572-B,811A

[Bob Meyer]

The china brand had some problems running Horizontal.
I have 8 China 811A tubes and plates are twisted from tube to tube,as much as 90 deg.
The grid could sag from heating and short to the fil.
like in collins 30L1 amp.

If you need Horizontal mount tubes make shure to ask.

This was not a problem with Svetlana brand.
I have run Cetron JAN 811A tubes Horizontal with out a problem.

AS far as I know just China brand tubes..

73's
Robert Meyer

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