13 responses Add your response
Thanks for the advices from Shadorne and mgreen27. Any thoughts as to why using Radio Shack surge protector to connect amp power cord reduces the problem significantly? If I listen to music only for one hour, then no problem is detected.
What would be an estimated cost to replace capacitors of the Lectron tube amp?
In reference to kalali, the answer is yes. When I have turntable and preamp on and play music, no woofer vibration initially until about 60min.
Thanks czarivy. A follow up question to seek advice from Audiogon members: since my Lectron HJ50 tube amp is over 25 years old, assuming it has been used 5 h a week for all these years， what other problems would I expect with continue use if I repair what is needed now? Would you advice me to buy another equivalent/ or better and newer amp? If so what would be a suitable commendation for my system (focus audio model 78 speaker,Transcendent
That is by reputation a very good amp you own, to some a classic. I suggest keeping it taking it to a tech getting it looked over and as others have said recapped. You may find its like getting a whole new amp in terms of improved sound quality. To me that makes much more sense than ditching a very good older amp for a new one. Good luck!
I'm a firm believer in fixing well built quality gear if happy with it. I have done this several times. Most recently with a Melos 222 preamp, and currently going through the same process with a single ended amp that I've owned for a number of years. The beauty of it is that you can upgrade capacitor, resistors, wire, switches, potentiometers, etc. (in the process), to bring it to a new level of performance. It can cost a fair amount of money, but usually much less than replacing with like equipment. No regrets.
Thanks for sharing opinions to fix my amp.
I did one more experiment. I switched the speaker leads to 4 ohm terminal connection on my amp.( previous early onst of vibration is with 8 ohm connection) now The vibration did not occur until about 2 h later and was just initially 4 vibrations, followed by consecutive vibrations at 2h 40 minutes.
Does this mean circuit board of 8 ohm is not as good as 4 ohm? Any opinion from amp experts?