On 14/11/2016 12:01, Jim Lesurf wrote:
In article , Graeme Wall
wrote:
That said, the closest I've got to the this was water-cooling of 100
GHz klystrons.


With or without goldfish?

We always felt it was cruel to use goldfish to check that the water flow
was on. So we used to use a small sphere of plastic that revolved around a
circular racetrack attached to the pipes.


On my Evesham course (back in the dark ages) we were told that the water
cooling systems at TX sites had goldfish to prevent the build up of
algae. The Senior site engineer was supposed to get an allowance for
goldfish food. Never discovered whether the goldfish were issued with
BBC staff numbers.


--
Graeme Wall
This account not read.