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Inspire by Dennis Had Enjoying Vacuum Tube Audio

 
 
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Old 10-23-2021, 09:12 PM
Bombadil Bombadil is offline
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Yes, some 6ez5 are a close equivalent to 6V6. I say some because the 6ez5 changed a bit over time. Early 6ez5 are a bit different, close, but different in some ways. They drew a higher heater current and had lower plate resistance.

However later production not only were close to 6V6, they *were* 6V6GA/GTA tubes. I've heard this changeover took place in the late 1960s into the 1970s. Tube manufacturers were cutting production and they decided to completely stop making 6ez5 and decided to substitute 6V6GTA, by labeling them as 6ez5.

You can tell them apart by measuring how much current they draw. If it is up around 0.8A to 0.9A, then they are authentic 6ez5. If they measure around 0.4A to 0.5A then they are 6V6GT/GTA.

If one is using an amp without much extra current capacity from its power transformer, say a PP 6V6 amp with 4 6V6 tubes. Then substituting 4 6ez5 can overload and fry your power transformer. So they are not safe substitutes for all amps. Shouldn't be any problem in an Inspire amp which can handle much larger tubes, such as KT150.
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