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Chip Amps Amplifiers based on integrated circuits

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Old 24th October 2005, 02:50 AM   #11
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OK another status pic..... If I keep this up I might actually finish it

this one with input resistors and signal earth wire attached. Its amazing what you see when you take a closeup looks much more horible than it does to the naked eye I think I need to stop shrinking the heat shrink with the soldering iron tip too

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Old 24th October 2005, 04:39 AM   #12
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Default almost there :)

OK not much to go for this channel now, just connection to input output and power......

Note that although the photo looks like pins are really close or touching, they have a safe distance

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Old 24th October 2005, 04:41 AM   #13
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and one from the back...... might be time to go back to the chassis
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Old 24th October 2005, 09:35 AM   #14
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Unhappy mabe I should have stuck to soldering

well I decided to do the rear panel...... holes went well except one where I don't think I centre punched deep enough and the bit must have slipped.... so one input socket is a bit wonky.....

but the real problem was with the hole for the power plug.... I got half way and my cheap nibbling tool decided that it had had enough of cutting 2mm aluminium and went on strike.... me being foolish and not thinking about it a little more carefully decided that the tungsten carbide cutting bit along with the mild steel case from the PC power supply that I got the connector out of would be real easy..... use the pc case as a template and just run around it..... hmmmm bad idea If I had have thought a bit longer I could have used my jig saw, or if I was really desperate chain drilled it, but I let speed seduce me and well now there is some extra ventilation around the power plug

Only other problem is that my fuse needs a 15mm hole and I don't have any drill bits that big!!

Oh well soldier on.....

oh and by the way there are some extra holes and a rounded off corner because this was a scrap piece of aluminium I had.....

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Old 24th October 2005, 12:22 PM   #15
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Some intricate soldering there!
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Old 24th October 2005, 03:00 PM   #16
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Thanks Ropie It's not as good as I would have liked, but that's mainly to do with the fact that I forgot to clean up all of the component leads.... still haven't learned after more than 20 years .... some weren't tinning properly so I ended up with some blobs due to having to add more solder to get it to tin Hopefully the second channel will be better, if I clean up all the component leads.

Here is another pic. It's starting to look like an amplifier now!! though after my gaf with the power socket hole, I'm feeling a bit hesitant about doing the switch hole!!! it's only a small one though, 13mm X 18mm, so maybe I should try chain drilling and filing it.....

man I wish I had some decent metalworking tools I have my battery operated drill, a jig saw and the dremel (and a now defunct nibbling tool).... a drill press would be very nice. I was reading Vikashes case thread earlier, came across it when I did a search on finishing aluminium. I'm so jealous of all your equipment Vikash!!! I've always wanted a lathe, and you have lots of other goodies too

anyway time for me to head for bed I think.

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Old 24th October 2005, 03:10 PM   #17
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That lathe still hasn't been switched on Table saw and drill press are dead handy for metal work, but none top the router as my fav tool overall! My 25 router is still king.
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Old 25th October 2005, 07:25 AM   #18
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Come on Vikash, surely you can turn up some nice equipment spikes or something To tell you the truth, I'm not sure what I would use a lathe for, I know there have been times I wanted one, but I think that was when I wanted to turn some special bolts for my Morris 1100.....

Haven't made any progress today, as I had to do my tax return, though I did just go out and buy some power cable, as the 12 gauge stuff I had was too heavy, and the thinner stuff (15A auto cable) was too stiff. So I got some nice 16 gauge super flexible OFC stuff..... might do a bit more this evening

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Old 25th October 2005, 07:49 AM   #19
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Come on Vikash, surely you can turn up some nice equipment spikes or something To tell you the truth, I'm not sure what I would use a lathe for, I know there have been times I wanted one, but I think that was when I wanted to turn some special bolts for my Morris 1100.....

Haven't made any progress today, as I had to do my tax return, though I did just go out and buy some power cable, as the 12 gauge stuff I had was too heavy, and the thinner stuff (15A auto cable) was too stiff. So I got some nice 16 gauge super flexible OFC stuff..... might do a bit more this evening

Tony.
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Old 25th October 2005, 09:15 AM   #20
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OK just attached the power leads..... I think this has been the hardest soldering job so far!!! I always dread soldering power leads on though

once again the camera doesn't hide any flaws and it also flattens the perspective making everything look like it is shorting together!! I think the closest gap between anything is at least 2mm, hopefully won't have any problems!

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