What is the least value for kathode / heater isolation?
On Jan 9, 3:20 am, jaap wrote:
AVO tube testers test K/H isolation in Mohms. Most new IDH tubes read
over 25 Mohms while some heavily abused tubes read 5 Mohms or even
lower. Is there need for replacing preamp or output tubes with lowish
isolation while emission is still strong? What is the effect of low
isolation on reproduction?
Depends on the circuit. Consider that directly heated filament types
have zero isolation.....
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