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Dec 28, 2009 19:17:11 GMT
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Aaaaaages ago SWMBO's brother gave me a Roberts Radio to convert to an ipod dock. I never actually got around to it so I decided it would make an ideal Christmas pressie. This is a photo of the finished article:  I was given a dead Roberts Radio. The speaker was mullered and the guts were already ripped out so I just had an empty shell to work with. Inside I've fitted it with a 4" 20W twin-cone Pioneer speaker to replace the pathetic offering it came with (probably). The amplifier is a 1W per channel TDA2822 which I've found you can overdrive quite easily with a few more volts on the supply side, powered by 4 AA batteries:  The amp is on the left soldered up on strip board, really basic reliable stuff which can be upgraded later for something a bit more manly if needed. Battery box is mounted on the door:  On the back is the on-off switch and the headphone cable:  I really wanted to have it as a 'dock' to slot the ipod into but I couldn't find a suitable ipod dock unit with a volume control so I opted to just use a cable. I'll keep looking because I have another old radio to convert and the MDF panel I made for the top of this one is easy enough to modify. Hope you like  |
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Last Edit: Dec 28, 2009 19:20:10 GMT by Deleted
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Dec 28, 2009 19:25:35 GMT
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very smart & very jealous ;D
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rysz
Club Retro Rides Member
Posts: 2,558
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Dec 28, 2009 19:41:30 GMT
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I am in the process of doing similar with an old sanyo - mark 2 will have an ipod lead hacked into it so it will charge at the same time as well!
Love those Roberts Radios - top modding Senor 69.
Rysz.
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Dec 28, 2009 20:23:43 GMT
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I do like these sort of mods.
Nice one J69
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Dec 29, 2009 18:04:49 GMT
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very smart jonny !!
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Mark
Club Retro Rides Member
Posts: 2,097
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Dec 29, 2009 21:37:57 GMT
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Good work, looks fantastic and very subtle!
Just a quick thought on the amplifier end - a Sonic Impact T-amp would work great with this application, you could even have enough room to fit 2 speakers inside etc.
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Dec 29, 2009 23:54:30 GMT
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and a big battery like a lead-acid or a salvaged nimh mobile phone battery or two perhaps |
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75 Range Rover 2 door 82 Range Rover 4 door
84 Range Rover 4 door 78 Datsun 120Y 2 door
78 Datsun 620 Pickup 81 Datsun Urvan E23 86 Datsun Vanette van
98 Electric Citroen Berlingo 00 Electric Peugeot Partner 02 Electric Citroen Berlingo
04 Berlingo Multispace petrol 07 Land Rover 130 15 Nissan E-NV200 15 Fiat Ducato
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Dec 30, 2009 14:19:37 GMT
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I've got a little 1.3Ah 12V lead acid, ideal for some high outputs, but unfortunately it doesn't fit in the other radio  Mk2 is on its way. It's a lot older and scabbier than this one  |
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Dec 30, 2009 20:14:48 GMT
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That's brilliant! since there's a Mk2 planned, if you don't use an actual iPod dock, I reckon having a a proper minijack socket on the back rather than running a wire straight out under the switch would look tidier, but that would be me being fussy |
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...proper medallion man chest wig motoring. |
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Dec 31, 2009 18:05:56 GMT
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That's brilliant! since there's a Mk2 planned, if you don't use an actual iPod dock, I reckon having a a proper minijack socket on the back rather than running a wire straight out under the switch would look tidier, but that would be me being fussy Agreed. Also i personally would have wanted a retro volume knob, instead of using the ipod, wasn't there one on the original radio? Nice build nonetheless, i love stuff like this |
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TS
Part of things
Posts: 558
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Dec 31, 2009 19:32:08 GMT
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Nice. No knot in the cable to stop it being pulled out of the PCB? |
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Very nice, I'll be attempting something very similar with a picnic radio shortly.
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Remade In Australia
thereimaginarium.com.au
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Agreed. Also I personally would have wanted a retro volume knob, instead of using the ipod, wasn't there one on the original radio? I didn't get the rest of the radio unfortunately, just the empty box. Nice. No knot in the cable to stop it being pulled out of the PCB? ![]() ![]() Nah, it's well jammed in there ;D |
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capriscort
Part of things
old fords never die
Posts: 92
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Jan 12, 2010 19:18:49 GMT
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Great idea  |
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Jan 19, 2010 10:09:53 GMT
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That looks great, and is along the lines of something I am trying to do at the minute.
I have an open question to anyone electrically minded, in an old tuner, is it possible to isolate and re-use just the amplifier module?
I was looking at a moden mosfet amp module (6-10W stereo) but then I thought, why can't I grab the origianl amp part of the tuner, and power it from a PC PSU?
It's a 1970's(I think) Wharfedale Denon, and is part amp part tuner, as it has aux and turntable inputs.
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Jan 19, 2010 11:09:05 GMT
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If it's old enough you probably can  When I was at school I scavenged the amp off a broken system they had lying around in the D&T department. It was a bare chassis with some heatsinks and there was a transformer from something else with a PSU chassis attached. It was +/- 35V so ideal. If you know your circuits then the PSU is easy enough to work out. Follow the direction of the diodes and read the capacitors and you can work out which is +ve, -ve and 0V. The amp will be harder, but you should be able to easily find the 0V line on the circuit board because it's the biggest one with most connections. Output is usually straightforward, especially if there are wires still attached because they are bigger than the input wires. Power isn't too hard to work out if you know where the power goes on a mosfet or transistor, then you can track it back on the board and tap it in. The problem is going to be if the tuner circuit is integrated with the amplifier circuit, because you'll have to tap the input in somewhere and the input level might not be the same as what you put in from your iPod etc. You'll only find out by switching it on ;D 47K logarithmic potentiometer is an ideal value for the volume control on the input. |
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Jan 19, 2010 11:46:13 GMT
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Excellent, thanks, I might take some piccies of the inside later, it's definatley not mosfet so at least the components/circuits are nice and big.
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