In article , Andrew
VK3BFA wrote:

A subject got sidetracked a while ago, with numerous people getting
nostalgic about the boxes of old 807's they had sitting around waiting
to be used - has anyone built a HF linear using these things - and not
QRP or max 100watts - found one reference to 4 of them in // giving
250 watts - getting there , but a bit more power out, perhaps? - any
pointers to info or sites - there MUST be a use for these things, I
have been hoarding them for 30 years now!
73 de VK3BFA Andrew

The thing that immediately pops to mind about an old 807-based
push-pull parallel amp (6 tubes) was that it was a #$!!*% to
neutralize!

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Namaste--