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Circuit Board Construction Question Mar 23rd 2012, 13:10 4 5,980 on 15/9/13
10 Meter AM Nov 14th 2011, 19:24 4 6,263 on 14/12/11
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Switching Open Wire Feedline Bewtween a Transmitter and Receiver? Aug 8th 2011, 13:34 1 6,986 on 8/8/11

Latest Posts

Topic Author Posted On
2 kHz third order dynamic range on TS-590S KR2F on 23/3/21
You are very welcome!

Bob Allison
ARRL Test Engineer
Best Way to Ground a QRP Radio in the Field K0JNR on 22/3/21
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 on 22/3/21
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 on 19/3/21
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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