PRELIMINARY

TO-247 Package Outline

ARF461A/B

APT's devices are covered by one or more of the following U.S.patents: 4,895,810

5,045,903

5,089,434

5,182,234

5,019,522

5,262,336

5,256,583

4,748,103

5,283,202

5,231,474

5,434,095

5,528,058

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

ARF - A

Device

ARF - B

Gate

Drain

Source

Source

Drain

Gate

Dimensions in Millimeters and (Inches)

NOTE: These two parts 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.

L1

C1

R2

R1

DUT

L2

L3

C3

C4

C7

C6

C2

C8

C9

L4

250V

+

-

RF

Output

RF

Input

C1 -- 1800pF + 1000pF 100V chips

mounted at gate lead

C2-C5 -- Arco 463 Mica trimmer

C6-C8 -- .1 mF 500V ceramic chip

C9 -- 2200 pF 500 V chip

L1 -- 4t #20 AWG .25"ID .3 "L ~80nH

L2 -- 7t #16 AWG .4" ID .5"L ~335nH

L3 -- 25t #24 AWG .25"ID ~2.2uH

L4 -- VK200-4B ferrite choke 3uH

R1-R2 -- 51 Ohm 0.5W Carbon

DUT = ARF461A/B

40.68 MHz Test Circuit

+

-

Bias

0 - 12V

C5