If anyone has some old Practical Televisions, I can recall adverts for tube
rejuvenators which claimed to be able to make television tubes work again
after they had gone low emission.

Then there were endless projects In Practical Wireles for things like Valve
ohm meters, and grid dip oscillators.


In some later television mags, when valves were being phased out, some
enterprising folk actually made valve replacements circuits using
semiconductors on a valve base!

As I recall, one flashover and they were history.

grin.

Brian

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Brian Gaff -
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"Ian Bell" wrote in message
...
Don Pearce wrote:
Interesting insight into the way things were in the 60s - I've just
been reading a Wireless World from November of that year. Valves
(tubes for those across the pond) were extremely cheap. And
transistors cost pretty much the same, which is why we treated them
with kid gloves and thermal shunts when soldering them into circuits.

http://www.soundthoughts.co.uk/look/valves.jpg

Money conversion for the young and foreign:

20 shillings to the pound, 12 pence to the shilling. A price given as
5/6 meant five shillings and six pence. So an ECC84 at 6/6 is 32.5
pence in today's money. A 28012 transistor, by contrast at 140/- is
seven pounds - getting on for half the weekly wage of some people back
then.

I may post some ads for complete equipment later, just to make you
cry.

d


I have some WW from 1940 to 46 - I'll see if I can find a camparison page.

Cheers

Ian