.............................................ICW............................................

Thursday, October 18, 2012

2m/70cm/23cm Low noise Amplifiers

 Here, 3 Low noise amplifiers Outdoor unit with DB6NT parts
completed.
- 144 Mhz: 26dB - 0,35dB NF
- 432 Mhz: 23dB -  0,4dB NF
- 1296 Mhz: 36dB - 0,7dB NF
- (on bench) 432 Mhz and 2320 Mhz: with MGF4919G, ATF54143 Inspired by the model of G4DDK


January 31, 2013: 23cm Preamplifier done ! (it will be installed directly on the RX port of septum feed, and 3 Meter MESH DISH (F/D=0.4). 
Made in RD Congo

November 08, 2012: 70 cm Preamplifier done ! (made in RD Congo)
(it will be installed directly near the coupling of four antennas 25 el.). 
September 25,2012: 2m Preamplifier and QRO coaxial relays in a RF box, done!
(it will be installed directly near the coupling of four antennas 16 el.)

For 2m operation ; Parts used:
- RF aluminum waterproof enclosure.
- Transmit Coaxial relays EME HF 4002/3-7/16 (see specifs below)
Receive Coaxial relays TOHTSU CX-140D  @ 150 Mhz : Cross-talk suppressor: 51dB; Insertion   loss: 0,1dB; Switching time: 12 ms  ../..
- Transmit Coaxial cable RG393/U @ 150 Mhz :Power handling:  3.7 Kw ; Attenuation: 0.09dB/m; 
- Receive semi rigid Coaxial cable Multiflex UT141-50
- 50 Ohms termination
- Preamplifier KHUNE DB6NT MKU LNA 144A (specifs installed : 26,5 dB- noise 0,35 dB)
- Connector XLR male (control from TX/RX sequencer) 
- RF connectors 7/16 female.