D: Difference between revisions

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[[Lavoie Laboratories]] produced an unauthorized clone, the [[Lavoie LA-265-D]].
[[Lavoie Laboratories]] produced an unauthorized clone, the [[Lavoie LA-265-D]].
==Internals==
Instruments below serial number 3462 used a pair of [[5814]] tubes at the input; later production used [[12AU7]]'s.
These two tube types have different heater currents, and because the heaters are series-wired, you cannot switch from one type to the other without circuit modification.


{{BeginSpecs}}
{{BeginSpecs}}
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* In practice, Type D behaves well up to about +/–15V if the CM signal is either a brief excursion or a constant.  If the CM varies slowly, DC shift in the input tubes will degrade CMRR.
* In practice, Type D behaves well up to about +/–15V if the CM signal is either a brief excursion or a constant.  If the CM varies slowly, DC shift in the input tubes will degrade CMRR.
{{EndSpecs}}
{{EndSpecs}}
==Links==
{{Documents|Link=D}}
==Internals==
Instruments below serial number 3462 used a pair of [[5814]] tubes at the input; later production used [[12AU7]]'s.
These two tube types have different heater currents, and because the heaters are series-wired, you cannot switch from one type to the other without circuit modification.


==Pictures==
==Pictures==

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