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Topic: Fox Mod Kit Nashville 112 |
Paul King
From:
Gainesville, Texas, USA
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Posted 9 Jul 2024 3:36 pm |
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| I have a friend wanting a Fox Mod Kit for a Nashville 112 amp. Tried to search but could not find what I am looking for. Any help locating one would be greatly appreciated. |
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Dave Hopping
From:
Aurora, Colorado
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Posted 9 Jul 2024 6:49 pm
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IIRC Ken still has them. It's an easy swap with an older 112 that has the non-soldered factory chips. Later ones with the soldered chips need either a tech or some experience with a soldering iron. My 112 has the Fox chips and sounds much better. 
Last edited by Dave Hopping on 11 Jul 2024 8:39 am; edited 1 time in total |
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Ken Fox
From:
Nashville GA USA
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Posted 10 Jul 2024 4:17 am Chips
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The kits are no longer available. Texas Instruments no longer produces the chips.
All that I sold were bought direct for on the manufacturer, TI
All other reliable sources are out of stock
Lots of counterfeit chips from China on eBay
Also a few at outrageous prices on the internet
I have not found a chip yet to replace the OPA2134PA. |
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Bill A. Moore
From:
Silver City, New Mexico, USA
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Paul King
From:
Gainesville, Texas, USA
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Posted 10 Jul 2024 9:29 am
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| Thanks for the info. I will pass the word to him. |
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Pat Chong
From:
New Mexico, USA
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Posted 12 Jul 2024 5:58 pm
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Those chips are also available at Mouser electronics:
OPA2134PA, from Tx Instruments, or the OPA2134PAG2, also from T.I., if the "G2" makes any difference.
Price is a little over 6 bucks each and they have plenty of each in stock.
Pat. |
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Ken Fox
From:
Nashville GA USA
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Posted 13 Jul 2024 8:48 am
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| Great news there. They have been out for months. |
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Paul King
From:
Gainesville, Texas, USA
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Posted 13 Jul 2024 10:35 am
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| How many chips are in the kit? I just do not remember how many I changed out. Is there a part number for the kit from Mouser? |
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Ken Fox
From:
Nashville GA USA
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Posted 13 Jul 2024 12:02 pm Kit
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There is no kit per say from Mouser. I’m glad to see they do have the chips.
I bought wholesale directly from TI. They are still no
Longer available from TI
My kit had 5 chips and instructions
Remember, if you get one or more chips installed backwards it will take out four
22 ohm resistors in the power supply
Newer amps do not have sockets. As said above would require a tech to install the newer chips. If that is the case I have always put chip sockets in after removing the older 4558 op amp chips |
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Paul King
From:
Gainesville, Texas, USA
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Posted 13 Jul 2024 1:25 pm
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| Thanks Ken |
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Ken Fox
From:
Nashville GA USA
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Posted 14 Jul 2024 2:05 pm N112 mod
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Paul King
From:
Gainesville, Texas, USA
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Posted 14 Jul 2024 2:31 pm
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| Thank you Ken. |
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Norm Fletcher
From:
Ashland, OR
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Posted 18 Jul 2024 12:19 am Op Amp Replacements
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These Burr-Brown op amps are a definite step up in sound quality. The slew rate is 20 volts per microsecond. There is about .001% harmonic distortion at 20kHz and far less below 10kHz.
I like to tell my non-geek musician friends about slew rate. I usually give the following example: the slew rate of your teenager is pretty slow. An instruction of "clean your room" to a teenager has a typical slew rate of hours to days before the task is done.
Slew rate in electronics is how fast the circuit responds to a signal. It is measured in volts per micro second---that's Millionths of a second! The stock Peavey 4560 op amp responds to a change in input voltage at 4 volts in a micro second. The Burr-Brown (TI) op amps are 5 times faster to respond. What gets plugged into the amp comes out the speaker without much coloring. That gives remarkable clarity in an instrument amplifier.
If you decide to upgrade, please adhere to Ken's advice. He's a master!
_________________
Williams 700 E9th/B6. 1978 Webb 6-14. Taylor Acoustic, 1973 Ramirez Segovia 1a, Brian Moore iGuitar with synth driver and, my standby for acoustic gigs, a little Roland Acoustic amp. |
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Bill A. Moore
From:
Silver City, New Mexico, USA
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Posted 18 Jul 2024 5:12 am
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| I'll add my 2C, I don't change the reverb chip, I feel the 4560, and 4558 sound better! |
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Joe Shelby
From:
Walnut Creek, California, USA
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Posted 11 Sep 2024 10:35 am having difficulty installing chips
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I know this shouldn't be difficult to do.
Across the width of the chip, the contacts seem too wide to properly seat in the sockets.
Am I just being stupid about this or is there something more to know?
Thanks in advance for any help!
Joe
PS- I got the chips from Mouser. |
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Stephen Cowell
From:
Round Rock, Texas, USA
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Posted 11 Sep 2024 10:57 am Re: having difficulty installing chips
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| Joe Shelby wrote: |
I know this shouldn't be difficult to do.
Across the width of the chip, the contacts seem too wide to properly seat in the sockets.
Am I just being stupid about this or is there something more to know?
Thanks in advance for any help!
Joe
PS- I got the chips from Mouser. |
Love me some Mouser... here in Austin you can order ground and it arrives overnight from Ft. Worth whse.
You have to remove the 'spank' on the leads... I hold the chip in both hands and press hard against a hard surface... you don't want to bend the ends of the leads, you want to bend them where they leave the chip. Bend them in so they're parallel and carefully pop them in the socket. Watch for bent-under legs when inserting!
_________________
New FB Page: Lap Steel Licks And Stuff: https://www.facebook.com/groups/195394851800329 |
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Joe Shelby
From:
Walnut Creek, California, USA
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Posted 11 Sep 2024 1:48 pm
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Thanks Stephen, I think that will do the trick.
Joe |
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