Very basic: 22V to 12V AC

[moamps]

Do I need to check anything else ?

Make sure you also check the temperature of the regulator. Keep us posted.

Regards,
Milan

 

[gmphadte]

Can't u use half wave rectified 22V. U will keep the heat low this way.

Gajanan Phadte

 

[DJ Exprice]

Make sure you also check the temperature of the regulator. Keep us posted.

Regards,
Milan

Exactly. The LM7812 gets very, VERY hot if enough current is being drawn and/or if the input voltage is anything above 18v! Put a heatsink on that hummer and it'll SHINE! 😀
It'll run very well with even a tiny heatsink. The variable regulators can get hot, but not as hot as the standard ones. The variable regulators have a 5A output and the LM78/s/xx/LM9/s/sxx (the standard ones) only have about 1-1.5A output! How do you figure that? 😀

I would still go with either no regulator and just do what the kit says, or run it through a POSITIVE variable regulator (and a NEGATIVE variable regulator if you need to have the +/- balance perfected 😉 )