G4BAO driver amplifier
Posted: Fri Apr 06, 2018 8:42 pm
John G4BAO has recently posted the following:
My new 3W SSB/CW, 500mW DATV 70cm driver board kit is now available.
See www.g4bao.com for details and how to order.
Please make sure you use the ordering email oscarmax42@ntlworld.com for PayPal! Otherwise your money will go in to a black hole, never to be seen again and you won't get a kit!
G8GTZ says:
I have tested one of these on the output of a Portsdown with a 3dB pad in circuit and can confirm they will produce +27 dBm (500 milliwatts) with 30 dB shoulders (as shown in the picture) so make a very useful driver or low power PA stage for DATV.
Without the pad it produces +29 dBm but with 25 dB shoulders so it advised that the Portsdown is always used with a 3dB attenuator or long piece of co-ax before the amplifier.
My new 3W SSB/CW, 500mW DATV 70cm driver board kit is now available.
See www.g4bao.com for details and how to order.
Please make sure you use the ordering email oscarmax42@ntlworld.com for PayPal! Otherwise your money will go in to a black hole, never to be seen again and you won't get a kit!
G8GTZ says:
I have tested one of these on the output of a Portsdown with a 3dB pad in circuit and can confirm they will produce +27 dBm (500 milliwatts) with 30 dB shoulders (as shown in the picture) so make a very useful driver or low power PA stage for DATV.
Without the pad it produces +29 dBm but with 25 dB shoulders so it advised that the Portsdown is always used with a 3dB attenuator or long piece of co-ax before the amplifier.