Changed from RCA to BNC for digital signal.
75ohm Coax cable for internal wiring of digital signal. 4mm diameter.
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75ohm Coax cable for internal wiring of digital signal. 4mm diameter.
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All wiring except from transformer is now in place.
This is how I'll make the secondaries longer and also protect them from shafing against the copper wall.
This is how I'll make the secondaries longer and also protect them from shafing against the copper wall.
Started on a digital interconnect between my SB Classic and the DAC.
Waiting for a BNC-connector at the DAC end to finish it.
Waiting for a BNC-connector at the DAC end to finish it.
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Got the ECC86 I traded for today 🙂
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Way OT, but my amazing fiancé got me this portrait of my dog Kid that passed from cancer about 4 years ago. He was a once in a lifetime dog.
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2,2uF from ECC86 to RCA-out. 100Kohm between OUT & GND.
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PS, 4700uF cap, resistor and 2SK170 with plateresistor in the form of a trimpot.
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Was thinking of braiding the PS wires and do the wiring like this, any thoughts?
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Hi Jonas, Keep up the good work. The picture of Kid is real nice. I had a dream the other day about Mr. Data. It was a nice one really had the feeling that I spent time with him. Still just a dream I know. It wasn't sad. Maybe I'm finally at the point to adopt another friend ( in a year or so). I will be doing some work on my second build next week. I'm still working on my new Preamp. Dave
Thanks Dave 🙂
I hung the painting of Kid on the wall on my side of the bed, this way I see him every night.
I've gotten to the point where I remember him with joy, but it's taken me four years to get over the sorrow.
I hung the painting of Kid on the wall on my side of the bed, this way I see him every night.
I've gotten to the point where I remember him with joy, but it's taken me four years to get over the sorrow.
re-worked the layout after some good advice...
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Digital wiring done.
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Hi Jonas, Yes, the revised position of your board is better, you want to avoid hum issues. I see you haven't moved that resistor yet on the digital input. Actually it will work, it is just better to move the resistor across the terminal block to properly terminates the coax for lowest jitter. They use the correct parts just in a real odd layout. See the data sheet to see what I mean. 🙂 Dave
Hi Dave,
No I haven't gotten around to it yet. It's still on my "to do" list though.
Shorter wires with this layout and the tube is far away from anything that could interfere.
PS for the tube buffer will be external too.
No I haven't gotten around to it yet. It's still on my "to do" list though.
Shorter wires with this layout and the tube is far away from anything that could interfere.
PS for the tube buffer will be external too.
Looking good - actually VERY good.
Your work is elegant and the new layout to me seems first rate.
All the watchers must be eagerly waiting switch on and your listening impressions.
Hurry up !!
OK confession time - I tried a proper NOS. ( not just the wire trick )
I can't believe I did it.
I have a machine which I trash and just try things - y' know...the one you don't really care about and I added a re clocker module that does the NOS at the same time.
I am listening and looking at the wall where the music comes from and trying to find criticisms and negatives and...there are none.
The player is already tricked out with diy teddy regs everywhere, full cap change, fast soft diodes, dem cap, LM49710's, holco's, polystyrenes anywhere i can get them in....so it's no lightweight in it's own right.
So I whip out the 7220 and shove this little thing in it's place and the whole experience changes beyond expectations.
At this stage I have not had a drink and the player is running for two hours
or so.
mmm - dilemma.
I switch back to my hardcore 7220 based machine and I'm like...wtf ?
I could be a convert - sorry everyone - maybe I'm going to the dark side soon !
This is in no way meant to be a distraction from your work and experiments but I suggest you keep an open mind and maybe give it a go on one one of your old machines too in the future - you may be surprised at what happens - like me today.
I tried the ' wires ' thing before and never liked NOS but this way is whole lot different.
I've spent a lot of time silencing the 7220 and liked the results but I'm now wondering if I've wasted a lot of time.
My BIG player ' gets it ' soon and I'll let you know how that goes.
Your work is elegant and the new layout to me seems first rate.
All the watchers must be eagerly waiting switch on and your listening impressions.
Hurry up !!
OK confession time - I tried a proper NOS. ( not just the wire trick )
I can't believe I did it.
I have a machine which I trash and just try things - y' know...the one you don't really care about and I added a re clocker module that does the NOS at the same time.
I am listening and looking at the wall where the music comes from and trying to find criticisms and negatives and...there are none.
The player is already tricked out with diy teddy regs everywhere, full cap change, fast soft diodes, dem cap, LM49710's, holco's, polystyrenes anywhere i can get them in....so it's no lightweight in it's own right.
So I whip out the 7220 and shove this little thing in it's place and the whole experience changes beyond expectations.
At this stage I have not had a drink and the player is running for two hours
or so.
mmm - dilemma.
I switch back to my hardcore 7220 based machine and I'm like...wtf ?
I could be a convert - sorry everyone - maybe I'm going to the dark side soon !
This is in no way meant to be a distraction from your work and experiments but I suggest you keep an open mind and maybe give it a go on one one of your old machines too in the future - you may be surprised at what happens - like me today.
I tried the ' wires ' thing before and never liked NOS but this way is whole lot different.
I've spent a lot of time silencing the 7220 and liked the results but I'm now wondering if I've wasted a lot of time.
My BIG player ' gets it ' soon and I'll let you know how that goes.
Thanks Andrew 🙂
I can't wait to hear it either, but unfortunately I have to.
Since I went with BNC connector I have to wait for a BNC-plug to arrive to finish the digital interconnect. RCA at the SB end and BNC at the DAC end.
Not much left to do on the tube output either tbh, but I'll run it with opamps for a while anyhow.
I've sides and front in 7mm oak comming, and later I'll send the front to a friend with a CNC-machine to get the hole for the switch done nicely and he said his machine could also do text. I'm going with MayDac in some nice font.
Also waiting for a proper value primary fuse, 300-500mA slow blow should do it, I've opted for 500mA.
Going to make some really nice silver inteconnects to use between DAC and preamp too. A friend pointed me to an alternative to braiding. Something like Tara Labs Decade but DIY and with WBT silverwire.
About the NOS, I'm actually doing the CD-75dx NOS, but with cut traces/cables. Been looking att the NOS/re-clocking module myself...I think I know the one you used.
Jonas
I can't wait to hear it either, but unfortunately I have to.
Since I went with BNC connector I have to wait for a BNC-plug to arrive to finish the digital interconnect. RCA at the SB end and BNC at the DAC end.
Not much left to do on the tube output either tbh, but I'll run it with opamps for a while anyhow.
I've sides and front in 7mm oak comming, and later I'll send the front to a friend with a CNC-machine to get the hole for the switch done nicely and he said his machine could also do text. I'm going with MayDac in some nice font.
Also waiting for a proper value primary fuse, 300-500mA slow blow should do it, I've opted for 500mA.
Going to make some really nice silver inteconnects to use between DAC and preamp too. A friend pointed me to an alternative to braiding. Something like Tara Labs Decade but DIY and with WBT silverwire.
About the NOS, I'm actually doing the CD-75dx NOS, but with cut traces/cables. Been looking att the NOS/re-clocking module myself...I think I know the one you used.
Jonas
Hi AndrewGM, I side stepped that whole SAA7220 thing and use an old NPC filter and glue logic. Unfortunately it's no longer available so I didn't bother with posting it anywhere. It's night and day with the NPC. Can't say whether NOS is better however it's not hard to beat the 7220. 🙂 Dave
Since I soldered sockets on the board, I have the option of getting the NOS/reclock module later I think. If there isn't already reclocking onboard.
Some more work done...
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