Hi I still think that a distribution amp based on logic ic's is cheaper / simpler / lower power / higher performance. A pair of NC7SZ125's will dump 20 dbm into 50 ohms all day long running at 5.5 volts. Good isolation as well. Do the lowpass filter right and the harmonics are not an issue. Two coils / one cap plus dc blocking does it quite nicely.
Bob On Aug 9, 2013, at 4:44 PM, Charles Steinmetz <[email protected]> wrote: > Bob wrote: > >> The original design with 3x75 ohm outputs would be driving a 50 ohm load >> rather than a 33 1/3 ohm load. That would put it "in spec" for the CLC409 as >> opposed to just out of spec current limit wise. > > Right. Analog video generally ranges from 0 to +1 V, so as a DC-coupled > video amp the peak current into 3x75 ohm loads would be +40/-0 mA. Very > comfortably within the capability of a CLC409. > > A friend recently brought me another commercial video DA, which I'm helping > him modify for use as a 1/5/10 MHz DA. It uses EL2099 video drivers, which > are specified to provide 440 mA (typical -- 360 mA minimum) of output > current. This part should be able to drive 12 or more parallel > back-terminated 50 ohm loads to +13 dBm, if desired. (Like the CLC409, the > EL2099 is obsolete/NLA.) > > Best regards, > > Charles > > > > _______________________________________________ > 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.
