![PREFERRED_LOW_LEVEL_COMMON_PLATE_MIXER - Electrical_Equipment_Circuit - Circuit Diagram - SeekIC.com PREFERRED_LOW_LEVEL_COMMON_PLATE_MIXER - Electrical_Equipment_Circuit - Circuit Diagram - SeekIC.com](http://www.seekic.com/uploadfile/ic-circuit/2009723232334852.gif)
PREFERRED_LOW_LEVEL_COMMON_PLATE_MIXER - Electrical_Equipment_Circuit - Circuit Diagram - SeekIC.com
![RAYTHOEN 12AT7 vacuum tube replaces ECC81/6021/ECC801 to provide pairing for tube amplifier and sound amplifier NOS - AliExpress RAYTHOEN 12AT7 vacuum tube replaces ECC81/6021/ECC801 to provide pairing for tube amplifier and sound amplifier NOS - AliExpress](https://ae01.alicdn.com/kf/S3c8dacf0f02246abb682b25d46955d67d/RAYTHOEN-12AT7-vacuum-tube-replaces-ECC81-6021-ECC801-to-provide-pairing-for-tube-amplifier-and-sound.jpg_.webp)
RAYTHOEN 12AT7 vacuum tube replaces ECC81/6021/ECC801 to provide pairing for tube amplifier and sound amplifier NOS - AliExpress
![6021 Sylvania Medium Mu Twin Triode Tube. Designed for use as an amplifier in high and UHF circuits. New old stock. No longer available for export. MFR: Sylvania. SKU: 6021. 6021 Sylvania Medium Mu Twin Triode Tube. Designed for use as an amplifier in high and UHF circuits. New old stock. No longer available for export. MFR: Sylvania. SKU: 6021.](https://media.rfparts.com/media/catalog/product/6/0/6021.jpg)
6021 Sylvania Medium Mu Twin Triode Tube. Designed for use as an amplifier in high and UHF circuits. New old stock. No longer available for export. MFR: Sylvania. SKU: 6021.
![But being as this is a 7550 dual triode, the most powerful subminiature tube in the world… - Effectrode But being as this is a 7550 dual triode, the most powerful subminiature tube in the world… - Effectrode](https://www.effectrode.com/wp-content/uploads/2016/12/159_7550_and_6021_tubes_960px.jpg)