A dud mixer fir 5760 mhz with filter and amplifier the kk7 b mixer used a "4 h rat race coupler, so the next version, shown in the photograph of fig 2, used this
Methods in rf design2 by w7 zoi, kk7 b and w7 pua, recently published by arrl. if you do not own a copy of these, hf transceiver — and get competitive performance! h
A power meter based on the ad 8307 from analog devices. (kk7 b logged over a dozen countries with a crystal set from the upper peninsula of michigan.)
44 march 1999 i built this little receiver to illustrate an idea that i’ve been exploring for a number of years. it replaces the narrow filters and inteference fight
Coherent cw is a communications mode based on precise code timing and frequency stability to provide campbell, kk7 b design for two main reasons.
April 17, 1999 c:\myfiles\manuals\kk7b\binaural rx\construction construction notes kk7 b binaural receiver check to be sure all the parts that are in the
“analog signal processor”, as rick kk7 b calls it :o). (otherwise known as audio phase shifters and summer circuits).
Kk7 b. portland state university electronic component vending machine run by ieee student store hard rock experimental radio hard rock block diagram. the modules:
Direct conversion receiver from kk7 b! by rick campbell, kk7 b all that is needed to make a complete high performance direct conversion receiver is an
Rick campbell, kk7 b: and others, the x band ( eo ghz) pans need to be tuned up preferably with a spectmrn analyzer [hat works through ghz.' to give
Rick campbell, kk7 b; and others, the x band (10 ghz) parts need to be tuned up— preferably with a spectrum analyzer that works through to give you an
Vhf experiments or “putting the tech back on the technician bands” rick campbell kk7 b note page numbers for questions 1
Rick campbell, kk7 b a corvette). modern radios have several thousand parts — over a hundred on back order at any given time. even for those who
Campbell, kk7 b, which was further discussed and represented by heinz sarrasch, dj7 rc. block diagram of dc receiver . 11 circuit design and realization
In a multiband front end for a direct conversion receiver such as the r2 pro1. a kk7 b did something similar in the classic binaural receiver, using a 1 k pot at the
The rest of the radio is based on kk7 b’s phasing method receiver and transmitter designs the “r2” and the “t2”.
Q) § em comm in focus: o w~ the well oiled baltimore county >~ auxiliary communications service " 0 . q) ~ he september 2009 public service column,
Evolution of 40 meter cw transceiver • universal vfo (uvfo) design (kk7 b) • ~60 khz tuning range (bottom end of 40 m) • i and q outputs for a receiver
Kk7 b . board with the addition of power amplifiers and a low noise preamp. note. add bypass capacllors and le rrl le beads on all wires
They never told me not to an innocent is seduced by centimeter waves laura halliday ve7 ldh abstract microwave communicationson phase 3 d promise
Transmitter and receiver hartley phasing receiver see rick campbell kk7 b's work. single sideband requires precise phase shift network requires two mixers sin cos
Dn0 xx to be used for the dem432 and 432 k (original kk7 b version 3 board design)
Rick campbell kk7 b 30 mar 2009. rcx2 144 mhz to 7 mhz receive converter parts list rick campbell 9/20/09 c1 15 p f pc mount air variable