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There were (2) amps on ebay and the auction just ended. The first amp sold for $551 and the second one for $561. Did anyone on this forum buy any of the amps?

I called and left a brief message with Steve Mantz. I am awaiting his reply. In the meantime, I did a little more research and found some additional posts of his regarding Phase Linear using the name "MOER" on diyaaudio...

I would love to see the THD+N numbers at 20kHz both channels driven (at the same time) at rated output 360 watts per channel (53.66V) into 8 ohms. BW limited to 80kHz on your analyzer. Ed

Mark, Can you scan all the pages and save it as a PDF? Thanks! Ed

Some additional Steve Mantz ("MOER") postings. https://www.diyaudio.com/forums/solid-state/182404-recapping-phase-linear-400-a-2.html https://www.diyaudio.com/forums/solid-state/186493-phase-linear-oscillation-3.html...

It looks like the pc board has a discrete front end (no I.C.'s). NOTE: Phase Linear PL-36 p.c. boards used either LF-356 or LF-351 I.C.'s which were noisier than their earlier series one p.c. boards.

I contacted the seller. It turns out that I have heard about him in the past. His name is Steve Mantz and his business name is Zed Audio Corp. http://www.zedaudiocorp.com/pdf/history.pdf http://www.zedaudiocorp.com

https://www.ebay.com/itm/Vintage-Phase-Linear-400-Power-Amplifier-Refurbished/273823218505?hash=item3fc122bb49:g:S00AAOSwSv9cw4BC Does anyone know who this person is that is selling this amp? Just in case the ad disappears I have copied the text and pasted it below: Up for auction is a...

Audio Noise Reduction Through the Use of Bulk Metal® Foil Resistors — "Hear the Difference" Vishay Application Note AN0003 http://c-c-i.com/sites/default/files/vse-an00.pdf http://www.vishaypg.com/docs/49788/10reasns.pdf

HP 8903 software: http://www.pmillett.com/hp_8903_software.htm

Mark, I did some testing on (2) 700 series 2 amplifiers that Don G. owns. Both have a fully complementary output. One was a WOPL with a rev E board. The other was a Phase Linear (Clair Brothers) 700 series 2 amp. The Clair Brothers had a PL-36 pc board with a factory low distortion mod (which...

So what is it that would create a "big soundstage"? Better channel separation (a.k.a crosstalk), etc?

The first one in the ebay ad is an Edmonds version. The second one I am not sure of as I don't have a copy of this one. The 3rd one (OM400-3) was when they were in Lynnwood and is actually a gray cover. Ed

I posted the following a little while ago: A Phase Linear 700 series II amplifier; single channel driven at 1kHz into 8 ohms at 1% THD should be around 510-515 watts. Both channels driven at 1kHz into 8 ohms at 1% THD should be around 440 watts. Both channels driven at 1kHz into a 4 ohm load at...

Yes there are differences between the Edmonds, WA and Lynnwood, WA versions of the Phase Linear 400 series 1 owner's manual. I have second generation photocopy of the Edmonds, WA manual. I am also missing pages 6 and 7 and am unsure whether there were any pages beyond page 8. Ed

I am not the one who would give permission or not on posting any Phase Linear documents. Phase Linear is now owned by Vox Electronics (formerly Audiovox). Ed

Phase Linear 400 Review (Hi-Fi World Spring 1974) I previously posted this with a second or third generation copy which was missing the cover and index pages. Here is a 1st generation copy with cover page, index page, pages 40-42, and 54.

Phase Linear 4000 Review (StereOpus Volume 1 No. 3 1975) (see cover page, index pages and pages 17-19 below.)

Phase Linear 400 vs Crown DC-300 (Hi-Fi Newsletter Volume 3 Number 4 May-June 1973) (see cover page and pages 22-26 below)

Phase Linear 400 vs. Dynaco 400 Amplifier (Hi-Fi World Newsletter Volume 1 Number 4 Winter 1974) (see cover page and pages 21, 22 and 24 below)