Re: Topband: 160m Vertical matching Help

On 11/02/2017 11:25 PM, Wes Stewart wrote: 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

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

Wes Attaway (N5WA)" <wesatta...@bellsouth.net> Cc: topband List <topband@contesting.com> Subject: Re: Topband: 160m Vertical matching Help Trevol, the portion of the coil between the tap and the base of the vertical determines resonance and needs to be variable unless you were

Re: Topband: 160m Vertical matching Help

: Friday, November 03, 2017 1:46 AM To: Russ Tobolic Cc: 'Wes Attaway (N5WA)' ; JC ; 'topband List' ; 'Ronald Gorski' Subject: 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

Re: Topband: 160m Vertical matching Help

'MR TREVOR DUNNE' <ei2...@eircom.net>, 'Wes Attaway (N5WA)' <wesatta...@bellsouth.net> Cc: 'topband List' <topband@contesting.com> Sent: Thu, 02 Nov 2017 13:19:21 -0000 (GMT) Subject: Re: Topband: 160m Vertical matching Help JC's caution is important. Check to see if you have

Re: Topband: 160m Vertical matching Help

utics.com>; 'MR TREVOR DUNNE' <ei2...@eircom.net>; 'Wes Attaway (N5WA)' <wesatta...@bellsouth.net> Cc: 'topband List' <topband@contesting.com> Sent: Wednesday, November 1, 2017 5:30 PM Subject: Re: Topband: 160m Vertical matching Help Hi guys Before anything else, don't

Re: Topband: 160m Vertical matching Help

Rick, what are the ball park figured on the coil diameter I'm guessing 5 or so inches across is a good place to start Paul. N0AH Sent with AquaMail for Android http://www.aqua-mail.com On November 1, 2017 11:25:42 AM "Richard (Rick) Karlquist" wrote: > You need

Re: Topband: 160m Vertical matching Help

E" <ei2...@eircom.net>, "topband List" > <topband@contesting.com> > Sent: Wednesday, 1 November, 2017 17:25:25 > Subject: Re: Topband: 160m Vertical matching Help > > You need +j34 ohms in parallel with your coax coming in. > This is about 3 microhenries.

Re: Topband: 160m Vertical matching Help

...@contesting.com] On Behalf Of Ronald Gorski Sent: Wednesday, November 01, 2017 2:38 PM To: MR TREVOR DUNNE <ei2...@eircom.net>; Wes Attaway (N5WA) <wesatta...@bellsouth.net> Cc: topband List <topband@contesting.com> Subject: Re: Topband: 160m Vertical matching Help Trevol, the portion o

Topband: 160m Vertical matching Help

Hi Trevor Read Joe, W4TV's answer again ! The coil should be whatever inductance you need to resonate your slightly short antenna . . . then you can use that coil as an auto-transformer to get a good match, ie once the antenna is resonant, you can feed your coax a few turns up the coil. But

Re: Topband: 160m Vertical matching Help

...@contesting.com] On Behalf Of MR TREVOR DUNNE Sent: Wednesday, November 01, 2017 12:12 PM To: Wes Attaway (N5WA) Cc: topband List Subject: Re: Topband: 160m Vertical matching Help Hi Wes Thanks for the reply I can move the point of lowest SWR by moving the tap on the coil, I need to lower

Re: Topband: 160m Vertical matching Help

karlquist.com> To: "MR TREVOR DUNNE" <ei2...@eircom.net>, "topband List" <topband@contesting.com> Sent: Wednesday, 1 November, 2017 17:25:25 Subject: Re: Topband: 160m Vertical matching Help You need +j34 ohms in parallel with your coax coming in. This is about 3 mic

Re: Topband: 160m Vertical matching Help

Start by disconnecting the feedline. Connect a jumper to the junction of the vertical wire and the coil. Now use a grid dip meter and tap down the coil until the antenna is resonant (dip occurs) at the desired frequency. Now connect the feed line (shield to ground) and tap up the coil until

Re: Topband: 160m Vertical matching Help

Trevor, You haven't really provided enough information to solve your problem.  If you want to use a shunt coil then I suggest that you consider measuring the R-jX at your frequency of interest and then designing an L-network using purposeful shortening of the antenna to create a capacitive

Re: Topband: 160m Vertical matching Help

You need +j34 ohms in parallel with your coax coming in. This is about 3 microhenries. This would be around 6 turns on your coil if the turns are spaced a wire diameter. IOW, tap the coax 6 turns from the grounded end. Then tap the antenna to whatever tunes to 1.83 MHz. Rick N6RK On 11/1/2017

Re: Topband: 160m Vertical matching Help

; <wesatta...@bellsouth.net> To: "MR TREVOR DUNNE" <ei2...@eircom.net>, "topband List" <topband@contesting.com> Sent: Wednesday, 1 November, 2017 17:02:55 Subject: RE: Topband: 160m Vertical matching Help Without doing any modeling, an off the top of the he

Re: Topband: 160m Vertical matching Help

Vertical matching Help Hi All I finally got the vertical up and running, problem I have now is I can't find a low SWR on the coil, the best I can get is about 2.8:1 no matter where I tap the coil that's the best SWR, I can move that point up and down the band by moving the tap but the SWR stays

Topband: 160m Vertical matching Help

Hi All I finally got the vertical up and running, problem I have now is I can't find a low SWR on the coil, the best I can get is about 2.8:1 no matter where I tap the coil that's the best SWR, I can move that point up and down the band by moving the tap but the SWR stays the same, My