JJ Electronic
Gain Matched Septet (7) JJ 12DW7 / ECC832 / 7247 Vacuum Tubes - Brand New
- SKU:
- NP107-7
- UPC:
- 721205483985
- MPN:
- Septet 12DW7
- Availability:
- Ships in 1 business day or less.
- Shipping:
- Calculated at Checkout
Description
Gain Matched Septet (7) JJ 12DW7 / ECC832 / 7247 Vacuum Tubes
JJ is an undisputed leader in modern vacuum tube manufacturing, and for good reason. In the preamp stage, their ECC832 (12DW7 / 7247) is an industry favorite, as it provides excellent sonic performance along with great build quality at a reasonable price point.
Testing and/or Matching
At VIVA TUBES, all of our customers get the same high standard of testing and matching. Some sellers charge more for premium matches but we believe all of our customers should get the same level of quality and service.
Tubes are tested and/or matched at full operating voltage with regulated power supply on a Maxi Matcher tester for general mutual transconductance (Gm). In addition, power tubes are tested/matched by plate current (Ip) and preamp tubes are tested/matched by gain. Rectifier tubes will be tested for emissions on a calibrated military grade tube tester.
Our goal is to match within 5% with an upper limit of 15% (15% is the industry limit to consider a set).
Hand written test data included.
Note that we do offer a few models which are tested & matched at the factory. They will be matched by the same parameters (Ip & Gm) but to the manufacturer's standards. Factory testing will be indicated in the item title and description.
Guarantee
We offer a minimum 90 day guarantee covering functional defects - including noise unless otherwise stated. The guarantee period begins the day you receive your order.
Additional Information
reverb_offers: |
off |
reverb_model: |
12DW7 ECC832 7247 |
reverb_condition: |
Brand New |
reverb_shipping_profile: |
$17.99 |
reverb_upc_does_not_apply: |
on |
Item Type: |
Vacuum Tubes |
Production Era: |
New/Current Production |