GGG Rodent (ProCo Rat) - Using Tantalums For Largest Caps?

[Rocket Roll]

Hello! As I'm about to build me a GGG Rodent (ProCo Rat replica, http://www.generalguitargadgets.com/index.php?option=com_content&task=view&id=92&Itemid=26 ), I was wandering what would it sound like if I used at least five tantalum capacitors?

Would it bee too much of a good thing? Would the sound be... interesting? Or plain bad?

I' going to build a version with 3PDT switching and no Millenium switching parts ( http://www.generalguitargadgets.com/pdf/ggg_rodent_lo_3pdt.pdf ). I can find tantalum caps for positions C5 and C7 (4.7uF), C12 and C14 (47uF) as well as for C11 (100uF).

As for other caps, I'll go with WIMA MKS2 and FKP2, except for C3 (100pF), C4 (30pF) and C8 (0.003uF), as I can find only ceramic capacitors for that places.

Thanks in advance for any opinion!

[Rocket Roll]

Did some search using the "Search" functions - turns out it'll be OK to use tantalums, as first Rats were built using tantalums (almost?) exclusively.

To rephrase the question, then - what would be the "critical" capacitors for sound in that GGG "Rodent" schematic? Any recommendations which ones to use in those "critical" spots?

(Gettin' lonely here talking to myself, folks...)

[petemoore]

  I repaired a Rat recently, and saw mostly [just glanced...] little brownie flats caps in it.
  Any will work, tants are polarized so you must observe and not reverse polarize [I didn't analyze the 5 positions...can't say if any should be non-polarized.
  Other than that if I had tants, I'd use them, if anything the brownie caps or tants might exhibit some 'character'.
  I built mine with greenies, but at that time I was thinking that the amp/speaker/pickups etc. make >10x the difference Vs. various capacitor materials...still do...but that's cause I'm closed minded that way, perhaps one day I'll investigate further and see if I can't find some virtue in tants which I find unique and useful enough to seek them out instead of using greenies. NASA uses tants so it'll sound NASA-tey !

[Rocket Roll]

Great!

I don't expect a significant change in tone using tantalums - as long as the tone doesn't change for the worse (when using tantalums on those positions), I'm happy. It's just that I'm trying to avoid cheap electrolytic capacitors which are almost exclusively the only kind available here. I'd go with WIMA all the way if it were possible - again, not because WIMA sounds "the best", but because WIMA capacitors are rated as "300 000 working hours" and are (as far as I know) extremely reliable.

But I can't find WIMA's 4.7uF, 47uF 100uF caps, so the only other alternative are tantalums. Philips tantalums, to be more precise.

I've used two of them in my DOD Overdrive 250 build and I've managed to orientate them properly. 

[mac]

I use tants instead of electro whenever I can, big bypass caps, filter caps, coupling caps, etc. But I put a poly cap in parallel to "aid".
Tants sound a little better than electros to me, but not as good as polys or ceramic. But I heard of many people saying that tants distort bad. Personal taste. MXR used to put tants in P90 and D+.

mac