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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]]. | ||
{{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== | ||