Utah Amateur Radio Club
 
Photos from Homebrew Night,
October 8, 2015
 

Once each year a UARC meeting is devoted to letting folks who have built “homebrew” equipment show it off to the group.

Photos by Ron Speirs, K7RLS

(Click on any image, then click again or press “+” (depending on your browser) for a higher resolution version.)

K7RLS CLock
Ron Speirs' clock, built with SSI gates many decades ago, has new life with LEDs instead of incandescent bulbs.

 
  K7RLS Clock rear
The inside of Ron's clock. It took many ICs to do the job in those days.

 
  mechanical clock in a box
Chuck Johnson, WA7JOS, “built a clock.”

 
  Closeup of clock


 
  Suitcase
Bruce Fereday, KF7OZK, packaged batteries and an HF transceiver for his son who wants backpackable HF.

 
  Army-style backpack
Here Bruce shows the kind of backpack that could be used.

 
  box with connectors and resistors
Dave Deelstra, N7ISH, built a QRP dummy load for $10.

 
  circuit board
Morris Farmer, AD7SR, used a fancy IC to simulate the “ideal diode,” i.e. no forward voltage drop. It can be used to isolate multiple batteries being charged simultanesly.

 
  schematic diagram
The schematic for Morris' charger

 
  Box with banana jacks
Jack Dolcourt, WA0PFC, converted a PC power supply for 13-volt service.

 
  black case holding batteries
Doralee Olds, AF7SD, put batteries together with charger and voltmeter in a portable package.

 
  Michael holding circuit board
Michael Colton, KE7HIA, shows a board from his “pocket SDR,” a pocket-sized HF transceiver using software-defined-radio technology. He hopes to mass produce and market the device.

 
  Metal box with power switch, pilot lights, and “Charge Power” label
UARC President Clint Turner, KA7OEI, built a portable package that can power a 100-watt SSB transceiver. He combined D-cells, which have a surprisingly high amp-hour rating, with about 58 farads worth of capacitance, which can supply high peak currents.

 
 

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