Making towers
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- Written by: Jari Ojala
- Category: Uncategorised
- Hits: 307
Powered by Yaesu equipments
FTDX101MP
FT-1000MP MarkV
GU84b Linear
2xBLF188 LDMOS Amp
uu
N1MM logging software
Touchscreen rotator control by OH8FTF
Stubs for SO2R
- Details
- Written by: Jari Ojala
- Category: Uncategorised
- Hits: 334
Radio amateur station OH8LQ has four rotating masts, three 42 m high and one 30 m high. The masts can be used together or separately at the same time.
Mast 1
5 el 15 m yagi stack
4 el 10 m yagi
5 el 20 m yagi
160 m dipole
Mast 2
80 dipole
Mast 3
16 o 16 2 m yagi
6 el 6 m yagi
5 o 5 10 m yagi
5 o 5 15 m yagi
5 o 5 20 m yagi
2 o 2 40 m shorty yagi
Mast 4
2 o 2 40 m shorty yagi
160 m guy wire slopers
80 m 4 SQ system
- Details
- Written by: Jari Ojala
- Category: Uncategorised
- Hits: 409
3 kW linear amplifier with four ART1K6 LDMOS fets
Circuit boards of the RF part
Drilling holes in copper plate
Fets soldered in a cooling plate
Two RF modules with a heatsink
Each module is tested separately
Four modules with cooling plates and combiner and divider
RF amplifier unit and power switches
UI at rear panel
Simulation vs. real world
Diplexer looks good!
20 m Diplexer
Output without diplexer
With diplexer.... 3rd harmonic -50 dB@ 2 kW...
Dummy load spectrum
SWR sensor
9 kW 50 V three-phase power supply
Power connectors
Power switch
Control board
Arduino controller on board
TFT-touchscreen UI
Power switch V2.0
EMI-filter
TO BE CONTINUE....