The ECC85 is a dual-triode tube optimized for VHF RF applications, most notably FM radio front-end circuits. With one section typically used as an RF amplifier and the other as a local oscillator, it provides low-noise, high-frequency amplification in a compact dual-triode package.
Function : Double triode, Electron tube
Package: Triode Type
Manufacturer: Telefunken, Philips, RCA
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Description
The device is a double triode vacuum tube (dual triode) primarily used in RF applications, especially VHF FM tuner front ends. Each triode section in the ECC85 is designed for high-frequency amplification and oscillator applications, making it ideal for FM radio receivers.
Double TRIODE for use as R.F. amplifier and self oscillating mixer. Miniature types used as rf amplifier and self-oscillating mixer in FM / AM radio receivers.
1. Heating : indirect by A.C. or D.C. ; parallel supply
Pinout
| Pin |
Function |
| 1 |
Not connected |
| 2 |
Anode (Triode 1) |
| 3 |
Grid (Triode 1) |
| 4 |
Heater |
| 5 |
Heater |
| 6 |
Grid (Triode 2) |
| 7 |
Anode (Triode 2) |
| 8 |
Cathode (both triodes common) |
| 9 |
Not connected / optional internal connection |
Features
1. Heater: 6.3 V, 300 mA (series heater, parallel possible in some configurations)
2. Base: Noval 9-pin (B9A)
3. Frequency range: Typically up to 150 MHz, optimized for VHF FM band (88–108 MHz)
Applications
1. FM Radio Front-End
2. VHF Preamplifier
3 Mixer Stage
ECC85 Datasheet PDF
