Batboard

I opened up my r1225 repeater and found the model number on the Celwave duplexer RFE4000A. This does not match up with any Celwave products that I could find. I am looking for specs on it.

Mark

emtprt wrote:I opened up my r1225 repeater and found the model number on the Celwave duplexer RFE4000A. This does not match up with any Celwave products that I could find. I am looking for specs on it.

Mark

RFE4000A is the Motorola Part number for:

PD6336A2N UHF DUPLEXER 450-470MHZ

633-6A-2 (450-470 MHz)
633-6A-2BNB
633-6A-2N

Type: 4 capacitively tuned TEM resonators

Minimum freq. spacing 5 MHz
Insertion loss 1.4 dB
Max. continuous power 50 watts
Tx noise supp. at Rx freq. 75 dB
Rx isolation at Tx freq. 75 dB
Temperature range -30 to +60C
VSWR 1.3:1

Butch

I happen to actually have a CELWAVE RFE 4000A in front of me. It is a 6 cavity UHF duplexor. I can't find any data on it, so i'm assuming it's a reject type as oppsed to band pass/band reject.

Accually they are SIX capacitively tuned TEM resonators. Not really a cavity per say. Most of these type of duplexers are reject/reject. One set of three resonators 'notches out' the transmitter and passes the receive, other side 'notches out' the receiver from the transmitter path.