----- Original Message -----
From: "Jason Buchanan" <jsb@digistar.com>
To: <amps@contesting.com>
Sent: Wednesday, October 20, 2004 1:02 PM
Subject: [Amps] Drake L4/L4-B tube replacement - 3-400Z or 3-500Z or
3-500ZG
>
> Not to beat a dead horse but is there any benefit to plugging
3-500ZG
> tubes in a stock Drake L4 or L4-B? Is the stock Drake power supply
> sudsy enough to show any benefit to using the bigger tubes or is a
> 3-400Z the limit the power supply can provide for? I noticed the
> amplification factor for the 3-400Z is 200 where it is 130 or less
for
> the 3-500Z and 3-500ZG tubes. thanks..........
Hi Jason,
the power-supply is the weakest part of the L4/L4-B followed by the
bandswitch.
With the original power supply you are limited in power, with an
external power supply
you are limited by the bandswitch.
IMHO there is no benefit to use more expensive tubes in those linears,
the gain ofthe 3-400Z is better, so you can use the transmitter with
reduced power for better linearity
73
Peter
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