DEMI 3-3PA User guide

DEM Part Number 3-3PA

10GHz Linear Amplifier

Specifications

Frequency range: 10.0 - 10.5 GHz.

Power Out: 3Watts nominal 3.2W Saturated

Power Input for rated power out: 10 mW for linear operation

Return Loss >10dB@ 10.368 GHz

DC requirements: 13.8 volts DC@ 2.2 amps. for nominal output

16 volts DC absolute maximum 10Volts Minimum

Connectors: SMA(F) only

Size: 2" L x 4" W x 2" H Standard

1.5" L x 4.1" W x 2" H Optional

Active devices: FM5061VF (Eudyna)

Keying Option: PTT - H (1.5-15Volts for transmit)

PTT - L (Ground for transmit)

The Down East Microwave Inc. 3-3PA linear amplifier is a simple gain block for the amateur
3 cm band. It will provide >3 Watts saturated output power with 10mW of drive. It requires
external T/R switching and can be used by itself or as a driver for a higher power amplifier. The
amplifier requires a single 13.8 volts DC supply at 2.2 amps, but will operate at reduce ratings
down to 10 volts and up to 16 volts. The unit is provided with an internal negative bias supply and
keying circuit for ease of use.

To achieve maximum performance the amplifier should be mounted in a well ventilated area
with heat sink fins in the vertical position for optimum cooling, or bolted to a heat sink if the optional
unit is ordered. It is advisable but not necessary to use circulators and band pass filters when
available. This will prevent stray oscillations and needless waste of power by amplifying local
oscillator frequencies or generating high power out of band spurious signals.
This amplifier is a perfect match for our 10368-144 transverters. Optional TR switching to
key the amplifier directly with the transverter is available. Please contact DEMI with any question
and for transverter/amplifier package deals.

/Built/3-3pa.doc 1 Rev A 4/13/2007

All resistors and capacitors are chip components unless specified.
C1 1.0ρF C12 2.2µF can
C2 1000ρF C13 0.1µF
C3 0.1µF C14 10.0µF
C4 2.2µF can C15 10.0µF
C5 2.2µF can C16 1000ρF
C6 100µF can C17 10.0µF
C7 0.1µF
C8 0.1µF R3 5.1K Ω
C9 0.1µF R4 5.1K Ω
C10 1000ρF R6 51Ω
C11 1.0ρF R7 3Ω 10 watt

Pin Out:
1 VGG
2 RF in
3: N.C.
4: VDD
5: RF Output
6: VDD

3-3PA Component List

VR1 78M05
Q2 2N2222
D1 1N4000
D2 1N914 or 1N4148
D3 CZ5348B
K1 G5V-5

R2 200 POT IC1 NMA0505S

IC2 FMM5061VF
PCB board

3

2

1

4

5

6

/Built/3-3pa.doc 2 Rev A 4/13/2007

/Built/3-3pa.doc 3 Rev A 4/13/2007

E5

+

E4

E9

+

E11

E7

+

+

E8

D3

E10

E1

+

+

+

E6

/Built/3-3pa.doc 4 Rev A 4/13/2007