| Author |
Topic: chip |
Rene Brosseau
From:
Chatham,Ontario, Canada
|
Posted 2 Sep 2012 11:39 am |
|
Just purchased a Nashville 1000 with new chips in them. What do they do compared to the original?
_________________
Franklin #130, Melobar Skreemer, Wechter Scheerhorn Resonator, Nashville 112, Boss DD 3 |
|
|
|
Rene Brosseau
From:
Chatham,Ontario, Canada
|
Posted 2 Sep 2012 11:40 am chips
|
|
do they usually come from Mike Brown or Ken Fox?
_________________
Franklin #130, Melobar Skreemer, Wechter Scheerhorn Resonator, Nashville 112, Boss DD 3 |
|
|
|
Tim Marcus
From:
San Francisco, CA
|
Posted 2 Sep 2012 12:28 pm
|
|
they probably come from Texas Instruments
Modern operational amplifiers (opamps for short) have much wider frequency response because they are much "faster" than their vintage counterparts. This gives a bit more of an open sound.
That said, there is no guarantee that the chip will sound "better" to your ear. Some folks, for example, seek out vintage opamp chips for their tubescreamer pedals because they think the vintage ones sound better than the new ones.
The best thing to do would be to have both, and substitute them one at a time and see if you notice a difference.
chips are good with dip, or as we like to do here in northern California - salsa 
_________________
Milkmansound.com |
|
|
|
Jack Stoner
From:
Kansas City, MO
|
Posted 2 Sep 2012 1:45 pm
|
|
Depends in which chips it has it it. OPA2604's were originally used to modify the Nashville 1000 and 112 but later it was changed to OPA2134's.
I used to have a Nashville 1000 and tried the 2604's but didn't really like it. However, I installed the 2134's and it took away the "honk" in the amp and smoothed it out and made it sound like a Nashville 112.
The Nashville 1000 has a "Digital" power amplifier section where the Nashville 112 has a conventional "analog" power amplifier section. The preamp is identical in both amps.
I sold the Nashville 1000 to a person in New Jersey. |
|
|
|
Ken Fox
From:
Nashville GA USA
|
Posted 2 Sep 2012 3:02 pm
|
|
Burr Brown chips use FET transistors, Unlike the 4560 orignal chip which are regular bipolar transistor type devices. I agree that the OPA2134 is a better sounding chip than the OPA2604.
From the internet:
FET's have their own transfer function and harmonic distortion which alters the harmonic signal content slightly and gives the tube like tone and guess what, all FET's do it.
Tubes do a similar thing and have their own harmonic distortion.
A FET's harmonic distortion has some features in common with a Tubes and a transistor doesn't.
Hence the sucess of the Evans FET500, Mosvalve amps and others that have used FET devices. There are even several FET transistors in the Webb preamp stages as well. |
|
|
|
Tim Marcus
From:
San Francisco, CA
|
Posted 2 Sep 2012 3:37 pm
|
|
For what it's worth, FETs behave similar to tubes. Maybe that's why people dig the sound of them!
_________________
Milkmansound.com |
|
|
|
Ken Fox
From:
Nashville GA USA
|
Posted 2 Sep 2012 5:42 pm
|
|
| That was my point exactly. In the Nashville 400 mod we do I use tantalum caps to couple the audio from stage to stage as well as the Burr Brown chips. The caps also behave in a fashion similar to a tube sound. They were the effect of the "tube" sound in the famous Neve preamps used in studios for many years. |
|
|
|
Rene Brosseau
From:
Chatham,Ontario, Canada
|
Posted 3 Sep 2012 9:46 am chip
|
|
how can I tell which chips I have? is there a number on them & where are they located? is it a circuit board?
_________________
Franklin #130, Melobar Skreemer, Wechter Scheerhorn Resonator, Nashville 112, Boss DD 3 |
|
|
|
Ken Fox
From:
Nashville GA USA
|
Posted 3 Sep 2012 9:55 am
|
|
| The circuit baord owth the control knobs is where the chips are located. There are 5 of teh 8 pin chips. If the they are Burr Brown they will have "BB" on them. If they are 4560 types then they are the originals |
|
|
|
Mark Draycott R.I.P.
From:
Portland, OR
|
Posted 4 Sep 2012 12:18 pm
|
|
I just swapped-out the 4558's in my Stereo Chorus 400 for the BB OPA2604. It was a cheap mod and the amp sounds substantially better. I am curious about the OPA2134 now.
_________________
1976 Sho-Bud Pro II, 1976 Sho-Bud LDG, BF Fender Deluxe, Evans FET 500 LV, BF Princeton Reverb, '68 Vibrolux Reverb |
|
|
|
Ken Fox
From:
Nashville GA USA
|
Posted 4 Sep 2012 1:04 pm
|
|
| 2134 is far superior in audio quality |
|
|
|
