SKY 65135 +30dBm Driver

[G0LJF]

Hi,

I use one of these as a driver - they can deliver about +30 dBm at 2.4 GHz.

However, I was using the "enable" pin on the PCB to switch the whole thing on and off.

I noticed that the amplifier output rose by about +1.6dB over a minute of operation and investigated why.

Anyhow, the enable pin simply enables an on board voltage regulator for the bias and RF power/temperature levelling circuits. This needs time to settle.

DON'T use the enable pin is my advice.

73, Mike

[Jabi]

One qestion, sir: how enable the Pin? manually?
73,s de Jabi, ea2aru.

[G0LJF]

Hi Jabi,

Just take the enable pin to > +3V. An RT9193 is used on mine ("Novate" boards).

RT_9193.pdf

(177.05 KiB) Downloaded 164 times

Wire it permanently to the +5V. That is OK.

Please do not switch it with Portsdown (unless you like the gain to vary over two minutes - like an old Valve heating up).

73, Mike