In looking at several HF amps, I notice that PEP and CW are usually of
different levels for a given amp.
For example, THP's HL-1.2 is rated at 750w PEP, 600w CW. Granted, a receiving
station would not notice any difference in a 0.9 dB increase of power on any
mode but I'm wondering how the
The KPA500 is rated for 500W PEP or CW.
Bob, N6CM
On Thu, May 26, 2011 at 4:50 AM, John Harper j...@ae5x.com wrote:
In looking at several HF amps, I notice that PEP and CW are usually of
different levels for a given amp.
For example, THP's HL-1.2 is rated at 750w PEP, 600w CW. Granted, a
could it be that 750 watts PEP is the same as 600 watts key down
H
Bob K3DJC
On Thu, 26 May 2011 06:50:48 -0500 John Harper j...@ae5x.com writes:
In looking at several HF amps, I notice that PEP and CW are usually
of different levels for a given amp.
For example, THP's HL-1.2 is rated
Well, no.
THP's specs are all confusing because they are very cautious to not
recommend pushing the amplifiers to their limits. They hope that the users
will not push them to the highest level output and thereby minimize the
likelihood of over-driving etc. which if not controlled can lead to
could it be that 750 watts PEP is the same as 600 watts key down
After spending a lot of time looking at solid state amplifier
design the most likely reason for a 750 W PEP/600 W CW specification
is either cooling or power supply limitations.
In practice, if the power supply and cooling can
While it may be capable of hitting 750 watts key down ( and more) isn't it
likely that CW is derated due to duty cycle issues? Probably power supply.
Even if THP is conservative in ratings, there's probably a rational reason
behind the spec as stated.
Sent from my iPhone
On May 26, 2011,
In addition, according to the user's manual, the key down time in CW at max
power is ten minutes. I wouldn't want to do that to any of my VHF or UHF
bricks, so it seems to me it's a pretty rugged amp.
73,
Tom
Amateur Radio Operator N5GE
On Thu, 26 May 2011 08:09:25 -0700, Robert Friess
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