Tek 555 was Re: Need pointers on Oscilloscopes

[Jim Beacon]

Christian,

can you tell me what the small monitor scope in the picture of the 555 is?

Thanks

Jim.

PS - get some 1A1 amplifiers, they don't drift like the CA's, and you get
ground position on the input switch :-)


----- Original Message ----- 
From: "Christian Corti" <cc at corti-net.de>
To: "General Discussion: On-Topic and Off-Topic Posts"
<cctalk at classiccmp.org>
Sent: Friday, June 09, 2006 9:13 AM
Subject: Re: Need pointers on Oscilloscopes


> On Fri, 9 Jun 2006, Tony Duell wrote:
> > Don't get me wrong, I love my old Tekky 555, but I really don't think
> > this sort of instrument is good for a beginner who doesn't want to learn
> > how to repair valve circuitry and 'scopes in general. They are very
> > maintainable, and the manuals are excellent, but since they're over 40
> > years old, you are going to have to do some work on them.
>
> My experiences with a 555 are *very* good. Found one on a scrap heap three
> years ago, and someone picked the power valves (and the funny diode
> 2AS15-A) and their sockets out of the power supply (and cut the wires). It
> took me some time to get replacement valves and rewire the power supply
> around the sockets, but in the end, the scope worked like a charm! The
> traces (it's a real dual beam, not dual trace) are sharper and finer than
> everything else I've seen so far (mostly "modern" equipment like Hamegs or
> HPs). We use it here e.g. to adjust the heads on RK05 drives or to measure
> the signals on our LGP-30s (we have two working now!).
> (Some pictures are on http://computermuseum-stuttgart.de/dev/tek555, you
> can click on the pictures to see more)
>
> Christian
>
>
>
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