![VACUUM CONVERTER SOCKET ADAPTER 8pin to 4pin 4pin to 8pin Tin plated for 5Z3 to 274B Vacuum tube HiFi Guitar audio amplifier 1PC VACUUM CONVERTER SOCKET ADAPTER 8pin to 4pin 4pin to 8pin Tin plated for 5Z3 to 274B Vacuum tube HiFi Guitar audio amplifier 1PC](https://ae01.alicdn.com/kf/H0fdfe5e8a76946a1b58b3f863177ab4cf/VACUUM-CONVERTER-SOCKET-ADAPTER-8pin-to-4pin-4pin-to-8pin-Tin-plated-for-5Z3-to-274B.jpg)
VACUUM CONVERTER SOCKET ADAPTER 8pin to 4pin 4pin to 8pin Tin plated for 5Z3 to 274B Vacuum tube HiFi Guitar audio amplifier 1PC
![7A8 Octode Converter Tube. Designed to perform the combined functions of the oscillator and mixer in superheterodyne receivers. MFR: Sylvania. SKU: 7A8. New old stock. No longer available for export. 7A8 Octode Converter Tube. Designed to perform the combined functions of the oscillator and mixer in superheterodyne receivers. MFR: Sylvania. SKU: 7A8. New old stock. No longer available for export.](https://media.rfparts.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/7/a/7a8_jan-chs-sylvania_1.jpg)
7A8 Octode Converter Tube. Designed to perform the combined functions of the oscillator and mixer in superheterodyne receivers. MFR: Sylvania. SKU: 7A8. New old stock. No longer available for export.
![12SY7 Pentagrid Converter Tube. Designed to operate as a converter in AC/DC amplifiers. MFR: RCA. SKU: 12SY7. New old stock. No longer available for export. 12SY7 Pentagrid Converter Tube. Designed to operate as a converter in AC/DC amplifiers. MFR: RCA. SKU: 12SY7. New old stock. No longer available for export.](https://media.rfparts.com/media/catalog/product/cache/1/image/9df78eab33525d08d6e5fb8d27136e95/1/2/12sy7-jan-crc_rca_1.jpg)
12SY7 Pentagrid Converter Tube. Designed to operate as a converter in AC/DC amplifiers. MFR: RCA. SKU: 12SY7. New old stock. No longer available for export.
![Amazon.com: 12AX7 ECC83 12AU7 ECC82 12AT7 ECC81 7025 Replace 6N2 6N6 6DJ8 Tube Socket Adapter HIFI Amp Valve Converter : Musical Instruments Amazon.com: 12AX7 ECC83 12AU7 ECC82 12AT7 ECC81 7025 Replace 6N2 6N6 6DJ8 Tube Socket Adapter HIFI Amp Valve Converter : Musical Instruments](https://m.media-amazon.com/images/I/61h4HvREN6L.jpg)
Amazon.com: 12AX7 ECC83 12AU7 ECC82 12AT7 ECC81 7025 Replace 6N2 6N6 6DJ8 Tube Socket Adapter HIFI Amp Valve Converter : Musical Instruments
![HIFI WE274A 5Z3 80 To WE274B 5U4G 5AR4 5Z4P Vacuum Tube Adapter Converter Black – ASA College: Florida HIFI WE274A 5Z3 80 To WE274B 5U4G 5AR4 5Z4P Vacuum Tube Adapter Converter Black – ASA College: Florida](https://i.ebayimg.com/images/g/gsAAAOSwD35ie7vU/s-l1600.jpg)