A 60 meter SSB transmitter. Nick Kennedy, WA5BDU OzarkCon, Joplin MO April 29, 2006. Introductory inspirational quotes. Thoughts from JF1OZL’s homebrew web page:
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Nick Kennedy, WA5BDU
OzarkCon, Joplin MO
April 29, 2006
Thoughts from JF1OZL’s homebrew web page:
Some of the successful projects was born from the failed idea. We have the proverb ," Failure is the mother of the success." in Japan. You may write your notebook not to record your successful projects, but raise your new idea.
Why I make my rigs by myself:
Sometime I receive the question " Why do you make your rigs by yourself?". I can not answer the question. The man making such question thinks as follows. It cost only about $500 to buy cheap rigs. It cost about $1000 to buy some test equipment. I can understand what he says. But I want to say as follows. The purpose of Amateur radio is to spend money and to spend times. It makes no economical profit to the station manager. To make high tower costs very high . To make shack on the mountain costs high . To go to expedition cost very high. And also to make my original rig costs very high. It is the way of Amateur life.
From Frank Harris’ on-line book: Crystal Sets to Sideband, Chapter 15: The Nobel Prize for Sideband:
Getting on 60 meters SSB - don't bother!
Before the 60 meter SSB frequency became available to American hams on July 4th 2003, I thought it would be fun to get on the air before the commercial gear was on the market. I naively thought that homebrewers would own the frequency for at least a little while. What I didn't know was that some of the newest transceivers can be reprogrammed to operate on any HF frequency just by pushing some buttons. Anyway, The band was instantly clogged with commercial transceivers.
5-p crystal filter
NE602 transmit mixer
LM387 40dB speech amp & clipper
9 MHz carrier osc
Class A TN2219A 20 dB to +9dBm
Class A RCA4013 15 dB to 100mW out
Class AB 2N3866 push-pull to 1 watt
Class AB 2SC2075 push-pull to 5 watts
5 element LPF; Fco = 5.75 MHz
6 MHz LPF
60 meter SSB transmitter block diagram
NE602 (SA612) equivalent schematic
Comparison of MC1496 & NE602
Wide bandwidth look at inductance compensated filter (LTSpice simulation)
Narrow look at filter without compensation (note LSB shape) (LTSpice simulation)
Wide view of filter without compensation-- good wideband attenuation (LTSpice simulation)
In ten separate pieces ; nine boxes