Lavoie LA-265A: Difference between revisions

From TekWiki
Jump to navigation Jump to search
No edit summary
No edit summary
Line 20: Line 20:
Image:LA265A_1.jpg|Lavoie LA265A with Lavoie LA-265CA Plugin
Image:LA265A_1.jpg|Lavoie LA265A with Lavoie LA-265CA Plugin
Image:LA265A_2.jpg|Terminals with tin-plated steel insert
Image:LA265A_2.jpg|Terminals with tin-plated steel insert
Image:LA265A_HV.jpg|Schematic of HV-Supply, glow stabilizer
Image:LA265A_HV.png|Schematic of HV-Supply, glow stabilizer
</gallery>
</gallery>

Revision as of 12:32, 19 February 2014

The Lavoie LA-265A is a 33MHz scope that takes letter-series and 1-series plug-ins. It has two timebases, which allows delayed triggering. It is a military cloned Tektronix 545A.

Electrical difference to 545

The high-voltage circuit is identical to that of the Tektronix 545A. Glow lamps are used to stabilize the high voltage in brightness circuit. However, the glow lamp stabilizer is often faulty. The lamps aged too fast, with the result that the trace flickers.

Mechanically difference to 545

The transformer is potted. Unlike Tektronix instruments of the same era, which require silver-bearing solder, ordinary solder is fine for working on the Lavoie. This is because the terminal strips in the Lavoie have tin-plated steel inserts.