martin clark said:
"Wife reports ... Output is not stable :-( moves between -12. something and -13. something when the input voltage changes between -15V to -25V."
Is this to be expected with a SuperRaygulator, or if not what should I get her to check first?
Ta.
k.
jksmurf said:
Hi, I have not built a Raygulator (yet), but I do know that with LM317 regs, it is best to have a ~500 ohm resistor from output to ground to draw 10mA or regulation is not guaranteed.
I am not positive but this may be a factor?
Lee.
Malefoda said:
I doubt anything legal here is illegal in France. Bear in mind that amp I'm selling was £900 new once upon a time. Your Alpha One was nothing like that much new and it's old, so you can't expect loads for it. Furthermore, I think the DIVA range coming out will have pushed down resale values of all Alpha gear.
Simon
Yeah just look the real stuff; my Arcam paid 450€ and my new chinese baby paid 250€. No way for anyone to look for the first... The only future for it is as a second system, like for my son's bedroom in few years or the TV/DVD set... even if it's dull and lack power, it do sounds good.
An externally hosted image should be here but it was not working when we last tested it.
Malefoda said:
Yeh, great for a 2nd system. That transformer is tiny for an amp! The Chinese amp looks very healthy by comparison!
cant believe the heatsinks on that arcam, my cd67 has more aluminium than that.
BTW are they TO220 for outputs?
BTW are they TO220 for outputs?
marantz 67 mods
Hi guys, i did a clock mod onto the player last night- the problem is that there is a static kind of noise everytime i turn the player on and play . The noise coming from both chanels and last for about 1min then gradually goes away. It sounds like the chopper taking off.
Any suggestions what could cause this? Thanks Quan.
Hi guys, i did a clock mod onto the player last night- the problem is that there is a static kind of noise everytime i turn the player on and play . The noise coming from both chanels and last for about 1min then gradually goes away. It sounds like the chopper taking off.
Any suggestions what could cause this? Thanks Quan.
Luke said:
You may mind that the bacl panel is aluminium, and the top lid also. They are part of the heatsink.
Service manual talk of "n channel mosfets SMF045" and schematics read 2SC2547...
As it's not the right place to talk of it here is the link of mine upgraded a bit (enough !):
http://www.diyaudio.com/forums/showthread.php?s=&threadid=89590
Still looking for more AD8599 feedback... even if find the LM a bit boring and AD a bit exhausting...
OOPs another dead player. Ive done quite a few mods, but the player died when I supplied the separate 5v rails to it.
All mods were done one at a time so that I knew what killed the player, but this was the easy part and now its dead🙁
What happened was the disc spun and didnt find TOC for a while, and then it stopped spinning. Now it doesnt spin at all.
Any ideas what it might be. BTW I was wearing a fleece which creates lots of static, might I have killed a chip?
Thanks
All mods were done one at a time so that I knew what killed the player, but this was the easy part and now its dead🙁
What happened was the disc spun and didnt find TOC for a while, and then it stopped spinning. Now it doesnt spin at all.
Any ideas what it might be. BTW I was wearing a fleece which creates lots of static, might I have killed a chip?
Thanks
Luke said:
Are those 5v regs shorting to each other? Did you remove the appropriate resistors and/or wire links from the board?
Simon
Yeah I did, I took out 3 resistors and a wire link. The reciever has 2 X 5V and the DAC has 2 X 5V, all other regs are as they were. I checked the Servo chips, 3 of them adn they all have 5 V. Apart from that I dont know alot about cd players and what to check. I am allways quite cafreful about powering up when I make changes, and not sure what has happeend.
Ah not sure what Ive done, I replaced u200 rd104 and a cople more from my separate 5V reg conversion, and hey presto it works. Of all these 2 million posts, is there instructions on separate 5V for decoder and dac audio/digital conversion😀
Thomo said:
Hi Lee,
Why ?
Hi guys,
Yesterday I fitted 4 pcs 5V raygulator for digital section (RD01,RD04,R508,R122) and look seem work properly.
I tap 12V from U218 as raw supply to 4 pcs raygulator, so LM7812 as pre regs.
The sound??....I am not yet listening a lot but I have noted that sound more cleaner.
Regards
aquar
Attachments
aquar said:
Hi aquar,
Could I ask for some help?
My wife says "hmm - just finished the first 5V one using 2 green LED's as they said. Voltage is too high about 5.9V!
Can you ask that fellow who did 4 x 5V regs (I can see he used green LED's) which resistor values they used. Also a circuit diagram just for the 5V regs would be nice at least I can make sure that I didn't get the wrong idea what to replace etc.
I think it might be better to use zener 3.9V and at least we know what the voltage drop is exactly."
cheers,
Kristian
Hi Kristian,
I use circuit diagram from Ray (12V raygulator) with replace diode 1N4148 with Red led and replace zener 10V with Green led, I got 5.0xx V, or 1.25 + 2 + 1.75 = 5.
If you use 2 green led youl will get more than 5V, ofcourse. or 1.25+2+2 = 5.25V
Regards
aquar
I use circuit diagram from Ray (12V raygulator) with replace diode 1N4148 with Red led and replace zener 10V with Green led, I got 5.0xx V, or 1.25 + 2 + 1.75 = 5.
If you use 2 green led youl will get more than 5V, ofcourse. or 1.25+2+2 = 5.25V
Regards
aquar