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Total 8 documents matching your query.

1. Topband: Signal source (score: 1): Author: "Clive GM3POI" <gm3poi2@btinternet.com>; Date: Tue, 25 Nov 2014 07:29:34 -0500; Hi, Can anyone recommend a stable low power signal source suitable for tweaking RX antennas. I only need 160m and will only be used within say 10 wavelengths. Preferably something off the shelf. Than; /archives//html/Topband/2014-11/msg00126.html (7,068 bytes)
2. Re: Topband: Signal source (score: 1): Author: George Dubovsky <n4ua.va@gmail.com>; Date: Tue, 25 Nov 2014 07:45:17 -0500; Nothing original here, but I use a cheap 1.8432 packaged logic-level oscillator driving all the gates of a 74LS04 in parallel, followed by a switchable 20 dB pad, all packaged up in a small minibox.; /archives//html/Topband/2014-11/msg00127.html (7,679 bytes)
3. Re: Topband: Signal source (score: 1): Author: George Dubovsky <n4ua.va@gmail.com>; Date: Tue, 25 Nov 2014 07:55:40 -0500; I should add that all of the LS04 outputs are summed through 270 Ohm resistors, giving something close to 50 Ohms output. At any rate, I think I get something like 0 dBm into 50 Ohms, with the switch; /archives//html/Topband/2014-11/msg00128.html (7,943 bytes)
4. Re: Topband: Signal source (score: 1): Author: "John Kaufmann" <jkaufmann@alum.mit.edu>; Date: Tue, 25 Nov 2014 08:09:27 -0500; Antenna analyzers such as the AEA or MFJ put out tunable low power CW signals that can be used for this purpose. My AEA VIA Bravo has a "CW source" mode that generates a very stable signal. I've used; /archives//html/Topband/2014-11/msg00129.html (7,636 bytes)
5. Re: Topband: Signal source (score: 1): Author: Tree <tree@kkn.net>; Date: Tue, 25 Nov 2014 07:10:01 -0800; All good ideas thus far. This is a handy device to have for other purposes and would work well for your application as well Clive. http://www.elecraft.com/XG3/xg3.htm Tree N6TR _________________ Topb; /archives//html/Topband/2014-11/msg00131.html (9,359 bytes)
6. Re: Topband: Signal source (score: 1): Author: Russ Tobolic via Topband <topband@contesting.com>; Date: Tue, 25 Nov 2014 15:55:36 +0000 (UTC); Hello Clive; Check out the IV3PRK website- www.iv3prk.it under "receiving antennas" and then the "rx ant. tests" tab.Luis has a circuit using a 1.843 crystal oscillator. I use the same device wit; /archives//html/Topband/2014-11/msg00133.html (8,906 bytes)
7. Re: Topband: Signal source (score: 1): Author: Herbert Schoenbohm <herbs@vitelcom.net>; Date: Tue, 25 Nov 2014 12:04:17 -0400; The MFJ 259B is a simple way to provide a 160 meter signal source with a small rubber ducky attached to the PL-259 output. It may not be the most stable signal source but it will be OK for most RX an; /archives//html/Topband/2014-11/msg00134.html (9,045 bytes)
8. Re: Topband: Signal source (score: 1): Author: "Tom W8JI" <w8ji@w8ji.com>; Date: Wed, 26 Nov 2014 19:56:33 -0500; There are hundreds of devices in that range that are complete oscillators. http://www.mouser.com/Passive-Components/Frequency-Control-Timing-Devices/Oscillators/_/N-7jdfi?P=1z0who4Z1z0wmtcZ1z0wntsZ1z; /archives//html/Topband/2014-11/msg00148.html (11,144 bytes)

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