rasping sound from Dared VP-16

strawberry · 28th December 2011, 12:56 AM

Hi all. I created a user name so I could ask a question.

I had a solid state amp running and wanted to listen to one of the speakers hooked up to this tube amp. 2x6sl7 and 4x6v6. But I disconnected the cabling at the speaker and fed the signal into the output of the turned-off tube amp. Now that channel of the tube amp is damaged, sounds raspy. I looked at the components and none looks burnt. I replaced the yellow thin signal-in capacitors, but no difference. Could it be a burnt diode? I replaced all tubes and the sound is the same raspy on the one channel I had hooked up to the solid state output.

I don't have a volt meter at this point but will go buy one soon. It's the right side of the amp as seen in the picture that is bad. The only component not seen is a square plastic thing on the other side, maybe a AC to DC converter.

Any suggestions are welcome.

Alastair E · 28th December 2011, 01:21 AM

Probably killed an output transformer....

Inputting power to the output transformer can produce dangerous voltages that cause the Tx to go shorted turns...

strawberry · 28th December 2011, 01:40 AM

Sounds right. Oh, well.

strawberry · 1st January 2012, 08:05 PM

Update. I tried a new set of power tubes on both channels and now the amp sounds good again. Not sure how I screwed up the testing the first time around. This amp is a good choice but it needs to have the volume control and the selector control switched out for better parts. They will begin to crackle after a few years.

28th December 2011, 01:21 AM	#2
Alastair E diyAudio Member Join Date: Feb 2004 Location: South Wales	Probably killed an output transformer.... Inputting power to the output transformer can produce dangerous voltages that cause the Tx to go shorted turns... __________________ Das Beste Oder Nichts

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
FS: Sound Practices mags 1-7 and 9-16	makingmoney	Swap Meet	1	7th June 2011 03:04 PM
Dared mp30	ziocalepino	Tubes / Valves	2	28th November 2010 01:18 PM
FS: Fostex HP-16 Sound Reflectors	Mattdubyou	Swap Meet	1	27th May 2010 01:18 AM
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


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

28th December 2011, 01:40 AM	#3
strawberry diyAudio Member Join Date: Dec 2011	Sounds right. Oh, well.

1st January 2012, 08:05 PM	#4
strawberry diyAudio Member Join Date: Dec 2011	Update. I tried a new set of power tubes on both channels and now the amp sounds good again. Not sure how I screwed up the testing the first time around. This amp is a good choice but it needs to have the volume control and the selector control switched out for better parts. They will begin to crackle after a few years.