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RE: NYAL OTL 3

Hi,
Need to revive this thread as I still have not resolved the issue. To recap:

VI developes an orange glow upon switch on. It is similar when moved to V2 and V3 position. V1 is OK in V6-V8 position. V2 and V3 are OK in V1 position. V6-V8 also glow in V1-V3 position but are OK in their original postion. In addition to the glow the affected tubes get extremely hot.

I have since purchased 10 6LF6 tubes but each has a similar problem in V1-V3 position.

Have not attempted biasing in view of the overheating.

Inputs on what could be wrong would be appreciated.

As a last ditch measure, am considering converting the amps to OTL 3Q as I would then need only 4 6LF6 tubes. The lower power output is OK as dont need much power to drive the Tannoy HPD385(8 Ohms, 91db), previously driven by late Geroge Wright's 2A3 monos (3.5 Watts).

Assistance from members would be appreciated.

Thanks and Regards,
Nara

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