Help with dared MP-15, please!

reyrios · 17th November 2007, 05:35 PM

Hi, this is an integrated amp from Dared that was working perfect until a couple of days ago when the left channel suddenly died, there is no hum, no distortion, nothing, I can´t see anything burned or loose, all I can tell you is that the KT88 in the faulty channel barely gets warm, the other KT88 gets very very hot, or course I tried changing tubes, but it seems that the KT88 is not getting enough current to heat the filament or something similar, what is a safe way to measure this? thanks guys! ah the other tubes are 12AU7, 12AX7 and the one in the middle is a 6HU6.

Salas · 17th November 2007, 05:47 PM

Get a multimeter, set it for AC and see what it reads between pins 2&7. Who put Auricaps and the red electrolytes (Cerafines? BGs?) in there?

reyrios · 18th November 2007, 07:16 AM

the auricaps and cerafines are stock, not bad for a Chinese amp, right, I will take the measure tomorrow, thanks, what would be a normal reading?

Salas · 18th November 2007, 09:07 AM

5.7 - 6.9 VAC. 6.3 VAC nominal.

17th November 2007, 05:35 PM	#1
reyrios diyAudio Member Join Date: Oct 2006	Help with dared MP-15, please! Hi, this is an integrated amp from Dared that was working perfect until a couple of days ago when the left channel suddenly died, there is no hum, no distortion, nothing, I can´t see anything burned or loose, all I can tell you is that the KT88 in the faulty channel barely gets warm, the other KT88 gets very very hot, or course I tried changing tubes, but it seems that the KT88 is not getting enough current to heat the filament or something similar, what is a safe way to measure this? thanks guys! ah the other tubes are 12AU7, 12AX7 and the one in the middle is a 6HU6.

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Help for correct grounding a Dared VP-845	andreas w.	Tubes / Valves	2	7th June 2008 07:25 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

17th November 2007, 05:47 PM	#2
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	Get a multimeter, set it for AC and see what it reads between pins 2&7. Who put Auricaps and the red electrolytes (Cerafines? BGs?) in there?

18th November 2007, 07:16 AM	#3
reyrios diyAudio Member Join Date: Oct 2006	the auricaps and cerafines are stock, not bad for a Chinese amp, right, I will take the measure tomorrow, thanks, what would be a normal reading?

18th November 2007, 09:07 AM	#4
Salas diyAudio Chief Moderator Join Date: Oct 2002 Location: Athens-Greece	5.7 - 6.9 VAC. 6.3 VAC nominal.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)