THE TETRODE BOARDS. Calculation of R1, R12, R14 This spreadsheet follows the method in Application Note IFW Technical Services

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THE TETROE BOAR Calculation of,, This spreadsheet follows the method in Application Note 00 IFW Technical ervices Modification for FFRV board, with power MOFET and at C ground Rev b October, 00

1 THE TETROE BOAR Calculation of,, This spreadsheet follows the method in Application Note 00 IFW Technical ervices Modification for FFRV board, with power MOFET and at C ground Rev b October, 00 Application Note, Figure (modified) Vu I 0,9 K I + Vr I,0 K CONTANT VOLTAE Q on FFRV boards I Vd Vs K I TETROE +0V Input cells are Yellow Results are Red tep Enter unregulated input voltage: Vu = 00 V at load ~ 0 Enter regulated output voltage: Vr = 0 V Tube: U-78B Values in Figure Resistor : Use next standard value below,00 k I = 0, Enter value used for : = k Power dissipation of W I Pos= 0, Enter maximum positive screen current: I = + 00 I = 9, Minimum value of I (keep-alive current for ) = 0 (fixed) I Neg= -89, Resistor : Use next standard value below, k I = 8, Enter value used for : = 0,9 k Power dissipation of W Enter maximum negative screen current I =- 00 Resistor : Use next standard value below,7 k 7 Enter value used for : =,0 k Maximum power dissipation of = 9 I= 8, minimum VCE of 0 V (fixed) Power dissipation of =, W I 0 or + 00 Power dissipation of = 7,8 W I - 00 MAXIMUM power dissipation of = 7,8 W ELECT REITOR MAX IIPATION AT LEAT OR x UE POWER IIPATION EE TEMP V POWER CURVE, REITOR CAN BE PARALLELE TO OBTAIN THE EIRE VALUE ( E. x, K 0 W IN // TO HAVE, K 0 W ) REITOR CAN BE ERIALIE TO OBTAIN THE EIRE VALUE ( E. x 70 0 W in ERIE TO HAVE 0,9 K 00 W ) EIN CHECK o back to tep now, and try a % lower value for Vu. In cell, enter 7 V o you see any red error messages? If you see any red error messages, your present resistor values are marginal! You should reduce the indicated resistor values, and/or increase the transformer voltage, until no error messages appear when you decrease Vu by % from your expected minimum value at maximum current. EXCEPT IF YOU ARE URE OF INPUT VOLTAE TABILITY AT I CURRENT, AN NETWORK MINIMUM VOLTAE, Version.0 7 March 00 by MEK Modified by FFRV october 00

2 TO REPLACE A CENTRAL 0 METER BY AN ORINARY METER, UE A IMPLE RECTIFIER BRIE BEHIN METER HUNT, BUT, YOU WILL NOT KNOW IF CURRENT I NEATIVE OR POITIVE!! BAT 00V R 90 0 W R W W R k 0 W METER HUNT mv PTT TET CURRENT R.k 00 W Neg Current Pos Current R0 0k BC OR 7 RV.k THI REITOR 0 ONLY FOR IMUTATION TO HAVE EXACTLY 0 V R 8k Z BZX79CRL 0 R 8k R7 00k Q TWNK00Z TW9NK70Z OR EQUIVALENT AE R7 00 k to Meg to improve regulation and avoid oscillations µa V R I hunt () Q V P R (W) P Q (W) PTT OFF ~. ~. ~. ~7.8 ~. ~0 W TETROE LINEAR AMPLIFIER HUNT UPPLY WITH MOFET OC N : Amateur Radio BY: ffrv@sfr.fr ATE: /08/ REV: PAE: /

3 TO REPLACE A CENTRAL 0 METER BY AN ORINARY METER, UE A IMPLE RECTIFIER BRIE BEHIN METER HUNT, BUT, YOU WILL NOT KNOW IF CURRENT I NEATIVE OR POITIVE!! BAT 00V R 90 0 W R W W R k 0 W METER HUNT mv PTT TET CURRENT R.k 00 W Neg Current Pos Current R0 0k BC OR 7 RV.k THI REITOR 0 ONLY FOR IMUTATION TO HAVE EXACTLY 0 V R 8k Z BZX79CRL 0 R 8k R7 00k Q TWNK00Z TW9NK70Z OR EQUIVALENT AE R7 00 k to Meg to improve regulation and avoid oscillations µa V R I hunt () Q V P R (W) P Q (W) PTT OFF ~. ~. ~. ~7.8 ~. ~0 W TETROE LINEAR AMPLIFIER HUNT UPPLY WITH MOFET OC N : Amateur Radio BY: ffrv@sfr.fr ATE: /08/ REV: PAE: /

4 +V BAT V BAT 0V BRIE B WATT U N CTR= Z BZX79CV V +V Z BZX79CV RV 0k RV8 0k BAT V 8 U:A LM8N RV7 0k 7 0k R9 00k N007 7 U:B LM8N M Z V URE V RL V TRIP UR EXCE COURANT CONTACT 'OUVRE PENANT ~ ECONE PUI E REFERME AUTOMATIQUEMENT C uf BZX79C TRIP HUNT UPPLY WITH MOFET Q B70 +V OK TRIP PREENCE 0V APRE FUIBLE OC N : Amateur Radio BY: ffrv@sfr.fr ATE: /08/ REV: 9 M Q7 B70 PAE: /

5 +V BAT V BAT 0V BRIE B WATT U N CTR= Z BZX79CV V +V Z BZX79CV RV 0k RV8 0k BAT V 8 U:A LM8N RV7 0k 7 0k R9 00k N007 7 U:B LM8N M Z V URE V RL V TRIP UR EXCE COURANT CONTACT 'OUVRE PENANT ~ ECONE PUI E REFERME AUTOMATIQUEMENT C uf BZX79C TRIP HUNT UPPLY WITH MOFET Q B70 +V OK TRIP PREENCE 0V APRE FUIBLE OC N : Amateur Radio BY: ffrv@sfr.fr ATE: /08/ REV: 9 M Q7 B70 PAE: /

Chapter 2 Homework Solution P2.2-1, 2, 5 P2.4-1, 3, 5, 6, 7 P2.5-1, 3, 5 P2.6-2, 5 P2.7-1, 4 P2.8-1 P2.9-1

Chapter 2 Homework Solution P2.2-1, 2, 5 P2.4-1, 3, 5, 6, 7 P2.5-1, 3, 5 P2.6-2, 5 P2.7-1, 4 P2.8-1 P2.9-1 Chapter Homework Solution P.-1,, 5 P.4-1, 3, 5, 6, 7 P.5-1, 3, 5 P.6-, 5 P.7-1, 4 P.8-1 P.9-1 P.-1 An element ha oltage and current i a hown in Figure P.-1a. Value of the current i and correponding oltage