Search results

  1. grapplesaw

    FS Carver C-4000

    I have been listening to this unit for a while now. It is very clear without any noise. Would mate with any Phase Linear. I will list this next week on other sites if no interest here Thanks Glen
  2. grapplesaw

    SpaceX

    Here is the SpaceX. BFR going into testing to fly to Mars
  3. grapplesaw

    SpaceX

    Spacex and it’s partners are layering up to 10,000 low orbit satellites to create a short lag time internet system. This may revolutionize cell and internet provides and move it all to satellites. We use sat internet from traditional high orbit satellites there is about .75 second lag when...
  4. grapplesaw

    New Knobs For Phase Linear Amps

    Ed you kill me
  5. grapplesaw

    FS Carver C-4000

    Ok Will do
  6. grapplesaw

    FS Carver C-4000

    Lee I get Noise floor at .325mv or -70 DBv in A weighted setting Does that make sense?
  7. grapplesaw

    FS Carver C-4000

    I will have a look and let you know
  8. grapplesaw

    WTB push button caps

    Man that’s a deal
  9. grapplesaw

    FS Carver C-4000

    Here is a good condition but not perfect C-4000. It has new electrolytic Nichicon bypolar caps in signal path and high voltage Nichicon’s in power supply throughout unit. Power supply upgraded. Output op amps upgraded with OPA2134 / brown dog. Complete with decoupling caps on rail supply at...
  10. grapplesaw

    WTB push button caps

    I got two Just one million dollars I ll send them to you
  11. grapplesaw

    Carver C-500

    You bet I’ll comment Joe. The Carver C500 makes a good conversation to White oak control board. If you reed this thread you see how to work around the difference between a phase linear series ll on the c500 https://forums.phxaudiotape.com/threads/carver-c-500-upgrade-to-wopl.7127/
  12. grapplesaw

    My PL D500

    Nice looking amp you have there From the photo it looks all original. There are some must do things I can guide you with. Send me a private message so we can discuss further.
  13. grapplesaw

    Phase Linear D-500 LED meter face-plate chemical corrosion damage. Is a fix possible?

    Sorry that I had not seen your interest in that amp before I bought it. As far as your need for a plate I am going to make some back plates in the new year in black so may have a good OEM one for you then.
  14. grapplesaw

    phase linear D 500 right channel LED not working correctly

    Can not say who made the meter boards. I can tell you that 500 has a unique meter board. There are many additional things going on in it such as dc protection. High / low rail voltage control and various safety items The circuit running the meters is basically the same and incorporated into...
  15. grapplesaw

    Power stage Phase Linear 400 serie 2

    Now that you can power it on with out a bright bulb try taking that out and power it on to full voltage. Let it rest for 20 minutes then check bias and set at .350 mv and check positive to negotive output binding posts for dc offset hopefully you will have 10mv or less. I put 1.5 or 2 amp...
  16. grapplesaw

    phase linear D 500 right channel LED not working correctly

    Ugh! Anyone seen this in a 700 series ll? The led meter circuit is the same for both the 700 ll and dual500
  17. grapplesaw

    Power stage Phase Linear 400 serie 2

    Read this tread about my struggles with a bias problem How to bypas is disvussed here https://forums.phxaudiotape.com/threads/the-ultimate-dual-500-rising-from-the-ashes-build.6814/page-10#post-180299
  18. grapplesaw

    Power stage Phase Linear 400 serie 2

    Have you tried to put a signal through this channel and checked the sine wave? If it is clean this will eliminated somethings needed to be checked. A small current is all you need to check it. If bad report back Bad solder joint on the bias transistors wire connections to the control board...
  19. grapplesaw

    phase linear D 500 right channel LED not working correctly

    Here is better layout. I guess I should use my glasses.
  20. grapplesaw

    phase linear D 500 right channel LED not working correctly

    Here is there locations. The two ceramic caps are in the general area
Top