Top is 6U8,6GH8,ECF82. If want to try 6U8,6GH8,ECF82. Only plug it into the adapter. Bottom is 7199. Amplifier design use 7199. Trying different voice by tube with adapter. Needn't change amplifier anything.
eBay
Nosbound TUBE-T4C Mini Vacuum Tube Preamp HiFi Stereo Audio Preamplifier with Treble Bass Control
Aliexpress UK
7199 used Hammond Pentode/Triode tube used in Bogen, Sherwood and others. The triode section tests at 4000 microMhos. The bogey number (Average Mutual Conductance) is 2100 mMhos. The pentode section tests at 5000 mMhos.
eBay
PSVANE COSSOR 12AU7/ ECC82 Vacuum Tube Upgrade B749 ECC802 E88CC CV491 B329 Electronic Tube Amplifier
Aliexpress UK
Tested strong at 110/110 no leaks. Round halo. NOT amp tested.
eBay
PSVANE 845 PLUS Vacuum Tube Replace 845 A845 E-845 845-DG 845-TII 845-T 845-TA Electronic Tube Amplifier Kit DIY
Aliexpress UK
eBay
PSVANE 300B PLUS vacuum tube direct upgrade WE300B 300B 300B-N 300B-98 E-300B 300BT HIFI audio valve electronic tube amplifier
Aliexpress UK
Model: 7199. Model: 7199. - Product Type: Vacuum Tube. Type: Vacuum Tube. Key Features. Only the power-on operation has been checked (unless otherwise stated). This unit is being soldas-is in its current condition.
eBay
A80 300B class A tube amplifier double single sound channel left and right channel separation Vacuum tube amplifier
Aliexpress UK
We are based in Japan. For electrical products, check the manufacturer and the product and convert the voltage to the respective country. Please note that we offer many used products (100V) for sale that have been used in Japan. If you have any questions, please feel free to contact us. We plan to ship via FedEx or DHL. Please contact us as shipping costs may change in some cases. All items are shipped under DDU (delivery duty unpaid) conditions. This means import duties, sales tax and customs clearance fees are the responsibility of the buyer and must be paid in your country upon delivery. This notice only applies to items explicitly marked as "J.
eBay
AIYIMA Mini 6A2 Tube Preamp Amplifier Board Vacuum Tube Pre-Amplifier Bile Buffer Home Aduio AMP Speaker Sound Amplifier DIY
Aliexpress UK
We are located in Japan.For electrical products, check the manufacturer and product and convert to the voltage of each country.Please note that we have many second-hand products (100V) that were used in Japan for sale. If you have any questions, please feel free to contact us at any time.We plan to ship by FedEx or DHL.Please contact us as the shipping fee can be changed in some cases. -These charges are normally collected by the delivering freight (shipping) company or when you pick the item up - do not confuse them for additional shipping charges. All items are shipped under DDU (Delivered Duty Unpaid) terms. This means that import duties, VAT, and customs clearance fees are the buyer’s responsibility and must be paid upon delivery in your country. This notice applies only to items t.
eBay
FEIYUE PSVANE MARKII KT88-TII Classic Vacuum Tube Replaces KT88 KT120 6550 KT90 HIFI Audio Valve Tube Amplifier Matched Quad
Aliexpress UK
Genalex Gold Lion 12AU7 ECC82 B749 Vacuum Tube Upgrade ECC802 E82CC CV4003 HIFI Audio Valve Electronic Tube Amplifier
Aliexpress UK