KN36JN
IARU R1 UHF 2023 contest
Hamradio is all about having fun !
CQ de YO8SHU & YO8RXP @ YRØK
Everything at our fingertips !
2 cars, 2 men. One crib, one transceiver, one laptop ! We got covered, aint it ? Nope ! We just realize we need antenna system also, cannot do radio without it, hi hi !
From the inside
Antenna system
A modest but yet effective 4 x 5 elements antenna system was built for 432 mhz only.
Impedance adapter
4 x 37 ohms adapters were needed to increase each antenna 28 ohms to 50 ohms impedance
4 x 50 ohms splitter
2 x 3 lambda/8 adapters were neded to transform each 2 antenna set from 25 to 100 and back to 50 ohms as a whole.
Radio tower
Radio tower is just a tower with a radio on top, right ? 9 meters aluminium telescopic mast was used, with a special ball bearing and flange to support guy ropes
Transceiver
An old FT-897D with 20 W output was used. During contest, coaxial developed a crack and got severed. Not having extra connectors, we soldered it ugly style but SWR raised up to 1.6, so output power decreased a bit.
Miscellaneous
Good mood, good food, good drinks. Quite windy, the shed had to be re enforced and some small rain in the morning. Quite a pleasant day I would say !
