Lavoie LA-265A: Difference between revisions

From TekWiki
Jump to navigation Jump to search
No edit summary
No edit summary
 
(3 intermediate revisions by one other user not shown)
Line 8: Line 8:
|summary=33 MHz oscilloscope  
|summary=33 MHz oscilloscope  
|designers=
|designers=
|series=500-series scopes
|manuals=
|manuals=
* [http://w140.com/LA265A.pdf Lavoie LA-265-A Manual (PDF)]
* [[Media:Lavoie LA265A Manual.pdf|Lavoie LA-265-A Manual]]
}}
}}
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.   
{{MissingSpecs}}


==Internals==
==Internals==
Line 21: Line 23:
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.
This is because the terminal strips in the Lavoie have tin-plated steel inserts.


==Links==
==Links==
* [http://www.radiomuseum.org/forum/lavoie_la_265a_a_superb_tek_clone.html LA-265A, a superb Tek clone] (radiomuseum.org forum)
* [https://www.radiomuseum.org/forum/lavoie_la_265a_a_superb_tek_clone.html LA-265A, a superb Tek clone] (radiomuseum.org forum)
* [http://www.radiomuseum.org/r/lavoie_oscilloscope_la_265_ala26.html radiomuseum.org page for LA-265A]
* [https://www.radiomuseum.org/r/lavoie_oscilloscope_la_265_ala26.html radiomuseum.org page for LA-265A]


==Pictures==
==Pictures==

Latest revision as of 06:26, 2 February 2024

Lavoie LA-265A
33 MHz oscilloscope
Lavoie LA265A with Lavoie LA-265-CA Plug-in

Produced from (?) to (?)

Manuals
(All manuals in PDF format unless noted otherwise)
Manuals – Specifications – Links – Pictures

The Lavoie LA-265A is a 33 MHz scope that takes letter-series and 1-series plug-ins. It is an unauthorized clone of a Tektronix 545A made for a defense contract by Lavoie Laboratories.

It has two timebases, which allows delayed triggering.

Key Specifications

  • please add

Internals

Electrical difference to 545

The high-voltage circuit is not identical to that of the Tektronix 545A. Neon lamps are used to stabilize the high voltage in brightness circuit. However, the neon 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, because its terminal strips have tin-plated steel inserts.

Links

Pictures