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  1. Replies
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    Wayne, You may have a problem with a MPSA42 on...

    Wayne,

    You may have a problem with a MPSA42 on the meter drive board. You may also want to check the capacitors as well.

    Ed
  2. Replies
    2
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    Marco, The front end in the Phase Linear 5000...

    Marco,

    The front end in the Phase Linear 5000 was made by Alps and was also used by a number of other manufacturer's.
    A.P. Van Meter designed the 500 tuner. A.P. also worked for McIntosh and...
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    Dean had told me he never got a good answer from...

    Dean had told me he never got a good answer from the engineering department. I will have to go through all the documents I have been gathering again. Somewhere is a good explanation I found that I...
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    Marco, With regards to Phase Linear amplifiers...

    Marco,

    With regards to Phase Linear amplifiers like the 400 and 700's..........

    The 400 series amplifiers typically did not have this problem. Probably because of the way the amplifiers were...
  5. Ron, Bob is a good story teller. I also...

    Ron,

    Bob is a good story teller. I also learned a few things I hadn't known before.

    The Clair Brothers part of the interview only relates to the Carver magnetic field amps. Bob had left Phase...
  6. Bob Carver (Video) at Rocky Mountain Audio Fest (published Oct 26, 2017)

    Bob Carver talks about the following:
    1.) Phase Linear 700
    2.) How to start an amplifier company
    3.) The Phase Linear VI (energy limiter) patent
    4.) RCA application note "High Powered Amplifiers...
  7. Ron, I figured as much. Phase Linear used...

    Ron,

    I figured as much.

    Phase Linear used the RCA1B05's only for a short period of time as they didn't current share too well.

    Someone on this forum might have some they pulled from their...
  8. Ron, I saw the post on diyaudio as well. A lot...

    Ron,

    I saw the post on diyaudio as well. A lot of people just generically replace output transistors with MJ series devices without regard as to whether they will oscillate in their amps. Without...
  9. Ron, The RCA 65372's are more than likely a...

    Ron,

    The RCA 65372's are more than likely a OEM part that was made for Cerwin-Vega. Much like the RCA66546 drivers made for Phase Linear that were actually a selected RCA410.
    I can't find a cross...
  10. Here is a copy of the A-1800, A-3000 sales...

    Here is a copy of the A-1800, A-3000 sales brochure.

    Ed
  11. Ron, Unfortunately the photos of the output...

    Ron,

    Unfortunately the photos of the output transistors are a little blurry.

    The (4) digit numbers you have above are the dates codes (the first 2 are the year, the second 2 are the week.)
    ...
  12. The Mud Factor by Paul W. Klipsch (Audio magazine October 1970)

    source: http://www.americanradiohistory.com/Archive-Audio/70s/Audio-1970-10.pdf
  13. Experiences In Stereophony by Paul W. Klipsch (Audio magazine July 1955)

    source: http://www.americanradiohistory.com/Archive-Audio/50s/Audio-1955-Jul.pdf
  14. The Klipsch Reproducer by Paul W. Klipsch (FM And Television Magazine Sept 1947)

    source: http://www.americanradiohistory.com/Archive-FM-Magazine/FM-1947-09.pdf
  15. Speaker Power by Paul W. Klipsch (Audio Magazine Oct 1961)

    Source: http://www.americanradiohistory.com/Archive-Audio/60s/Audio-1961-Oct.pdf pgs 54, 88
  16. "Audiophile Speak" Terms & Definitions (a.k.a. Buzzwords)

    For those people who like to do “subjective” testing or listening of their stereo systems, here is a list of “audiophile speak” (buzzwords).

    Impress your friends, fellow audiophiles and salesmen...
  17. Lies, Damn Lies and Audio Gear Specs “How Audio Gear is Spec’d And Measured” VIDEO

    Lies, Damn Lies and Audio Gear Specs “How Audio Gear is Spec’d And Measured” AES 2013 Workshop Panel; Ethan Winer, David Moran, Mike Rivers, Scott Dorsey
    ...
  18. I don't have any spare HB2E-DC24V's left. I...

    I don't have any spare HB2E-DC24V's left.

    I stopped buying 3000's years ago. The math just wasn't working out. Let's see.... I wouldn't ever want to spend more than $50 for a used 3000. Add the...
  19. Don, A "few years ago" goes by quickly. More...

    Don,

    A "few years ago" goes by quickly. More likely 5+ years ago. What is the date code on the output transistors?

    Audio Analysts did a good job to taking care of these amps. The reason they...
  20. The 3000 is a bit finicky. Any dirt that gets...

    The 3000 is a bit finicky. Any dirt that gets inside the switch assemblies can cause false triggering of the IC's. You will need to squirt some cleaner/lubricant like LPS1 sparay or one of the Caig...
  21. To all the folks here on the forum who have...

    To all the folks here on the forum who have built, rebuilt or modified any Phase Linear amps, I would like to know which of the parameters noted below you are currently testing.
    All I need are the...
  22. Perry, All I am asking for from Joe is what...

    Perry,

    All I am asking for from Joe is what specs the average guy who builds one of these amps utilizing his pc boards can expect.
    Kit companies like Heathkit, Dynaco, Hafler, etc didn't have a...
  23. WOPL Rev E PC Board (w/ or w/o Backplane Boards) Performance Specifications Wanted

    Here is my request for the performance specifications for a White Oak Audio (WOPL) Rev E pc board (w/ or w/o back plane boards) installed Phase Linear 700 and Phase Linear 400 amplifiers.

    If the...
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    Perry, You may want to talk to Joe about the...

    Perry,

    You may want to talk to Joe about the "high performance" version of wiring the back-plane boards that will improve the channel separation (a.k.a. crosstalk).
    If my memory serves me...
  25. Nick, Thanks for offering up some specs on...

    Nick,

    Thanks for offering up some specs on your board.

    Is the S/N ratio unweighted or A weighted or perhaps DIN (Audio) flat from 22-22kHz?

    Is the power bandwidth (essentially) flat all the...
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