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Knight 40 W Amp. tubes correct? Location?

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Mibearcub

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Joined 2013
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Hello,
I'm new to this group and am asking a bit of advice about the tube types and their locations in a Knight 40 Watt Stereo Amp. (KA-55?).
This was purchased at a garage sale recently. No schematic.
Looking in the back, there is one F3/B9J tube (G.B.) and 4 RCA 6973 tubes.
Underneath, there are:
two RCA 6EU7 tubes at V-1 and V-2,
two Sylvania 6CM8 tubes at V-3 and V-4
two T.A.D. 12AX7A-C tubes at V-5 and V-6.
Are these tubes correct?? Is a schematic available?
Can I use this Amp between my turntable and my solid state receiver with out getting a hum?
Thanks in advance for your help.
 
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