[Sarchi]

This is the recommended tube upgrade for owners of the original Miniwatt S1. Sale pending on my amp, but the set of upgrade tubes are available. As pictured.

2 x NOS Western Electric 403B preamp tubes
2 x NOS Svetlana 6P1P power tubes

Asking $70 obo shipped within North America. I don't have the tube boxes but can pack them safely for shipping. They are like new with very few hours of use. Probably last forever.

[FullRangeMan]

This is the recommended tube upgrade for owners of the original Miniwatt S1. Sale pending on my amp, but the set of upgrade tubes are available. As pictured.

2 x NOS Western Electric 403B preamp tubes
2 x NOS Russian military 6P1 power tubes

$70 shipped within North America. I don't have the tube boxes but can pack them safely for shipping. They are like new with very few hours of use. Probably last forever.

The Russian tube as the image show are the 6P1P,
a Tetrode made by Svetlana, the long life version
are the 6P1P-EV specified 7500 hours, good tubes.

[Sarchi]

Thanks, I corrected my post. (I was told they were military grade?)

Open to offers, I know the WE403B prices are all over the map, especially if you shop eBay.

[FullRangeMan]

Thanks, I corrected my post. (I was told they were military grade?)

Open to offers, I know the WE403B prices are all over the map, especially if you shop eBay.

If they have the rhombus/diamond <> with a number inside they were approved in the military test.

[Sarchi]

These are sold. Thanks