Last evening, as we were parting from the relatives after Thanksgiving dinner, my nephew asked if I could repair his son's guitar amplifier -- the youngster has a Gibson which looks like Tiny Tim's ukelele -- the amplifier has a jack for a 9V wall wart so will probably have to put in a buck converter as most of the Class D amps are 2.5 to 5.4V with built in voltage boosters.
I would prefer not to have to use BGA or micro-SMD but SOIC is fine.
how many mV does an electric guitar pickup put out anyway?
I would prefer not to have to use BGA or micro-SMD but SOIC is fine.
how many mV does an electric guitar pickup put out anyway?
Hi,
Can't help with the rest, but...
Based as a 20mV standard. Cheapies put out less, hot boutique pickups significantly more.
Cheers!
Can't help with the rest, but...
jackinnj said:
Based as a 20mV standard. Cheapies put out less, hot boutique pickups significantly more.
Cheers!
Jack, you've got a lot to choose from. There are parts from TI, National, AD, Maxim, Monolithic Power, etc. Just about any of them should be fine for a guitar amp.
I know it isn"t Class D ,But if you only need 2w and want battery power you might consider useing the LM386 IC.... I believe they can put out 1 or 2 w and can be Paralelled and Bridged for more output power and they are easy to use and sound pretty good in guitar amps....and you can probably find some in 8 pin DIP...
http://cache.national.com/ds/LM/LM386.pdf
http://cache.national.com/ds/LM/LM386.pdf
-->jackinnj, do as Minion say (LM386 works in class B, it is not class D but will do the work 😉 ).
There is neat little guitar amp called "Little Gem mkII" - 9VDC power supply, two LM386 (in BTL).
Use LM386N-3 or LM386N-4, then You can squeeze 2W from it 😉
http://www.runoffgroove.com/lgmk2-pcb.pdf
http://www.runoffgroove.com/littlegemMK2.png
There is neat little guitar amp called "Little Gem mkII" - 9VDC power supply, two LM386 (in BTL).
Use LM386N-3 or LM386N-4, then You can squeeze 2W from it 😉
http://www.runoffgroove.com/lgmk2-pcb.pdf
http://www.runoffgroove.com/littlegemMK2.png
You can try the ¨Little Rebel¨ too, it sounds very good and the name is cool. 😀
http://rebel.massberg.org/index.php
http://rebel.massberg.org/index.php
Nope, I am surrendering and gonna' use BGA -- TPA2010 -- they cost $1.55 -- filterless mono 2.5 watt and can run it off of a pair of "C" Cells.
I'm not gonna hand solder it -- will use the toaster oven technique and kester solder paste -- i first saw this in Circuit Cellar a couple years ago -- and have a dedicated Black and Decker oven which gets up to about 250C for the purpose.
Well, finally I did use the TPA2010D -- turns out that the KEC output amplifier was the only thing broken -- this is like the LM386 in a 9-pin SIP...fixed gain of, I guess, 50dB. I was able to mount a little PCB on some Molex headers to use the correct pins.
The KIA6123S which I replaced was good for 450mW -- the TPA2010 will do 2 watts!
I am still waiting for some surface mount ferrite beads. In the interim I am using a pair of ungainly 30uH coils wound on dowels.
The KIA6123S which I replaced was good for 450mW -- the TPA2010 will do 2 watts!
I am still waiting for some surface mount ferrite beads. In the interim I am using a pair of ungainly 30uH coils wound on dowels.
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