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Pictures

Started by syndromet, November 19, 2006, 09:52:46 AM

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Robin755

My little LM1875 Amp on top of the 2 fender-style cabs I recently build


syndromet

looks good. How did you construct the cabs? I like the wheels....

Robin755

thnx, here's a picture of the back,
I made it so, that I can attatch a back-panel for closed-back,
and for open-back operation I can use 2 slices of wood with a space between them as rearpanel

I've checked your movies, sounds really great, what preamp did you use?




armstrom

Here are some pictures of my first and still on-going build:
The amp is a bridged TDA2005 with a modified ruby circuit as the preamp. Power will come from an external 12V power brick. The speaker is a 6" Weber signature ceramic. The cabinet started out life as an IKEA flower pot and was trimmed and shaped to its current form. The "chassis" is half of a Radio Shack aluminum enclosure. I'm having a leather handle made for it tomorrow since none of the ones I've found online are small enough (box is only 8" wide).

I hope to have it all buttoned up before the weekend... Hopefully everything works  :-\
Opinions? I know it's kinda retro looking... but it's being built for a retro kinda guy.






Robin755

Looks great!!

got any pictures from the back and inside the chassis?

armstrom

Sorry it took so long to reply. Here are the latest pictures of the hurricane.
Also, here's a sound clip a friend recorded for me. Fair warning, it's about 2.5MB.
http://www.mr2-power.com/Hurricane_test_2.mp3








darwindeathcat

Hey man, Both your amps look and sound great! I just finished my little lm1875 job, using a modified professor tweed as the preamp. It works and sounds good, but I'm still "tweaking" it a bit. I've got the prof set for TOO much gain, so I need to mod it a bit (luckly I socketed the caps in the FB loop), and I blew the currently limiting resistor on my power LED, so I need to rewire that too. Once I get those things fixed, I'll post some pics and sounds too...

Congrats on the successfull Build!
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smadin

Agreed — that looks fantastic!  Very nice work.

darwindeathcat

Well, I have just finished my first amp build with some success! It's a Professor Tweed modded for 12v, slightly more gain, and tweaked for harmonica (better frequency response) that drives an LM1875 power amp module. I built the prof tweed and power supply on vero, and used the lm1875 mosule from qkits.com. I salvaged the chassis from a defunct old tube radio, got the transformers, jacks, leds, wire, and pots from a pair of old 8-track hifi tape decks, and got the heat sink, mains jack, mains cable, and mains fuse, from an old computer power supply. I sused new switches.

I spent maybe $10 to purchase all the salaged materials from Savers or the Goodwill, and I spent another $10 on the new parts, and about $13 on the lm1875 kit. All told that's about $30-$35 bucks for the whole shebang--not bad if I do say so myself!

Here's a YouTube clip of the amp in action, and I'll follow up with some close up stills, and I'll throw some schematics up in a new thread over in the schematics forum.

<object width="425" height="350"> <param name="movie" value="http://www.youtube.com/v/RiV78_rUv8c"> </param> <embed src="http://www.youtube.com/v/RiV78_rUv8c" type="application/x-shockwave-flash" width="425" height="350"> </embed> </object>

YouTube link: http://www.youtube.com/watch?v=RiV78_rUv8c
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darwindeathcat

okay, here are a couple of pictures of the outside. Note the harmonica in the first pic  ;)
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darwindeathcat

And here are some of the "guts". First and overview, then a zoom of the prof tweed circuit, then the lm1875 board from qkits...
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armstrom

looks good. I'm digging the retro enclosure