PC-20

The Dynaco PC-20 FM-5 circuit board is a vital component for audio enthusiasts and electronics hobbyists seeking to restore or build a high-performance FM stereo receiver. This particular circuit board is specifically designed for the Dynaco PAS-20-S and PAS-20-FX stereo amplifier models, which were renowned for their superior sound quality during the 1960s and 1970s.

This circuit board, the FM-5, is responsible for handling the FM tuner section of your Dynaco amplifier. It features a tuned radio frequency (TRF) design, which was a popular method for FM tuning in the mid-20th century due to its excellent selectivity and sensitivity. The FM-5 circuit board includes all the necessary components for FM tuning, such as diode detectors, varicap tuning diodes, and resistors.

The board is constructed using high-quality FR-4 epoxy fiberglass material, ensuring durability and excellent thermal stability. Measuring approximately 14 inches by 10 inches (35.6 cm by 25.4 cm), the board has a generous layout, making it easy for users to work on and modify. The component side of the board is densely populated with through-hole components, allowing for easy identification and replacement.

The reverse side of the board is meticulously designed with a clear and organized layout of power and signal routing. Copper traces of various widths are used to ensure optimal current flow and signal integrity. The board also features multiple test points and access holes for troubleshooting and servicing purposes.

In summary, the Dynaco PC-20 FM-5 circuit board is an essential addition for those looking to restore or build a classic Dynaco PAS-20-S or PAS-20-FX FM stereo receiver. Its high-quality construction, TRF design, and generous layout make it a reliable and user-friendly option for audio enthusiasts and electronics hobbyists alike.

The Dynaco PC-20 FM-5 circuit board is a popular choice among audio enthusiasts for building or restoring Dynaco's iconic ST-70 and SX-32 power amplifiers. Here are some pros and cons to consider before purchasing this circuit board.

1. Authenticity: The Dynaco PC-20 FM-5 circuit board is an exact replica of the original circuit board used in Dynaco's classic amplifiers, ensuring a faithful reproduction of the original sound.

2. Availability: The PC-20 FM-5 circuit board is widely available from various retailers, making it a convenient option for those looking to build or restore their amplifiers.

3. Quality: The circuit board is made with high-quality components, ensuring reliable operation and long-lasting performance.

4. Improved reliability: The PC-20 FM-5 circuit board includes some improvements over the original design, such as the use of modern capacitors, which can help improve the reliability of the amplifier.

5. Cost-effective: Building or restoring an amplifier using the PC-20 FM-5 circuit board can be a cost-effective alternative to purchasing a new amplifier.

1. Complexity: Building or restoring an amplifier using the PC-20 FM-5 circuit board requires some technical knowledge and skills, which may be a deterrent for some users.

2. Time-consuming: The process of building or restoring an amplifier using the PC-20 FM-5 circuit board can be time-consuming, especially for those who are new to the process.

3. Risk of damage: There is a risk of damaging the circuit board or other components during the building or restoration process, which could result in additional costs and delays.

4. Compatibility issues: The PC-20 FM-5 circuit board may not be compatible with all versions of the ST-70 and SX-32 amplifiers, so it is essential to ensure that it is the correct board for your specific model.

5. Limited customization: Since the circuit board is an exact replica of the original design, there is limited room for customization.

The Dynaco PC-20 FM-5 circuit board is an excellent option for those looking to build or restore a classic Dynaco amplifier while ensuring authenticity and reliability. However, it requires some technical knowledge and skills, and the process can be time-consuming and complex. Ultimately, the decision to purchase the circuit board depends on your experience level, budget, and desired level of customization.

If you are a seasoned audio enthusiast with the necessary skills and experience, the Dynaco PC-20 FM-5 circuit board is an excellent choice for building or restoring a classic Dynaco amplifier. However, if you are new to the process or looking for more customization options, it may be worth considering a kit or pre-built amplifier instead. Additionally, ensure that you order the correct circuit board for your specific amplifier model to avoid compatibility issues.

Details:

Unit not plugged into wall socket.

specifications stereocompo:

• brand: Dynaco
• mpn: Pc-20
• type: Pc Board

shipping stereocompo:

• transit: 3-10 days
• carrier: usps
• class: standard
• service: usps ground advantage
• type: fixed

returns stereocompo:

• policy: returns accepted
• paid by: buyer
• method: money back
• time: 30 days

offer stereocompo:

• availability: in stock
• price: $35.00
• item condition: For parts or not working
• sold #: 9
• started: december 17, 2025
• in stock #: 1
• options: ship-to-home

seller stereocompo:

• # reviews: 3997
• rating: 100.0%
• city: houston, texas

payments stereocompo:

• other
• credit card: mastercard
• wallet: paypal

general stereocompo:

• category: Electronics > Audio > Home Stereo Components