There are some problems with snow effects on some BBC Master’s using the internal PiTubeDirect Signal Converter for the Master.
The ones connected to the external tube works fine.
It seem like are different version of chips in the Master causing the problem, but this need to be investigated.
To see if you have this problem run the program below and see if you get the snow effect.
10 MODE 0
20 GCOL 0,129
40 GOTO 40
Will investigate and find a solution for this. There may be more that needs to be fixed.
All people that have bought the Master version and have this problem will get a new card.
Since this is a “hobby” I would just ask to get back the cost of shipping the replacement.
I estimate to have new cards ready some time in January for shipping.
Hope nobody gets any problems with their Masters after this.