You are bidding on a pair of Sylvania 12BH7A tubes.

These tubes have gray oval plates and D getters. They were made in 1958 and 1960. The left tube appears to be a black plate. It is not. It is a darker shade of gray. Besides that, the black plates are a shiny black. Sylvania may have found a different vendor for supplying the plates.

They were tested on my Dan Nelson calibrated TV-7/B. They have been tested for shorts, gas, and transconductance. The tubes test very strong with readings of 95/95 and 78/80. Minimum is 29.

They have been sonically tested in my DIY pre-amp and are quiet with no noise or microphonics.

All tubes are tested on my calibrated TV-7/B or on my calibrated Hickok 539C. All of these tubes have been tested for transconductance, shorts, gas, leakage and life. All tubes meet or exceed manufacturer published specifications of transconductance (Gm) for the specified tube type. All tests are tested twice - prior to the listing and prior to shipping.

I have been selling tubes on the internet since 1998 and have been working with tubes since the early 1960's.

If you have not already done so, please take a moment and look at my feedback.

All tubes are 100% guaranteed good on arrival.

These are great tubes for your new audio gear, guitar amps and vintage stereo/audio gear.

Thanks for viewing my auction. Please check out my other auctions for more audio tubes, ham radio and radio related items, and collectibles for great deals.

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Regarding Shipping

Your tubes will be well packed. All tubes are shipped in white boxes or the original boxes if available. They are than are wrapped in bubble wrap and shipped in a box. I have shipped thousands of tubes all over the world and have not yet had any arrive damaged.

Payment must be received with 2 days of the auction close. Foreign bidders are welcome to bid.

I will gladly combine auctions to save on shipping when possible.

I have sold and shipped electronic equipment and tubes to over 75 countries.

I pack items very well.

See my feedback and bid with confidence!