Lavoie LA-265A: Difference between revisions
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The lamps aged too fast, with the result that the trace flickers. | The lamps aged too fast, with the result that the trace flickers. | ||
== | == Mechanical difference to 545 == | ||
The transformer is potted. | The mains transformer is potted. | ||
Unlike Tektronix instruments of the same era, which require | Unlike Tektronix instruments of the same era, which require | ||
silver-bearing solder, ordinary solder is fine for working on the Lavoie. | silver-bearing solder, ordinary solder is fine for working on the Lavoie. | ||
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<gallery> | <gallery> | ||
Image:LA265A_1.jpg|Lavoie LA265A with Lavoie LA-265CA | Image:LA265A_1.jpg|Lavoie LA265A with Lavoie LA-265CA Plug-in | ||
File:Lavoie ca plugin.jpg|Lavoie CA Plug-in | |||
Image:LA265A_2.jpg|Terminals with tin-plated steel insert | Image:LA265A_2.jpg|Terminals with tin-plated steel insert | ||
Image:LA265A_HV.png|Schematic of HV-Supply, glow stabilizer | Image:LA265A_HV.png|Schematic of HV-Supply, glow stabilizer | ||
</gallery> | </gallery> | ||
Revision as of 11:40, 22 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 not 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.
Mechanical difference to 545
The mains 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.
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Lavoie LA265A with Lavoie LA-265CA Plug-in
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Lavoie CA Plug-in
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Terminals with tin-plated steel insert
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Schematic of HV-Supply, glow stabilizer
