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Old 8th Jul 2020, 10:11 pm   #8
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

Just a note on EF86, they are horribly expensive, even the Russian ones.
And many of the EF86 out there either "NOS" or "Used tested" aren't much cop in terms of noise either because they are already on their way out or were rejects that made their way back out...……..
I have found that its predecessor the B8A EF40 rimlock can be found for a reasonable sum if you dig around on the web or once we are allowed out, at swapmeets. It's electrically identical so a straight swap in given a different base. (that fits in a B9A hole).
You might consider something like an EF184, not identical and the heater isn't helically wound so it can be prone to hum induced from the heater, but if you use regulated DC then its an option.
Of course you may have a stock of EF86 in which case …………………….

A.
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