Who Can Tell Us Which "World Reference" Preamps Used Selenium Rectifiers ?

Posted by Interstage Tranny (A) on January 21, 2017 at 16:05:04

In Reply to: RE: Selenium Rectifier Lowdown posted by Uncle Mike on January 20, 2017 at 08:23:08:

And, Half-Wave Rectified to boot ? Yes, I am talking genuine, stateside made stereo preamps. The kind anyone of us would be proud to own. I am thinking of two units which begin with sequential letters...

Wasn't that a good hint ? Yes, I will spare you the brain power...

Lafayette KT600/KT600A and Marantz Seven(7C) originally come with Half-Wave Selenium Rectified Power Supplies. That means only one, small stack disc for the High Voltage supply.

If you replaced these with silicon diodes and adjust voltages with a resistor, you might have preferred the sound with the selenium rectifier.

I am not condoning either method. I am simply posting this here, so all can consider the facts. Surely, conversion to silicon or modern bridge diodes might be beneficial electronically. Soundwise, what if you actually prefer the half-wave selenium with more capacitance added to the power supply cap banks ?

If you were restoring a Marantz 7C, you might prefer to "bypass" the selenium, but leave the selenium in place for that vintage look the buying collector wants to see...You all have seen the prices of the 7C rising rather sharply through the years, right ? There must be something about the sound of that unit which keeps demand going, right ? BTW, the Lafayette KT-600 is no slouch in the sound department either....

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Follow Ups Full Thread

Topic - Selenium Rectifier Lowdown - mark.korda@myfairpoint.net 07:43:49 01/20/17 (16)

In the PAM & PAS, selenium only used for filament voltage... - Interstage Tranny 15:37:13 01/21/17 (4)

Don't you think its best to replace the Selenium diodes? - FenderLover 06:19:52 01/22/17 (3)

For "High Current" Amps, Absolutely ! For Vintage Preamps, Maybe... - Interstage Tranny 07:39:53 01/22/17 (2)

RE: For "High Current" Amps, Absolutely ! For Vintage Preamps, Maybe... - sony6060 13:00:28 01/22/17 (1)

RE: For "High Current" Amps, Absolutely ! For Vintage Preamps, Maybe... - Eli Duttman 17:06:02 01/22/17 (0)

Get 'Em Out! - Eli Duttman 14:45:34 01/20/17 (3)

RE: Get 'Em Out! - JURB 01:55:23 01/21/17 (2)

RE: Get 'Em Out! - Eli Duttman 03:37:51 01/21/17 (1)

RE: Get 'Em Out! - mark.korda@myfairpoint.net 10:59:32 01/21/17 (0)

RE: Selenium Rectifier Lowdown - coffee-phil 08:55:09 01/20/17 (3)

RE: Selenium Rectifier Lowdown - Interstage Tranny 15:43:48 01/21/17 (2)

RE: Selenium Rectifier Lowdown - coffee-phil 20:44:33 01/22/17 (1)

Logical Lowdown ! Troubleshoot ) Replace/Repair... - Interstage Tranny 14:40:49 01/23/17 (0)

RE: Selenium Rectifier Lowdown - Uncle Mike 08:23:08 01/20/17 (2)

Who Can Tell Us Which "World Reference" Preamps Used Selenium Rectifiers ? - Interstage Tranny 16:05:04 01/21/17 (1)

RE: Who Can Tell Us Which "World Reference" Preamps Used Selenium Rectifiers ? - mark.korda@myfairpoint.net 17:07:54 01/21/17 (0)

Follow Ups

Who Can Tell Us Which "World Reference" Preamps Used Selenium Rectifiers ? - Interstage Tranny 16:05:04 01/21/17 (1)

RE: Who Can Tell Us Which "World Reference" Preamps Used Selenium Rectifiers ? - mark.korda@myfairpoint.net 17:07:54 01/21/17 (0)

Who Can Tell Us Which "World Reference" Preamps Used Selenium Rectifiers ?

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