MFJ-1708B
RF Sensing Tx/Rx Switch
Description
1708B
RF Sensing Tx/Rx Switch
Enjoy using vintage tube type separate transmitters and receivers? It was a real chore to switch your antenna from transmit to receive and back -- it still is!
Automatic Tx/Rx switch senses transmitted RF and switches your antenna from receive to transmit using a relay.
It shorts your receiver antenna input to ground to protect your receiver. It also provides an auxiliary contact closure to ground during receive (opened in transmit) for an "On-the-Air" sign or other use.
Instead of using RF sense to switch the antenna, a control line input lets your key/keyer or PTT line switch the antenna.
- An adjustable time delay circuit gives you delayed switching.
- Works on all modes -- CW, AM, SSB, FM, and digital modes.
- Power rating 200W SSB PEP.
- Size 4 W x 2 5/8 H x 1 1/2 D inches.
- SO-239 coax connectors for antenna, transmitter, and receiver.
- Control input, auxiliary contact closure to ground, time delay screwdriver adjustment, power jack.
- Requires 12 VDC
- Over 20,000 items in stock!
- Fast dispatch of stock items
- Trading for over 50 years
- Price pledge promise