AES Journal Forum

Three-Halves-Power Law Models for Actual Vacuum Tubes

Document Thumbnail

Presented are two new equations for three-halves-power law vacuum tube models fitted to actual devices. First, an equation involving the vacuum tube’s electrode voltages used as the variable of a polynomial that is fitted to tube amplification factor characteristics is presented. Second, a current division equation that combines grid current calculation of existing empirical formulae and caters for screen grid current at low plate voltages, a situation not handled by these, is presented. Included is an exponential function to smooth the discontinuity in plate current due to the model’s conditional treatment of grid current when tube operation moves between negative and positive control grid regions, to aid computation of derivative based tube properties such as transconductance.

JAES Volume 68 Issue 6 pp. 441-453; June 2020
Publication Date:

Click to purchase paper as a non-member or you can login as an AES member to see more options.

No AES members have commented on this paper yet.

Subscribe to this discussion

RSS Feed To be notified of new comments on this paper you can subscribe to this RSS feed. Forum users should login to see additional options.

Start a discussion!

If you would like to start a discussion about this paper and are an AES member then you can login here:

If you are not yet an AES member and have something important to say about this paper then we urge you to join the AES today and make your voice heard. You can join online today by clicking here.

AES - Audio Engineering Society