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* [http://w140.com/LA265A.pdf Lavoie LA-265-A Manual (PDF)] | * [http://w140.com/LA265A.pdf Lavoie LA-265-A Manual (PDF)] | ||
}} | }} | ||
The '''Lavoie LA-265A''' is a 33 MHz scope that takes | The '''Lavoie LA-265A''' is a 33 MHz scope that takes [[letter-series and 1-series plug-ins]]. | ||
[[letter-series and 1-series plug-ins]]. It is an unauthorized clone of a | It is an unauthorized clone of a [[545|Tektronix 545A]] made for a defense contract by [[Lavoie Laboratories]]. | ||
[[545|Tektronix 545A]] made for a defense contract by [[Lavoie Laboratories]]. | |||
It has two timebases, which allows delayed triggering. | It has two timebases, which allows delayed triggering. | ||
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The high-voltage circuit is not identical to that of the Tektronix [[545|545A]]. | The high-voltage circuit is not identical to that of the Tektronix [[545|545A]]. | ||
Neon lamps are used to stabilize the high voltage in brightness circuit. | Neon lamps are used to stabilize the high voltage in brightness circuit. | ||
However, the neon lamp stabilizer is often faulty - the | However, the neon lamp stabilizer is often faulty - the lamps aged too fast, with the result that the trace flickers. | ||
lamps aged too fast, with the result that the trace flickers. | |||
=== Mechanical difference to 545 === | === Mechanical difference to 545 === | ||
The mains 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, because its terminal strips have tin-plated steel inserts. | ||
silver-bearing solder, ordinary solder is fine for working on the Lavoie | |||
==Links== | ==Links== |