Try the 4.7K resistor. It will smooth things. Less power amp gain.
Also, make sure the presence control is wired correctly. The 3rd lug of the presence pot must not go to ground. That will add to potential harshness. Only the presence cap and tail resistor get grounded.
Hey Dogears,..
I already have the presence correct,...I´ve read your posts very carefully!
How long did you use your amp? I've noticed in the past some development in tone within the first hours of an amp.
Some kind of settling or whatever...
Maybe you should just play&wait a few hours before tweaking.
Ciao
Martin
I´ve been playing the amp for about a month now...well over the 30-40 warmup hours.... however there is some supicion about the poweramp oscilating.... I´m gonna take it over to a friend of mine this weekend to put it on the scope....
Here´s a new clip. I took the liberty of using a backingtrack by Normster (thnx )
Sorry for the bad audio quality, and sometimes my timing is of due to the fact that I was playing along with the audio on the PC speakers....
I took the amp over to a friend of mine last weekend, there were some problems with the leaddres and one or two unshielded cables, the amp sounds more smooth to my ears now. Maybe I could back of the treble bleed a tad more. Cabinet is a GT 1x12 with tonespotter.
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I like the new clip very much ! It cleans very nicely when You play with softer touch. The mid honk is very nice also. I presume this was not close mic'ed ?
Very good sound + cool phrasing. (have to study those chromatic licks..)
mat wrote:I like the new clip very much ! It cleans very nicely when You play with softer touch. The mid honk is very nice also. I presume this was not close mic'ed ?
Very good sound + cool phrasing. (have to study those chromatic licks..)
Very close to close mic´ed...about 3 feet away form the speaker... I use octotonian scale a lot as well as pentatonic, mixolydian and other modes.
Bob-I wrote:I'd take the SM caps out and replace them with ceramics. There's a grainyness to the highs with ceramic that you don't get with SM.
Nice playing by the way.
I still have SMs at the treble cap and V1...I will replace the treble cap with 330pf asap
probably means octatonic, otherwise known as half/whole. Octatonic because when you alternate whole and half steps you have 8 notes instead of 7 before you hit the next octave.
You can start either with a half step or a whole step.
Ex. E F G Ab Bb C D Eb
or E F# G A Bb C Db Eb
I still don't completely get that scale. If you take that first sequence then when you get to C...you go up a whole step to D...then a half step to Eb...but then to start it over again you'd have to go up a half step to E instead of the 'scheduled' whole step. So I can see how it alternates within one octave but after that it can't maintain that same half-step/whole-step alternation and still be the same scale.
mat wrote:To me the 1265 clips sounds better and the videoclip is just great ! Great sound and playing
What is it of the sound You dont like ?
I have tbe treble bleed circuit build in, 330 pf snubbers and a 390pf treble Cap, and somehow I can still hear a sharp edge on top of the sound (0.001uF 1meg trim to ground)... its like my poweramp or PI is adding that edge... is that even possible?
What is the effect of a lower value NFB resistor? I´ve got the dlite value ( 6k8 ) and Dogears recommend 4k7... what does that do?
Maybe some other power tubes?
Or is it something else I´m hearing?
grtz Lars
clips are very good! Try dogears 4k7 on the FB. I am guessing it will smooth out upper mids a bit as it put more feedback to the PI. More FB = less volume and distortion/more even freq. response. Less feedback = louder/ more agressive sound. Good luck.
EDIT oops, I missed page 2 of the posts so looks like the feedback topic got covered already! The latest clip sounds great!
benoit wrote:
You can start either with a half step or a whole step.
Ex. E F G Ab Bb C D Eb
or E F# G A Bb C Db Eb
benoit are we talking diminished scale (which is the most common octatonic (8 note) scale), in which case there is a typo from Bb to C. It should be a 1/2 tone which is Cb(=B). So the scale would be (half step, whole step) = E F G Ab Bb Cb Db D E.
This is, as we all know, one of RF's favourite devices, particularly over dominant chords.
Barry Harris loves 8-note scales (he calls them "bebop scales") because they fit evenly into measures. He has a unique approach to harmony that you ought to check out.
There's some application of that stuff to the guitar at
Guitarman18 wrote:benoit wrote:
You can start either with a half step or a whole step.
Ex. E F G Ab Bb C D Eb
or E F# G A Bb C Db Eb
benoit are we talking diminished scale (which is the most common octatonic (8 note) scale), in which case there is a typo from Bb to C. It should be a 1/2 tone which is Cb(=B). So the scale would be (half step, whole step) = E F G Ab Bb Cb Db D E.
This is, as we all know, one of RF's favourite devices, particularly over dominant chords.
Really nice playing Lars BTW.
thnx
They are the same.... but...playing over a dim chord you should start with the whole step, in case of a altered dominant chord (for example g7 (b9/13) start with the half tone step.
)
