Diezel tube matching

G

guggles

New member
Since tubes are harder to find, and quartets are even harder, is there any issue with using two pair of KT77's? For the preamp is there any issue of using a regular 12ax7 instead of a 7025 in the VH-2?
 
guggles said:
Since tubes are harder to find, and quartets are even harder, is there any issue with using two pair of KT77's? For the preamp is there any issue of using a regular 12ax7 instead of a 7025 in the VH-2?
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From what I know ya two separate pair of are matched at within 5 to 7mA apart they are still able to operate... I would put a lower matched two at outer and hotter matched inner ?
 
Try Tubedepot.com
They have a lot in stock.
You won't notice a big difference in running 12AX7's

I have swapped all kinds of different preamp tubes in Herberts. Hagen and VH4.
The amps have plenty of gain so look for something very noise free especially in the V1 position.

T.A.D. pre's seem to be the quietest and way less microphonic that a Chinese 9th
 
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