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Hi everyone,
Thought I'd share this, might be helpful to someone at some point.
Have a client who's not happy with the tone of their Invective 120 (basically a 5150/6505 with built in tube screamer, gate, a proper clean channel, and fancier switching options), is interested in my modding it. I did of course suggest that it just might not be the amp for them, but they wanted me to investigate anyway.
As schematics aren't available (to my knowledge), first step was to trace it out. As it was the Crunch/Lead channel they aren't happy with, that's where I focussed. Somewhat suprisingly to me, it's pretty much identical to an original Peavey 5150/6505 Lead channel, I was expecting it to have been re-voiced somewhat as this amp does sound more fizzy IMO, I assume there's some differences in the FX loop driver/makeup/phase inverter/poweramp to account for some of this difference, but don't feel like tracing out the entire amp.
Pretty sure all the component designators are correct as per their labelling on the PCB's, as should be values (including the oddball E96 values they've used for some reason?). There's some odd choices made in the design/construction that I can't figure any rhyme or reason for (eg, all the resistors on the main PCB are 1watts, except for R11, which is a 1/4W carbon film type?) Mildly annoyingly (from a potential modding perspective), they decided to ground the unused relay poles rather than leaving them floating. The part designations seem to be mostly the same as the OG 5150/6505. I've arbitrarily labelled some of the interboard connections just so it's easier to follow, they aren't labelled as such on the boards.
Client is now um-ing and ah-ing about mods, seems they've taken my advice more to heart now. Was still a good opportunity to familiarise myself with this relatively recent amp.
Anyway, can't guarantee it's a perfectly accurate trace, but might save someone else some work if they want to tackle more of the job.
Thought I'd share this, might be helpful to someone at some point.
Have a client who's not happy with the tone of their Invective 120 (basically a 5150/6505 with built in tube screamer, gate, a proper clean channel, and fancier switching options), is interested in my modding it. I did of course suggest that it just might not be the amp for them, but they wanted me to investigate anyway.
As schematics aren't available (to my knowledge), first step was to trace it out. As it was the Crunch/Lead channel they aren't happy with, that's where I focussed. Somewhat suprisingly to me, it's pretty much identical to an original Peavey 5150/6505 Lead channel, I was expecting it to have been re-voiced somewhat as this amp does sound more fizzy IMO, I assume there's some differences in the FX loop driver/makeup/phase inverter/poweramp to account for some of this difference, but don't feel like tracing out the entire amp.
Pretty sure all the component designators are correct as per their labelling on the PCB's, as should be values (including the oddball E96 values they've used for some reason?). There's some odd choices made in the design/construction that I can't figure any rhyme or reason for (eg, all the resistors on the main PCB are 1watts, except for R11, which is a 1/4W carbon film type?) Mildly annoyingly (from a potential modding perspective), they decided to ground the unused relay poles rather than leaving them floating. The part designations seem to be mostly the same as the OG 5150/6505. I've arbitrarily labelled some of the interboard connections just so it's easier to follow, they aren't labelled as such on the boards.
Client is now um-ing and ah-ing about mods, seems they've taken my advice more to heart now. Was still a good opportunity to familiarise myself with this relatively recent amp.
Anyway, can't guarantee it's a perfectly accurate trace, but might save someone else some work if they want to tackle more of the job.
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