This is a very well matched pair of Ei EL84/6BQ5 tubes. They were made in the Ei factory in Yugoslavia. Each one of these tubes tests very closely to the other, and they are visually almost identical to each other. They both have code KM4 and the Ei factory code printed on each tube. These tubes have silver plates, white lettering, and a halo top getter. These are highly sought after Ei 6BQ5 tubes, act quickly before they sell out!! More available upon request.
Be careful buying tubes from other sellers who list "matched pairs" but do not provide test results or specify the equipment that they use to test their tubes.
I personally tested this tube on my recently calibrated Hickok 600a and TV7D/U tube testers.
The results are as follows:
11,500
10,875
| Listed | 2 years ago |
|---|---|
| Condition | Excellent (Used) Excellent items are almost entirely free from blemishes and other visual defects and have been played or used with the utmost care.Learn more |
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Product safety information may be available here.

