A drawback with the AL-1500 is the rather basic protection circuit for
the fragile 8877 tube. The cabinet, PS and RF deck are shared with the
AL-1200 which uses the 3CX1200...that tube is almost impossible to hurt.
Wheras the AL1500 requires about 65W for 1500W out, the AL1200 requires
about 80W. If you have the power overhead in the exciter so that 80-90W
on RTTY is acceptable, the AL1200 may be a better choice. Even at 100W
of drive the 1200 is loafing.
Both are good amps but you should weigh the variables.
73...Carl KM1H
On Sat, 22 Mar 1997 15:09:24 -0500 (EST) Michael81@aol.com writes:
>>the AL-1500 is the battleship of them all
>
>Rod,
>
>Quite a report!
>
>I too have been wanting to go big-time and get a serious HF amp.
>However,
>more than 90% of my activity is on RTTY, and this presents a few
>problems.
>
>First, my main radio is a Yaesu 767GX, and in RTTY mode it runs 50
>watts.
>The Yaesu guys want me to run 30 watts (!!!) but this does not seem
>necessary, unless I am trying to run stations in a contest ; normally
>I
>simply limit text to 5 lines.
>
>So, the amp needs to go to full power with 50 watts drive (or maybe a
>little more).
>
>Second, the amp needs to be loafing at 1500 watts. I suppose this
>means a
>box capable of more like 2200 watts so I can turn it down.
>
>Do you think the AL-1500 could fill the bill?
>
>Tnx de Mike N4XSE
>
>
>
>--
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>
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