superbass spec ( ****** )

rockstah · Post by **rockstah** » Tue Sep 25, 2007 6:56 pm

using ****** trannys - its a stock bass circuit. same as my 78.
just goofin off over here!

these trannys are real squishy.
i maybe the first to say but im not sure i liek them. not sure if its the OT or PT. something...

http://www.soundclick.com/bands/songInf ... ID=5810047

Mark

Eargasm · Post by **Eargasm** » Tue Sep 25, 2007 7:34 pm

Playing great as usual Mark, but I am noting a 'looser' feeling to your playing, that I think is inspired by the trannys? Whatever, your playing sounds unforced and natural, very cool.
But this is a tough one...
The trannys sound too mushy to my ear...too much sag. You would think that with that much sag, there would be more time for tone, which is normally what happens, but the tone is just not there...it sags with nothing to back it up. It's reminiscent of the effect you get from an added gain stage...more sustain, compression - and mush, but at the cost of tone.

You did this because you are trying to get away from the "tight, having to force it" feel of the plexi circuit didn't you?

rockstah · Post by **rockstah** » Tue Sep 25, 2007 7:40 pm

Eargasm wrote:Playing great as usual Mark, but I am noting a 'looser' feeling to your playing, that I think is inspired by the trannys? Whatever, your playing sounds unforced and natural, very cool.
But this is a tough one...
The trannys sound too mushy to my ear...too much sag. You would think that with that much sag, there would be more time for tone, which is normally what happens, but the tone is just not there...it sags with nothing to back it up. It's reminiscent of the effect you get from an added gain stage...more sustain, compression - and mush, but at the cost of tone.

You did this because you are trying to get away from the "tight, having to force it" feel of the plexi circuit didn't you?

thanks man. the playing wasn't anything really. just goofing off. but yeah these trannys are looser, mushier. I'm comparing it to my 78 with the same spec.
the amp always lends itself to my playing regardless.

this amp is another build to primarily to hear the trannys. since i liked the spec in my 78 i thought i would try it here. it doesn't sound as good for sure.

i may swap in a merc OT to hear the difference in this amp. but how much does the PT effect things I'm wondering as well.

this amp has very sweet highs. not aggreesive like i like in my metro and 78.

Eargasm · Post by **Eargasm** » Tue Sep 25, 2007 8:43 pm

rockstah wrote: but how much does the PT effect things I'm wondering as well.

Yeah there's not alot of research/opinion on the role of PT's on tone from what I have read, so I'm really glad you are thinking about this. So do you suspect that because this is a bass circuit, that the sag/mush is shifted to a lower freq. and that it might be better to use these trannys in a "tighter/brighter" circuit?

45auto · Post by **45auto** » Tue Sep 25, 2007 9:45 pm

it is kind of soft sounding, kind of has a looseness & rasp? my ****** opt is in the closet. using VG's daggy. i just kind of wonder if it's not just more of a vintage vibe part? i'm not 100% sure of the exact reasons, but i implicated it in my discontent with my 12 series. i mean, if i was doing something more bluesy, or classic rock-ish it might be just the ticket to a real signature sound.

rockstah · Post by **rockstah** » Tue Sep 25, 2007 10:45 pm

Eargasm wrote:
rockstah wrote: but how much does the PT effect things I'm wondering as well.
Yeah there's not alot of research/opinion on the role of PT's on tone from what I have read, so I'm really glad you are thinking about this. So do you suspect that because this is a bass circuit, that the sag/mush is shifted to a lower freq. and that it might be better to use these trannys in a "tighter/brighter" circuit?

i see what you are saying and it does make sense although i believe the thing I'm hearing is the OT. so do i switch up the spec or swap out the OT/... I'm going to swap out the OT!

Eargasm · Post by **Eargasm** » Tue Sep 25, 2007 10:57 pm

rockstah wrote:
Eargasm wrote:
rockstah wrote: but how much does the PT effect things I'm wondering as well.
Yeah there's not alot of research/opinion on the role of PT's on tone from what I have read, so I'm really glad you are thinking about this. So do you suspect that because this is a bass circuit, that the sag/mush is shifted to a lower freq. and that it might be better to use these trannys in a "tighter/brighter" circuit?
i see what you are saying and it does make sense although i believe the thing I'm hearing is the OT. so do i switch up the spec or swap out the OT/... I'm going to swap out the OT!

LOL! I instantly get a visual of you loggin out and running to your bench!
Hilarious!

rockstah · Post by **rockstah** » Tue Sep 25, 2007 10:58 pm

im always right here at the bench.

Eargasm · Post by **Eargasm** » Wed Sep 26, 2007 10:47 am

rockstah wrote:im always right here at the bench.

You're a dedicated man, gotta admire that!

rgalpin · Post by **rgalpin** » Wed Sep 26, 2007 11:16 am

sounds like you switch to the neck pu and the whole sound suddenly comes together and makes sense - up until that point it sounds like it's trying to be something that it's not great at - after the switch i think it's right in the pocket - nasty and sweaty.

is it just a straight up bass circuit or does it have an MV?

what does it mean when you say ( cerrum )? that's a transformer thing?

and did you put a cap on the volume pot?

thanks - sounds cool thanks for posting.

rockstah · Post by **rockstah** » Wed Sep 26, 2007 11:22 am

rgalpin wrote:sounds like you switch to the neck pu and the whole sound suddenly comes together and makes sense - up until that point it sounds like it's trying to be something that it's not great at - after the switch i think it's right in the pocket - nasty and sweaty.

is it just a straight up bass circuit or does it have an MV?

what does it mean when you say ( cerrum )? that's a transformer thing?

and did you put a cap on the volume pot?

thanks - sounds cool thanks for posting.

yeah im thinking the ****** trannys are good for that sound. but then again it could be the spec:

shared cathode 820/250u
bright channel .0022u
4700pf on the bright volume
560p on the bright channel mixer.
250p/56k tone stack
.022u output caps.
NFB on the 4 ohm tap
dual 32u preamp
16u screens
50u mains
32u PI

actually going to go to super lead today and then swap out the tranny!

no master - used a powerbrake. volumeon 8 bass on 4 everything else dimed.

rgalpin · Post by **rgalpin** » Wed Sep 26, 2007 11:36 am

kind of a hybrid then - i think the bass circuit would have .022 on bright ch. and .1 couplers. 4 ohm for NFB - that's contributing to the hair and looseness i think - that's like putting 100K NFB resistor in. interesting example - bye bye bass circuit!! bye bye tranny.

rockstah · Post by **rockstah** » Wed Sep 26, 2007 11:52 am

rgalpin wrote:kind of a hybrid then - i think the bass circuit would have .022 on bright ch. and .1 couplers. 4 ohm for NFB - that's contributing to the hair and looseness i think - that's like putting 100K NFB resistor in. interesting example - bye bye bass circuit!! bye bye tranny.

seems i have seen bassamps with .022u in output but yer right its note quite a bass circuit. 4ohm is hairier but as well i think its tighter too.
sounds good for that greasy blues thing. superlead spec coming up. then i get rid of the tranny.

rockstah · Post by **rockstah** » Wed Sep 26, 2007 1:01 pm

ok i changed some stuff.

everything is the same except:

shared cathode 820/250u mod: split cathode 2.7k/.68u - 820/250u
bright channel .0022u
4700pf on the bright volume
560p on the bright channel mixer.
250p/56k tone stack
nothing bypassing v2a mod: 330u on v2a
.022u output caps. mod: .1u output caps
NFB on the 4 ohm tap
dual 32u preamp
16u screens
50u mains
32u PI
http://www.soundclick.com/bands/songInf ... ID=5812306

seems better.

rgalpin · Post by **rgalpin** » Wed Sep 26, 2007 1:16 pm

not really better or worse to me - they both sound killer!!

my first reaction is that it was more "generic" in comparison to the previous.

i think i can hear your playing and technique more in the bass circuit - just seemed more unique and engaging.