Skip to content
View in the app

A better way to browse. Learn more.
www.Head-Case.org

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

The Ultimate DIY Part 2 ? The KGITSOJC

kevin gilmore
in Do It Yourself

Featured Replies

Kevin suggested using 20K feedback resistors, I soldered those in, as well as changed most of the other resistors to 0.1% 2512 smd resistors. Input jfets are from diyaudio.com store, matched within 0.1ma. Got new transformer and now using GRLV set to +/-20V,  I cannot get the offset close to zero, +output to ground 0.1-0.2mV/other channel 0.1-0.3mV, -output to ground about 10mV/other channel around 17mV. measured between + and - output, one channel around 12mV, the other channel around 19mV. I measured without connecting anything to the inputs or outputs. What should I change to get rid of this problem? 

 

  • Replies 350
  • Views 130.1k
  • Created
  • Last Reply

Top Posters In This Topic

Popular Days

Most Popular Posts

  • kevin gilmore
    kevin gilmore

    Sure there is a schematic. Its in my head somewhere. There will be an official schematic at some point. There is a bunch of different ways to build it including single ended only, and balanced/sin

  • c12mech
    c12mech

    Has there been any work on this lately?  I really want to do this one.

  • mypasswordis
    mypasswordis

    Input JFETs just came in the mail. Most of them look real, there are a couple 2sk170s that have funky looking printing on them that I'm not sure about. Will measure IDSS later.    Finally the projec

Posted Images

Please sign in to comment

You will be able to leave a comment after signing in

Sign In Now
Go to topic listing

Important Information

By using this site, you agree to our Terms of Use.

I accept

Account

Navigation

Search

Search

Configure browser push notifications
Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.