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Circuit Board Construction Question Mar 23rd 2012, 13:10 4 4,754 on 15/9/13
10 Meter AM Nov 14th 2011, 19:24 4 4,962 on 14/12/11
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Switching Open Wire Feedline Bewtween a Transmitter and Receiver? Aug 8th 2011, 13:34 1 5,713 on 8/8/11

Latest Posts

Topic Author Posted On
2 kHz third order dynamic range on TS-590S KR2F 3 weeks ago
You are very welcome!

Bob Allison
ARRL Test Engineer
Best Way to Ground a QRP Radio in the Field K0JNR 3 weeks, 1 day ago
For portable operations; if using a dipole, a ground is not needed. If using an end fed wire, a counterpoise is needed. The counterpoise can be a single wire, cut to a quarter wave on the frequency used.
2 kHz third order dynamic range on TS-590S KR2F 3 weeks, 1 day ago
The ARRL Test Engineer says that unless you have a high gain antenna, atop of a tower, you may not have enough signal voltage at the antenna jack to warrant a 3 IMD DR of over 100 dB (I've seen contest & DX stations that need 100+ dB). If you have a G5RV, a vertical, or a 3L beam, you will never experience IMD, unless you have two very strong local stations on at the same time, spaced evenly apart in frequency (2&4 kHz away, in this example). Granted, signals can be very strong on the lower bands (160 & 80 meters), but the IMD products, if any, are usually far below the local noise floor (not receiver noise floor).
cw proficinty wb3hus 3 weeks, 4 days ago
The Code used is the International Morse Code. It is the same code as practice sessions and the ARRL Qualifying Runs (proficiency). 99.9 percent of the operators heard on-air in CW mode use this code. There may be still a few old brass pounders out there who do the American Morse code, which is a holdover from railroad telegraphy, but perfectly legal to use. .
Field Day back to it's roots W9KHz on 25/2/21
Winter Field Day is not an ARRL event. Here's the group that sponsors it and makes the rules:

ARRL Field day is an ARRL event. If you feel strongly about a needed change of rules, please feel free to contact your division director. There is no one at HQ that makes the rules; they are made by a committee of volunteers.

The purpose of Field Day is to be prepared for a natural disaster and to exercise skills in passing messages under difficult conditions (in the field) for the benefit of the public. For those at home, have a plan for getting on the air during emergencies, when there is no commercial power available.

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