Hi Hannes!
do you have the idea how to lessen the impact of time constant 75us after 8kHz in your design
with the load of MM cartridge much less that advised by cartridge producer (for example 18kOhm for MM Shure V15IV)
to get quality of MC cartridge
on the base on the inforamation and discussion in there?: http://www.diyaudio.com/forums/analog-line-level/221298-bob-cordells-vinyltrak-6.html#post4212783
do you have the idea how to lessen the impact of time constant 75us after 8kHz in your design
with the load of MM cartridge much less that advised by cartridge producer (for example 18kOhm for MM Shure V15IV)
to get quality of MC cartridge
on the base on the inforamation and discussion in there?: http://www.diyaudio.com/forums/analog-line-level/221298-bob-cordells-vinyltrak-6.html#post4212783
Hi Pawel,
from a quick look it seems that this is a very cartridge specific issue and certainly not standard. I don't fully understand what's the point of that, so I have difficulties recommending a way to get there. But sure feel free to experiment!
Actually to get there, I would always recommend a AT150MLX or - even more delicate - a AT150ANV for most joy. These are one of the very few modern MM designs with low inductance, requiring a low input capacitance mm phono pre just like the high octane is. And they sound simply amazing 😉
from a quick look it seems that this is a very cartridge specific issue and certainly not standard. I don't fully understand what's the point of that, so I have difficulties recommending a way to get there. But sure feel free to experiment!
Actually to get there, I would always recommend a AT150MLX or - even more delicate - a AT150ANV for most joy. These are one of the very few modern MM designs with low inductance, requiring a low input capacitance mm phono pre just like the high octane is. And they sound simply amazing 😉
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I'd like to get one board. Please put me on the group buy if you decide to start one.
Also, are all parts currently available, or would you recommend to get specific hard to source parts ahead of time (while still available)?
Thanks.
Also, are all parts currently available, or would you recommend to get specific hard to source parts ahead of time (while still available)?
Thanks.
My board, as well as the mosfets for my F-6 build, arrived yesterday. Thanks for all your efforts!
Russellc
Russellc
Hi Pat and Russell! That's great to hear! Happy building!!
@noviygera: the 2sc2547 are the hard-to-get parts, and unfortunately it seems there are also fakes on the market. Of course they can be substituted easily with whatever low noise bjt you have on hand. However, I really like these parts and it won't hurt to have a number of them in the parts bin if you can get them.
For more info on that part, see e.g.
http://www.diyaudio.com/forums/solid-state/17285-ultra-low-noise-transistors.html
http://www.diyaudio.com/forums/analogue-source/154394-hps-4-0-phono-stage.html
@noviygera: the 2sc2547 are the hard-to-get parts, and unfortunately it seems there are also fakes on the market. Of course they can be substituted easily with whatever low noise bjt you have on hand. However, I really like these parts and it won't hurt to have a number of them in the parts bin if you can get them.
For more info on that part, see e.g.
http://www.diyaudio.com/forums/solid-state/17285-ultra-low-noise-transistors.html
http://www.diyaudio.com/forums/analogue-source/154394-hps-4-0-phono-stage.html
WTB:
2sc2547 (6 pcs)
this will be my next project!
Is there a reason not to make the board smaller?
2sc2547 (6 pcs)
this will be my next project!
Is there a reason not to make the board smaller?
The pcb îs smaller în reality than IT looks în the pictures. IT also contains both channels and regulator
Sent from my Nexus 5 using Tapatalk
Sent from my Nexus 5 using Tapatalk
The board is roughly 80x100mm, so smaller than a CD 😉
If you want it smaller, you have to go to SMD 😉
I actually thought to make it bigger to help people assembling it 😉
If you want it smaller, you have to go to SMD 😉
I actually thought to make it bigger to help people assembling it 😉
NEW BOARDS!
Dear all,
on our national holiday today the weather was great, but quite unexplicably I resisted and worked out new boards!
There are a few changes to the previous board, e.g. to make mounting of the board easier (it has now mounting holes) as well as it will fit into a normal Hammond 1455N1601 enclosure.
Then it also corrects a few warts and bugs of the previous version (C6/C106 are gone, CP1 is fixed and goes now to ground).
Oh - and of course the new board is RED 😎
The boards are currently manufactured and will be available in a few weeks. If you want to preorder one, just let me know!
Price of the new board will be 11 Euros, together with shipping that will arrive in total at 19 Euros.
Dear all,
on our national holiday today the weather was great, but quite unexplicably I resisted and worked out new boards!
There are a few changes to the previous board, e.g. to make mounting of the board easier (it has now mounting holes) as well as it will fit into a normal Hammond 1455N1601 enclosure.
Then it also corrects a few warts and bugs of the previous version (C6/C106 are gone, CP1 is fixed and goes now to ground).
Oh - and of course the new board is RED 😎
The boards are currently manufactured and will be available in a few weeks. If you want to preorder one, just let me know!
Price of the new board will be 11 Euros, together with shipping that will arrive in total at 19 Euros.
I would like a board also. I pm'd you about two until I figured out each board was stereo. I am a little slow, but I'm a little old too! Started collecting and ordering parts yesterday. Thank you Sir!
Hi Hannes -
Easier to build? Sign me up! I'd like one of the new boards, please.
I have one of the first batch of boards here, and am unlikely to use it with the new board on the horizon. If someone would like to get going on a build right away, I'd be happy to send it out for a small discount on the original price - $7, in the US only.
Easier to build? Sign me up! I'd like one of the new boards, please.
I have one of the first batch of boards here, and am unlikely to use it with the new board on the horizon. If someone would like to get going on a build right away, I'd be happy to send it out for a small discount on the original price - $7, in the US only.