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Thread: Deal Of The Day

  1. #1
    Supporting Member Jazz P Bass's Avatar
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    Deal Of The Day

    Hah!

    Selenium rectifiers.
    What a joke.

    *** 2- Marantz Model 7 preamplifier selenium rectifiers ( Filament and B+ ) *** | eBay

    "As you know, the low voltage and high voltage selenium rectifiers are essential to keeping the classic sound of the Marantz Model 7 preamplifier. No silicon rectifier can come close to the selenium rectifier in conveying the true timbre of music."
    Chuck H and The Dude like this.

  2. #2
    Old Timer Leo_Gnardo's Avatar
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    Quote Originally Posted by Jazz P Bass View Post
    "As you know, the low voltage and high voltage selenium rectifiers are essential to keeping the classic sound of the Marantz Model 7 preamplifier. No silicon rectifier can come close to the selenium rectifier in conveying the true timbre of music."
    I dunno about "true timbre" does that mean the peculiarly noxious odor selenium rectifiers make as they let their special smoke out when they inevitably fail?

    Bet you half a peach these were removed from someone's Marantz, and replaced as suggested in Audio Amateur over 35 years ago, with series resistors to make up for the selenium voltage drop. Heck, that's when I converted mine to silicon. Noticed absolutely no change in "timbre" or anything else. Maybe I'm a cloth-eared idiot. What I DID notice was an enormous improvement from wooly tone to estimable hi fi when the insterstage caps were changed from disc to film in the second to last stage.

    $169, good for him, someone will pay it. I kept my old parts, maybe should borrow this guy's ad copy & flog 'em on the 'bay. Unless of course someone here wants 'em, I'll let 'em go for half that price. Convey that true timbre, it's important!

  3. #3
    Supporting Member mozz's Avatar
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    I sent a question.
    Are these tested? Do you have the leakage measurements and the forward voltage drop? Also the reverse recovery time if you are able to measure that parameter.
    g1 likes this.

  4. #4
    Senior Member Enzo's Avatar
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    Even good seleniums are pretty leaky by their nature.
    Education is what you're left with after you have forgotten what you have learned.

  5. #5
    Supporting Member Chuck H's Avatar
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    Don't those things fail from age like e caps? The internal resistance increases until they can't handle the current.?. I thought age (regardless of use) was a real problem with selenium rectifiers.
    "I've heard magic defined as "a technology you don't understand". By that aphorism, the folks in this forum are practicing wizards, able to summon AND control the lightning demon, and make charms to allow others to use the demon in certain ways." R.G.

    "...less ear-friendly but handy for jazz." Leo_Gnardo

  6. #6
    Senior Member Enzo's Avatar
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    They don't age well, they weren't the best even when new.
    Education is what you're left with after you have forgotten what you have learned.

  7. #7
    Supporting Member The Dude's Avatar
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    Yes,...... and for $189 you should get a free set of bias ply tires.
    Justin Thomas and g1 like this.
    “Yeah, well, you know, that’s just, like, your opinion, man.”

  8. #8
    Supporting Member mozz's Avatar
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    Wow, he answered.

    "All tested, a.few hundred sold with 100% positive feedback results. If your application is for a Marantz model 7 you can do the buy it now purchase with confidence. Best regards, Louis'

    If you look at completed auctions, he has sold some. I doubt hundreds. Wow, i'm in the wrong business again.

  9. #9
    Supporting Member Chuck H's Avatar
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    I have a lot of "vintage" $h!t I can sell!!! How about some original LCR 50/50 caps? Barely used and look like the day they were made in perhaps 1978! I wonder how much I could get for an old Magnavox remote? What about empty vintage Coca Cola bottles? This could work out
    The Dude likes this.
    "I've heard magic defined as "a technology you don't understand". By that aphorism, the folks in this forum are practicing wizards, able to summon AND control the lightning demon, and make charms to allow others to use the demon in certain ways." R.G.

    "...less ear-friendly but handy for jazz." Leo_Gnardo

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