[R-390] 12AX7's and Subs

[Tim Shoppa]

Perry Sandeen <sandeenpa at yahoo.com> wrote:
> First of all if this subject winds up your pacemaker too much, remember this is a technical
> question for our hobby, not a political statement.
>
> I need about 20 12AX7's for my R-388's and other equipment.  Epay is crazy.  Is the Russian Double
> Triode Tube 6N2P-EV a legitimate viable substitute?  What about the Svetlana 12AX7's sold by
> Triode Electronics?

The 6N2P will only work if you can rewire the filament connections in
your radio to support tubes with 6.3V heaters.

IMHO the E european 12AX7's are much more likely to suffer interelemnt
shorts than the best JAN USA tubes. But they probably aren't
any worse than what the TV repair shops sold in the 70's and 80's.

> Some NOS 6N2P tubes on epay are cheap.  I'm not looking for exotica tubes.  Just the plane jane
> tubes we used to get from Newark, Allied and others.

I believe that Allied now has 12AX7's in their latest catalog (2007) again,
for $12.75 each.

Probably branded National, probably Russian.

Tim.