Re: New AGC mod #ubitx
¿ªÔÆÌåÓýI used that same line of thought, but replaced Q10 in the uBITx with a dual gate FET¡ the second gate doing exactly what your Q2 does.? The advantage is that there is no loss¡ and in fact the FET has more gain than the 2N3904.? My AGC generation is a little more sophisticated too¡ variable RF gain and integration time (variable AGC time reaction) and a filter¡ but the idea is the same. ? ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ ? Owner - Operator Big Signal Ranch ¨C K9ZC Staunton, Illinois ? Owner ¨C Operator Villa Grand Piton ¨C J68HZ Soufriere, St. Lucia W.I. Rent it: Like us on Facebook! ? Moderator ¨C North American QRO Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] [mailto:[email protected]] On Behalf Of Don, ND6T via Groups.Io ? I have a new, low insertion loss (0.6 dB), wide dynamic range (>50 dB @ 3.5 MHz, 34 dB @ 30 MHz) and fairly simple design. It works! The particulars are posted on . 73, Don |
K9HZ