High volume combo weirdness

[CaptainCrunch]

Amp Details: Reverend Hellhound 1x12 combo w/ a MojoTone Black Beauty speaker.

Issue: at high volume (which I don't get to play at often), and the more gain the more pronounced the problem - I'm essentially getting the effect of an octave doubler pedal - I'm hearing the fretted note plus the lower octave. What is going on here?? Recently had a motor boating thing going on with certain notes but switched out the power tubes and that problem was solved. Anybody heard of this before?? Preamp tube maybe?? I honestly have no idea...

 

[jerryjg]

Re: High volume combo weirdness

From personal experience, always make certain the fuse cap is snug into the fuse holder. beyond that all i can say is sounds like it may be a tube, but Im not a tech. good luck

 

[CaptainCrunch]

Re: High volume combo weirdness

Swapped preamp tubes, still have the same problem. should add it is on notes from B flat, whether played on the b string or high E string and above.

 

[FAC]

Re: High volume combo weirdness

Swapped preamp tubes, still have the same problem. should add it is on notes from B flat, whether played on the b string or high E string and above.

Just curious...is it coincidence that (one version of) B flat is almost equal to 60 cycles (58.3 Hz, actually)? Don't ask me what led to this conclusion...totally serendipitous that I happened to be looking at a frequency chart at the time. Not sure if it is significant at all, I just though it was curious... (the next whole note is B at 61.3 Hz).

 

[StrangeSound]

Re: High volume combo weirdness

Perhaps it's a speaker problem.

Also, there are moments when I had the amp up too loud and those stupid Vintage 30's made their famous double-note sound.

http://www.scotthenderson.net/gear.htm

Perhaps your speaker reacts the same way?

 

[darnright]

Re: High volume combo weirdness

Does it happen with more than one guitar? Could be a guitar concern...

-dave

 

[CaptainCrunch]

Re: High volume combo weirdness

It does happen with either of my guitars. Though I had wondered about the speaker, I had asked a couple of local players who said naw, it wouldn't be the speaker so I kind of dismissed that possibility.

I did unplug from the internal speaker and into a 1x12 cab with a Texas Heat and it still did the same thing, but I had never heard anyone ever mention having this happen like in the Scott Henderson quote, so I'm going to explore this one a bit further. I'm as cheap as the next guy and hate to take it in to a tech if I don't really need to, especially if it's going to be time consuming to track down the problem. Thanks for sharing thoughts and if anybody has had a similar experience or has any other ideas as to what is causing this I'd love to hear. Scott

 

[YJM_Rocks]

Re: High volume combo weirdness

Filter capacitors. How old is the amp?

 

[CaptainCrunch]

Re: High volume combo weirdness

Not sure, these haven't been made for awhile now. Couldn't find any info on production dates at a quick search. Is what I'm describing symtomatic of filter caps needing replacement?

 

[YJM_Rocks]

Re: High volume combo weirdness

Yes, there will be ghost notes, like another guitarist playing along in another octave or different tuning. It is usually kinda faint, but definitely noticeable. Filter caps need replacement ever 10 years or so.

 

[CaptainCrunch]

Re: High volume combo weirdness

Wouldn't surprise me if it's at least that old. Thanks. Scott