450 W 2m Power Amplifier with Gi7B-Triode
Features:
- Pin-Diode HF Switch, no coax-relay and no sequenzer
needed.
- Pin-Diode Switch can be mounted on PA or at the Antenna ( with two coax-cables
for RX and TX)
- CPU-Controlled Input-Power, Output-Power and SWR-Protection
- CPU-Controlled Switch-on delay for filemant and highvoltage
- Idle current can be switched of during rx or for FM oder WSJT
Pictures:
Cavity
|
Socket
|
Output
matching 
|
| CPU-Controller and Powersupply
|
Highvoltage-Powersupply 2000V
/ 0,5A
|
Input matching
|
| Cavity
|
Top view
|
Rear view
|
first test on the antenna
|
Powertest on my Dummyload
|
Final test
|
Input[W] |
Output[w] |
Gain[dB] |
2,1 |
29 |
11,4 |
4,1 |
71 |
12,38 |
5,1 |
93 |
12,61 |
7 |
129 |
12,65 |
10 |
185 |
16,67 |
12,4 |
222 |
12,53 |
14 |
249 |
12,5 |
15,3 |
268 |
12,43 |
16 |
278 |
12,4 |
17,2 |
295 |
12,34 |
18,6 |
313 |
12,26 |
19,3 |
322 |
12,36 |
19,9 |
331 |
12,21 |
20,6 |
340 |
12,18 |
21,4 |
347 |
12,1 |
22,2 |
355 |
12,04 |
23,7 |
370 |
11,93 |
24,5 |
375 |
11,85 |
25,3 |
381 |
11,78 |
26,1 |
389 |
11,73 |
27,9 |
397 |
11,53 |
28,7 |
406 |
11,46 |
30,5 |
415 |
11,25 |
32 |
425 |
11,23 |
33 |
432 |
11,17 |
35 |
445 |
11,04 |
36 |
450 |
11,02 |
37,3 |
455 |
10,87 |
technical data:
P[max] = 450 W
Ua = 1950 V
Ia = 375 mA
Ig = 40 mA
Ug = 25 V
Pdiss = 280 W
Efficiency = 62,5 %
technical documentation:
Zener-Diode replacement + High-Voltage
FET-switch
Power and PTT
Triac-switch
CPU-Board with 16F876A
144
MHZ low-pass filter
Pin-diode
RF switch
