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Sovtek EL84M / 6BQ5WA - precision matched
The Sovtek EL84M / 6BQ5WA tube is a military spec EL84 / 6BQ5 tube type. Its extended voltage range, improved plate dissipation, and rugged construction enable it to withstand higher plate current than other new production EL84 tube types and make it a suitable replacement for 7189 tubes.
These
tubes have been burned in, tested at typical operating voltages on a
laboratory grade Amplitrex AT1000, and precisely matched for both
current draw (mA) and transconductance (Gm). Learn more about our burn-in and testing process here.
Price is for a single tube and includes burn-in and standard matching service. Tubes ship in Sovtek retail boxes.
HIGHER VOLTAGE AMPLIFIERS--PLEASE NOTE
Many tube amplifiers run 6BQ5 / EL84 tube types over the
specified maximum plate voltage ratings provided in manufacturer data
sheets. This is not really a problem as long as the tubes are well
matched at the actual operating voltages.
As you push a tube beyond its
design limits, it increases the tube’s sensitivity to changes in the
operating conditions. This means that tubes matched at 250v (plate) and
250v (screen) cannot be expected to match at 320v (plate) and 320v
(screen) (these specs are the operating voltages of the Orange Tiny
Terror and Vox AC30 amps). So we now offer the choice to pick tubes
matched at these higher voltages.
If your amp has plate voltages higher than 320V, we recommend choosing the custom matching option to be sure your tubes will last
as long as possible.
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Precision Power Tube Matching
Our power tubes are burned in for 48 hours and tested on a laboratory grade Amplitrex AT1000 tube tester. We match tubes for both current draw (mA) and transconductance (Gm) at typical operating conditions (see #3 below) for no extra charge. We can also custom match power tubes at whatever specifications you provide (see #4 below).
The questions listed below allow you to provide optional information about your operating conditions that will help us select the best matched set of power tubes for your amplifier.
Why this matters
1. What is the manufacturer and model of your amplifier?
2. How is your amp biased? Why we ask
3. Which specifications are closest to your amp's operating conditions? Why we ask
4. CUSTOM MATCHING ONLY: If you chose "Custom Match" above, please enter the power tube specifications for your amp
CAUTION
5. Feel free to provide more information (for example, guitarists may want to specify early or late breakup) in the comments section when you check out. Thank you!
Price per single tube: $14.50
Sale Price: $11.60
You Save: $2.90 (20 %)
Enter total number of tubes needed for your matched set
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TC Tubes specializes in precision testing and matching of vintage and new production vacuum tubes for guitar & bass players, audiophiles, and DIY tube audio enthusiasts. Our website features secure payment options and fast, convenient shipping around the world.
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