Technical Manual
PINEAPPLE TECHNOLOGY, INC.
UTX5KW-A Operating and Service Manual
H. S10-10 SPLITTER
The S10-10 SPLITTER is a 10-way in-phase broadband splitter. This splitter provides an equal split of drive
power to each U600LDV-2 power amplier.
SEE SECTION VI.F. (page 35) FOR PARTS LIST.
I. MFA1KW PA HOUSING
The MFA1KW is the main RF Power Amplier housing which accommodates two (2) U600LDV-2 Ampliers.
The housing includes the following:
2 ea....................................................................... 330 CFM cooling fans
2 ea....................................................................... Air lter assemblies
2 ea....................................................................... Front panel status PC Boards
1 ea....................................................................... Main chassis
2 ea....................................................................... Mechanical slide assemblies
1 ea....................................................................... AC Filtered inlet for cooling fans
SEE SECTION VI.D. (page 19) FOR SCHEMATICS AND PARTS LIST
J. U600LDV-2 POWER AMPLIFIER
The U600LDV-2 is the main RF Power Amplier Assembly used in the UTX5KW-A. Each Amplier
assembly is made up of ve (5) U250LD power pallets. Each power pallet uses two (2) Philips BLF861A
power LDMOS FETs. These ampliers are operated in Class A/AB or sometimes referred to as “HARD AB.”
This refers to the bias levels to achieve best linearity.
Each U600LDV-2 amplier assembly includes the following:
5 ea....................................................................... U250LD power pallets
1 ea....................................................................... 4-way splitter
1 ea....................................................................... 4-way combiner
1 ea....................................................................... phase & gain matching circuit (1A0018)
1 ea....................................................................... Pwr distribution module (1A0025)
1 ea....................................................................... high power isolator
3 ea....................................................................... thermal sensors
1 ea....................................................................... remote monitor port (DB9)
1 ea....................................................................... front panel status port (molex)
1 ea....................................................................... ltered DC input port
1 ea....................................................................... Type N panel mounted RF Input port
1 ea ...................................................................... Type N Panel mounted RF Output port
SEE SECTION VI.E. (page 23) FOR SCHEMATICS AND PARTS LIST.
K. UC5KW-DC40 COMBINER/DD COUPLER
The UC5KW is a 10-way in phase combiner with built in 40 dB dual directional coupler. The combiners are
designed for the channel designated for the transmitter. This is a closed unit and can not be serviced.
SEE SECTON VI.G. (page 36) FOR PARTS LIST
V — THEORY OF OPERATION
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