2 layers160 × 100 mm
RegenerativeRadio
cbaurtx/TubeRadio
To get the calculted inductance of 20µH the input tank coil we need this air coil:
34 parts
2 layers160 × 100 mm
RegenerativeRadioPowerSupply
cbaurtx/TubeRadioTo get the calculted inductance of 20µH the input tank coil we need this air coil:
- Size
- 160 × 100 mm
- Copper layers
- 2
- Thickness
- 1.6 mm
- Parts
- 35
- Nets
- 22
- Pads
- 83
- Tracks, vias
- 150, 1
- Routed
- Yes
- KiCad
- KiCad 9.0 (file 20241229)
- Created
- 16 May 2025
- Updated
- 3 Jun 2025
Overview
RegenerativeRadioPowerSupply is an open-source printed circuit board by cbaurtx, from the cbaurtx/TubeRadio repository on GitHub. It is a 2-layer board of 160 × 100 mm with 35 parts on 22 nets, routed with 150 tracks and 1 via.
It is built around the LM317 and LM317HVT. Its parts include 9 capacitors, 6 diodes, 5 resistors, 3 connectors and 2 ICs.
Main components
2
LM317
SOT-223-40℃~+85℃@(Ta) 0.003%Vout 1 1.3V~37V 1A 40V 80dB@(120Hz) Adjustable Positive Short Circuit Protection、Thermal shutdown SOT-223 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSJSMSEMIVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
LM317HVT
TO-2200℃~+125℃@(Tj) 1 1.25V~57V 1.5A 60V 80dB@(120Hz) Adjustable Over Current Protection、Over Temperature Protection Positive TO-220 Voltage Regulators - Linear, Low Drop Out (LDO) Regulators ROHSTexas InstrumentsVoltage Regulators - Linear, Low Drop Out (LDO) Regulators
README
README.mdTubeRadio
Disclaimer
It is entirely your responsibility to comply with all applicable laws when possesing or operating this radio. It is entirely your responsibility to make sure the all circuits, including the powersupply are operated safely.
License
TubeRadio is covered by CERN-OHL-W (Weakly reciprocal) Refer to doc/LICENSE.md for the license text
Notes
Output Transformer
There is a DC bias flowing through the output transformer. To avoid magnetic saturation of the iron core the core needs a small paper/plastic gap (~0.1–0.3 mm) between E and I laminations of the E I core. Do not use a power transformer or an audio transformer or a push pull amplifier.
Anode Choke
Similar to the output transformer the anode choke L4 has a DC bias current. So this choke needs a similar air gap as the output transformer to avoid magnetic saturation of the iron core.
Input Tank and Tickler Coil
The target frequency range of this radio is from 1.50MHz to 4.25MHz. With a capacity of 70pF to 570pF we can calculate the inductance of the coil of the input tank.
f₀ = 1 / (2π × √(L × C))
f₀ is the resonance frequency in hertz (Hz)
L is the inductance in henrys (H)
C is the capacitance in farads (F)
To get the calculted inductance of 20µH the input tank coil we need this air coil:
| Entity | Value | Unit |
|---|---|---|
| Turns | 25 | # |
| Layers | 2 | # |
| Inner ø | 13 | mm |
| Wire ø | 0.9 | mm |
The antenna and the tickler coil both have 8 turns. The antenna coil is wound on top of the input tank coil and the tickler coil is side by side of the other coils at a distance of 10mm.
The design files are for KiCad version 9.
Parts
35| Qty | Value | Footprint | References |
|---|---|---|---|
| 6 | MountingHole_Pad | MountingHole:MountingHole_4.3mm_M4_DIN965_Pad_TopOnly | H1, H2, H3, H4, H5, H6 |
| 4 | 1N4004 | Diode_THT:D_DO-41_SOD81_P10.16mm_Horizontal | D3, D4, D5, D6 |
| 2 | 0.1µF | Capacitor_THT:C_Rect_L7.0mm_W2.0mm_P5.00mm | C2, C7 |
| 2 | 1µF | Capacitor_THT:C_Rect_L13.5mm_W5.0mm_P10.00mm_FKS3_FKP3_MKS4 | C4, C9 |
| 2 | 22µF | Capacitor_THT:CP_Axial_L18.0mm_D6.5mm_P25.00mm_Horizontal | C3, C8 |
| 2 | 270Ω | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P20.32mm_Horizontal | R2, R4 |
| 2 | 470µF 63V | Capacitor_THT:CP_Axial_L30.0mm_D15.0mm_P35.00mm_Horizontal | C5, C6 |
| 2 | B40C2300-1500B | Diode_THT:Diode_Bridge_15.1x15.1x6.3mm_P10.9mm | D1, D2 |
| 2 | Heatsink | cbaurtx:Heartsink_TO220_ver | HS1, HS2 |
| 1 | 0.3A | cbaurtx:Fuseholder_Cylinder-5x20mm | F1 |
| 1 | 1000µF | Capacitor_THT:CP_Axial_L30.0mm_D15.0mm_P35.00mm_Horizontal | C1 |
| 1 | 2.2kΩ | Potentiometer_THT:Potentiometer_ACP_CA14V-15_Vertical | R5 |
| 1 | 33Ω | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P20.32mm_Horizontal | R1 |
| 1 | 6.8kΩ | Resistor_THT:R_Axial_DIN0414_L11.9mm_D4.5mm_P20.32mm_Horizontal | R3 |
| 1 | H | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J2 |
| 1 | L | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J3 |
| 1 | LM317 | Package_TO_SOT_THT:TO-220-3_Vertical | U1 |
| 1 | LM317HVT | Package_TO_SOT_THT:TO-220-3_Vertical | U2 |
| 1 | Screw_Terminal_01x02 | TerminalBlock:TerminalBlock_bornier-2_P5.08mm | J1 |
| 1 | TRANSF3 | cbaurtx:Transmformer_220V-18V_18V_9V | TR1 |
More from cbaurtx/TubeRadio
1Similar boards
- 2 layers128 × 80 mm
- 2 layers180 × 110 mm
Live pa system
KawaiButa/speaker-diy
A complete, open-hardware engineering design for a DIY Active Stage Monitor Loudspeaker optimized for live vocal and acoustic guitar performance at indoor venues (1–2 m listening distance).
77 parts - 4 layers100 × 100 mm
- 2 layers108.7 × 79.2 mm
- 2 layers70 × 50 mm
S88iso
GBert/railroad
git clone https://github.com/arendst/Tasmota.git cd Tasmota git tag pio run
33 parts36 - 2 layers100 × 35 mm
Two comparator effect
cyberboy666/two_comparator_effect
analog video posterisation effect - adapted from a rob schafer design
34 parts15GPL-3.0 - 2 layers
Alim10o
acmo0/PedalBoard-Power-Supply-Diy
This is a description of pedalboard power supplies that I designed an made. I use this power supplies, they are fully working. Pay attention : they are made for 230VAC.
110 parts14GPL-3.0 - 2 layers32 × 42 mm
Questions
How big is the RegenerativeRadioPowerSupply PCB?
It measures 160 × 100 mm and has 2 copper layers, 1.6 mm thick.
What parts does the RegenerativeRadioPowerSupply use?
35 parts, built around the LM317 and LM317HVT. The full list of its parts is on this page, with links to each part's symbol and footprint where PCBKit's library has them.
Where can I download the RegenerativeRadioPowerSupply KiCad files?
From the cbaurtx/TubeRadio repository on GitHub, at the commit this page was made from: the board is RegenerativeRadioPowerSupply.kicad_pcb and its schematic RegenerativeRadio.kicad_sch. PCBKit opens the board in the browser, with nothing to install.
Can I use the RegenerativeRadioPowerSupply design in my own project?
Its repository states no licence, so its author keeps all rights: ask cbaurtx before reusing the design.