just wanted to say that this is the most detailed and transparent phono stage I've ever heard. I thought my olde Threshold FET-10/PC was _really_ good, but in comparison 'The Phono Stage' makes the FET-10 sound muddy and indistinct. Now I feel an urge to upgrade my entire turntable system... thanks for the good work on this PCB and circuit - it's truly a wonder.
Question re : PCB Boards needed?
Hello Peter.
I am very interested in your phono stage but have a question in regards as to how many PCB boards are actually needed for the build.
In post # 77 you stated:
"You will need two PS boards, but could do with only one phono board by cutting it in half. The layout allows separate wire feed with dedicated bypass caps. I will be presenting it soon.
However, constructions wise, it's easier to simply populate one side only (phono) on each complete board."
In the excellent photo examples presented in this thread it looks like there is only one Power Supply (PS) PCB board and one Phono PCB board being used.
Have you had a chance to document the use of 2 PS boards?
Is my assumption correct that one could either use:
(a) one PS PCB board and one phono PCB board for a build
(b) or two PS PCB boards and two phono boards for a build?
Thank you for your time
Cheers
Frank M
Hello Peter.
I am very interested in your phono stage but have a question in regards as to how many PCB boards are actually needed for the build.
In post # 77 you stated:
"You will need two PS boards, but could do with only one phono board by cutting it in half. The layout allows separate wire feed with dedicated bypass caps. I will be presenting it soon.
However, constructions wise, it's easier to simply populate one side only (phono) on each complete board."
In the excellent photo examples presented in this thread it looks like there is only one Power Supply (PS) PCB board and one Phono PCB board being used.
Have you had a chance to document the use of 2 PS boards?
Is my assumption correct that one could either use:
(a) one PS PCB board and one phono PCB board for a build
(b) or two PS PCB boards and two phono boards for a build?
Thank you for your time
Cheers
Frank M
Normally, a single board is sufficient for the project (PS and phono pcb are separated with a scoring line)
The upgrade would be using separate supplies for each channel, and then you would need one phono PCB (you can cut it in half if you want to keep channels separately) and two PS boards.
The upgrade would be using separate supplies for each channel, and then you would need one phono PCB (you can cut it in half if you want to keep channels separately) and two PS boards.
I'm afraid this is probably somewhere in this thread, but I've read it (read most of it a while ago) and haven't seen any instructions for ordering the boards for this project. Nor what's included in terms of instructions other than this thread. Can someone illuminate me? Thanks.
Carl
Carl
For all orders you need to contact me through email. The board is $40.
I don't think more instructions are needed than what's posted here, but of course, I can answer any additional questions.
I don't think more instructions are needed than what's posted here, but of course, I can answer any additional questions.
L
LaraBingleHo
Hi Peter,
Would it be ok to use one board per channel for balanced operation ? I have another balanced phono that was built from four mono boards but it sounds decidedly odd (when compared to my Klyne)
Cheers,
Lara.
Would it be ok to use one board per channel for balanced operation ? I have another balanced phono that was built from four mono boards but it sounds decidedly odd (when compared to my Klyne)
Cheers,
Lara.
Hi Daniel, those V -caps -how long do they take to run-in?
my phonostage is dead quiet but yet opened up after 20 hours.
my phonostage is dead quiet but yet opened up after 20 hours.
I don't think you can take just two separate channels and use them in balanced mode, as this would effect filter's characteristic.
Chassis / enclosure recommendations?
Can anyone recommend a chassis /enclosure? I've looked at the extruded Hammond enclosures but they are a little small . Perhaps a DIY enclousre is the route to go with this board?
Sugestions welcome.
Thanks
Frank M
Can anyone recommend a chassis /enclosure? I've looked at the extruded Hammond enclosures but they are a little small . Perhaps a DIY enclousre is the route to go with this board?
Sugestions welcome.
Thanks
Frank M
I'm using 2x3" square aluminum tubing (available from Metal Supermarkets). All you need to add is front and rear panels.
I used the Hammond extruded enclosure by breaking off the amplifier and mounting it higher than the power supply. It all fit nicely, with a copper spreader for the TO-220 chips tied to the bottom of the extrusion. Will post pictures later. Enjoying listening to it too much to take it out of the system for pics.
I ended up using a wine box from the LCBO and suspended the phono section on elastic banding from a fabric store...
Byron
Byron
I used a Hammond Extruded and made custom panels via Front Panel Express. The chassis _was_ a little short and I just barely managed to make everything fit. The IEC jack was really really close to the transformer though. On the RCA side, keep everything high to stop physical interference with the board/RCA jacks.
btw - I got in a Denon 103-R yesterday and the volume level is perfect. I was amazed that I actually got more gain with the .28mV cart versus the 2.5mv of my old Dynavector 10X5. I suppose that is the function of the zero impedance input (which I still have a hard time wrapping my mind around).
btw - I got in a Denon 103-R yesterday and the volume level is perfect. I was amazed that I actually got more gain with the .28mV cart versus the 2.5mv of my old Dynavector 10X5. I suppose that is the function of the zero impedance input (which I still have a hard time wrapping my mind around).
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hi Peter, regarding C3 cap on phonoboard, is there any advantage if i use other film cap, can other lower capacitance value be ok?
Thanks
Thanks
I find BG N better than most film caps and in that location 10uF reasonable quality film cap would be very large, so I don't find any advantage going with something else here, unless you can't find BG N caps anywhere.
Hi peter, BG have dried up for a while now, i am using wima as suggested by you ,just wonder if lower cap- 4.7uF film cap would be a better choice?
Hey Peter (and everyone else)
Just wanted to let you know...I originally had the dynavector 17D3 installed on my 'table, and while it sounded really good, at 38Ohm internal impedance with a 0.3 mV output, I just wasn't getting enough gain with my pass B1.
Anyway, I recently acquired the new Lyra Delos - at 5.5 Ohms and .6mV output, it has more than enough gain and sounds fantastic!
I would recommend this cartridge to anyone. Stunning dynamics and bass extension, smooth highs and it's also an excellent tracker!
Regards,
Byron
Just wanted to let you know...I originally had the dynavector 17D3 installed on my 'table, and while it sounded really good, at 38Ohm internal impedance with a 0.3 mV output, I just wasn't getting enough gain with my pass B1.
Anyway, I recently acquired the new Lyra Delos - at 5.5 Ohms and .6mV output, it has more than enough gain and sounds fantastic!
I would recommend this cartridge to anyone. Stunning dynamics and bass extension, smooth highs and it's also an excellent tracker!
Regards,
Byron