[AMPS] QY5-3000A in hf amp

[Martin John Hallsworth]

>
>Does anyone on the list have experience of using the QY5-3000A tetrode,
>originally made for VHF television service. This old Mullard product might
>not have surfaced much outside the UK, though there may be some US or other
>equivalent. I would like to exchange notes with anyone who has tried one in
>an hf amp.
>
was given one of them once ..... made a damn good paper weight !!!
Really big anode cooler.
I did get some data but I doubt I still have it.
(I passed the Valve on to some one whom wanted it)
I do remember that the HT is about 5Kv max @ 1.3 amps
and that 3 watts of drive @ 30 Mhz  would give 1200W+ output

I will look to see if I can find the data and let you know if I do.

73 Martin



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