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Hi Doug - My beloved Harmon Kardon HD990 recently started to act up. After ~10 mins of playback on any CD, the volume slowly fluctuates up/down, almost as if the DJ is fading out midway through a track then changes his mind and brings volume back up. I've swapped out amps and speakers and there's no doubt that it's the player. Any suggestions? Thanks, Drew
Hello Doug. I am Dave. Having a problem for 2nd day today trying to reply to a post re my Yamaha M80 repair. When I try to send a reply I get an orange crawler at the top of the screen, followed by an announcement that there is a server problem. Can you tell me what needs to be one to correct this issue? Thanks, dcHi Doug, Last night, I posted about a broken Carver M400 socket. I had two short paragraphs and a picture. I left the post up for about one hour and many looked at the post but did not give input. I figured I did something wrong so I pulled the post. Do you know what the forum is for a Carver Repair? I am a long member but I am timid to post until I understand how to use AK in the proper manner. Thanks!
Haha just seen you mentioned in a h/k review on you tube about your wealth of h/k knowledge....Nice!
Hi, can you please scramble my username and delete my posts if possible? Thank youDoug:
I am cleaning up my internet accounts and would like to remove my profile here. I may return, but I"m trying to reduce my internet presence. Do you have the authority to terminate my account as "Muser?" If so, please terminate it, you can verify this request by sending an email to audiolarry@yahoo.com. If you don't can you point me to someone who can?
In advance,
Thanks!
Larry CoxGood morning. I've got 4 of the New Large Advent from 1979 and am going to replace the woofer foam rings on all and get the crossovers replaced on them too. How do I remove the crossover panel from the speaker? I'm surmising they're attached to the tweeter switch on the rear of the speaker. Thanks for any help...
Online transistor replacement guide.
https://archive.org/download/transistorcrossreferenceguide
18$ ebay auction for the "Master reference" is the gold standard for transistor replacement.
The master Semiconductor Replacement Handbook tab editorial staff
Could not email URL ... too long.
Buck
Hi Doug, looking for someone to recap/repair an HK825. If not you, can you point me to someone? I'm out west so will likely ship it.
Thanks!
Finished up the HK AP2500 and it sounds great. No tone controls, no balance... just perfect.
Something wrong with the VTA SP6, so backto the modded Carver C-1. That means I can switch over to the retipped DL-301mkII... glorious.
Restored another HK 730, demoing an upgraded Shure M95, repairing two Onkyo CP-1046F, and restoring a HK AP2500 preamp (should be awesome).
Fixin' up a couple of Onkyo direct drive turntables... cuz' you can never have enough turntables...
Hi, I found your thread (Recapping, Rebuilding, Restoring, Rest-o-modding... a Pioneer SX-450 receiver). I have a question about the BOM you included in post #30. In post #32 you give a list of all the transistors you replaced. But in the BOM you only mention 2 x 4 transistors. Should I also replace the others you mentioned in #32?
Hey! Just wanted to say thanks for all the Harman/Kardon x30x information you've put out, for all of us to see. I'm a novice when it comes to tinkering with electronics. But already I can see that you've done a great service for enthusiasts like me, compiling all this stuff together.
Just want to say how much I appreciate your patience and willingness to help non-technical members like myself. Your explanations are easy to understand and VERY helpful. I've read your Sansui 7000 restore thread and have some questions. Not sure if it's possible/preferable to ask my questions on that old thread (2018?) so other's might benefit from answers, or if I should PM you instead.
Refinishing the cabinets and recapping the interiors of a pair of Infinity Qe -
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