book collections email follower instructable user
Here's my take on the famous Little Gem mini guitar amp.
All details on the electronics can be found at runoffgroove.com.
http://www.runoffgroove.com/littlegem.html
The case came from Jameco p/n 11886.
The speaker bezel is the rim of a tin can that was epoxied to the case.
The disk in the rear serves as a cord reel.
irishjim684 years ago

I absolutely LOVE the look of this. Those 386 based amps really ROCK as well.

garagemonkeysan (author) 6 years ago
Thanks! : )
jrace26 years ago
Hi, this looks great, makes me want to get back into this sort of thing when I get my soldering iron situation sorted! :)

evolution mastering
NunoMorna6 years ago
Hi. I've been studying the schematics and the pictures you posted and since I'm a beginner I'm frustrated because I don't understand a few things.

For instance, where do I put the speakers, dc-in, dc-out, the on-off switch, the 5K vol pot? That's not represented in the schematics, is it?

I apreciate the help you can give.
garagemonkeysan (author)  NunoMorna6 years ago
Hi NunoMorna -
Sorry, the dc-in and dc-out are special to this build and not necessary.
Your other questions can be found at this great Instructable.
https://www.instructables.com/id/The-Process-of-Building-a-Cigar-Box-Guitar-Amp-L/
Good luck! : )
myakka8 years ago
someone gave me a mini guitar amp that you can buy online for $20. they said it was broken but i took it apart and found that it was just a disconnected wire that runs to the male input/output jack. it runs on a 9 volt and it doesn't require a cable to connect to a guitar. so i stripped it down and went to LOWS and bought a slab of pine wood for $3. i cut the wood into 4"x3" pieces and made a box, added all the components and designed it to look like a Marshall half stack. so now i have a mini Marshall half stack for $3! thanks for the inspiration - myakka
garagemonkeysan (author)  myakka8 years ago
Great! You should post the build! : )
garagemonkeysan (author) 8 years ago
Thank you! : )
curator8 years ago
can u post the schematic for the circuit i like your instructables!
garagemonkeysan (author)  curator8 years ago
There's a schematic on the link to the Runoffgroove site. Thanks for the comment!
jm568 years ago
What speaker are you using?
garagemonkeysan (author)  jm568 years ago
Sorry, the speaker I had in my junk box and I forgot where I got it. There's no name or number on it either. Any 4 or 8 ohm speaker should work.
jeffrey_om9 years ago
this is very cool   how much is the price to make this?

sorry for my bad enlish
garagemonkeysan (author)  jeffrey_om9 years ago
 Thanks! Sorry but I didn't keep track of the cost of this build. Most parts were spares or left overs. The most expensive part was the box itself. About $9.00 US at Jameco. : )
jameco iz da best!
sweet, how's the sound?
garagemonkeysan (author)  corey_caffeine9 years ago
Thanks. It sounds similar to the famous Smokey Amp. http://www.smokeyamps.com/
nomuse9 years ago
Oh, my, that's purdy. I like the cord reel, too -- great idea.
garagemonkeysan (author)  nomuse9 years ago
Thank you! : )
oooooooooooooooooooooooooooohhhhhh.........................
Hooorah a fellow hhgttg fan
 Thhhaaaaaannnnks! : )
junits159 years ago
you sir, should should be employed n making computer cases.  I like the case more than whats inside.

very nice job!
*****
garagemonkeysan (author)  junits159 years ago
Thank you! Stay tuned, I'm working on a case for some powered speakers. : )
I will!
Can you post some pictures? Mine worked fine until I bent a tiny piece of solder over to touch a contact. Make sure there are no shorts.
That thing is gorgeous, very nicely done.  How does it sound?
 Thank you. Sound is okay for a practice amp. : )
 does this work on a bass
garagemonkeysan (author)  emedina949 years ago
 If you go to the runoffgroove site there's a note on the drawing about playing with the value of the 220uF cap. However, I am not sure if that will turn it into a bass amp. As I mentioned below I've got almost zero experience with amps. : )
I tried mine without modification with a bass, and it sounds like the beginning note of Tom Sawyer. Also managed to cram the thing into the original speaker box.
CIMG0203.JPG
garagemonkeysan (author) 9 years ago
Hello gunsigma. Sorry, I'm not an amp expert. In fact, this is the first amp I've made. Maybe other readers can help. Here is a forum you can try www.ssguitar.com too. 

Very nice!
garagemonkeysan (author)  JamesRPatrick9 years ago
Thank you! : )
220VAC9 years ago
VERY cool looking!  Q - what's with the two small square holes toward the back and bottom of the box?
garagemonkeysan (author)  220VAC9 years ago
Thank you! Very observant! The holes are for a transformer in/out cords. The enclosure also houses the transformer. I didn't get in the photo though.
dofing9 years ago
how big is your dick?
you can come over and fix my gutter anytime =0
lowercase9 years ago
 very nice, really well done.
garagemonkeysan (author)  lowercase9 years ago
 Thank you! : )