
Silent key K2TML my dad, i was a ham
license expired.I have 30 years in
electronics. local pickup 07834 or buyer
pays ship, paypal or zelly. no cables or ps included $75
Overall Dimensions (maximum, w/o cables) 1.5" H x 10.75" W x 5.75" D
Weight (without AC adapter) 19 oz.
AC Power requirements (with supplied AC adapter) 120 Vac -120 dB
PTT max contact rating 2A @ 24V or 1A @ 48V
CW direct keying ratings Transistor logic only, tube amps not supported. Positive pull down .15V min. @ 20 ma. max
FSK direct keying ratings Transistor logic only, tube amps not supported. Positive pull down .15V min. @ 20 ma. max
Serial interface ports A,B (DB9F connector) Standard RS232
RS232 Pin Assignments Serial A (DB9 PC signal set)
Pin 2 Receive Data (Rig control default)
Pin 3 Transmit Data (Rig control default or FSK option)
Pin 4 Data Terminal Ready (CW Keying control)
Pin 5 Signal Ground (isolated digital common)
Pin 6 Data Set Ready (PTT interrupt)
Pin 7 Request To Send (PTT control)
Pin 8 Clear To Send (PTT interrupt)
RS232 Pin Assignments Serial B (DB9 PC signal set)
Pin 2 Receive Data (Rig control option or pass)
Pin 3 Transmit Data (Rig control option or pass FSK option)
Pin 5 Signal Ground (isolated digital common)
TTL rig control interface ports (dual circuit mini jack connector) Standard TTL 5V logic, selectable bi-directional or unidirectional
The microphone audio is completely isolated from all other grounds. The three sound card audio signals are isolated using three audio transformers. The computer is isolated using, three DPDT relays, three opto-isolators and a isolating DC to DC converter. A high grade DC blocking capacitor is on the sound card to mic. output for use with radios that are designed for use with amplified or electret microphones.
The relays provide adequate current and voltage capability to switch tube rigs. The relays also provide automatic switching between sound card audio, transmit muting and our mic. override and mic. interrupt features.
Specifications
Overall Dimensions (maximum, w/o cables) 1.5" H x 10.75" W x 5.75" D
Weight (without AC adapter) 19 oz.
AC Power requirements (with supplied AC adapter) 120 Vac -120 dB
PTT max contact rating 2A @ 24V or 1A @ 48V
CW direct keying ratings Transistor logic only, tube amps not supported. Positive pull down .15V min. @ 20 ma. max
FSK direct keying ratings Transistor logic only, tube amps not supported. Positive pull down .15V min. @ 20 ma. max
Serial interface ports A,B (DB9F connector) Standard RS232
RS232 Pin Assignments Serial A (DB9 PC signal set)
Pin 2 Receive Data (Rig control default)
Pin 3 Transmit Data (Rig control default or FSK option)
Pin 4 Data Terminal Ready (CW Keying control)
Pin 5 Signal Ground (isolated digital common)
Pin 6 Data Set Ready (PTT interrupt)
Pin 7 Request To Send (PTT control)
Pin 8 Clear To Send (PTT interrupt)
RS232 Pin Assignments Serial B (DB9 PC signal set)
Pin 2 Receive Data (Rig control option or pass)
Pin 3 Transmit Data (Rig control option or pass FSK option)
Pin 5 Signal Ground (isolated digital common)
TTL rig control interface ports (dual circuit mini jack connector) Standard TTL 5V logic, selectable bi-directional or unidirectional
The microphone audio is completely isolated from all other grounds. The three sound card audio signals are isolated using three audio transformers. The computer is isolated using, three DPDT relays, three opto-isolators and a isolating DC to DC converter. A high grade DC blocking capacitor is on the sound card to mic. output for use with radios that are designed for use with amplified or electret microphones.
The relays provide adequate current and voltage capability to switch tube rigs. The relays also provide automatic switching between sound card audio, transmit muting and our mic. override and mic. interrupt features.