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Thread: oldphaser (Ed) Builds Some Amps (Phase Linear & White Oak Audio)

  1. #1

    oldphaser (Ed) Builds Some Amps (Phase Linear & White Oak Audio)

    Finally after all these years, I am just about to finish up a batch of Phase Linear 700 series amplifiers with W.O. Audio and Phase Linear pc boards. I intend on having (1) of every revision of pc board installed in each one of these amps including Phase Linear PL0171, PL14A, PL20, PL36 and W.O.A. rev A, C, D and E. Initially only (1) of these amplifiers will have W.O.A. back plane boards. After completion of these amplifiers, I will be performing extensive tests. There are several rare 700 (series 1) amps I hope to test including the following; bridge amp (no pc board designation), Kelly DeYong amp and 700HF (modified PL0171). This will take some time to complete and the results will be published when completed.

    NOTE: I have also acquired some additional test equipment and will be acquiring more in order to perform these tests.

    Here is a photo of a W.O.A. Rev E board I just started on a few days ago.

    NOTE: I might suggest starting with installing the diodes first as they are the smallest and then the resistors and so forth. Also, Phase Linear typically mounted the resistors with the color coding from left to right (when facing the pc board with the wiring located at the bottom of the board). In this case, I followed the instructions and mounted them from right to left. I could be wrong, but I didn’t see any instructions for mounting the IC socket. However, I think perhaps that will be next before I proceed to following the next series of steps in the instructions.

    I am open to suggestions as to what people are using for cleaning the flux from the pc boards. I was taught by Dean many years ago to use Acetone. However, I haven’t always found this to be the best case.

    Lee and Joe have been very kind in providing me with parts and some completed Rev A and D pc boards over the years.

    I apologize for the long delay.
    Attached Thumbnails Attached Thumbnails Click image for larger version. 

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    Last edited by oldphaser; 09-12-2018 at 01:58 PM.

  2. #2
    New Around These Parts Vynuladikt's Avatar
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    ---
    Try denatured alcohol and a small soft brush. It's not quite a good as xylene but much less hazardous to use.

  3. #3

    Solder & FluX Removal

    Perhaps I should have mentioned which solder I am using when asking for some input as to what chemicals people are using for flux removal.

    I use a variety of diameters of MG Chemicals Sn63/Pb37 RA Solder Wire, depending upon the size and nature of the connection.

    MG Chemicals sells (2) different types of flux removers; "Heavy Duty Flux Remover" (with acetone and alcohols) and "Flux Remover For PC Boards" (with ethyl alcohol, isopropanol, and ethyl acetate).

    http://www.mgchemicals.com/downloads...alog%20Web.pdf

    Ed

  4. #4

    Choosing Solder

    Here is a link to a website that discusses "Choosing Solder".

    https://www.neurochrome.com/choosing-solder/

  5. #5
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    Halfbiass...Electron Herder and Backass Woof
    Good to see you finally getting on with this Ed , should be interesting ..
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

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    ---I run with Scissors
    I bought a quart of Acetone last week at our small town True Value hardware. I had to ask three times & they finally went ' out back' and got one.
    Even though I'm in there several times a week , I felt like I was asking for a quarter pound or something.
    I wonder if it is used for making meth? That's a big deal here in the deep Ozarks.

  7. #7
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    Halfbiass...Electron Herder and Backass Woof
    Prolly not Brad......now if you asked for ether.....
    taking something that's already good, and making it better...........and for the knowing smiles that cross their faces.......Nando-2011...

    "Silence cannot be Misquoted"--Lazarus Short-2012 "

    " I Just Collect Smiles Craig......Cheap Smiles!-----Fishoz-2017

    "anything can be done, it's finding the easiest way that's hard"-----Bobbysdad--2014

    " Synth percussion is deadly to children, house pets and shitty power supplies"---Stephen Evans 2014

    " You have not reached the point of diminishing returns, you've just ran out of money

    " The Pioneer U-24, unfortunately, is just too expensive and rare to find. That's why I have one."--Nando-2014

  8. #8
    Administrator Gepetto's Avatar
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    Old 'Arn Enthusiast
    Use Kester no-clean solder part number 245 1.1% flux. Full part number is Kester SN63PB37 1.1%/245 It is very low residue and the residue left behind is easy to clean when compared to Kester 44 Rosin flux.

    Cleaning with this solder is optional. Clean using 91% isopropyl alcohol (available at Walmart in the pharmacy section) not acetone. Organic solvents such as acetone, tri-chlor and xylene attack the rubber seals in the electrolytic capacitors and should never be used (in addition to being bad for you). You can also use 3M Novec which is extremely good flux remover but is also very expensive.

  9. #9
    Administrator Gepetto's Avatar
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    Quote Originally Posted by oldphaser View Post
    Finally after all these years, I am just about to finish up a batch of Phase Linear 700 series amplifiers with W.O. Audio and Phase Linear pc boards. I intend on having (1) of every revision of pc board installed in each one of these amps including Phase Linear PL0171, PL14A, PL20, PL36 and W.O.A. rev A, C, D and E. Initially only (1) of these amplifiers will have W.O.A. back plane boards. After completion of these amplifiers, I will be performing extensive tests. There are several rare 700 (series 1) amps I hope to test including the following; bridge amp (no pc board designation), Kelly DeYong amp and 700HF (modified PL0171). This will take some time to complete and the results will be published when completed.

    NOTE: I have also acquired some additional test equipment and will be acquiring more in order to perform these tests.

    Here is a photo of a W.O.A. Rev E board I just started on a few days ago.

    NOTE: I might suggest starting with installing the diodes first as they are the smallest and then the resistors and so forth. Also, Phase Linear typically mounted the resistors with the color coding from left to right (when facing the pc board with the wiring located at the bottom of the board). In this case, I followed the instructions and mounted them from right to left. I could be wrong, but I didnít see any instructions for mounting the IC socket. However, I think perhaps that will be next before I proceed to following the next series of steps in the instructions.

    I am open to suggestions as to what people are using for cleaning the flux from the pc boards. I was taught by Dean many years ago to use Acetone. However, I havenít always found this to be the best case.

    Lee and Joe have been very kind in providing me with parts and some completed Rev A and D pc boards over the years.

    I apologize for the long delay.
    Hi Ed
    I emailed you the assembly order document to help your current assembly project.

    Joe

  10. #10
    Quote Originally Posted by Gepetto View Post
    Use Kester no-clean solder part number 245 1.1% flux. Full part number is Kester SN63PB37 1.1%/245 It is very low residue and the residue left behind is easy to clean when compared to Kester 44 Rosin flux.

    Cleaning with this solder is optional. Clean using 91% isopropyl alcohol (available at Walmart in the pharmacy section) not acetone. Organic solvents such as acetone, tri-chlor and xylene attack the rubber seals in the electrolytic capacitors and should never be used (in addition to being bad for you). You can also use 3M Novec which is extremely good flux remover but is also very expensive.
    Joe,

    Thanks for the info. I will check into it.

    Ed

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