Tek 555 was Re: Need pointers on Oscilloscopes

[Tony Duell]

> I have a couple of small scopes, for example the Cossor 1039 here:
> 
> http://www.g1jbg.co.uk/test8.htm
> 
> which has three valves as well as the CRT, and was intended for TV service.

Somewhere I have the issue of Practical Television magazine which gives 
construction details for a 1 valve + CRT scope. OK, there are some 
semiconductor rectifiiers in the PSU too. The valve is for the timebase, 
the Y input goes straight to the CRT plates. But it was useable for the 
signals in vavle TVs of the time, and a lot better than nothing.

> really like is a 549, if anyone with in a 100 miles of London has one they
> no longer want :-)

Woudln't we all :-)

-tony