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Early production not "some production"
Vintage dave (talk | contribs) (Remove picture of Type CA plugin misnamed as Type D.) |
Vintage dave (talk | contribs) m (Early production not "some production") |
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==Internals== | ==Internals== | ||
Early production used a pair of [[5814]] tubes at the input while late used [[12AU7]]'s. | |||
These two tube types have different heater currents, and because the heaters are | 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. | series-wired, you cannot switch from one type to the other without circuit modification. | ||