List,   There has been a lot ofinformation on the list for 5 MHz frequency doublers.   As it is easier for me to buythan make, would using something like a Mini-Circuits surplus DBM’s be anacceptable way to go?   Regards,   Perrier 

The 5071A doublers I designed use MCL ASK-1 mixers. The LO and RF ports are connected in series. This arrangement is self limiting. So you drive them fairly hard and the output is level. The IF port needs to see a DC short circuit of course. This was essential in the 5071A since there were 5 doublers in cascade. The input impedance is about 30 ohms and you need a fair amount of drive, like 30 mA peak to peak. I tested and rejected other approaches like putting the ports in parallel or driving them with a quadrature hybrid. The series connection just worked better. It's going on 25 years, but this is what I remember. The filtering is another non-trivial story. Buying DBM's doesn't make that job any easier. Rick Karlquist N6RK On 4/12/2015 3:10 PM, Perry Sandeen via time-nuts wrote: > List, > > > > There has been a lot ofinformation on the list for 5 MHz frequency doublers. > > > > As it is easier for me to buythan make, would using something like a Mini-Circuits surplus DBM’s be anacceptable way to go? > > > > Regards, > > > > Perrier > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > >