TUBE, TUNG-SOL REISSUED, 6L6GC STR, APEX MATCHED QUAD

All pictures are for illustrative purposes only.

PID# 55391

Variants:
Single
Pair
Quad
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Description

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A nice solid short bottle 6L6 that looks more like a 6L6WGC but has 6L6GC performance ratings. The plate structure is very similar to a Svetlana with the extra cooling wings and the bottles are very similar to the Tung-Sol 5881. One could be led to believe that the parent company used bits and pieces from current production and came up with the Tung Sol 6L6GC-STR. This is partly true but inaccurate. These are a very rugged tubes with a unique, “dusty-black” plate coating. The sound is closer to a 5881 than a 6L6GC but they have a higher output rating. Biasing in my sample tubes was very particular. If you bias them hot they lose some definition and take on that tweed amp tone. With these tube hot could be anything above the 70% mark. During the test I found that idle settings between 15 watts and 20 watts (50-60%) provided a clean, warm sound that would overdrive nicely. A lot of techs go for the 70% mark, or about 21 watts at idle. The Tung Sol 6L6GC-STR starts to change character at this point. The result is not unpleasing and they are rated for more output than a 5881 or 6L6WGC so by all means experiment. This is one of the few tubes tested where it is suggested to start at 18 watts idle (60%) and then slightly adjust up and down to find the spot your ears like best. Check again with your test equipment to make sure you’re in spec and you should be good to go.

SPEC SHEET

Specifications

Features

Tube Type Power
Tube Style Quad

Specific References

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