Vacuum Tube - 7025 / E83CC, Tube Amp Doctor, Premium Selected
The Tube Amp Doctor 7025 / E83CC Highgrade is the premium selection of the RT003 ECC83-Cz for V1 positions. This tube works exceptionally well in the V1 position of high gain amps, combo amps, and phono/audio-amps.
The Tube Amp Doctor 7025 / E83CC Highgrade is a miniature, high-mu twin triode with good gain, round deep bass, somewhat compressed mids and very smooth top end. Selected and recommended for guitar amps to smoothen up the tone or for HiFi to shape the body of sound more to “that” tube tone. Best for jazzy and thick clean as well as for vintage bass response. The TAD™ 7025 / E83CC Highgrade can replace any 7025, 12AX7WA, 12AX7WB, 12AX7LPS, 12AX7EH, ECC83 or E83CC.
Q: When does a preamp tube become a Premium Selected tube?
A: All preamp tubes labeled Premium Selected have passed the following tests:
- Low Noise Test
- Microphonic Test
- Gain Test
- Sonic Tests
- Shock Tests
- Listening Tests
- Balanced Output Test
| Approximate net weight | 13 g | ||
| Base | E9-1, Small Button 9 Pin | ||
| Cooling | conventional | ||
| Diameter | 22 mm | ||
| Heater Voltage (AC or DC) Parallel | 6.3 V +/-0.5 V | ||
| Heater Voltage (AC or DC) Series | 12.6 V +/-1.0 V | ||
| Height | 55.6 mm | ||
| Max.Bulb temperature (surface hottest point) | 160°C | ||
| Max. Cathode Current | 8 mA | ||
| Max. DC plate voltage | 300 V | ||
| Max. Negative DC Grid Voltage | -55 V | ||
| Max. Plate dissipation | :1.0 W | ||
| Max. Positive DC Grid Voltage | 0 V | ||
| Operating Position | Any | ||
| Seated height | 49.2 mm | ||
| Packaging Dimensions | 3.21 in. × 1.05 in. × 1.05 in. | ||
| Weight (Packaging) | 0.0309 lbs. | ||
 Datasheet | All Models |
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I've been rolling tubes for years. You can see many of my tube reviews here on Amplified Parts. I must admit I was pleasantly surprised with the TAD 7025's in my Black Ice Audio 3502S. Previously I'd been listening to mostly NOS preamp tubes. Unfortunately some of those preamp tubes became noisy or their triodes weren't balanced, gain issues, etc. I decided to give Tube Amp Doctor (TAD) a roll and sure glad I did. These are great tubes! I like them more than the last set of NOS 12AX7's (RFTs) I had been using. The TAD 7025's are very clear and powerful sounding, tight bass, nice smooth highs, great mids, a pleasure to listen to. Highly recommended!