WB1GCM
| Joined: | Sat, Apr 4th 1998, 00:00 | Roles: | Super Moderator | Moderates: | N/A |
Latest Topics
| Topic | Created | Posts | Views | Last Activity |
|---|---|---|---|---|
| Circuit Board Construction Question | Mar 23rd 2012, 13:10 | 4 | 10,839 | on 15/9/13 |
| 10 Meter AM | Nov 14th 2011, 19:24 | 4 | 10,837 | on 14/12/11 |
| Baofeng UV-3R Harmonic Fix | Nov 11th 2011, 14:18 | 1 | 10,944 | on 11/11/11 |
| Novice Trivia Question: 10 meters | Oct 26th 2011, 18:55 | 2 | 9,618 | on 1/11/11 |
| European AM'er Needs Help | Aug 25th 2011, 19:45 | 3 | 9,516 | on 23/11/11 |
| How to Set the Temperature Setting On a Soldering Station | Aug 16th 2011, 12:18 | 1 | 11,352 | on 16/8/11 |
| How to Remove Cigarette Smoke from a Newer Solid State Transceiver? | Aug 8th 2011, 18:15 | 10 | 19,657 | on 16/9/20 |
| Switching Open Wire Feedline Bewtween a Transmitter and Receiver? | Aug 8th 2011, 13:34 | 1 | 11,831 | on 8/8/11 |
Latest Posts
| Topic | Author | Posted On |
|---|---|---|
| Sears Antenna Matcher | KawBob | on 17/5/22 |
| I'm not much help, but in my 48 years of hamming, I've never seen one at ham flea markets, etc. It must have had a very limited run, intended to match a limited range of impedance, at 11 meters, rated at no more than 10-20 Watts. It may still be of use for 12 through 10 meters, QRP. Its value is in its obscurity. I could find no information about it, other than a photo, on the web. Cheers, 73, WB1GCM |
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| 2 kHz third order dynamic range on TS-590S | KR2F | on 23/3/21 |
| You are very welcome! Bob Allison WB1GCM ARRL Test Engineer |
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| 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. . | ||
