Hi,
I recently acquired an L-7 amp and I tried it out today. I used my Pro II as
the exciter and an amp keyer.
I got 1250 watts out into a dummy load on 40, 20 and 15, and 1000 watts out on
10. My understanding from a Google search is that this is about right, as the
power supply is not beefy enough to push it to the 1500w legal limit. However,
I did see some claims of this amp obtaining full legal limit, is this real with
the stock p/s?
There seems to be some problem on 80, unfortunately. On all bands, I started
with 20 watts drive and slowly increased the drive while tuning for max output.
When I got up to about 600 watts out on 80, I heard and saw through the meter
a blue arc. This happened twice on 80, and I did not want to try it again.
Not sure what this means, no arc on any other band. Any thoughts on what might
be wrong on 80?
I have not yet tried 160 or any of the WARC bands.
Only other issue observed is that the band switch knob is a little loose. I
tightened it as best I could but it still shifts a bit. Is this normal for an
amp of this age, and is there any fix?
Any thoughts, particularly on the 80m issue, would be appreciated.
73, Bill NZ5N
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