829B

829B has no equivalent designation confirmed by the archive.

Construction

The 829B is a dual-unit tube; ratings and characteristics are given on a per-unit basis. It has a common cathode connection for all circuit returns. The base-pin gauge has six holes of 0.0800 inch and one hole of 0.1450 inch arranged on a 1.0000 inch circle. The plate leads will enter a flat-plate gauge having two holes of 0.1200 inch whose centers are located at a distance of 0.424 inch from the axis YY'. The exhaust tip will not extend beyond the plane which passes through the ends of the three longest pins.

Ratings

The RCA datasheet for the 829B gives maximum CCS ratings as absolute-maximum values. Under CCS conditions, the maximum DC plate voltage is 750 volts, the maximum DC grid-No.2 voltage is 225 volts, and the maximum DC grid-No.1 voltage is -175 volts. Under ICAS conditions, the maximum DC plate voltage is 600 volts, the maximum DC grid-No.2 voltage is 250 volts, and the maximum DC grid-No.1 voltage is -175 volts.

Operating Considerations

Grid-No.1-circuit resistance should not exceed 100000 ohms when grid No.1 is operated in the negative region with fixed bias. The RCA datasheet states that cathode bias is not recommended for the 829B. Shielding of the 829B in an rf amplifier is required for stable operation.

Original manufacturer datasheets for 829B, hosted by Frank Philipse's Electron Tube Data sheets.

Documents held here and used to write this page.

• TYPICAL CHARACTERISTICS For Each Unit