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Re: LF: RE: G3LDO 500kHz rig

from [Peter Dodd] [Permanent Link][Original]
To: [email protected]
Subject: Re: LF: RE: G3LDO 500kHz rig
From: Peter Dodd <[email protected]>
Date: Fri, 29 Feb 2008 23:52:08 +0000
In-reply-to: <000901c87b17$0b094400$0201a8c0@ken>
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Ken M0KHW wrote

How many watts is the PL519 running?, I have some 807s I was thinking of
using, but they like 750 volts on the anode.
The PL509/519 is very rugged and will give far more power than an 807 at relatively low HT voltages. I run my PL519 at around 80watts output although it is capable of a bit more without exceeding the anode dissipation. The only downside is that the PL509/519 requires 40v for the heaters but I had a suitable transformer in one of my many junk boxes.
In 1998 LX1PD used a transmitter on 136kHz that used 16 PL36s in parallel. The PL36 was also a TV line TB valve. 

regards

Peter, G3LDO
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