Hello !
I'm interested in finding infos about the QBL 5-3500 by Philips.
Is it possible to find it in the market ? It's an external anode
tube capable of 3000 W plate dissipation used in the past in FM
and band I TV transmitters.
Is there any design for using it on HF ?
It is a tetrode.....and needs 800 V for the VG2...how to obtain
this voltage directly from the anode ? With a resistor ?
73
<bold>73 de <color><param>ffff,0000,0000</param>IT9GSF</color> !
<italic>
Fabio Grisafi
via Ferrari Orsi 85
90123 PALERMO - ITALY<color><param>0000,0000,ffff</param>
</color><color><param>ffff,0000,0000</param>
</color><color><param>0000,0000,ffff</param>"One of the Lampedusa Island
Marconi Contest Club Gang".</color></italic></bold>
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