Chimike

Just diggin' round !

I sense the need for a B15 shootout at the next basschat bash ! Paging Mr Beedster, I'm sure he could advise on sound, having owned one of the new reissues with the 64/66 options.

re the SB12 circuit. Ah, but there was a later version , using 6l6gc's, however, it doesn't use octal preamp tubes, either. Neither does the B15S in that comparison

Anyway, I blame my spell-checker !😀

Ha, Well , it might be worth looking at the later SB12 circuit, using 6L6's, as that appears to be what you are describing . I often use an SB 12, and they are fabulous sounding, and lighter than my old B15 !

Gotta subscribe to this ! I also caught the bug during lockdown, and my B15 build is coming along nicely. I went for the 64/66 option, and found a build manual on the Trinity amps website that was very helpful. Another source of info was CtG B15. Great project, go for it !

Great it got sorted, enjoy .

Collection only, or it would be mine !

Might be a good idea to just take it in stages. 1 ,That VR400 amp is unusual, only has line in, and line out, plus speaker connections. Check that it works by plugging in speaker, and use a pedal ( something like a Sansamp ) to get enough signal from your bass to make sure it works. Never run this amp without speaker connected. 2, The ah600 is a dual channel amp, needs speakers connected to both channels. try it with your bass , as normal. Personally, I would not run that amp without speakers , JIC. 3, Then , when both are working, I would try to link them. My memory of the AH600 is vague ( although I could look at mine tomoz ), but I seem to remember there were various options to get a signal out, DI out, line out and effects loop. take a pic of the back of your amp, let's see what the possibilities are for you. Mind you, if you get all that working, you could play the 02 arena,

In the right circumstances, a well maintained 60's B15 is just such a joy to play. Was never designed to go up against Marshal stacks ! Mine hums a bit , at the 'mo, so I need to check it out, but I use it's little brother, the SB12 at open mikes with acoustic guitars. I have put a deltalite in the cab, so the efficiency helps. Just Magic ! I do have other amps, if I need more volume ! Horses for Courses. And there are modern clones available, if reliability is paramount.

Ok, When you so "on ", do you mean it still made music, (plus the growl ), or just growled ? So there maybe two versions of the B15n, one had a single fuse on the back, apart from the mains fuse, and the other version had 4 fuses ( plus the mains ) . First thing ,when the amp is unplugged , is to check the fuses, if it has the four.

Hi Old Man Riva firstly, congratulations on your choice of amp ! First place to start, there were two versions of the B15 Heritage, the first was point to point wired, then Ampeg made the Heritage B15n, which was pcb based. Any idea which one you have ? Next question, did any fuses blow ? Mike.

might be worth checking out Trinity Amps " Trip Top ", Similar to Heritage B15 circuit, and looks the part !

Hmmm, that circuit diag looks like the power amp only, should find another 12ax7 in the preamp. apologies, I'VE BOOKED MYSELF IN TO SPECSAVERS !