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Date Posted by Category User IP

2012-11-07 (UTC)

UA3QLC

Amplifier Parts

LPF diplexer for 1 KW HF PA 1.8 - 30 MHz

The diplexer consists of 6 relay-switched units and covers 1.8 to 30 MHz amateur radio bands. It has 1 input port and 6 antenna outputs, so no additional ant-switch is needed. Outputs can be connected in parallel for multiband antenna (say 10-15-20 meters tribander)
The cores are T130 and T50 by Micrometals, relays are 16 Amps TRA2 12 VDC, capacitors are MuRata GRM42A SMD high voltage 3.15 KV and several mica units (on 160 meters HPF), connected in parallel to meet the hi-power requirements. The load is 24pcs 2W each resistors. FR4 double-sided PCB size 230x170 mm.
The filters are carefully tuned on each band to get the SWR as low as 1.2:1 .
Price is $300 plus shipping.
Will ship worldwide.

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