Tube collection

I'm an electronics technician, and I also enjoy antiques, technical of course. As a youth I dismantled a lot of discarded radios, which I somewhat regret now. Well, most of them were broken anyway, and it was an easy way of getting hard to find parts for experimentation.

Somehow I managed to keep the tubes safe, some of them are from before WWII. Here is a list of the oldest ones, the data for most of them can be found at Frank Philipse's excellent website.

Click on the thumbnail for a larger picture.

	6H6	Dual signal diode with separate cathodes in a metal casing.
	EBC3	Dual diode and audio triode.
	EBL21	Dual diode and power pentode. Why anyone would want a detector diode mixed with a power pentode is beyond me.
	ECH21	Triode-heptode. Used as local oscillator and mixer.
	EF5	Another of the 'red' series. IF amplifier pentode.
	EF11	Variable slope RF and IF pentode in metal casing.
	EFM11	Audio pentode integrated with "magic eye" tuning indicator.
	EK2	Octode used in medium and long wave frequency converters.
	EM1	"Magic eye" tuning indicator.
	EM34	"Magic eye" tuning indicator with dual sensitivities. One sector closes well before the other, so even weak signals can be monitored.