Nos amperex/Philips tube lights up
I did find 4 matched Nos philips/amperex holland made fom 1963 - 1969 here in sweden to a really good price so i brought them and just put them in.
But when i start the pre amp (C500T) the tubes flashes like a normal light bulb for 1 sec and then turn green. is this normal? It did not do this with the gold lions.
Everyting else is normal
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