?Art Dudley Says: More important, Ive listened to it for hours on end, and been thoroughly enchanted by this little amps performance every single time Ive powered it up. To think that so unique and musically superior a design, hand-built to such a high level of quality, I have changed the output tubes to 719930, extremely rare Bendix versions of the 5992. Brent Jesse notes: 5992. This is a military/industrial version of the 6V6GT, is probably the best sounding 6V6 tube you will ever get your hands on, and is rather rare. I have only seen versions made by Bendix, b... as well, or relabeled the Bendix military surplus tubes. The US Air Force was supplied these as spares from the Sperry Gyroscope Co, and they have the 5992 number taken off, and the Sperry part number on the base. I have even had stock of these with the National Electronics labels and 6V6GTA on the box and tube. These are real Bendix tubes, as Bendix Red Bank was the ONLY manufacturer of this incredible tube. These have rugged brown micanol bases, heavy glass, a short boxy black plate structure, three mica spacers and dual top mounted D getters. The brown bases can vary in color from beige down to rich mahogany and sometimes have varying shading on the same base. This is probably the ultimate holy grail tube to have in the 6V6 world, but their scarcity today keeps them in a fairly obscure corner of that world. Clients tell me these blow away even the NOS RCA blackplate greyglass tubes! They are indeed awesome, and will never be made again. All of these tubes glow blue inside and have slightly longer warm-up time than the 6V6GT, this is normal. All 4 tubes here shine bright blue and are the real McCoy. eBay price for them would be about $1000 for 4. Exxtremely clean. All tubes have been replaced with the original ones that Shindo used in the first version. Effective output power?12W in class A Input(RCA Pin Jack) ?Input sensitivity/Impedance?1V/100k?. ?Signal to Noise Ratio?-60dB. ?Frequency Response?20-30.000Hz. ?Power Consumption?80W. ?Power Requirement?AC 117V or 230V, 50/60Hz. ?Dimensions?W 250×H 160×D 320 mm. ?Tube complement?4×6V6. ?Weight?12.2kg.

?Art Dudley Says: More important, Ive listened to it for hours on end, and been thoroughly enchanted by this little amps performance every single time Ive powered it up. To think that so unique and musically superior a design, hand-built to such a high level of quality, I have changed the output tubes to 719930, extremely rare Bendix versions of the 5992. Brent Jesse notes: 5992. This is a military/industrial version of the 6V6GT, is probably the best sounding 6V6 tube you will ever get your hands on, and is rather rare. I have only seen versions made by Bendix, b... as well, or relabeled the Bendix military surplus tubes. The US Air Force was supplied these as spares from the Sperry Gyroscope Co, and they have the 5992 number taken off, and the Sperry part number on the base. I have even had stock of these with the National Electronics labels and 6V6GTA on the box and tube. These are real Bendix tubes, as Bendix Red Bank was the ONLY manufacturer of this incredible tube. These have rugged brown micanol bases, heavy glass, a short boxy black plate structure, three mica spacers and dual top mounted D getters. The brown bases can vary in color from beige down to rich mahogany and sometimes have varying shading on the same base. This is probably the ultimate holy grail tube to have in the 6V6 world, but their scarcity today keeps them in a fairly obscure corner of that world. Clients tell me these blow away even the NOS RCA blackplate greyglass tubes! They are indeed awesome, and will never be made again. All of these tubes glow blue inside and have slightly longer warm-up time than the 6V6GT, this is normal. All 4 tubes here shine bright blue and are the real McCoy. eBay price for them would be about $1000 for 4. Exxtremely clean. All tubes have been replaced with the original ones that Shindo used in the first version. Effective output power?12W in class A Input(RCA Pin Jack) ?Input sensitivity/Impedance?1V/100k?. ?Signal to Noise Ratio?-60dB. ?Frequency Response?20-30.000Hz. ?Power Consumption?80W. ?Power Requirement?AC 117V or 230V, 50/60Hz. ?Dimensions?W 250×H 160×D 320 mm. ?Tube complement?4×6V6. ?Weight?12.2kg.