Get the “DCTriode” free PC app, more complete and powerful than the Web site
I maintain a Windows PC application “DCTriode”, freely available for download and usage (freeware license): more comfortable, more circuits, more tube models, more features than the Web version. Pure freeware, fully functional, without any advertisements, telemetry, spy or intentional virus-like functions.
You may download its user manual to figure out what are its features or see some screen copies
Online library | PC application | |
Circuits | 10 | 38 |
Triodes | ECC81 ECC82 ECC83 ECC88 | Small signal: ECC81 ECC82 ECC83 ECC85 ECC86 ECC88 ECC99 ECF80 ECF82 ECF83 ECF86 ECL80 ECL81 ECL82 ECL83 ECL84 ECL85 ECL 86 12AY7 Power: 300B 2A3 |
Pentodes, tetrodes | Small signal: EF86 Power: EL34 EL84 6V6 5881 6550 KT66 KT88 | |
Customise, create tube models | no | yes |
Display anode curves | basic | detailed |
Display µ gm ri | no | yes |
Display DC data | yes | yes |
Display stacked voltages | yes | yes |
Display DC loadline | no | yes |
Display AC gain and impedance | no | yes (not all solvers) |
Display frequency response | no | with Miller effect and stray capacitances (not all solvers) |
Single-ended power stage | no | yes |
Push-pull power stage | no | No time… maybe in 2025… |
Store and retrieve your circuits configurations | no | yes |
Store results for spreadsheet | no | yes |
Library visual interface | fixed | flat / tree |
PDF User Manual | no | yes |
Freeware license
DCTriode is a freeware: you may download and use it freely for an unlimited period of time. Meanwhile, you are not authorized to sell it. Its code remains proprietary.
Download it freely now
Download from https://tubes.astefo.com/install/dnld.php . Note that your browser may prevent you to download this MSI file, to “protect” you…
Last release #2.2 on November 2023
Available circuit solvers:
- Basic common cathode stage
- Phase inverter, self bias cathodyne
- Cathode follower, fixed bias
- Gain stage and DC-coupled cathode follower
- Phase inverter, fixed bias cathodyne
- Cascode
- Differential phase inverter, cathode bias
- Cascode SRPP
- Gain stages with direct coupling
- Differential phase inverter, constant current bias
- Dual triode mixer, balanced
- Dual triode mixer, asymmetrical
- Gain stage, constant current bias
- Gain stages with DC level shifting
- Differential phase inverter, long-tailed pair, cathode bias
- 2-triode serial voltage regulator
- 1-triode basic serial voltage regulator
- 1-triode shunt voltage regulator
- Three gain stages coupled by HV RC filters
- Two gain stages coupled by HV RC filters
- Double-cascode after “Aikido” circuit (tubecad.com)
- Cascode SRPP after phono preamp (tubecad.com)
- Push-pull amplifier with DC feedback (tubecad.com)
- SRPP headphone amplifier (after Tubecad.com)
- Basic current source
- Constant-Current-Draw-Amplifier (after Tubecad.com)
- Janus cascode shunt regulator (after Tubecad.com)
- Totem pole split load phase splitter (after Tubecad.com)
- Amplifier with AC local feedback anode to grid
- Mu-follower
- Cascode SRPP+
- Common-grid amplifier
- White cathode amplifier
- Half-mu stage
- Cathode-follower with current sink
- Pentode small-signal amplifier
- Single ended triode power stage
- Single ended tetrode / pentode power stage