I ultimately went with the 1 rf amp and splitter method which allowed lower current consumption and single supply operation. I had seen this approach in celsite dist amps. I used a fet IR 510 as I recall cheap and available.
On Sat, Jan 7, 2012 at 12:53 PM, David <[email protected]> wrote: > The FD-5680A specifications say the output is a 0.5 V RMS sine wave > into 50 ohms so there are lots of options if that is the signal you > want to distribute. > > There are a number of medium power operational amplifiers specified > for video applications which will operate at a gain of 2 allowing back > termination without signal loss while driving several 50 ohm loads in > parallel. Most will be current feedback but there are a few voltage > feedback ones as well. If you use low supply voltages, then you will > need to watch the input common mode voltage range and output voltage > range. AC coupling will make that easy. > > http://www.linear.com/product/LT1206 > > This amplifier is lower output current but operated at lower supply > voltages as well. I might try it with an emitter follower buffer. > > http://www.linear.com/product/LT1192 > > Since you are dealing with just a low level sine wave, a single > transistor amplifier for each channel would work fine as well. > > I would probably convert the sine wave into a logic level square wave > and maybe use some 50 ohm interface drivers. > > On Sat, 07 Jan 2012 11:39:32 -0500, Peter Gottlieb <[email protected]> > wrote: > > >So, here's a question. One app is a rack of gear which all needs to get > >the 10 MHz. I could just go find some distribution amp, but I would > >prefer to build something. Has anyone done this? I was thinking > >perhaps a good solid reasonably high power op amp buffer feeding > >resistors to each output to each piece of gear? Anyone done this and > >found any "gotchas" or success stories? > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
