2 amps is a nice charge rate for this size battery, however, voltage on charger must not exceed about 14.5volts max. At this point it must be disconnected from the trickle charger. Dont be fooled, Any amps at over this voltage (over fully charged) will eat the spider web lead wire that they use for the intercell connections.
When this happens you end up with a battery, fully charged that you cant get the power out of because of course, the interconnecting lead has dissolved or has become so perilously thin that when you put a load on it, it fuses out. So if you plan to leave it unattended then it must be regulated not to exceed float voltage (13.7v is fine).
If you leave it on charge for longer than that which fully charges it, without a float regulator, it will start eating the cell interconnects.
(we had a problem with .5amp charging circuits on tiny 5hp hondas..unregulated. Many 17ah 12v batteries were killed off and dismanteled only to find electrolysis had eaten the internal wiring...on a lousy half an amp, before we finally ignored honda's factory settings and built voltage regulators on them (all 170 of them).
So heed nando's advice
12ax7.....ecc83....have'nt heard that in twenty five years. Are you still high mu or now wearing out to medium. For reasons I can't begin to guess, I can still remember the pin-outs for that tube.. nice to hear it again, takes me back to a simpler time.
.......oztules