Transmit Line up which Works!
Posted: Fri Jun 28, 2019 12:31 pm
DRIVE AMPS FROM LIME TO SPECTRIAN
At last I have my system putting pictures through Oscar 100! My Spectrian produces around 50 watts and has the Ebay '8 watt' as a driver .The 8 watt amplifier as most know only produces 2- 2.5watts ....I am running this at 500mW to 1 watt max into the Spectrian. All this is located at the end of 15 M of low loss coax ..around 8dB at 2400.
At the other end, in the shack ..I have my Lime ..running from the Portsdown at a Lime gain between 62 and 74 ....this then feeds into a pair of Ebay 'Black Amplifiers' ( there seem to be 2 varients of this amp on the market some give around 12-15dB at 2400 the other gives nearer to 20dB) ..With Lime gain of 70 this will drive the Spectrian to about 20 watts .. As it is recommended to run the Lime as low as possible I use a second '8watt Wifi amp' in the shack with around 600mW output which in turn drives the 'ground station' to full power with Lime at 60-64 gain.
So in conclusion 2 off 8 Watt Wifi providing 13dB gain each. 2 off Ebay Black amps giving 15+dB gain each overall system gain 55-60dB minus 8dB cable loss
Hope that this is of help / interest G4UVZ
At last I have my system putting pictures through Oscar 100! My Spectrian produces around 50 watts and has the Ebay '8 watt' as a driver .The 8 watt amplifier as most know only produces 2- 2.5watts ....I am running this at 500mW to 1 watt max into the Spectrian. All this is located at the end of 15 M of low loss coax ..around 8dB at 2400.
At the other end, in the shack ..I have my Lime ..running from the Portsdown at a Lime gain between 62 and 74 ....this then feeds into a pair of Ebay 'Black Amplifiers' ( there seem to be 2 varients of this amp on the market some give around 12-15dB at 2400 the other gives nearer to 20dB) ..With Lime gain of 70 this will drive the Spectrian to about 20 watts .. As it is recommended to run the Lime as low as possible I use a second '8watt Wifi amp' in the shack with around 600mW output which in turn drives the 'ground station' to full power with Lime at 60-64 gain.
So in conclusion 2 off 8 Watt Wifi providing 13dB gain each. 2 off Ebay Black amps giving 15+dB gain each overall system gain 55-60dB minus 8dB cable loss
Hope that this is of help / interest G4UVZ