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 On Tue, Nov 25, 2014 at 4:55 AM, George Dubovsky <[email protected]> wrote: > 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 switchable attenuator > dropping it down to -20 dBm. Good level for rx antenna experiments. > > 73, > > geo - n4ua > > On Tue, Nov 25, 2014 at 7:45 AM, George Dubovsky <[email protected]> > wrote: > > > 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. I run it off a > > 12V gel-cell. > > > > 73, > > > > geo - n4ua > > > > On Tue, Nov 25, 2014 at 7:29 AM, Clive GM3POI <[email protected]> > > wrote: > > > >> 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. Thanks Clive GM3POI > >> > >> _________________ > >> Topband Reflector Archives - http://www.contesting.com/_topband > >> > > > > > _________________ > Topband Reflector Archives - http://www.contesting.com/_topband > _________________ Topband Reflector Archives - http://www.contesting.com/_topband
