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PHILIPS FM828 E BAND Power Output Module (30mW in 25W out) ONLY

Philips

$10.00
SKU:
CHKGUM7566
Condition:
Used
Minimum Purchase:
1 unit
Maximum Purchase:
1 unit
Shipping:
Calculated at Checkout

Oh Dear! This item has been sold but take a look around for other similar items

Complete module WORKING RF PA Output removed from an FM828 - classic OLD communications equipment.

Get yourself a low level exciter or sig gen source signal in the intended Low VHF frequency range, pump it into this PA Module (within the design frequency range) and you have 25W RF output into 50 Ohm.

Perfect to repurpose for that nice little FM transmitter (or single channel/repeater transceiver) project on 6 metres.

Many many forums, discussion groups talk about using these highly reliable FM828's on Amateur Radio 6m bands

I have some other FM828 series components, boards etc HERE - time to do some experimentation with this nice old analog communications technology!

 

PHILIPS - RF PA Output Module

Type: FM828 E Band (Mk2)

68Mhz ~ 88Mhz design frequency range

Dimensions: 179mm length x 50mm height x 79mm deep

Complete PA Board, mounting on the generous diecast heatsink which allows full output in environments up to 60C

Antenna mismatch protection circuits are not required or needed with this design

BNC input/output female socket

TX/RX relay switching incorporated on the PCB

All signals, power and control signals accessible via the side mounted feed-through pins

 

Checked prior to removing from a working transceiver which had other issues making it a "organ donor" for other purposes.

 

PA Module can use 10.8 to 13.8V DC supply

TX/RX relay (98927) is designed to be switched with 9.7V

PA input requires 30mW (50 Ohm) from the supplied exciter or signal generator source

Runs three Class C stages, finally ending up with 25W RF output into 50 Ohms

RF power transistors used BLY87A, BLY89A

 

Not shown in the photograph is the topside "lid" - I will be supplying that lid along with the 4x screws so that the whole unit is fully enclosed/RF shielded.

 

Tested as described in the description This item is not returnable, UNLESS dead on arrival