Paradise Builders

[pdul]

Unfortunatly i am still waiting for the smd components, i guess i should have followed my own advice

 

[brianco]

.......good; I'm not getting old after all! Thanks for that pdul.

 

[Benedetto]

For certain reasons its not a thread to wait another month.
First ive got a quite sufficient phonostage,
second im still looking for a matching MC cart,
and last but not least, the prereg is hunting me in my Dreams.

 

[pdul]

To be honest, i think that a lot of the talk about the prereg, can be compared with wheather the color of your champagneglass matches the interior of your Rolls Royse.
I doubt my old ears can hear the result of all that effort.

 

[Benedetto]

Daccord,
but,
still...

 

[Bksabath]

Why one wuld use a colored glass escapes me
But then being a roller one understand. loads of money no class...

Now if it was old gulietta or dino one wuld newer use colored glass or glass at all for that...

 

[hesener]

The reading on the output is jumping arround like someone who has been sitting in an ants nest But the input and powersupply readings are steady like a brick wall.

Did notice some of that behaviour myself, but it went away after a day or so. But then, remember I had wild oscillation problems with rev1 so that might have masked this. with rev2 (which is essentially rev 3, what you are building, no such issues.

I think it might be the elcaps in the input that are still forming. you may want to leave it running overnight and check the next day. alternatively, you could take the caps out and connect them to a 9V battery overnight, all in parallel... thats cheating a little bit....

pdul, do you have an oscilloscope? can you check the output waveform? the DMM might not tell you the true story. you could also put a 1nF cap in series with 100kOhm at the output (RC highpass) and measure the voltage across that resistor. If the DMM does not show zero, it might be oscillations....

 

[pdul]

alternatively, you could take the caps out and connect them to a 9V battery overnight, all in parallel... thats cheating a little bit....

This could give some nicey explosions, since the input caps are 6800/6,3v, but i know what you mean

alternatively, you could take the caps out and connect them to a 9V battery overnight, all in parallel... thats cheating a little bit....

I dont have a scope, but i will try the cap/resistor approach
Thanks.

 

[pdul]

Sorry! It seems i f..... up with the quoting

 

[pdul]

I measure ca. 10mv over the 100k resistor, so oscillation it is

 

[pdul]

I am still waiting for the smd capacitors to arrive, maybe they will solve the problem.

 

[hesener]

oops, sorry for the wrong voltage...

you may need an oscilloscope... this is strange, its the first time somebody reports oscillations with the updated design...

 

[pdul]

I cant find the 1uf smd capacitors in the schematic. Is that a mistake, or is it just my old eyes?

 

[pdul]

you may need an oscilloscope... this is strange, its the first time somebody reports oscillations with the updated design...

Well theres a first for everything I would be a very happy man if someone here can sell me 20 of those smd caps, otherwise i have to wait for weeks to recieve those i have ordered from Hong Kong

 

[Benedetto]

I will order this week.
So they should been delivered next week.
If youre interested, send me PM.
http://www.reichelt.de/Wima-FKS2-FKC2-FKP2/SMD-2824N-1-0-/3//index.html?ACTION=3&GROUPID=3151&ARTICLE=31428&SHOW

 

[hesener]

I cant find the 1uf smd capacitors in the schematic. Is that a mistake, or is it just my old eyes?

Hi, they are not in the schematic, just in the layout... sorry for that... they were added as an afterthought of some sort.... 100nF should do just as well, by the way

 

[pdul]

Hi, they are not in the schematic, just in the layout... sorry for that... they were added as an afterthought of some sort.... 100nF should do just as well, by the way

They can turn out to be very important components, at least for me.

 

[Benedetto]

100nF would cut the price in half
SMD-2824N 100N - Wima-SMD-Kondensator, Bauform 2824N, 100nF bei reichelt elektronik

 

[pdul]

Thats fine with me, no complaints at all

 

[pdul]

I am not usually shopping at Reichelt, they charge 17 euro for shipping to Denmark