I need to replace three 3-500Z (or 3-500ZG) tubes. I have been surfing the web
an I have find 2 nice alternatives:
1.- Buy to RF parts their chinese tubes
2.- Buy to dandcelectronics the 3-500Z the resell. They offer a nice price for
these Pro-Tek tubes but I don't have any idea about these tubes. Anyone has any
Any other suggestion? Might be in Europe?
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