Vacuum Tube - 5881, JJ Electronics
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Starting at: $25.50
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The JJ Electronic 5881 is very similar to the 6L6GC but with a plate dissipation of 23W rather than 30W. Another physical difference is the shorter bulb. These tubes have a soft and balanced response that sounds great in both guitar amps and hifi equipment. The JJ 5881 will work in any amp that uses 6L6 tubes.
Matched versions of this tube use Apex Matching
RoHS Compliant
Accessory Items:
| Single or Matched | Our Part Number | UPC/EAN |
|---|---|---|
| Single | T-5881-JJ | 841358101618 |
| Apex Matched Pair | T-5881-JJ-MP | 841358101625 |
| Apex Matched Quad | T-5881-JJ-MQ | 841358101632 |
| Body Height | 82.0 mm | ||
| Filament Current (If) | 0.9 A | ||
| Filament Voltage (Uf) | 6.3 V | ||
| Grid 1 Voltage (ug1) | -14 V typical | ||
| Grid 2 voltage (Ug2) | ≤ 450 V, 250 V typical | ||
| Grid Circuit Resistance (Rg), Fixed Bias | 0.1 MΩ | ||
| Grid Circuit Resistance (Rg), Self Bias | 0.5 MΩ | ||
| Item Diameter | 38 mm | ||
| Item Height | 96.5 mm | ||
| Plate Current (Ia) | 63 mA | ||
| Plate Dissipation (Wa) | ≤ 26 W | ||
| Plate Resistance (Ra) | 2.5 kΩ | ||
| Plate Voltage (Ua) | ≤ 450 V, 250 V typical | ||
| Packaging Dimensions | Apex Matched Pair version | T-5881-JJ-MP | 1.6 in. × 3.2 in. × 4.5 in. |
| Apex Matched Quad version | T-5881-JJ-MQ | 3.2 in. × 3.2 in. × 4.5 in. | |
| Single version | T-5881-JJ | 1.6 in. × 1.6 in. × 4.5 in. | |
| Weight (Packaging) | Apex Matched Pair version | T-5881-JJ-MP | 0.2602 lbs. |
| Apex Matched Quad version | T-5881-JJ-MQ | 0.5204 lbs. | |
| Single version | T-5881-JJ | 0.1301 lbs. |
| T-5881-JJ-MP - Apex Matched Pair version | Body Height | 82.0 mm |
| Filament Current (If) | 0.9 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid 1 Voltage (ug1) | -14 V typical | |
| Grid 2 voltage (Ug2) | ≤ 450 V, 250 V typical | |
| Grid Circuit Resistance (Rg), Fixed Bias | 0.1 MΩ | |
| Grid Circuit Resistance (Rg), Self Bias | 0.5 MΩ | |
| Item Diameter | 38 mm | |
| Item Height | 96.5 mm | |
| Plate Current (Ia) | 63 mA | |
| Plate Dissipation (Wa) | ≤ 26 W | |
| Plate Resistance (Ra) | 2.5 kΩ | |
| Plate Voltage (Ua) | ≤ 450 V, 250 V typical | |
| T-5881-JJ-MQ - Apex Matched Quad version | Body Height | 82.0 mm |
| Filament Current (If) | 0.9 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid 1 Voltage (ug1) | -14 V typical | |
| Grid 2 voltage (Ug2) | ≤ 450 V, 250 V typical | |
| Grid Circuit Resistance (Rg), Fixed Bias | 0.1 MΩ | |
| Grid Circuit Resistance (Rg), Self Bias | 0.5 MΩ | |
| Item Diameter | 38 mm | |
| Item Height | 96.5 mm | |
| Plate Current (Ia) | 63 mA | |
| Plate Dissipation (Wa) | ≤ 26 W | |
| Plate Resistance (Ra) | 2.5 kΩ | |
| Plate Voltage (Ua) | ≤ 450 V, 250 V typical | |
| T-5881-JJ - Single version | Body Height | 82.0 mm |
| Filament Current (If) | 0.9 A | |
| Filament Voltage (Uf) | 6.3 V | |
| Grid 1 Voltage (ug1) | -14 V typical | |
| Grid 2 voltage (Ug2) | ≤ 450 V, 250 V typical | |
| Grid Circuit Resistance (Rg), Fixed Bias | 0.1 MΩ | |
| Grid Circuit Resistance (Rg), Self Bias | 0.5 MΩ | |
| Item Diameter | 38 mm | |
| Item Height | 96.5 mm | |
| Plate Current (Ia) | 63 mA | |
| Plate Dissipation (Wa) | ≤ 26 W | |
| Plate Resistance (Ra) | 2.5 kΩ | |
| Plate Voltage (Ua) | ≤ 450 V, 250 V typical |
 Specification Sheet | All Models |
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Product Reviews
This replaced a JJ 6L6GC in the (single-ended) power section of an Allen Chihuahua guitar amp. The reason for the change is a bit off-the-wall, in that the 6L6GC was working fine, but a cabinet / reverb tank reconfiguration didn't leave enough room for the 6L6GC. (Deal with that later.) I had been wanting to try a 6V6GT in that position, which would have required modifying the cathode bias. The 5881 is supposed to be electrically equivalent to the 6L6GC, except for having lower max. plate dissipation. So I split the difference and decided to try the 5881 for now. I'll lose some max. volume, but this amp doesn't leave my office, so that will be a small matter. I think.
I bought a matched pair of 5881s for my Fender HR/Blues deluxe that I modded into a Bassman. So much better that the 6L6s. It begins to break up just a little earlier so I can turn the amp master up some without being overly loud. The tone shape is perfect for the cleans all the way to the tight hard rock that I play. Cheers JJ, Apex and Antique Elec. Supply!
Great Power Tube Replacements. I've used these in a 1965 Fender PA 100, incredible improvement.
I build amps and pedals for local musicians and recently I installed this tube in my bench test amp based on a Fender 5F1 but with a 7k ohm output transformer and a Marshall tonestack. It has only a 12AX7 (JJ ECC803S) and I usually run a JJ 6L6GC in it. The difference is notable. The 5881 is definitely a lower power tube but it seems to have a much rounder bass response. This is a weird analogy but if the sound response of the 6L6 is like the shape of an eggplant then this sounds more like a pear. Fatter on bottom and not as big on the highs and not nearly as big but sometimes all you want is a pear.
I installed these in an original Fender Blues Deluxe amp (not reissue) and I'm very happy with the results. The amp has a very balanced tone now-good lows, excellent mids and sparkly highs. I've used a number of different brands of 6L6s (original Svetlanas- circa 2000, Groove Tubes GE6L6 and Sovtek 5881s) in this amp and I prefer the tone of the JJ 5881s over the others. These also have a high plate voltage rating (around 500V). Well done JJ!
Actually very nice sounding tubes. As mentioned in the description they are a little flat, but create a great canvas for heavy pedal users.
VERY WELL DONE JJ !!!! Beautiful sounding tube! Lows very defined fat and tight, nice midrange, sweet highs, very musical tube. Test amp was a Bugera 333 Infinium loved the sound so these will be the mainstay in this amp. Thank You AES for your service and expertise!!!!!