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Hello Fabio,
The QBL5-3500 is a nice tube. I use it in my 144 MHz EME amp and the HF amp
(G2DAF circuit...)
I run about 5 kV on the plate, 800 V on the screen and -105 V on the grid in
the 144 PA.
The G2DAF circuit is a different story.
The tube is grid driven in both amps.
73 de Peter/SM2CEW
At 23:32 1999-10-18 +0200, you wrote:
>
> Ho wto feed the power thetrode QBL5-3500 by Philips ? Anyone uses that
> external anode
> old TV Band I and FM tube ? I wish to use it on HF...
>
> 73 !
>
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<html>
Hello Fabio,<br>
<br>
The QBL5-3500 is a nice tube. I use it in my 144 MHz EME amp and the HF
amp (G2DAF circuit...)<br>
<br>
I run about 5 kV on the plate, 800 V on the screen and -105 V on the grid
in the 144 PA.<br>
The G2DAF circuit is a different story.<br>
The tube is grid driven in both amps.<br>
<br>
73 de Peter/SM2CEW<br>
<br>
<br>
At 23:32 1999-10-18 +0200, you wrote: <br>
<font size=2><blockquote type=cite cite>Ho wto feed the power thetrode
QBL5-3500 by Philips ? Anyone uses that external anode</font><br>
<font size=2>old TV Band I and FM tube ? I wish to use it on
HF...</font><br>
<font size=3> <br>
</font><font size=2>73 !</font><br>
<font size=3> <br>
</blockquote><br>
</font></html>
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