What about one of these? http://protoboards.theshoppe.com/qfp_0_5_mm.html
It's for QFP devices but the pitch is right (0.5mm) JR --- In [email protected], "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> wrote: > > Add the working "VUE Meters" enclosed in the zip to your SDRadio or > Winrad, its really cool to use. I use it with CIAO also. I searched a > long while to find some that finally work. Just click it on when you > are using your SDR software. Do not resize, but if you do and can't > get it back to size; just "right click" it with the mouse and your back > to size again. > > > *The AD8333 by Analog Devices seems the thing for Soft Rock 40 like > projects which would reduce the numbers of parts and also remove the > need for a phase splitting transformer. Don't let the 32 pin structure > scare you. You will not use all of them pins. Some may however > require grounding as indicated. We do need someone to come up with a > place to get a 32 pin prototyping surfboard for using these chips. > {Using this does not mean I am departing away from DIP chips and other > designs. But this is interesting to use nonetheless. And who knows?} > > The closest board Jameco has is a 28 pin surfboard. So they don't > have anything. > > The AD8333 Data Sheet PDF might at first seem to indicate that the > device requires allot of external parts, however it does not have to be > used in the complex ways depicted. The binary logic to select the > proper phase shift in degrees should be via a preset High State voltage > on the proper pins: I assume this is the case by the logic state chart > depicted in the data. In time we'll know more about it all. > > Note: the LO IN is a "divide by 4" input! It also seems that it has > somewhat of a high level output. 161 dB/Hz. The data indicates > however that the output needs to be either passband filtered or at > least matched up with the right external chips. The base band is > determined by the output circuits accoding to the data. > > An interesting note is the page 10 section: "Bypassing Current Mirror > and Decreasing Noise." > > You do not have to have a complexity as elaborate as the Evaluation > Board Diagrams in the AD8333 Data Sheet. > > Basically, you only need to split the antenna or i.f. input (if you > are sampling a seperate reciever i.f.) into two in phase lines going to > inputs CH1 and CH2 of the AD8333. Add in the LO IN and let the chip > phase shift the signals as it is designed to do. Followed then by a > suitable audio amplifier IC's. Some PC soundcards might be able to use > the raw output after a little filtering which might merely be a RC sort > of filter. > > Splitting of the antenna input can be done by a simple resistor > network but I have also seen a sort of low pass inductor input in each > split section but the idea is to simply divide and keep them in phase > here. And so, that won't require rocket science. > > Since the circuit seems to have allot of gain I assume it can be used > merely via an antenna input without forward or frontend gain of any sort. > > If you get some samples we all then can explore this chip and see > what all it will take? And how simple it can be? If we can also get > us some 32 pin surface mount protoboards somewhere? The AD8333 > evaluation boards are way to high priced for us I feel. > > LO IN's: > > 455 kHz*4 = 1820 kHz = 1.820 MHz > 10.7 MHz*4 = 42.80 MHz > > New Netscape Browser 8.1.2 is now as fast as Mozila Firefox and has > anti Spyware! > > > _____________________________________________________________________ > PrivatePhone - FREE telephone number & voicemail. > A number so private, you can make it public. > http://www.privatephone.com > > > > [Non-text portions of this message have been removed] > Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/soft_radio/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/soft_radio/join (Yahoo! ID required) <*> To change settings via email: mailto:[EMAIL PROTECTED] mailto:[EMAIL PROTECTED] <*> To unsubscribe from this group, send an email to: [EMAIL PROTECTED] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
