AUDIO RESEARCH D-76A

Thanks Bifwynne, I will give him a call at ARC.

Hi guys, I decided to open up the ARC underneath the transformer and power caps only to found out that there are two 2x 400volts 200uf robycon caps that are added.I assume that the original mallory caps are half dead. this is more problematic than I anticipated. I think I will focus on this one first. do you think it has something to do with the tubes? I took some pictures If you guys are interested I can send some.thanks

I believe this are the original RCA tubes unfortunately most of the white numbers or letters are erased. all I can find are the red letters/numbers that says RCA afc 12ax7/ecc83. how ever I tried other four tungsol 12ax7 with no improvement. I just fund other symtom. Iv'd been running the amp for at least
3 hours when all of a sudden the right channel made a crackling sound. sense
that the right channel volume went down. until now I'm trying to figure it out. the left channel is 80% louder than the right channel. I will appreciate any advice I can get. thank you very much.
Art

I tried turning off the light to see if its lighting up and I also tried touching the tube with my bear hand after two hours of the amp being turned on. I know I'm not suppose do that but I can't stand the fact one of the tube is not working. right now I cant barely hear the right channel so I stop using it. I entent to keep this amp for a long time so I will fix it or have it fix regardless.
I dont know why? may because the first time I use it with my vintage JBL it sounds warm and sweet. before I had that problem. by the way I live in west coast of British Columbia. Vancouver BC. how far are you from BC HIFIGEEK1?

I'm not sure whats the deference between the line fuse in the screen fuse. all I know is that the D-76A has a line fuse. its rated at 6 A 250 V How do we find out weather its the right line fuse? surprisingly it never blew. I will try my third attempt tomorrow to call CALVIN at ARC to ask some of this questions.

I did finally talk to CALVIN today. the reason I cant get hold of him cause I think they are ahead of two hours than us + I can only call him during my break time at work. The fuse is 5 amps 250 volts not 6 amps I dont know if it will make any deference. I do agree both fo you 100% its not about replacing a few caps here and there I'll live this matter to the pro. I am being recommended by someone here in our area I am told he fixis vintage gears. he is currently working on a CLASSIC 60 ARC right now. to me thats a good news...this will save me shipping cost. I will be visit him sometimes this week. Worst come to worst I will send it to ARC or to HIFIGEEK.