Take a look at the TRF4400. This chip has a DDS and an amplifier on board and costs about $5. It has the capability of accepting a modulation signal as well, presuming that you want to modulate it with data. I think TI may have a matching receiver. Although the spec indicates it is for the 450 MHz range only, I know of one person who has successfully used it down to 50 MHz or so. It's available from Digikey. the TRF4900 appears to be the same thing for the 920 MHz neighborhood. 72/73 de WB8RCR http://www.qsl.net/wb8rcr didileydadidah QRP-L #1446 Code Warriors #35 ----- Original Message ----- From: "Falcon Wireless Tech Support - KF4HAZ" To: Sent: Friday, July 09, 2004 10:24 AM Subject: [EE]: Very low power transmitter > I have a side project, probably just a one off, where I need a low power > transmitter. > Something around the range 2.5 to 25mw across the spectrum of ~100 to 500 > MHz (does not have to have a flat output power level across the entire > spectrum) > Needs to be capable of about 1.25 to 2.5 KHz deviation (sine wave or > something close, squareish waves would be a plus) in the low audio range. > Transmit frequency needs to be controllable via a micro-controller (again > accuracy not terribly critical but this is the one area that should be > fairly accurate) if I tell it to transmit at 450MHz it should be within 5 or > 10KHz of this frequency and reasonably stable. > > KF4HAZ - Lonnie > > -- > http://www.piclist.com hint: To leave the PICList > mailto:piclist-unsubscribe-request@mitvma.mit.edu > -- http://www.piclist.com hint: To leave the PICList mailto:piclist-unsubscribe-request@mitvma.mit.edu