EMRFD Message Archive 3592

Message	Date	From	Subject
3592	2009-10-04 16:29:23	Tom	SSB QRP transmitter
I put up another video. This one is of an SSB transmitter cobbled together from various sources. 1. Dave Benson's `A Single-Board QRP SSB Transceiver for 20 or 75 Meters' http://www.hellocq.net/forum/attachment.php?attachmentid=152219 2. W8DIZ's RF Toolkits http://www.partsandkits.com/ 3. JBOT linear Amplifier by Ashhar Farhan http://www.phonestack.com/farhan/jbot.html 4. FCC-1/2 http://www.norcalqrp.org/ 5. HFProjects PA-100 http://www.hfprojectsyahoo.com/sla5wamp.html 6 An Elecraft K2 is used for the receiver. http://www.elecraft.com The video is on YouTube http://www.youtube.com/watch?v=njo4Z_8cdWs Tom,ak2b
3593	2009-10-05 05:46:35	Ashhar Farhan	Re: SSB QRP transmitter
congratulations tom! the modules look quite useful. you seem to be working pretty good dx with the design. have you cut the throttle on jbot to prevent it from overloading the hf linear? - farhan
3604	2009-10-06 09:08:50	Tom Hall	Re: SSB QRP transmitter
Farhan wrote: "have you cut the throttle on jbot to prevent it from overloading the hf linear?" Yes, I can get 5 watts out of the JBOT but lowered the drive to it for the reason you mentioned. I will play around a bit more and try it without the linear. So far, I've been surprised at how easy it has been to get a QSO going with 15 watts - even without a contest :). I'm sure I can do it with less. Thanks for your comments - and the JBOT. Tom, ak2b
3605	2009-10-07 05:45:55	Tim	Re: SSB QRP transmitter