Vintage NOS NIB 807 vacuum tubes
In original boxes never yet used!

(5) pin Output power tubes with anode cap
The 807 is a 6L6 with a top Anode cap instead of down next to a heater pin to prevent arcing with high voltages.
The 807 is a higher voltage version of the 6L6G / 6L6GC
First manufactured around 1937-38.
The 807 was used in radio frequency transmitters and at times audio modulators for AM transmission.
Both ham radio and WWII equipment made the 807 very popular for use up to 30mHz.
It was/still is a very popular tube for DIY ham radio transmitter/oscillator CW (morse code)
These tubes make for a great audio amplifier and some like the 807 in single-ended amplifiers like the Williamson amp
The classic 807 beam tetrode valve is unusual in still being designated as current production in the 1960s and having a (5) pin base.
The parameters given are for single ended use.
When used in a class AB1 as a push pull pair with 600 volts on the anode an output power of 65 Watts was normal.
These valves were much used in medium power amateur radio transmitters for high level modulation.
In this use the output transformer, called a modulation transformer, would be impedance matched to the anode circuit of the RF power valve.
The audio power would increase or decrease the amplitude of the RF envelope.
The 807 was also a workhorse of the HF bands.
As a transmitter power amplifier (shown in the lower table) operating in class C producing 40 Watts of RF,
it would need a pair of 807's in push pull to generate the 20 Watts of audio required to fully modulate the valve.
Other modulation systems operating on the screen grid would require much less audio drive but with less RF output.
When I think about the 807 tubes, I must pay homage first to Allan (fergusfergus on Canuck) who made us aware of Hy Bloom who designed and built The Imperial Soundmaster Amp (built by Hy Bloom in Ottawa) My son Ace and I made the time to meet with then 90 year old Hy at his store at 386 MacLaren St.

Imperial Soundmaster 050 model PA amp designed and made by Hy Bloom of Ottawa, Ontario.used these 807 tubes
He manufactured quite a few of them in his day. During WW2, he tested the 807, which was a transmitting tube used in tank radios. Hy fell in love with that 807 tube and after the war when 40,000 of them came up for auction as government surplus,
he bought them all and used them in quite a few different models until he ran out.
Using the 807 tubes should continue last for a very long time
If you can find some well matched pairs, we still have some pairs left for sale!
All of Hy Blooms amps he always put a diagram (schematic) of the model on the bottom of the base plate.
The simplest things are the most profound.
The last attachment is of the Soundmaster Imperial.
Hy Bloom's one and only attempt at ultra high fidelity amplification.
He went all out designing and building this one.
Whereas he built and sold more than 30,000 Soundmaster amps, yet he only built about 250 of the Imperials.
About 50 were sold in Canada and the rest were sold in New York.

Singles @ $20.00
Pairs @ $40.00
Quads @ $80.00
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