Here is a HK A500 that I went through. Techically I only upgraded caps and replaced the volune control with an Alps. The rest of the time it was all about cleaning and polishing.
Refurbished Harman Kardon A500
- Thread starter Wardsweb
- Start date
Excellent job! A friend of mine recently refurbished an HK Citation II. It was in the most aweful shape before, but the after is just stunning. And the thing sound terrific. I'll bet yours has a very sweet sound as well.
I used to have a version of that amp but I think mine used 6L6 output tubes. It is a nice sounding amp. I think I was 15 or 16 when I owned it. My old man always had a **** stereo, but I had the real deal in my bedroom as a kid.
By the way, great job on cleaning the HK up and installing the new caps. It really looks nice.
By the way, great job on cleaning the HK up and installing the new caps. It really looks nice.
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This was my first piece of high end audio. I had it modded so that there was a tap from the preamp section installed with RCA outputs. Ran the preamp section into a David Hafler DH 220 amp and then into Maggie's. Sounded pretty damn good.
Never figured out the blend function but seemed pretty cool at the time.
Never figured out the blend function but seemed pretty cool at the time.
"Channel A/B Balance" Potentiometer Question
I have a question about the 7355s. I just bought 4 NOS tubes from Brent Jessee and will receive them shortly. I understand that the tubes are cathode bias, which means that I do not have to adjust bias, correct? What is the "Channel A/B Balance" pot for? I have heard some people say that it is bias adjustment, others say that it is harmonic adjustment... I don't know, and I hesitate to mess with it before hearing a second opinion.
I have a question about the 7355s. I just bought 4 NOS tubes from Brent Jessee and will receive them shortly. I understand that the tubes are cathode bias, which means that I do not have to adjust bias, correct? What is the "Channel A/B Balance" pot for? I have heard some people say that it is bias adjustment, others say that it is harmonic adjustment... I don't know, and I hesitate to mess with it before hearing a second opinion.
Great restoration!
Wow! Beautiful work. I was so impressed I bought a tube of Simichrome. I'm amazed at the preservation of the lettering.
I hope you will please consider posting these pictures at the Yahoo Citation Sound group, http://tech.groups.yahoo.com/group/citationsound/
Although it's not technically a Citation I know they would enjoy seeing it. Thanks for posting here.
Happich Simichrome polish
Wow! Beautiful work. I was so impressed I bought a tube of Simichrome. I'm amazed at the preservation of the lettering.
I hope you will please consider posting these pictures at the Yahoo Citation Sound group, http://tech.groups.yahoo.com/group/citationsound/
Although it's not technically a Citation I know they would enjoy seeing it. Thanks for posting here.
I just joined this group because of this HK A500 and the pics.
It is so beautiful all polished up like that.
I just got mine and I think it is really clean.Have not put power to it yet and the capacitors to do a recap have not arrived yet.
Maybe I can resurrect this thread and ask for some help so I do not blow this amp up?
Thanks for showing off this amp and I hope it is still singing for you.
Would love to hear from the original poster.
It is so beautiful all polished up like that.
I just got mine and I think it is really clean.Have not put power to it yet and the capacitors to do a recap have not arrived yet.
Maybe I can resurrect this thread and ask for some help so I do not blow this amp up?
Thanks for showing off this amp and I hope it is still singing for you.
Would love to hear from the original poster.
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