Hi gang,
Apart from the fundamental discussion do you really need ALC yes/no, I
have raised this issue already quite some time ago. I have an SPE 1K-FA and
K3 on order, and I want to work both full power barefoot as well as with the
amp, but do not want to run the risk to accidentally overdrive
Jerry and all,
OTOH, I would be quite uncomfortable purchasing a modern SS amplifier
that did not implement protection from excessive SWR without depending
on the exciter to throttle back the power.
To my mind, depending on some external device (the exciter) to protect
the amp is a recipe
At 02:59 PM 12/3/2007, Enno, PF5X wrote:
Hi gang,
SNIP A very
quick response from Wayne gave the following info. Sufficient to cool the
discussion for a while I would say ...
Not so - Wayne's comments seem directed at those who might want to
use ALC as if it were a substitute for the mike
Jerry Flanders wrote:
Not so - Wayne's comments seem directed at those who might want to use
ALC as if it were a substitute for the mike gain control.
It worries me when I see the discussion wander away from amplifier
safety in an antenna catastrophe situation, which is my main concern. I
I admit, I may not be the sharpest knife in the drawer, but to see a
reference to an amp, and the words 'full power' and RTTY, all together?
Wow. That raised my eyebrows.
With the power density of RTTY, isn't that a full blown stress test of
your complete RF system, at 100% duty cycle, or
At 05:03 PM 12/3/2007, Don Wilhelm wrote:
Jerry and all,
OTOH, I would be quite uncomfortable purchasing a modern SS
amplifier that did not implement protection from excessive SWR
without depending on the exciter to throttle back the power.
Good point. I think I would prefer this also. But
I used to run 5KW AM all day long myself with nary a break. Had to
check the plate current every half hour or so but that was about it. I
think the amp was using 813's but I can't remember. Of course, we were
on 300 meters back then.
73,
Leigh/WA5ZNU
On Mon, 3 Dec 2007 2:41 pm, Greg - AB7R
There are amps out there that will do full legal limit in RTTY all day long
with the
exciter at 30-50W. Some of these amps are not stressed at all at that level and
are
just loafing along happy as can be. :)
-
73,
Greg - AB7R
Whidbey Island WA
NA-065
K3#0009
On Mon
Right on, Don.
The amp must protect itself by itself and for itself.
Like Overdrive, High SWR, Hi drain current, ad infinitum.
Modern SS amplifiers all have this built in protection.
Like many, I have never used ALC, being CW only, but I
take care of drive power to protect the amplifier.
de Joe,
9 matches
Mail list logo
