[Amps] 572b vs gi-7b for tube life

[Ian swain <mr_penguin@paradise.net.nz>]

Hi

I'm thinking of converting my HF 572b amp to gi-7bs but when I look
at the spec sheet for the gi-7b I see a 600 hour life span.

600 hours is not really that long I know the tubes are cheap but.........

What sort of life span's on the spec sheet for the 572b ?

Regards and 73
Ian
ZL2IAS


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