SimontY said:
Read this, Simon, it explains a lot !! .. and why cd has a bad name !!
http://www.mindspring.com/~mrichter/dynamics/dynamics.htm
Andy
Hi Guys,
Further tweaks this afternoon - still with the E88CC.
( Thanks to the Headwize site )
Voltage drop across the anode resistor was very high so I changed it from 12K to 5.6k.
Voltages are now more respectable.
B+ is 24v
Anode at 17.5v
Cathode at 2.2v
Grid at 1.7v
So, I am now going to try the small tubes
And it still sounds great !!!!!! which is what it's about.
Ray, give it a try - I think you will be surprised.
Andy
Further tweaks this afternoon - still with the E88CC.
( Thanks to the Headwize site )
Voltage drop across the anode resistor was very high so I changed it from 12K to 5.6k.
Voltages are now more respectable.
B+ is 24v
Anode at 17.5v
Cathode at 2.2v
Grid at 1.7v
So, I am now going to try the small tubes
And it still sounds great !!!!!! which is what it's about.
Ray, give it a try - I think you will be surprised.
Andy
poynton
I made the CC-CCS-X-BOSOZ preamp and it is very good
http://www.diyaudio.com/forums/showthread.php?s=&threadid=50267
tube, discrete ss opamp
you already tried opamps
now tube or discrete ss?
My idea is try it and see(hear) which on You like.
Each person may prefer something different.
ps i do like the tube headphone amp
A record?
http://www.diyaudio.com/forums/showthread.php?s=&threadid=31077&perpage=10&pagenumber=1
post 665
but still very impressive
allan
I made the CC-CCS-X-BOSOZ preamp and it is very good
http://www.diyaudio.com/forums/showthread.php?s=&threadid=50267
tube, discrete ss opamp
you already tried opamps
now tube or discrete ss?
My idea is try it and see(hear) which on You like.
Each person may prefer something different.
ps i do like the tube headphone amp
A record?
http://www.diyaudio.com/forums/showthread.php?s=&threadid=31077&perpage=10&pagenumber=1
post 665
but still very impressive
allan
poynton said:
Hi Andy,
I'm planning to build the passive filter part on the CD67 PCB tomorrow. Then I will hook-up my tube proto and see what it does at lower voltage. I also want to modify the HDAM circuit and see what that does. Then I can compare the SS against the tube buffer
.I think i'm going to stick with noval tubes, which i'm going to hard-wire, so my need for a PCB is not that big. Unless you make one for the pencil-tubes. Will it come with the tubes?
Cheers,
Ray.
Hi all.
I have done a mod which many of you will just laugh at
And its no where near has complex as the tube mod, but I am keeping an open mind.
The LED mod
I will test this fully to see if there is any difference.
I have done a mod which many of you will just laugh at
And its no where near has complex as the tube mod, but I am keeping an open mind.
The LED mod
I will test this fully to see if there is any difference.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
rowemeister said:Hi all.
I have done a mod which many of you will just laugh at
And its no where near has complex as the tube mod, but I am keeping an open mind.
The LED mod
I will test this fully to see if there is any difference.
An externally hosted image should be here but it was not working when we last tested it.
You've used the wrong shade of blue - should be more of a greeny shade!
perhaps they should alternate blue/green. Try 3 not 2 for better cover. They should also be arranged to rotate counterclockwise in sync with the motor.
Let us know the results.
Andy
My tube amp will have a bright orange led under each tube for maximum effect. ( if you gotta glow, you gotta glow! )
Let us know the results.
Andy
My tube amp will have a bright orange led under each tube for maximum effect. ( if you gotta glow, you gotta glow! )
SimontY
?? if the blue leds can be detected in a blind test?
ray
"Allan, no luck with the scanner yet, will try again tomorrow. Some nasty XP driver problem with my parallel port scanner."
no problem and thank you for your help.
I'm collecting ideas,info and parts at present
Tent clock on order
May build the ALW super reg's, for decoder & dac
passive, fet or tube filter/out? undecided
probably try each and keep the one i like.
Only found one problem to evaluate with the cd850
cd67 run 16.*M clock cd850 11.*M
external dac clock would be a nightmare
ps
rowemeister
arn't led's noisey?
allan
does look good though
?? if the blue leds can be detected in a blind test?
ray
"Allan, no luck with the scanner yet, will try again tomorrow. Some nasty XP driver problem with my parallel port scanner."
no problem and thank you for your help.
I'm collecting ideas,info and parts at present
Tent clock on order
May build the ALW super reg's, for decoder & dac
passive, fet or tube filter/out? undecided
probably try each and keep the one i like.
Only found one problem to evaluate with the cd850
cd67 run 16.*M clock cd850 11.*M
external dac clock would be a nightmare
ps
rowemeister
arn't led's noisey?
allan
does look good though