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The original box looked a little off to me.. Its markings were for a D-500 not a Dual 500 and the magic marker serial number looked too new. It looked like some body just recently wrote the serial number on it. While the rest of the box graphics were well worn.. It all seemed kinda off to me...

Dang,, somebody wanted a Dual-500 and box, real bad..

Payment sent - Thanks for the hard work...

Late as usual..If you have any extras. I'll take 2. large...Black if possible.

The amp/board in FredR's picture.. Did that come out of a clean room or something? Never seen one that clean.

Thanks OldPhaser for splaining the details for replacing the caps (such as the 100uf/6.3V ) and and what it does for the lower frequency response of the amp. Of course i am applying this to the D and Dual 500's, so the numbers are a little different. Learn something new everyday.

Moer, have you ever rebuilt the PL D-500 or the Dual 500? I would like to see your ideas on modifications, if you have upgraded one of these.

Sorry to cut in, but once I saw the pictures of the dual mode LED display, I just had to comment, I also like the bar-mode display setup. Makes me want to try it on my D-500. I wonder if it's possible to modify the current D-500's setup similar to the 700 boards from Joe. ?? I guess anything...

No problemo, it was in such good shape it would be a shame for me to just buy it and gut it for parts. Actually I wanted one of you guys, who restores the 700's to get it. It did seem like a good price. But, please keep me in mind if you have a spare back plate. Also what do the black back...

Ah-ha that is good news. Now I will have to get looking. There is a 700 series on Ebay now for 250.00 , parts or repair. If I were to buy that amp, I would most likely try to fix it and not actually use it for parts. So the best I could do is just keep looking.

You guys make me laugh.. Be cool and thanks for the excellent ideas. As it turns out I do have a new face plate for this D-500. But the problem is that plate or sheet metal behind the main face-plate has the pitting issue. Just for laughs I mixed some paint (about 4 colors to get the exact...

Nothings ever easy, is it? Have to stop and shop at some of the silkscreen shops in town tomorrow. I was thinking about laser etching also. Most likely more expensive. To bad I'm retired, we had all these shops out there on the base.

Not sure of the color. At first it resembles a a light bronze. SAF has some good color guides but I doubt they will be any help for hobby work. Color sample link. SAF Color samples

Hi All, hope everyone is doing well.. I am back at tearing down another D-500, after making a few changes and listening to it for a while, the sound seems about right. Now I am now concentrating on the looks of the amp. My first issue, is what to do about the meter face-plate corrosion, from...

Thanks for the parts info, Lee is setting me with the TIS97's, and I also ordered 2 of the UAA 170 from the Ebay seller in Bulgaria. I am almost ready to open D-500 back up and change a few things. Thanks, Carl

Will do,,I will be pulling it apart next week once I get back in town and attempt to see whats up. Carl

It may be just an alignment issue and not the LED or the drivers at all. The more I look at it, the more it looks as if the number plate is shifted to the left. One of the reasons I was looking for an updated schematic is this amp will turn-on normally, but once it has warmed up for 10 min or...

No all my LED drivers are still working. But,, I am being a little picky here. On my Dual 500 the left meter when the volume is turned all or most of the the way down, the far leftmost LED is not moving or lighting as far left as it should. I believe it is the 3rd LED that is lighting up when...

Wanted to revive an old thread, hope you guys OK with it. Thanks THD+N for the updated Schematics for the D500. Appreciate the hard work. But I have to ask, since I wanted to work on my LED meters over the next few weeks. Did you ever finish your updated rendition of the LED meter control...

20 each, if you have that many to spare, that should last me a small lifetime.