On 8/12/19 2:26 pm, Fred Erickson wrote:
> I have had troubles in the past with cheap, prolific based cables

I think this must be the problem. I bought a second cable from a
different supplier, but it is identical to the first and it doesn't work
either. I'll see if I can find a supplier for the suggested BTech PC03
cable.

Thank you everyone for your suggestions.

--

Regards,
Phil