SB-401's 6146 tube questions

[Robert Myers]

I have a few questions regarding the final amplifier of the SB-401:

 

- What are the typical symptoms of an SB-401 when it requires neutralization
of the finals?

- Is it always mandatory re-neutralize if one or both finals are changed?

- Does it make a difference weather a 6146A or B pair is used in this rig?

- Can you use one 6146A tube and one 6146B together, or does that cause
problems?

 

Thanks,

--- Rob VE3JQL

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