tag:blogger.com,1999:blog-9071048343455395511.post1084580846914785476..comments2024-03-24T22:03:31.205+00:00Comments on Roger G3XBM's (Mainly) Amateur Radio Blog: 10m WSPR TX beaconRoger G3XBMhttp://www.blogger.com/profile/13673890140751539870noreply@blogger.comBlogger5125tag:blogger.com,1999:blog-9071048343455395511.post-12039582040513840522015-11-23T16:50:36.479+00:002015-11-23T16:50:36.479+00:00Sorry Steve, we were at cross-purposes. Although m...Sorry Steve, we were at cross-purposes. Although my 630m transverter (see my website) used a 3.2MHz crystal on TX, other frequencies could be used. In WISPY the PA output can be increased further by paralleling more PA devices. I used 4 at one point. Much lower cost than a 2N3866.Roger G3XBMhttps://www.blogger.com/profile/13673890140751539870noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-79837608166832067402015-11-23T15:58:34.398+00:002015-11-23T15:58:34.398+00:00Not 14.060 xtals .... something that could be divi...Not 14.060 xtals .... something that could be divided down for a 630m version of your circuit.Steve McDonaldhttps://www.blogger.com/profile/06229640265009249231noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-28565839967346813932015-11-23T07:56:25.357+00:002015-11-23T07:56:25.357+00:00No 14.060 crystals are commonly available and low ...No 14.060 crystals are commonly available and low cost! That is why this circuit was developed! This is probably the most common crystal on the planet. It is the 20m QRP frequency. Roger G3XBMhttps://www.blogger.com/profile/13673890140751539870noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-58039705233044392862015-11-23T00:32:24.863+00:002015-11-23T00:32:24.863+00:00....or maybe not. The xtal would be a problem unle.......or maybe not. The xtal would be a problem unless a divided down HF xtal is used? I don't think a standalone L-C oscillator would be stable enough.<br /><br />SteveSteve McDonaldhttps://www.blogger.com/profile/06229640265009249231noreply@blogger.comtag:blogger.com,1999:blog-9071048343455395511.post-237733411989385992015-11-23T00:28:06.672+00:002015-11-23T00:28:06.672+00:00That's a very interesting circuit Roger. It mi...That's a very interesting circuit Roger. It might make a good 630m experimental project, maybe with a low power linear switching FET in the PA.....hhhmm.<br /><br />Steve VE7SL 73Steve McDonaldhttps://www.blogger.com/profile/06229640265009249231noreply@blogger.com