On 11/4/2016 4:04 PM, Poul-Henning Kamp wrote:
Historically resonance cavities were used so that step/avalance diode multipliers had enough power to excite them. Today we have semiconductors which work at those frequencies.
A great deal of complexity in the 5061 went into exciting an SRD at 90 MHz and getting a sufficient line at 9180 MHz to put on a sideband at 9192. I spent a lot of time trying to do this during the 5071 project and was never able to get anywhere near the efficiency that the 5061 waveguide structure was able to do. It was designed by a visiting Korean professor, so he wasn't around to mentor me. The 10816 also used an SRD, and it was also a struggle, although I was able to make it work. Fortunately, we were able to replace all this with a DRO and PLL, and that was 25 years ago. At this time, it is even more of a no brainer that you don't want to knock yourself out trying to make an SRD multiplier work. Also, these days, it is harder than ever to purchase good SRD's. Rick _______________________________________________ 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.
