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The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G! - Page 39

post #571 of 2514
1/3/08 at 3:56pm
iQEM, I think that battery is for the 1st gen big iPods You could route the battery on the outside, try to fix some small BGs at the spot where the battery was, and route the signal to the headphone out. This wouldn't increase the size by that much.

Jon, have you messed with your iPod mini yet? I might be able to buy one off my friend for dirt cheap since he has 5 iPods.
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Gear mentioned in this thread:

Apple 30 GB iPod with Video Playback Black (5th Generation)
iPod Nano Headset Music Player
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Apple iPod classic 160 GB Black (6th Generation) OLD MODEL
post #572 of 2514
1/3/08 at 4:17pm
Quote:
Originally Posted by joneeboi View Post
What I'm guessing you can do is bypass the internal preamp and send the wires straight from the line in pins to the dock. Using your own high quality preamp, you can make some sort of line in dock (LID) to hook up to your iPod. If you have a LOD you can take apart or build, you can relocate the LO pins to the LI pins which are right next in line in terms of pin order. What would you be using your line-in for?
thanks for your answer. do you know the pins to bypass the preamp?

i would like to use it for recording, of course sind ipodlinux supports that (a bit of proof of concept..)

infinite
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post #573 of 2514
1/3/08 at 4:34pm
Quote:
Originally Posted by joneeboi View Post
For the record, we ought not to say that we are iModding these iPods. <snip>
Oopsie... Agreed. A true iMod offers more (professional work, warranty, etc. - Much as discussed in other threads re: commercial headamps vs DIYs).
I'd amend my post but then your reply/scolding would look funny

Quote:
Originally Posted by joneeboi View Post
<snip>
I don't see how this is different from what everyone's been doing this entire time.
Are you saying you're planning on using the dock for the signal? If you are, you could take some nice, hi-res, macro shots of the inductors before the dock so future 3G diyModders can have some idea of where to go.
Perhaps I need to research more, but based on 3G pic in the OP it *looks* like C13 & C16 are coupling caps (IOW, the SMD couplers from the image here ).
Not sure if there are more components in stock 3G lineout circuit than the 3x2 SMD ones coming off pins 16 & 17 in that pic. If there were no other stock components there I was thinking I'd just remove C13 & C16 then wire BGs in their place (no new resistors, lineout jack, etc.).

This threads gotten so long so I'm not sure but it *seems* like most mods involve replacing the route from the new coupling caps to a lineout (e.g. re-wired headphone jack or pigtail). I'm thinking a total of 2 caps & 4 wires (to both orig coupling cap pads) as the whole mod (leaving SMD resistors in path, etc.)
Again, so much info here I could certainly be the one confused
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post #574 of 2514
1/3/08 at 7:54pm
Thread Starter 
CAvanessia:

I haven't done anything to the iPod mini since the biggest compact flash card I have is 128MB, and the iPod won't connect to the computer. If you open it up, you can immediately identify the target caps, but I will take pictures for convenience.

infinite:

Which iPod are you looking at? I posted all the datasheets of the known Wolfsons on the OP.

cfcubed:

From what I understand, you want to leave the rest of the path untouched save for replacing the coupling caps with BGs. I can't guarantee what kind of sound improvement/change you'll have, but I wouldn't recommend traveling your path. What you're doing is passing a "high quality signal" from the BG through the muddy waters of the rest of the weak amplifier circuit we've all been trying to bypass. Think of the newbie audiophile pairing a $1000 CD player with $10 headphones. He spent so many dollars just to have the purity of the signal crushed anyway. You have so many weak links in your chain (SMD resistors, cheap opamp stage, etc.) that it probably wouldn't be worth the trouble. I can't identify the line out dock pins in the iPodlinux 3G PCB images, but if you can find them, you should do it. Then again, I found desoldering the inductors in the 4G iPod pretty intimidating, but it can still be done with loads of patience and confidence.
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post #575 of 2514
1/3/08 at 8:01pm
Quote:
Originally Posted by joneeboi View Post
<snip>
cfcubed:

From what I understand, you want to leave the rest of the path untouched save for replacing the coupling caps with BGs. I can't guarantee what kind of sound improvement/change you'll have, but I wouldn't recommend traveling your path. What you're doing is passing a "high quality signal" from the BG through the muddy waters of the rest of the weak amplifier circuit we've all been trying to bypass. Think of the newbie audiophile pairing a $1000 CD player with $10 headphones. He spent so many dollars just to have the purity of the signal crushed anyway. You have so many weak links in your chain (SMD resistors, cheap opamp stage, etc.) that it probably wouldn't be worth the trouble. I can't identify the line out dock pins in the iPodlinux 3G PCB images, but if you can find them, you should do it. Then again, I found desoldering the inductors in the 4G iPod pretty intimidating, but it can still be done with loads of patience and confidence.
Yes, that's what I *was* thinking... Good points, I guess I'll go the full route.

Thanks for the quick & thorough response.
Regards,
Chris
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post #576 of 2514
1/3/08 at 10:17pm
I am waiting for parts for my next gen ultimate S-Cap dock so I decided to rework my ipod.

I updated my original post here:

http://www.head-fi.org/forums/3551999-post391.html
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post #577 of 2514
1/3/08 at 10:42pm
Wow vvs, there are no impressions on the sound?!? Is it better than the simpler two Sonicap dock?
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post #578 of 2514
1/3/08 at 11:29pm
Thread Starter 
That's some amazing work, vvs_75. I really like how you fit the nano into the Hammond. What parts are you waiting for?
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post #579 of 2514
1/3/08 at 11:42pm
Quote:
Originally Posted by joneeboi View Post
That's some amazing work, vvs_75. I really like how you fit the nano into the Hammond. What parts are you waiting for?

Thanks!
Small value sonicaps to bypass big ones. I am pretty much making ALO LE but with USB jack for charging and transferring data.


Here are pictures of an LE ALO V-Cap Dock.

RapidShare: 1-Click Webhosting
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post #580 of 2514
1/3/08 at 11:42pm
good job, VVS_75! Impressions would be great too relative to the sonicaps.

edit: just saw your reply. I ordered 4.7uf sonicap gen I's and 0.1uf gen IIs yesterday. I made my case before I left for school. All I need to do is just solder a few leads hopefully. =)
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post #581 of 2514
1/3/08 at 11:49pm
Quote:
Originally Posted by powertoold View Post
Wow vvs, there are no impressions on the sound?!? Is it better than the simpler two Sonicap dock?
It sounds not bad at all! Is it better than Sonicap dock? We'll see. It’s BG so they need forever to settle down!
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post #582 of 2514
1/3/08 at 11:54pm
Quote:
Originally Posted by CAvanessia View Post
good job, VVS_75! Impressions would be great too relative to the sonicaps.

edit: just saw your reply. I ordered 4.7uf sonicap gen I's and 0.1uf gen IIs yesterday. I made my case before I left for school. All I need to do is just solder a few leads hopefully. =)
Good! I just ordered mine today. Sorry forgot to let you know.
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post #583 of 2514
1/4/08 at 12:07am
Quote:
Originally Posted by vvs_75 View Post
I am waiting for parts for my next gen ultimate S-Cap dock so I decided to rework my ipod.

I updated my original post here:

http://www.head-fi.org/forums/3551999-post391.html
Impressive - nice job!

Will
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post #584 of 2514
1/4/08 at 12:44am
Thread Starter 
I just looked over the iPod mini, and I can't find where the line out signal goes to after the chip. Normally, the coupling caps sit right next to the Wolfson, but I don't see it anywhere around it. I tried finding it, but I'm having trouble. Maybe you guys can help me here. The line level signals come from pin 16 and 17 according to the WM8711 datasheet. I can't see where they're going. Those giant caps give us the click wheel-controlled signal. If it's too much trouble to find where those ones go, one can just replace the yellow caps and turn the click wheel volume all the way up. The left cap, C86, is the right channel, and the right cap, C87, is the left channel.



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post #585 of 2514
1/4/08 at 2:12am
Here are two pics of my enclosure. I bought it at a "dollar store" for $1.50. It's made of steel and the top slides off. Also I bought this "eyelet" tool that allowed me to make those holes. All the wires are installed permanently in the enclosure with hot glue. I left the wires extra long inside for the parts that I'm waiting for.

I bought a pair of Nichicon (radio shack) 1000uf 50V caps for a few bucks just to try them out against the BGs.

Note. I know the setup is NOT for stock iPods, but I had to plug my 80gb video for the photo since my diyMod Nano was charging.




edit: Jon, I will see if I can bum the mini from my friend and see what I can find out. Although I probably won't be much help. =D The mini uses a CF card? Interesting. I thought it was hard-drive based.
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Gear mentioned in this thread:

Apple 30 GB iPod with Video Playback Black (5th Generation)
iPod Nano Headset Music Player
Powered by NexTag
Apple iPod classic 160 GB Black (6th Generation) OLD MODEL
Head-Fi.org › Forums › Misc.-Category Forums › DIY (Do-It-Yourself) Discussions › The Apple diyMod: My Take on the Famous iMod [56k killer] Featuring 3G, 4G, 5G and nano 1G!