Aleph 5 problem,or....

tonistefanovski · 22nd February 2006, 09:29 AM

Dear All,
As I posted, last week, I have finished two monoblocks of Aleph 5. They are working OK except that I’m hearing some noise (probably bad ground). Yesterday while playing some music I’ve noticed that bas drivers (on one loudspeaker - Mission 753) are “dead”. Could somebody tell me is it possible that I have some problem with amplifier???
One questions more. I’m using standard electrolytic capacitors (those of 220uF-YAGEO). I have bypassed them with 0.470nF/400V WIMA-MKP capacitors, and I need to know is this OK???
Thank you at advance,
Toni

Zen Mod · 22nd February 2006, 09:40 AM

Quote:

Originally posted by tonistefanovski
Dear All,
As I posted, last week, I have finished two monoblocks of Aleph 5. They are working OK except that I’m hearing some noise (probably bad ground). Yesterday while playing some music I’ve noticed that bas drivers (on one loudspeaker - Mission 753) are “dead”. Could somebody tell me is it possible that I have some problem with amplifier???
One questions more. I’m using standard electrolytic capacitors (those of 220uF-YAGEO). I have bypassed them with 0.470nF/400V WIMA-MKP capacitors, and I need to know is this OK???
Thank you at advance,
Toni

first-measure have you DC on out of that (suspicious) channel of Aleph;
if not-that's just coincidence;
are bass spks in that Mission box in series? if they are,if just one loose conductivity of flex wire from basket terminal to cone-both are silent
if they are in parallel , check them both.....

anyway-measure Aleph first......

regarding caps-they can have only sound related influence

tonistefanovski · 22nd February 2006, 09:44 AM

Choky thank you for your replay. I have messured voltage at the output terminals. They are Ok (one chanel 8-10mV and the other one 18-25mV)

Zen Mod · 22nd February 2006, 09:54 AM

now-take scrdrvr and pull that woofs out.......

tip for test:
connect 1V5 battery to speaker terminal
gently (one by one) push cone of bass (you can use cup as a "pusher" )
likely-if just flexy wire is out,in one moment you'll have sort of contact and spk will work for moment.....

tonistefanovski · 22nd February 2006, 09:58 AM

Yes Choky, I've did that.
Thank you,
Toni

Zen Mod · 22nd February 2006, 09:59 AM

Quote:

Originally posted by tonistefanovski
Yes Choky, I've did that.
Thank you,
Toni

you posted during my editing...
reread

tonistefanovski · 22nd February 2006, 10:12 AM

Yesterday, when I've noticed the problem I've removed the speakers out. I didn't make a test with 1V5 battery, but I've pushed the cones gently and noticed that they are not working good, there is some noise (like grrr...grrrr), so I'm preaty sure that they are "dead". I will fix them, that is not a problem, I was thinking that I have some problems with an amplifier.
thank's

22nd February 2006, 09:29 AM	#1
tonistefanovski diyAudio Member Join Date: Jun 2005 Location: Skopje,Macedonia	Aleph 5 problem,or.... Dear All, As I posted, last week, I have finished two monoblocks of Aleph 5. They are working OK except that I’m hearing some noise (probably bad ground). Yesterday while playing some music I’ve noticed that bas drivers (on one loudspeaker - Mission 753) are “dead”. Could somebody tell me is it possible that I have some problem with amplifier??? One questions more. I’m using standard electrolytic capacitors (those of 220uF-YAGEO). I have bypassed them with 0.470nF/400V WIMA-MKP capacitors, and I need to know is this OK??? Thank you at advance, Toni

22nd February 2006, 09:54 AM	#4
Zen Mod diyAudio Member Join Date: Jan 2003 Location: ancient Batsch , behind Iron Curtain	now-take scrdrvr and pull that woofs out....... tip for test: connect 1V5 battery to speaker terminal gently (one by one) push cone of bass (you can use cup as a "pusher" ) likely-if just flexy wire is out,in one moment you'll have sort of contact and spk will work for moment..... __________________ my Papa is smarter than your Nelson ! tnx to clean thread ; Cook Book ; PSM LS Cook Book ; Baby Diyaudio FORUM ; BAF Forum & Gallery;I'm dumb

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22nd February 2006, 09:44 AM	#3
tonistefanovski diyAudio Member Join Date: Jun 2005 Location: Skopje,Macedonia	Choky thank you for your replay. I have messured voltage at the output terminals. They are Ok (one chanel 8-10mV and the other one 18-25mV)

22nd February 2006, 09:58 AM	#5
tonistefanovski diyAudio Member Join Date: Jun 2005 Location: Skopje,Macedonia	Yes Choky, I've did that. Thank you, Toni

22nd February 2006, 10:12 AM	#7
tonistefanovski diyAudio Member Join Date: Jun 2005 Location: Skopje,Macedonia	Yesterday, when I've noticed the problem I've removed the speakers out. I didn't make a test with 1V5 battery, but I've pushed the cones gently and noticed that they are not working good, there is some noise (like grrr...grrrr), so I'm preaty sure that they are "dead". I will fix them, that is not a problem, I was thinking that I have some problems with an amplifier. thank's

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