ARRL

W1VT

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

Latest Topics

Topic Created Posts Views Last Activity
Antenna analyzer vs feedline type Sep 21st 2012, 14:37 1 1,370 on 21/9/12
USB to Serial Port problems--Prolific Drivers Aug 3rd 2012, 18:27 1 1,659 on 3/8/12
Italian Phishing emails! Dec 13th 2011, 14:20 1 1,367 on 13/12/11
John K0GMO needs help designing SS Amp Nov 17th 2011, 15:53 1 1,257 on 17/11/11
1 Farad Capacitor to Eliminate Headlight Flicker? Oct 19th 2011, 13:14 4 2,178 on 9/11/11
History of Relay Rack Dimensions? Oct 17th 2011, 12:58 2 1,474 on 25/10/11
Miswired Selsyn Oct 13th 2011, 17:51 1 1,315 on 13/10/11
Stealth Antenna wire Sep 12th 2011, 12:51 2 1,901 on 13/9/11
Designing a ham bench Aug 29th 2011, 12:38 2 1,998 on 29/8/11
Can't find recent Hint and Kink Aug 26th 2011, 13:01 1 1,908 on 26/8/11

Latest Posts

Topic Author Posted On
Q on dBi, dBd & dB(nothing) vendor data? xof7fox 1 day, 20 hours ago

You should not assume anything with regard to antenna gain figures. It is extremely easy to produce misleading gain figures, which is why they aren't allowed in QST unless backed up by computer modeling.

In January, 1998, the ARRL Board of Directors changed the ARRL advertisement-acceptance policy to permit the advertising of antenna gain figures for antennas whose performance can be accurately modeled using either NEC-4 or Yagi Optimizer modeling programs. To do this, advertisers submit their antenna models for verification by the ARRL Laboratory staff. If the Lab is able to verify that the model accurately represents the design of the antenna, the advertiser may then advertise the antenna gain figures in ARRL publications.

Zack Lau W1VT
ARRL Senior Lab Engineer
Recommendations for HF antenna/tuner for a newbie wshartjr 3 days, 13 hours ago
If you are in a HOA, it is best to either get permission to put up an antenna or put up a display of the American Flag which is also used as antenna. Either will put you on sound legal footing--the Freedom to Display the American Flag act of 2006 is a law passed by Congress and signed by President Bush.

Zack W1VT
Browsing QST prior to 2012 AC8SA 5 days, 19 hours ago
Providing a full text search is particularly difficult given that amateurs are particularly interested in "uniques." They want an exact count of how many times a particular call appears in print, even it only happens once or twice in 100 years of QST. Normally, to cut data conversion costs, uniques are just converted to a likely common word.

Zack W1VT
Hy-Gain balun coax connector OA4SS 1 week, 4 days ago
I suggest removing the connector because if it attached to a piece of metal--there may be too much heat sinking to obtain a good solder joint with typical soldering equipment--you may need a gas torch or a very big iron.

Zack W1VT
Hy-Gain balun coax connector OA4SS 1 week, 5 days ago

Can you substitute a standard 4 hole jack that you know you can solder? Alternately, remove the connector and see if you can make a good solder joint, then install the connector.

You should be able to differentiate aluminum by weighing it. Aluminum is significantly lighter than materials that can be easily soldered.

Zack W1VT


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