NOS • NIB • USA‑Made • Gray Plates • Double “DD” Side Getters
Pair #16 & #19 — Production Code 64‑17
This is a beautifully matched pair of vintage GE 6L6GC tubes from April 1964.
They are considered New Old Stock and come in their original boxes.
The boxes are fragile due to age and may show wear such as stains, tears, missing flaps, or incomplete panels.
Excellent cosmetic appearance
No loose internal parts
Bases are tight
Lettering is easy to read
Photos show the exact tubes you will receive
These tubes were tested on both a Heathkit TT‑1 and a modern eTracer computerized tube analyzer.
Shorts: PASSED
Grid Current: PASSED
Life Test: PASSED
Emissions: 1940 & 1960 (Minimum spec: 1300)
Tested under factory‑spec operating conditions with precise control of filament voltage/current, plate voltage, and grid voltage. Measurements include:
Transconductance (Gm)
Plate Current (Ip)
Plate Resistance (Rp)
Amplification Factor (μ)
Both tubes tested excellent and are extremely close in all measured parameters.
All eTracer data is shown in the photos. A printed results sheet is include in this sale.
After testing roughly two dozen 6L6 tubes, I was able to create only a few pairs that matched this closely in electrical performance, date codes, and appearance.
Each pair was also briefly tested in a working amplifier to confirm proper operation.
In short: this is a high‑quality, tightly matched pair of classic USA‑made GE 6L6GC tubes that should deliver long, reliable service.
Shipping is FREE after the first item.
Domestic: $6 for the first item; additional qualified items ship free.
International: $23 for the first item; additional qualified items ship free.
If actual international shipping costs are lower, I refund the difference.
No added handling fees.
Please use the CART feature when buying from multiple listings.
Items are packed carefully and shipped promptly.
Returns accepted if the item is not as described.
Any returned item must be in the same condition as when it was sold and include all accessories such as tube boxes.
I have several other vintage electronic components listed—feel free to browse.
I’m not a big business or high‑volume seller. I do my best to describe everything accurately and show all relevant details in the photos. I don’t hide flaws or mislead buyers.
Tubes described as "New Old Stock" or "NOS" have test results simular to an average new tube, however, they may have some hours on them.
Listing may include some "Stock Photos".
If you have any questions, please feel free to contact me.