"Dave Plowman (News)" wrote in message
...
In article ,
David Looser wrote:
Those sort of output impedances were common in valve days. Use a video
or RF coax to your requirements. Maplin sell a range by the metre.


Hence the DIN idea of using a low input impedance at the other end of
the cable. A pretty crap idea (IMO) but as a way of reducing the HF
loss from cable capacitance it worked.

But only if you have an even lower source impedance. ;-)
Easy to do with transistors. With valves you need an extra stage.


Err.. no. The DIN system worked with high output impedences and low input
impedances. There was, of course, significant signal attenuation in so doing
with consequent S/N ratio implications, but it did reduce the HF loss due to
cable capacitance.

David.