Ten-Tec model 305 RS-232 Serial Level Converter for Argonaut II Model 535 & 536 NEW in Box

Write a Review

MPN:

305

Condition:

New

Shipping:

$8.00 (Fixed Shipping Cost)

Description

Description

Ten-Tec model 305 RS-232 Serial Level Converter for Argonaut II Model 535 & 536 NEW in Box

Ten-Tec Model 305 RS-232 Serial Level Converter (also referred to as RS-232 Serial Level Converter) is a vintage accessory from the early 1990s, specifically designed for the Argonaut II Model 535 transceiver (and potentially compatible with other early computer-controllable Ten-Tec rigs like the Paragon or early Jupiter series). It served as an interface adapter to convert the rig's TTL-level serial signals (common in older ham gear) to standard RS-232 voltage levels for direct connection to a PC serial port for computer control (CAT commands, logging software, rig control programs, etc.). This was before widespread USB adoption, so it bridged the gap for serial interfacing without needing external level shifters.Key Details and Specifications

Purpose: Level conversion from rig's TTL/CMOS serial output (typically +5V logic) to true RS-232 (±3–15V bipolar signaling) for reliable PC communication; bidirectional for rig control and possibly frequency/mode readout.
Compatibility: Primarily for Argonaut II Model 535 (mentioned explicitly in its documentation); may work with other Ten-Tec models having TTL serial ports (e.g., early computer-controlled rigs).
Connection: Likely a small inline box or cable adapter with DB-9 or DB-25 RS-232 on one side and appropriate connector (e.g., mini-DIN or proprietary) for the rig's accessory port.
Era: Early 1990s (around 1990–1993, tied to the Argonaut II release in 1991).
Build: Compact, passive or simple active circuit (probably with MAX232 or equivalent chip for level shifting); no longer produced, as modern USB-serial adapters or built-in USB on later rigs (e.g., Eagle, OMNI-VII) replaced such needs.