Clone Note aka Lighter Note rev 4
This is a full kit including all parts necessary to create the circuit. You provide chassis and a DC source from 9-24VDC. Just a few milliamps.
A nice review and a peek at a completed CloneNote are HERE http://robmid42.wixsite.com/diyaudiokits/clone-note-preamplifier
So, this is the Clone Note. This is my 4th LDR based attenuator. The first was a Lighter Note, the second was a tiny attenuator stuffed into the sleeve of an RCA cable (you guys never saw that), the third was yet another Lighter Note design and this iteration is really its own beast. People loved, really loved, the Lighter Note and I did too but there were some problems. The Clone Note, I believe, transcends those problems and makes the Clone note a very simple design. It looks complicated but that’s only because it’s the same 2 components repeated 24 times for each channel. So, what were the problems with the Lighter Note that the Clone Note transcends? Here’s the list:
- Lighter Note had a schematic I didn’t want to share and Clone Note is so simple there is nothing to lose in sharing. You will receive the manual via pdf which describes the functions of the circuit and how to build it.
- Lighter Note was difficult for people to understand even after many many long explanations. Clone Note I do not foresee being so.
- Lighter Note required matching of LDRs. Clone note uses LDRs with no matching required.
- Replacing Lighter Note LDRs cost $35. Replacing a Clone Note LDR is about $3.
- Troubleshooting the Lighter Note was an arduous ordeal. Clone Note? There’s about 3 possible problems if it ever breaks. Put your mind at ease as this circuit is not stressed at any component. It will last a lifetime.
- Lighter Note had a possible working total resistance (potentiometer equivalent) of about 2k to 22k. Clone Note can be any value.
- Lighter Note had a minimum volume problem. 40 Ohms shunt resistance. Clone Note goes down to 4ohms of shunt resistance. 10x less!
Well, my goal with this design was to come up with a circuit that you could build easily, understand easily and, if necessary, repair easily. I ended up with more than that. The Clone Note is easy to build, understand and repair. Its also cheap to repair. Its more reliable, its resistance is much more stable, channel matching is as close as 1% to .01% with most volume positions being somewhere in the middle and its completely possible to get perfect channel matching if you feel like it. The 3 boards stack on top of each other using standoffs. You can then mount the entire thing right on your faceplate making an integrated amp very easy to stuff in a box OR you can put the switch at the front of your chassis and the channels right at the back centimeters from your RCA jacks. None of the parts in this design are being overworked and I expect the circuit to live decades without failure. If an active part fails the circuit defaults immediately to mute. Did I mention it sounds great!? It does sound great and it sounds like LDRs which is why you’re here and its why you’ll enjoy this attenuator most.
I have sold a few of these already and while I feel that this circuit sounds better than my Lighter Note did, so do my customers. I have been told it smokes the Tortuga and was the best preamplifier another customer had ever heard. You wont be disappointed. And by the way, do you want balanced? Easy. Just remove ground and use it as an input. Put a Resistor Replacer at this new input and set its resistance equivalent to the Clone Note's LDR value. Bam. Balanced.
- Item #: CloneNoteKit