05-05-2026, 09:05 AM
Ah, the 13A. A hernia hiding in an oscilloscope. Built out of girders.
I had one. £25 back in 1970ish.
Dreadful thing. Uncalibrated Y & X.
Y2 channel is invert wrt Y1 which is a bit confusing.
Cathode follower probe for "HF" measurements (it runs out of steam at about 4.5MHz only achieved in single channel mode: no Y2 then).
There's an article in WW from about 1970 describing how to "improve" it a little.
The original Boatanchor of oscilloscopes.
I built a trolley for mine. Said trolley still lives in next door's car port, whereas the 13A resides in bits in mine.
I had one. £25 back in 1970ish.
Dreadful thing. Uncalibrated Y & X.
Y2 channel is invert wrt Y1 which is a bit confusing.
Cathode follower probe for "HF" measurements (it runs out of steam at about 4.5MHz only achieved in single channel mode: no Y2 then).
There's an article in WW from about 1970 describing how to "improve" it a little.
The original Boatanchor of oscilloscopes.
I built a trolley for mine. Said trolley still lives in next door's car port, whereas the 13A resides in bits in mine.
