Re: Re: Re: Re: Re: Coax mod on cd67se
The same here (when my last mod is undone 🙂).
Last night I reconnected my Sony ES which I had in high esteem for years. My second (cheaply modded) 63 beats it at most points. Still prefer the mid bass of the Sony.
The (fully modded) 63 beats the Sony by miles now although lows are not as impressive as the Marantz CD80 (in my case that is).
gy21 said:She sounds great, i'm very happy with it now. I bought her to replace my unmodded philips 963sa for copy control cd's. Stock the philips sounded a tiny bit better. But now the cd67se beats the 963sa easily. If she she's competely done i will compare her to my dad's (1500 euro) musical fidelity a3.2 cd player.
so far the cd67se cost me 65 euro to buy it and 65 euro to mod it
The same here (when my last mod is undone 🙂).
Last night I reconnected my Sony ES which I had in high esteem for years. My second (cheaply modded) 63 beats it at most points. Still prefer the mid bass of the Sony.
The (fully modded) 63 beats the Sony by miles now although lows are not as impressive as the Marantz CD80 (in my case that is).
disco said:
Got it!
I reversed some of the BG NX caps. These are unipolar electrolytes but need to setlle when revered. Phew.
Jaap
start earth is used with a 3 pin cord
being active neutral earth
use earth as star ground reference.
allan
start earth is used with a 3 pin cord
being active neutral earth
use earth as star ground reference.
allan
martin clark said:
to revere = feel great respect for.
Well, how later the evening . . . to more humorous my mistakes get 😀
awpagan said:
Then I have a problem Allan. None of my hifi gear uses mains earth, not even my tubeamps. In fact, it's not present in the room.
Tried it several years ago but the amp picked up more rubbish with earth than without. Will give it another try tomorrow.
Is there still a point in maintaining the through-print-connections after making a central ground?
Regards, Jaap
disco said:
Just a suggestion, but maybe your house/mains earth needs attention.
By the way, I've seen pics of the boards you made for discrete output - very nice!
Simon
SimontY said:Just a suggestion, but maybe your house/mains earth needs attention.
By the way, I've seen pics of the boards you made for discrete output - very nice!
Simon
Hi Simon,
There must exist some sort of ground testing equipment. Shall ask the mates for it...
Thanks, they don't only look good but Ray did a excellent job on the circuit. Curious to hear a review.
Regards, Jaap
disco said:
Then your earth must be via the transformer to neutral.
Neutral may be connected to earth on the switchboard
Earth may be connected to the copper water pipe going to ground
or better ground stake.
Please check with the electrical standards for your country.
above is the standard for aus
"maintaining the through-print-connections after making a central ground"
Marantz used the top plane as central ground, Large area might help dissapate current pulses.
Still has to find ground somewhere!
allan
rowemeister said:
Mega-ohm meter
Most electricians should have one.
or at least "your local electrical company" electricians.
they are used for testing earths on street corner substations and
for zapping cockroaches😀
allan
awpagan said:
The insulation tester (megger (brand name)) is used for testing the insulation breakdown of the cables. And the continuity is for testing the R1+R2 ring. Both on live and neutral.
The earth loop tester is for testing the ohms of the earth loop (L to E and N to E) and will also show wiring condition via indicator lights.
The loop tester checks the earth loop from your house to the substation.
Both units are needed to do a thorough test
P.S A 1000V DC zap from an insulation tester is a regular occurance for me
Brent
hi guys
time for dump question
has the SM dac for these got a variable output?
eg volume control from the remote
if so
what is the remote's control ID so i can use my programable remote.
allan
ps headphones driven straight off rca's not bad but need to turn down volume
may reconfig buffer for lower impedance 250 Ohm's 😀
time for dump question
has the SM dac for these got a variable output?
eg volume control from the remote
if so
what is the remote's control ID so i can use my programable remote.
allan
ps headphones driven straight off rca's not bad but need to turn down volume
may reconfig buffer for lower impedance 250 Ohm's 😀
rowemeister said:
An externally hosted image should be here but it was not working when we last tested it.
Hi Brent,
It took a while for the electrolytic caps to kick in, but for this purpose serves the repeat function best 😀 This morning details were back for the most part.
Thinking over the principle of a central ground I came to understand that it provides an unipotential reference. So I did a little coloring job on the layout and cut away all ground coupling jumpers but U137 (the one connecting to the upper plane). Run seperate wires to all ICs and beafed up two in the PSU to 2mm solid silver.
Well, I fired her up an hour ago and hurt my chin on the floor. Deep solid lows (organ on Donald Fagan - Ruby Baby), superb defined details (Musica Gregoriana) and a vast gain in dynamics.
Still have to connect to a mains ground [ . . . ].
Thank you Allan for bringin up this brilliant idea!
Jaap
disco said:
Fantastic Jaap! I wondered about your lack of good sound as I heard good gains using strands of Kimber 4VS from each chip, 12v, 5v and other bits.
Simon
SimontY said:
Hi Simon,
What helps too when one descides to cut unconnected parts of the ground: keep the connection to the RCAs as this is the only connection to the case via the backpanel. 😡
Regards, Jaap
Hi Everyone
So I took apart the CDM12 cleaned everything all the old grease the gears ect.
Well it still doesn’t work
Will a CDM 12.4 work as a replacement? I know where to get one of them.
Regards
Dave
So I took apart the CDM12 cleaned everything all the old grease the gears ect.
Well it still doesn’t work
Will a CDM 12.4 work as a replacement? I know where to get one of them. Regards
Dave
disco said:
Yeh, I have my new RCAs connected to the ground point on the pcb just under where they sit. This point has its own star connection.
Simon