"tim" <[EMAIL PROTECTED]> made an utterence to the drakelist gang
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I have had an L7 since 1979 when I picked it up new, I also own an L4B. I agree with Evan
I as a matter of fact what I do is load the amp to the 500 watt position output , in the tune position, I have never run in the SSB position. I would say I use about 40 to 50 watts of drive , and this equates ruffly to 1000Wpep input , plenty of power for all purposes. The tubes in the L7 are original .
73 Tim wb8uhz
----- Original Message ----- From: <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Cc: <[email protected]>
Sent: Wednesday, March 02, 2005 11:04 AM
Subject: Re: [drakelist] Another L-7 Question
[EMAIL PROTECTED] made an utterence to the drakelist gang ---------------------------------------------------------------------- Drake enthusiasts,
From my experience, with three L7s that I own and about 8 L4Bs that I've owned, I have had "different" experiences. Given that the tubes are good, and the power supply capacitors are known to be good, I can get 1500 watts PEP out on 40 and 80 meters, the only bands I operate. I generally run only 900 watts PEP to save the tubes, since the extra 1.5 db wouldn't be noticed on the air anyway. To obtain that output, I drive it with only 60 watts PEP. If one sets the driver up for 100 watts output, my amps would be over-driven with well in excess of 200 ma of grid current, the recommended maximum (except for Amperex tubes). Hence, it is a good idea to tune the amp and driver accordingly, and use the ALC if it is compatible with the driver. Note that the ALC setting will vary from band to band.
Just one ham's experiences. Enjoy those Drakes.
73s,
Evan
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