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QST Downloads Feb 19th 2016, 16:34 5 5,774 on 25/4/20
March 2016 QST Compact Multiband Dipole Feb 19th 2016, 15:23 1 3,302 on 19/2/16
Antenna analyzer vs feedline type Sep 21st 2012, 14:37 1 4,886 on 21/9/12
USB to Serial Port problems--Prolific Drivers Aug 3rd 2012, 18:27 2 5,791 on 26/12/15
Italian Phishing emails! Dec 13th 2011, 14:20 1 4,469 on 13/12/11
John K0GMO needs help designing SS Amp Nov 17th 2011, 15:53 1 4,477 on 17/11/11
1 Farad Capacitor to Eliminate Headlight Flicker? Oct 19th 2011, 13:14 4 6,372 on 9/11/11
History of Relay Rack Dimensions? Oct 17th 2011, 12:58 2 4,505 on 25/10/11
Miswired Selsyn Oct 13th 2011, 17:51 1 4,637 on 13/10/11
Stealth Antenna wire Sep 12th 2011, 12:51 2 5,229 on 13/9/11

Latest Posts

Topic Author Posted On
Antenna Selection rsprey 2 days, 3 hours ago
This web site has a ton of info on mobile installations.

Sometimes car user groups can be helpful.

Zak W1VT
ARRL Senior Lab Engineer
Bad QRM from stovetop circuit WO4X 3 days, 13 hours ago Morgan manufacturing sells line filters.

An RX loop with a sharp null could be oriented to improve reception.
A small loop may allow placement to best null the interference, something that isn't possible with a big loop.

A null canceller should help, but may require some experimentation and practice for adequate results. It typically requires some skill for best results.

Zak W1VT
ARRL Senior Lab Engineer
Determining direction of interference traveling via a power line W1NT 1 week, 4 days ago Waterfall display Audio Audio

Troubleshooting Fldigi kb1yvr 1 week, 6 days ago
looking to purchase a new radio cbatti7370 2 weeks, 2 days ago
It is very hard to make an indoor antenna in a typical high rise building. The construction acts as effective shield. The windows may also act as shields, having an extremely thin layer of metal that prevents radio waves from passing through.

You may want to borrow a radio or purchase an inexpensive shortwave receiver to determine whether you can hear anything before proceeding. Hearing is much easier than transmitting.

You may need to consider other options, such as using a remotely located station. In the past some hams would do most of their operating portable. Some hams would combine it with expensive vacations and operate from other countries.

Zak W1VT
ARRL Senior Lab Engineer

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