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DIY High or Low Ouput Moving Coil Phono Stage

I am using 4 x 6v lantern battery's to give it +12v, 0, -12v so it should go for a long time. I think it sounds slightly better than the twin 9v's, which is amazing to say the least.

Check out RC airplane batteries. You can get some really slick Lithum rechargeable for relativity cheep. For @ $11 you can get a 3s battery (11.1v) 2200 mA that is @ 1" x 1.5" x 4" long. For a little more you could get a 4s (14.8v). You would have to research charging to do it safely but since you won't be trying to quick charge them, it shouldn't be much of a task to figure it out.
 
An interesting find while doing research on pre-amps.

View attachment 294005

The first part is almost identical because that's what it is, a transresistance/transimpedance amp, it's not a new idea, current in voltage out. I have a design at the moment with the front end of the Phonoclone 3 and the back end of the CNC. I may build it just to see how it sounds.

And those cheeky people in Japan said they designed it.:D

Here's what one builder on DiyAudio had to say about the Phonoclone 3:

"Hi. Just to report that I'm listening to my new re-installed music system (moved house this summer, you know a lot of boxes to go through, lost stuff...). I have a classic LP12, Ittok tonearm with DL103 and the PhonoClone3. Just one of the best phono preamp out there. Certainly one of the best cost to performance preamp you can build. If you need a MC superb preamp, build this one right there. It is a great sounding preamp, silent, delicate, a lot of details, everything ! It equals my Audio Research PH5 (My note: High end tube phono stage costing over $2,500.00), if not beating it, for a lot less. Thanks rjm for your time and efforts .
 
Check out RC airplane batteries. You can get some really slick Lithum rechargeable for relativity cheep. For @ $11 you can get a 3s battery (11.1v) 2200 mA that is @ 1" x 1.5" x 4" long. For a little more you could get a 4s (14.8v). You would have to research charging to do it safely but since you won't be trying to quick charge them, it shouldn't be much of a task to figure it out.

I actually have a design for a 3 cell Lion charger, and thought about using them, I must dig it out and have another looks, thanks for the info.
 
Hypno, could you discuss and maybe show your 4 X 6 lantern battery PS? I'm thinking of building this Phono stage.
 
The first part is almost identical because that's what it is, a transresistance/transimpedance amp, it's not a new idea, current in voltage out. I have a design at the moment with the front end of the Phonoclone 3 and the back end of the CNC. I may build it just to see how it sounds.

And those cheeky people in Japan said they designed it.:D

Here's what one builder on DiyAudio had to say about the Phonoclone 3:

"Hi. Just to report that I'm listening to my new re-installed music system (moved house this summer, you know a lot of boxes to go through, lost stuff...). I have a classic LP12, Ittok tonearm with DL103 and the PhonoClone3. Just one of the best phono preamp out there. Certainly one of the best cost to performance preamp you can build. If you need a MC superb preamp, build this one right there. It is a great sounding preamp, silent, delicate, a lot of details, everything ! It equals my Audio Research PH5 (My note: High end tube phono stage costing over $2,500.00), if not beating it, for a lot less. Thanks rjm for your time and efforts .

Please note that the stage circuit immediately previous inverts absolute polarity unlike the topic circuit, and must be comp'ed by flipping cart pin polarity as with the CNC add-on, unlike the original which flips in the 1st stage and again in the second stage yielding a polarity-correct output without comp required.
 
Hypno, could you discuss and maybe show your 4 X 6 lantern battery PS? I'm thinking of building this Phono stage.

I just took 4 x 6v lantern batteries and connected them in series, I took the middle connection as my ground. This gives +12v, Ground, -12v. You can power nearly any split rail op amp with this set up.

Looking top down.

6vBatteryOutline.jpg
 
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It would power it but I am not sure about the noise, when you use lomc carts you need a well filtered quiet supply to avoid noise and hum.

I prefer batteries for this reason as you have both low noise and no hum, but that's just me.
I'm using a Pyramid ps with my VLPS and it's dead quiet. My cartridge is a AT33PTG, and it's output is .5mV which is ran through a Hagerman Piccolo headamp with it's own wall wort.

I'd like to simplify the circuit, that's why this build looks good.
 
So, I'm close to ordering a set of boards and parts for one of these from RJM. Can I run it off of the 12 volt battery PS with the stock boards or do I need to get custom boards like the OP? I'm not sure I'm up to a custom build of that depth.
 
So, I'm close to ordering a set of boards and parts for one of these from RJM. Can I run it off of the 12 volt battery PS with the stock boards or do I need to get custom boards like the OP? I'm not sure I'm up to a custom build of that depth.

I can't see why you couldn't, each channel is on a separate board and you can see below the components surrounded by the red square would not be necessary. You would need to run V+ and V- directly to the op amp rails to bypass the supply circuitry.

PC3PCB.jpg
 
It's Alive!

Here you go, Ladies and Gents- Hypnotoad's MASTERPIECE!

It is everything he said in his review. Detailed , fast, clarity that is hard to describe, detail without a hard edge, bass is deep and attack is crisp.
Vocals- warm, engaging and frankly the best I have heard. The imaging is fabulous and the soundstage is very wide and seems to slowly fade into the distance. There is air between all the instruments- no matter how many or how complex. Oh, yeah, it is quiet. I mean, turn the amp WAY up with the arm raised and you have to look to see that the amp is turned on quiet.

The Bugle is now on the second shelf and will be the MM phono stage. Whether using a 40db Bugle with SUT or one modded to 60DB, this phono pre is clearer, cleaner and the music just flows.

The HTM (HypnoToad Masterpiece) phono pre is just far, far better than the reasonable cost would ever suggest. Mine is setup for the Denon DL-301 MKII with total gain aprrox 60DB.


All Hail the Hypnotoad!

:guitar: :banana: :guitar:

phonoHTclone.jpg
 
Here you go, Ladies and Gents- Hypnotoad's MASTERPIECE!

It is everything he said in his review. Detailed , fast, clarity that is hard to describe, detail without a hard edge, bass is deep and attack is crisp.
Vocals- warm, engaging and frankly the best I have heard. The imaging is fabulous and the soundstage is very wide and seems to slowly fade into the distance. There is air between all the instruments- no matter how many or how complex. Oh, yeah, it is quiet. I mean, turn the amp WAY up with the arm raised and you have to look to see that the amp is turned on quiet.

The Bugle is now on the second shelf and will be the MM phono stage. Whether using a 40db Bugle with SUT or one modded to 60DB, this phono pre is clearer, cleaner and the music just flows.

The HTM (HypnoToad Masterpiece) phono pre is just far, far better than the reasonable cost would ever suggest. Mine is setup for the Denon DL-301 MKII with total gain aprrox 60DB.


All Hail the Hypnotoad!

:guitar: :banana: :guitar:

phonoHTclone.jpg

Thanks Jim for the glowing review, I would put it up against any stage out there.

I put it up against every phono stage I have and like Secretariat in the Belmont Stakes, the only thing coming second was daylight.

Seriously it's that good.:music:
 
Thanks Jim for the glowing review, I would put it up against any stage out there.

I put it up against every phono stage I have and like Secretariat in the Belmont Stakes, the only thing coming second was daylight.

Seriously it's that good.:music:

How much time do you have in your modded 640P program? I was seriously considering looking for one and following your lead. Not now. I am listening to Joni Mitchell, Miles of Aisles which is a live concert and the crowd is all around me. Spectacular! :music:
 
I have a Toad-improved 640P in my 'A' system yet to be auditioned with an LOMC, presently running an HOMC. I want one of these for my experimental system.
 
After many hours of listening to my new stage I have come to the following conclusions.

The humble phono stage is one of the most important links in the chain, it is the first stage after the cart, if the sound is changed in anyway or any unwanted noise or artifacts included it will go through the rest of the system like that.

So our aim is to have the lowest noise and the most accurate unadulterated sound possible.

I think my search is over for this elusive beast, the stage talked about here is as close as I think I can come to lifting all those veils from the sound and having the most natural sound possible.

Noise is so low that you can crank up the volume and hear nothing until the needle drops, you have this black background, you only hear the music. On newer albums this is eerie on older ones even the surface noise is not distracting. That's why I like batteries so much, you don't have to worry about hum or mains noise creeping in. Problems with noise and hum that are present when using a mains PSU have been eliminated.

The detail is astounding, one of my tests for detail is those little sounds at the start of the first track on The Love album by The Beatles. There are birds singing and fluttering, there is also a fly that buzzes, don't ask me why they put this in but it's there. I can hear that fly now as clear as clear, my other stages can let me hear what I think is a fly but now it's so clear and distinct. Like I said all the veils have been lifted and the picture has been brought into focus.

Soundstage is as wide as I have heard and front to back, voices seem to float in the air in between the speakers. Every instrument is separated, there is no smearing at all.

Bass, midrange and highs are all equal, nothing stands out.

When I was trying different output caps I had too much detail which leads to harshness and then it was too smooth which had too little detail, I have it right in the middle now, smoothness and detail in harmony.

As I have said before you set it up to suit the particular cart you are using, which is a good thing as the gain and loadings are perfect for your cart.

On a scale of one to ten, I give it an eleven.:D
 
You've sold me on it, Hypno.

What cap did you settle on? If I missed it earlier, my apologies.

Also, will you be issuing boards for this one too?:D
 
If this thing with an LOMC is anywhere as good as the HOMC/Toad-ified '640P it's going to be something great.
 
You've sold me on it, Hypno.

What cap did you settle on? If I missed it earlier, my apologies.

Also, will you be issuing boards for this one too?:D

Settled on a 1uf Panasonic Polypropylene with a 0.1uf bypass cap on it, it's a perfect balance of smoothness and detail.

I have had to wrestle with a new PCB design program but I am thinking about it.

If this thing with an LOMC is anywhere as good as the HOMC/Toad-ified '640P it's going to be something great.

It's scary good Steve, I have a whole new record collection to listen to.:thmbsp: And it works with HOMC carts as well, just not MM/MI.
 
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