PD4 RTLSDR V4 driver and Bias-T

[KA5BBC]

I tried my RTLSDR V4 in the RTL-FM receiver menu and found that it would not receive anything.

I borrowed a V3 and it worked.

I am assuming that this is a driver issue between the two versions.. is there a fix?

Is there a way to turn on/off the Bias-T voltage for external filters and amps?

Also, the volume is far too high for my speakers, is there a volume control for this section?

[G8GKQ]

The RTL-SDR V4 uses different drivers and is not supported by Portsdown.

The facility was designed to be used with external computer-style speakers with a hardware volume control, so it is fixed volume.

Dave