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Old 10th Jul 2020, 10:03 pm   #17
bikerhifinut
Octode
 
Join Date: Nov 2013
Location: Penrith, Cumbria, UK
Posts: 1,993
Default Re: Hope to start an audio amp with CV415/CV4046/TT15

Do you need some ECC83?
I can spare a couple and I wont charge a stupid amount. You are right about the silly price and if a ECC81 does the job, its a good valve (tame its HF with grid stoppers etc as its really an RF valve it didn't stop HJ leak though)

As to the bias supply, is this really necesarry? At our end we don't need to squeeze the output valves so hard and cathode bias will produce a true HighFidelity result at the cost of a few watts that you ever knew you didn't need.
And an amp that doesn't need tweaking through the valve useful life.

And
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