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Electro-Harmonix

New Matched Quad (4) Electro-Harmonix 300B Gold Pins Ceramic Vacuum Tubes

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SKU:
NP055-4
UPC:
610370783788
MPN:
Quad 300B
Availability:
Ships in 1 business day or less.
Shipping:
Calculated at Checkout
$499.36

Description

New Factory Tested & Matched Quad of Electro-Harmonix 300B Gold Pins Ceramic Vacuum Tubes

Ultra-long life, high-quality construction, and superior sonics with improved performance make it a top choice over 300B types made by other manufacturers. Like the original Western Electric 300B, it has the eight course, directly heated filament, 40 Watt plate dissipation, classic large-shoulder tube glass, and is available singly or in precision matched pairs. The 300B EH's plate curves and static DC characteristics (plate resistance, transconductance) also exactly match the originals for superior performance in any vintage or modern 300B amplifier. These are tested by the factory themselves.

Will work in place of: 300B, WE300B, 4300A, CV2609, 300A

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.

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Additional Information

reverb_offers:
off
reverb_model:
300B
reverb_condition:
Brand New
reverb_shipping_profile:
$29.99
reverb_upc_does_not_apply:
on
Item Type:
Vacuum Tubes
Production Era:
New/Current Production
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