ATTENUATOR / TRANSVERTER INTERFACE BOARD
15 USD SHIPPED ONLY !!
Latest Boards go in Blue color !
This Transverter Interface & Attenuator board allows you to interface your base HF radio to the VHF/UHF Transverter. This board contains 30 dB Attenuator with the fine output power adjustment POT and the BYPASS / PTT relays.
When the Power Switch is in OFF position the Attenuator Board is set in HF BYPASS mode. HF antenna is connected to your base HF radio through the bypass relay contacts K1 and K3. You can operate on HF bands with full 100 watts ouput power of your base HF radio.
!!!! - BEFORE SWITCHING IT TO THE TRANSVERTER OPERATION MODE TO SET OUTPUT POWER OF YOUR BASE HF RADIO TO 5-10 W - !!!!
To get it working in the VHF TRANSVERTER mode to switch +12V Power Switch ON. Now your HF antenna is cut off from your HF radio by K2 contacts of the relay and your VHF Transverter setting in RX mode is connected through the K3, K2, K1 contacts of the relays to your base HF radio. Connecting PTT line to the GROUND brings your VHF Transverter into TX mode connecting its IF input through the ATTENUATOR to the output of your base HF Radio.
Download a copy of the manual there
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