If I'm not mistaking, the 6p14p-EV is a Russian equivelent on the 7189A, which is a higher spec version of the 7189 with a slightly different pin connections. The 7189 (non A) is in turn a higher spec 6bq5.
7189a = 6p14p-EV . Has some internal connections the 7189 6p14p don't. Watch this when selecting tubes.
V
7189 (no a) = 6914p (no EV) Same pin base as 6BQ5. Can sub for 6bq5, but not the other way around)
V
6bQ5 = EL84 = ?[/QUO
Thank you for the info. I checked and made sure no wires were connected to NC pin-out tabs. I ordered them, I'll report how it sounds later on.