Western Electric Vacuum tube VT25A , 10Y with ceramic base. Tested on several TV7 testers with similar results.

2x Air Ministry (A.M.) DET25 Valves Very rare and sweet sounding direct heated power amplifier triode, military grade Tested by AVO VCM Tester Valve 1 Ia = 27(mA), gm = 2.1(mA/V) Valve 2 Ia = 36(mA), gm = 2.2(mA/V) NOS specification: Ia = 26(mA), gm = 2.1(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20211101L012

Used Tube Amplifier VT25A 2.6 SQ Audio Equipment Amplifiers Very Rare ItemInternational Buyers - Please Note: Import duties, taxes, and charges are not included in the item price or shipping cost. These charges are the buyers responsibility. Please check with your countrys customs office to determine what these additional costs will be prior to bidding or buying.

2x Air Ministry (A.M.) DET25 Valves Very rare and sweet sounding direct heated power amplifier triode, military grade Tested by AVO VCM Tester Valve 1 Ia = 27(mA), gm = 2.1(mA/V) Valve 2 Ia = 36(mA), gm = 2.2(mA/V) NOS specification: Ia = 26(mA), gm = 2.1(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20211101L012

They Measured 108 and 98 on my TV-7, the minimum value is 38. No shorts. Botton D getter, brown base, black plate Please, pay attention to the shipping as my countrie is not sending packages to Russia, Ucraine, some Africa countries and Middle East. We are sending packages to: EUA, Germany, UK, China, France, Spain, Portugal, Canada, etc... Shipping USD 40.00

2x Air Ministry (A.M.) DET25 Valves Very rare and sweet sounding direct heated power amplifier triode, military grade Tested by AVO VCM Tester Valve 1 Ia = 27(mA), gm = 2.1(mA/V) Valve 2 Ia = 36(mA), gm = 2.2(mA/V) NOS specification: Ia = 26(mA), gm = 2.1(mA/V) *** This valve has also been tested in amplifier without any noise. *** Postage Costs I am happy to post this item to worldwide and combine postage cost on multiple purchases. 20211101L012

1 vintage Sylvania VT-25A 10Y tube -tested- 10 VT25 Click image to enlarge Description single vintage sylvania vt-25A tube brown base - black plates - spring loaded filaments - dimpled foil getter tested on my Amplitrex AT-1000 mutual conductance tube tester no gas, shorts or leakage average new for this type is 1300 tested @ 1200 6.1madc       Images sell! Get Supersized Images & Free Image HostingCreate your brand with Auctivas Customizable Templates. Attention Sellers - Get Templates Image Hosting, Scheduling at Auctiva.com. Track Page Views WithAuctivas Counter