Brand new (gold feet) WF EF861 electronic tube upgrade 6J9 6688 6j9 The sound quality is full and sweet, precise pairing. - AliExpress
6688, Tube 6688; Röhre 6688 ID19673, Vacuum Pentode | Radiomuseum.org
6688/E180F line stage? | diyAudio
Tubes-Store.com → Other tubes → 6J11P-E / E180F / 6688 tube
General Electric 6688 5 Star Vacuum Tube New Old Stock - Etsy
6688 Good Feng Shui!" Headphone Amplifier - diyparadise
Amperex 6688 Vintage Electron Tube w/ Gold pins, Strong | eBay
1 X 6688 GENERAL ELECTRIC TUBE. 1970s PROD. 14. CE808 | eBay
One 6688 Tube, By G.E., Gold Pin, New | eBay
Tubes-Store.com → Other tubes → 6J9P-E / E180F / 6688 tube
Mullard E180F / 6688 Tube (1) | eBay
E180F / 6688 GOLD PIN Philips
GE 6688 VACUUM TUBE NOS & TESTED | eBay
6J11P-E | Tube HF Pentode Equivalent: E180F / 6688 | Soviet-Tubes
6688 / E180F
TUBE E180F: Electron tube, pentode, Noval, 9-pin, 6.3 V at reichelt elektronik
1 X 6688 GENERAL ELECTRIC TUBE. 1970s PROD. 14. CE808
NOS Tube Store: Amperex JAN CEP 6688 / E180F
300B schematic recommendations | diyAudio
1PCS New American 6688 tube upgrade 6J9/6m9/EF180/E180F/6J9 tube
Tube NOS Mullard E180F/CV3998/6688 — Parts Connexion
![GE 6688 (E180F) Electron Tube "Made In The USA" 5960-00-820-8717 | eBay](https://i.ebayimg.com/images/g/btYAAOSwPB9dSLiH/s-l1200.webp "GE 6688 (E180F) Electron Tube "Made In The USA" 5960-00-820-8717 | eBay")
GE 6688 (E180F) Electron Tube "Made In The USA" 5960-00-820-8717 | eBay
Amperex E180F 6688 Holland: Vacuum Tubes & NOS Tubes | Tubes Unlimited
