First off - why do you have such a high X_subc cap in series with the input? 2nd question - is everything mounted on a solid ground plane? Can you post a pix of your actual ckt layout? RF Jim ----- Original Message ----- From: "Dale Botkin" To: Sent: Monday, September 02, 2002 4:44 PM Subject: [EE:] What am I doing wrong? (RF amp) > I'm in the last stages of getting a new project working. I have a > PIC-driven circuit that uses a Radiometrix TX-1 > (http://www.radiometrix.com/html/products/tx1_6.html) to occasionally > transmit a data stream (that part is working). The TX-1 has 10mW output > power. I'm trying to use a Mitsubishi M57732 RF amp module to increase the > TX power to a couple of Watts. The TX-1 produces a clean signal at 10mW, > but when I connect the amp it's not working. Current draw is about > 400-450mA, and no apparent output from the amp. I've got the datasheet for > the amp module, but it's not very informative and I have not found any app > notes or detailed examples anywhere. Going from a couple of circuits I did > find for similar modules, I am using this arrangement: > > http://www.botkin.org/dale/RFAmp.png > > Can anyone who has used this or a similar RF amp module see what I'm doing > wrong here? It seems pretty straightforward, but I'm not having much luck > with it. > > Dale > > -- > http://www.piclist.com#nomail Going offline? Don't AutoReply us! > email listserv@mitvma.mit.edu with SET PICList DIGEST in the body > -- http://www.piclist.com#nomail Going offline? Don't AutoReply us! email listserv@mitvma.mit.edu with SET PICList DIGEST in the body