>I'm looking into buying a Drake L7 amp.
>Can anyone give their input both PRO & CON.
Hotswitches with modern transceivers. . Needs a stepstart. . Appears
to have better vhf stability than TL-922s or SB-220s, but checking the
bandswitch with a flashlight and a dental mirror wouldn't be a bad idea.
. . Needs glitch protection. . The 14 rectifier 'equalizer' resistors
increase the risk of premature rectifier failure. {p. 11-9, *1997 ARRL
Handbook*}. .. . It might be a good idea to measure the filament
voltage at pins 1 and 5, and record the corresponding electric-mains
voltage. There is little reason to allow more than 4.9v on the filaments
unless you have a free supply of tubes. . . The tune-up instructions
beginning on page 3-1 are bogus. . . The 80m to 10m tuned input
circuits are a bit short on operating Q, however, the 160m tuned input is
not. If you can not get the swr down, more Q would help.
Rich...
R. L. Measures, 805-386-3734, AG6K
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