Probably Windows 11 update related. Twice this morning my VarAC "froze" during a QSO, something that has never happened before.
Symptoms are the VARA HF audio input drops to zero and says disconnected.
The Windows 11 update is this one, updated today.
2023-04 Cumulative Update for Windows 11 Version 22H2 for x64-based Systems (KB5025239)
Vara HF version 4.7.6
VarAC version 7.0.8
Anyone else suffering from a dropped connection and a frozen program?
73 Dave G4AON
To recap, my VarAC was locking up, or at least my Vara modem program was. It had been working perfectly until around 2 weeks ago.
My desktop PC is a Dell Optiplex running Windows 11 Pro, new in Jan 2023. My laptop is an Asus Vivobook also running Windows 11 Pro. Both had exactly the same Windows/VarAC/Vara software versions and exactly the same versions of sound card drivers (Windows generic).
The Dell had problems driving my Elecraft K4D, but the Asus didn't.
The Dell would drive my other radio, an Icom IC-7300 without a problem, as did the Asus.
The problem was eventually resolved by deleting the Dell Windows sound card driver and "updating it" with an identical replacement version. The current working version is 10.0.22621.608 from 27/09/2022 and is the same version on the laptop,
73 Dave