match will be easily achieved with just a few turns from the bottom. I tried it first with the vertical resonant at 2.001 Mhz then I found that the impedance tapping point did also influence

Re: Topband: 160m Vertical matching Help

I also concur with JC's recommendation. Antenna analysers are useful, but you change the circuit when you remove the feed line and connect the analyser. What your analyser sees is different to what your transmitter sees. Luke VK3HJ -Original Message- From: MR TREVOR DUNNE Sent:

Re: Topband: Rotator creating spur on 1820

Likely all the spurs you see on 160 that are caused by AM stations will land on 10 kHz increments because the stations are spaced on 10 kHz increments. I identified one of the stations that was a big contributor to my problem and that was on 1730. I haven't found the other station yet. I

Re: Topband: Rotator creating spur on 1820

Hi Lloyd: I would not recommend using braid to connect the mast to the tower. The braid will take on water quickly and become less effective. A large flexible insulated cable is the best way to go. There are several ways to do what you describe. I think the bypass is very good practice to

Re: Topband: what does it take to get on new band 600 meters

I've been trying to get Heathkit to produce a dual bander of some sort for the two new bands.  Why not start by dropping them a line supporting the idea? Regards,Jeff W6JK On Thursday, November 2, 2017 10:35 AM, Kevin Adam wrote: What does it take to get on 600 meters

Topband: what does it take to get on new band 600 meters

What does it take to get on 600 meters radio antenna transceiver power requirements N9IWW _ Topband Reflector Archives - http://www.contesting.com/_topband

Re: Topband: Rotator creating spur on 1820

Do you have a heavy gauge flexible strap jumpering the mast pipe to the top of the tower? The mast pipe must be at the same electrical potential as the tower. The thrust bearing and rotor motor probably is not a low impedance path. I use the commonly available 1 inch wide woven braid / ground

Re: Topband: Rotator creating spur on 1820

Interesting you have the spur on 1820. I have the exact same situation on 1820 as well. Sometimes I can actually pull weak audio off the spur but have not been able to identify which local station or stations are mixing to create the spur. It never varies in strength and I just assumed it

Re: Topband: Rotator creating spur on 1820

Hi Jerry Any cable/wire is an antenna. If it long enough or near 120ft it will work like a 1/4 wave vertical. The path to the ground is important because the current will add to other circuits at the input of the receiver. Even the AC line can be the return path to ground. You can watch the

Re: Topband: Rotator creating spur on 1820

Unfortunately no. Already tried that. That would have been too easy of a fix. Jerry On 11/2/2017 9:47 AM, donov...@starpower.net wrote: Hi Jerry, There's a good chance the problem originates inyour control box rather than your rotator. Does the problem stop if you completely disconnect the

Re: Topband: Rotator creating spur on 1820

Hi Jerry, There's a good chance the problem originates inyour control box rather than your rotator. Does the problem stop if you completely disconnect the control box? 73 Frank W3LPL - Original Message - From: "K4SAV" To: topband@contesting.com Sent:

Re: Topband: 160m Vertical matching Help

I Don't think we even have any AM stations in the country never mind close enough to bother my MFJ but thanks for the info, Trevor EI2GLB - Original Message - From: Russ Tobolic To: JC , 'Ronald Gorski' , 'MR TREVOR

Topband: Rotator creating spur on 1820

I have a problem for which someone on this forum has the solution. I know that because I have seen that message sometime in the past. The problem is that my rotator is rectifying a couple of AM station signals and creating a spur on 1820. It's normally pretty weak on my receiving antennas

Re: Topband: 160m Vertical matching Help

JC's caution is important. Check to see if you have any MF broadcast stations near you.  I have the MFJ259 and a 5KW AM station at 1480 Kc about 1.5 miles away which renders the 259 useless on 160M' Russ, N3CO From: JC To: 'Ronald Gorski' ;

Re: Topband: No American activity

About 0300Z (11PM local time) the only station I heard was TZ4AM.  I couldn't stay on longer as I have to get up around 0730Z (3:30AM local time). 73, Larry W6NWS On 11/2/2017 5:43 AM, Roger Kennedy wrote: Well as our Sunrise seems to be too late in the night for many people, I came on at

Re: Topband: No American activity

Hi all, I agree with Roger because - if you take a glance at the "logged in list" - it looks like quite a few NA stations are active. You can choose to set "I am away" to make the picture more clear. IMHO Len SM7BIC -Ursprungligt meddelande- Från: Topband

Re: Topband: No American activity

HI Roger, I see that you were spotted by 4 RBN stations in the Eastern part of the US (MA, MD, NH, and PA), and nothing West of that. As Mike (N2MS) said, 0400 UTC is very late in the evening for working folks that live in the East Coast or Midwest USA as 0400 UTC is currently midnight local

Topband: No American activity

Well as our Sunrise seems to be too late in the night for many people, I came on at 0400 last night . . . surely that's not too late over there? The band was clearly open (got a +48dB RBN report from W1NT) . . . but only had ONE DX QSO ! There were 3 other Europeans calling CQ DX too . . .