Eimac 4CX-350A JAN-8321 Power Amplifier Tetrode Tube New in Box!

This Eimac 4CX-350A JAN-8321 Power Amplifier Tetrode Tube, is New in the Box!

 The Box indicates 2002 Date Codes.

If you need this tube this is a new tube at a used tube price!

I have only 4 of them left at the time of this ad.

The Eimac 8321/4CX350A and 8322/4CX350F are compact radial beam tetrodes with max‑
imum plate dissipation of 350 watts and are intended for Class-AB, audio or rf amplifier
service. These tubes are externally identical to the 4CX2503 but contain rugged internal
construction features. Amplification factor and cathode area have been increased over the _
4CX2SOB to give higher transoonductance and figure of merit. _ 8321
" 4cxssoA."‘~
The 8321/4CX350A and 8322/4CX350F differ only in heater voltage and current; WW“ ‘. l
the 8321/4CX350A is used at 6.0 volts while the 8322/4CX350F is rated at 26.5 volts.
Both types are of ceramic and metal construction and are recommendedfor new
equipment design.
GENERAL CHARACTERISTICS
ELECTRICAL
Cathode: Oxide-Coated. Unipotential Min. Nom. Max.
Heating Time - - - - - ‐ - - 3 0 6 0 secs
Cathode-to-Heater Potential - - - - - - - - hso volts
Heater: 4CX350A Voltage - - - ‐ ‐ ‐ - - ‐ 6.0 volts
4CX350A Current - ‐ - - ‐ - - 2.9 3.6 amps
4033501? Voltage - - - - - - - - - 26.5 volts
4CX350F Current ~ ‐ ‐ ‐ ‐ 0.66 0.81 amps
Min. Nom. Max.
Amplification Factor (Grid‐to‐Screen) ‐ ‐ ‐ ‐ - - - ‐ - - - ‐ - - 13
Transmnductance (Ib=150 mA) - - - - ‐ - - - - ‐ - ~ - ‐ 22,000 umhos
Direct Interelectrode Capacitances. GroundedCathode:
Input - - - - - - - - - - - - - - - ‐ - - 22.2 26.2 uuf
Output ‐ ‐ - ‐ ‐ - - - -‐ - ‐ ‐ - ‐ - - - ‐ 5.0 6.0 uuf
Feedback - - - - - ‐ -‐ - - - - - - -- - - - ‐ - - - 0.05 out
Direct Interelectrode Capacitances, Grounded Grid and Screen:
Input - - - - - - - - - ~ - - - - - - - - 17.9 21.9 out“
Output - - - - - - - - ~ - - - - - - - ‐ - 5.0 6.0 uuf
Feedback - ‐- - ‐ ‐ - ‐ - - ‐ ‐ - - ‐ - - - - - - - 0.01 uuf
MECHANICAL
Base---- ‐ ----------- ‐‐‐‐‐‐ -----Speci319~pin
Maximum Operating Temperatures:
Ceramic-to-Metal Seals ‐ ‐ ‐ - - ~ -‐ - - - - - - - ‐ ‐ ‐ 250° C
AnodeCore - - ‐ ‐ - ‐ - - - - - - - ‐ ‐ ‐ ‐ ‐ - 250°C
Recommended Socket - ‐ ‐ - ‐ - - ‐ - - - - - ‐ ‐ -’ EimacSki-600 Series
Operating Position ‐ - - - - - - ‐ - ‐ - - - ‐ ‐ - - - - - - - - Any
Maximum Dimensions:
Height - - - - - - - ‐ - - - - ‐ ‐ ‐ ‐ ‐ ‐ - ‐ ‐ ‐ 2.464 inch
Seated Height ~ ‐ ‐ ‐ ‐ ‐ ‐ - - - - - ‐ ‐ - - - - ~ - 1.910 inch
Diameter - - - - - - - - - - - - - - - - ‐ - - - - ‐ 1.640 inch
Cooling - ‐ ‐ ‐ ‐ ‐ ‐ - - ‐ - ‐ - ‐ ‐ - ‐ ‐ - - - - - ‐ - - Forcedair
Net Weight - ‐ - - - - ~ ~ - - ‐ - - ‐ - - - - - - - - - - - 4 ounces
Shipping Weight (approximate) - - - - ‐ ‐ ‐ ‐ ‐ ‐ ‐ ‐ ~ - ~ - ‐ - 1.6 pounds
(Effective 6-15-65) c 1968 by Varian Printed in U.S.A.