25 Aug
2006
25 Aug
'06
6:46 p.m.
Just copied last AO-51 pass. TXa is .3 watts TXb is .4 watts tx current draw is 800 mA panel output is 15.1 v, 1193.9 mA
I wonder what all is included in TX current, since even if the bus is an 8 volt bus, that is over 6.5 watts of DC power to produce only .7 Watts of RF or about 10% efficient? But I am sure this is not the whole story. So I shouldn't speculate...
The Hamtronics transmitters in PCSAT's draw about 500 mA to produce 2 Watts from the 12 volt bus and this is about 33% efficiency.. I think some of the HELAPS designs produce much higher efficiencies... Bob