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{museum features} Six Sixty | equivalentsPM2articles
collections G8LSD Valve Collection |
The SS215P from Six Sixty is an audio output triode that is equivalent to the Mullard PM2.
The electrodes are obscured by the blackening of the envelope, this suggests an azide process valve. Looking up from the base the anode box becomes visible. The supports show that the flat horizontal structure consists of a single V filament and the grid.
This valve was an ebay find and was sold as unknown. The markings are difficult to see and are formed in the glass envelope by etching with hydroflouric acid. It took many attempts to photograph the markings with any success.
Part of the exercise to reveal the detail was to reduce the image to a negative.
The same lighting allowed the other markings to be seen.
The balloon envelope is 45 mm in diameter, and excluding the B4 base pins is 92 mm tall.
Pin Connections
The electrodes are obscured by the blackening of the envelope, this suggests an azide process valve. Looking up from the base the anode box becomes visible. The supports show that the flat horizontal structure consists of a single V filament and the grid.
This valve was an ebay find and was sold as unknown. The markings are difficult to see and are formed in the glass envelope by etching with hydroflouric acid. It took many attempts to photograph the markings with any success.
Part of the exercise to reveal the detail was to reduce the image to a negative.
The same lighting allowed the other markings to be seen.
The balloon envelope is 45 mm in diameter, and excluding the B4 base pins is 92 mm tall.
Pin Connections
This valve was an ebay find and was sold as unknown. The markings are difficult to see and are formed in the glass envelope by etching with hydroflouric acid. It took many attempts to photograph the markings with any success.
Part of the exercise to reveal the detail was to reduce the image to a negative.
The same lighting allowed the other markings to be seen.
The balloon envelope is 45 mm in diameter, and excluding the B4 base pins is 92 mm tall.
Pin Connections
Part of the exercise to reveal the detail was to reduce the image to a negative.
The same lighting allowed the other markings to be seen.
The balloon envelope is 45 mm in diameter, and excluding the B4 base pins is 92 mm tall.
Pin Connections
The same lighting allowed the other markings to be seen.
The balloon envelope is 45 mm in diameter, and excluding the B4 base pins is 92 mm tall.
Pin Connections
The balloon envelope is 45 mm in diameter, and excluding the B4 base pins is 92 mm tall.
Pin Connections
Pin Connections
