Lavoie LA-265A: Difference between revisions
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The Lavoie LA-265A is a 33 MHz scope that takes | The '''[[Lavoie Laboratories]] LA-265A''' is a 33 MHz scope that takes | ||
[[letter-series and 1-series plug-ins]]. | [[letter-series and 1-series plug-ins]]. | ||
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It is a military cloned Tektronix [[545|545A]]. | It is a military cloned Tektronix [[545|545A]]. | ||
== Electrical difference to 545 == | ==Internals== | ||
=== Electrical difference to 545 === | |||
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]]. | ||
Glow lamps are used to stabilize the high voltage in brightness circuit. | Glow lamps are used to stabilize the high voltage in brightness circuit. | ||
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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 == | === 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 | ||
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This is because the terminal strips in the Lavoie have tin-plated steel inserts. | This is because the terminal strips in the Lavoie have tin-plated steel inserts. | ||
==Manuals== | |||
* [http://w140.com/LA265A.pdf Lavoie LA-265-A Manual (PDF)] | * [http://w140.com/LA265A.pdf Lavoie LA-265-A Manual (PDF)] | ||
==Pictures== | |||
<gallery> | <gallery> | ||
Image:LA265A_1.jpg|Lavoie LA265A with Lavoie LA-265CA Plug-in | Image:LA265A_1.jpg|Lavoie LA265A with Lavoie LA-265CA Plug-in | ||
Revision as of 00:18, 2 September 2014
The Lavoie Laboratories LA-265A is a 33 MHz 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.
Internals
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.
Manuals
Pictures
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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
