RARE: Paired Pinched Waist Amperex USA PQ White Shield 6922

Selling my best USA 6922/6dj8 - 1960 production, from memory and from the code still visible on one..

I have experienced no microphonics, humming or buzzing at all with this pair when using with my woo wa2.

Lightly used as I generally lean towards the Holland (pinched waist) tubes and can’t be bothered tube rolling too much.

These were bought by me with the measurements on the boxes in the photos.

I have not measured them myself.

My own personal experience had these sounding great from first listen.

The first thing I noticed, and stood out, was how good the detail is even if music is being played at low volume.

Not as warm as the sound from the Holland Pinched waists that you can find for closer to $1000.

These USA Pinched waist are what I would call as neutral as you can get without coming across bright in their nature either.

Here is what the reference website of Joe’s Tube Lore says about these and sums them up unique lyrically::

https://www.audioasylum.com/scripts/d.pl?audio/faq/joes-tubes.html#6DJ8-2

“Amperex 6922, PQ, white label, US, pinched waist (shield, gold pins) Yeow! My reference tube. An absolutely gorgeous sounding tube with an unusual physical characteristic. The glass of the tube is actually slightly pinched at the about the point of the upper mica spacer. This reduces the tube’s diameter at that point resulting in a subtle hourglass shape. The reason for this was for the bottle to actually clamp the upper mica space at its rounded corners resulting in a more rigid, less microphonic, structure. The result? A tube that defines the Amperex house sound: Lively, transparent & detailed with extended highs, yet absolutely no grain, with a punchy, dynamic bass. Mids? Lucid and palpable, thank you. The best tube in the 6DJ8 family IMO. The only downside? These guys make the rare Siemens CCas look absolutely common in comparison. Cost? If you have to ask.. If I were hunting for a tube almost as good and much more accessible? I’d hunt down some US white label PQs and live contentedly until the gods smiled on me and I lucked into some of these...”

Cheers

Peter T

Edited 6 hours ago by Ccollins