I have a Bravo Audio V2 amp that I performed most of the available mods on; however, I have noticed that one of my LM317A voltage regulators gets much hotter than the other. Both of my IRL510 MOSFETS are about the same temperature. There is no noticeable difference between the L & R channels and everything seems to be happy…can someone tell me what the voltage regulators are actually doing and where they actually are in the circuit (i.e., what feeds in to them and where they feed too)?
I checked the voltage on the regulators and one is 1.24V between adjust and output but the cold one is 0.9V…as well, at the tube I see that Anode for triode 2 is 13V but anode for Triode 1 is 10.5V…can somebody please steer me in the right direction or do I not even need to worry about this? (But something tells me that I do need to worry about this). I have already replaced both the MOSFET and the voltage regulator on the affected side to no avail.
TBH, I don't care too much for any of that series as many members have had heaps of trouble with them, and they rarely last much more than 12 months, due mainly to poor layout design causing overheating of the large value electrolytic capacitors .Even our previous Admin (Ian) had problems with a couple of his dying too.
The series of Hybrid Amplifiers designed by E.E Frans de Gruitjer and sold by Jeremy are higher performers and will be far more reliable.