L1

C2

T1

R1

DUT

L2

L3

L4

C3

C6

C7

C5

L5

150V

+

-

RF Output

RF Input

C1 -- 680pF Unelco

C2-C4 -- Arco 463 Mica Trimmer

C5-C7 -- 1nF 500V COG chip

L1 -- 0.8" #18 AWG into hairpin ~19nH

L2-L3 -- 3t #18 AWG .25" ID ~50nH

L4 -- 10t #18 AWG .25" ID ~470nH

L5 -- VK200-4B ferrite choke ~3uH

R1 -- 25 Ohm 1/2W Carbon

T1 -- 4:1 Broadband Transformer

81.36 MHz Test Circuit

C1

C4

Parts List

TO-247 Package Outline

15.49 (.610)

16.26 (.640)

5.38 (.212)

6.20 (.244)

6.15 (.242) BSC

4.50 (.177) Max.

19.81 (.780)

20.32 (.800)

20.80 (.819)

21.46 (.845)

1.65 (.065)

2.13 (.084)

1.01 (.040)

1.40 (.055)

5.45 (.215) BSC

3.55 (.138)

3.81 (.150)

2.87 (.113)

3.12 (.123)

4.69 (.185)

5.31 (.209)

1.49 (.059)

2.49 (.098)

2.21 (.087)

2.59 (.102)

0.40 (.016)

0.79 (.031)

2-Plcs.

Top View

ARF449A

Device

ARF449B

Gate

Drain

Source

Source

Drain

Gate

Dimensions in Millimeters and (Inches)

NOTE: The ARF446 and ARF447 comprise a symmetric

pair of RF power transistors and meet the same electrical

specifications. The device pin-outs are the mirror image

of each other to allow ease of use as a push-pull pair.

ARF449A/449B

81.36 MHz Test Circuit

APT’s products are covered by one or more of U.S.patents 4,895,810 5,045,903 5,089,434 5,182,234 5,019,522

5,262,336 6,503,786 5,256,583 4,748,103 5,283,202 5,231,474 5,434,095 5,528,058 and foreign patents. US and Foreign patents pending. All Rights Reserved.