A few more things to remember: ?the steady state rating of a circuit breaker or nominal load is 80% (16A for a 20A circuit, the ICAS rating for the la1k is about 1kw output, ?the CCS rating is about 225W, ?the efficiency of the amplifier is about 50%.
I run my station on 240V, using a 4-wire 20A circuit.? This provides 120V and 240V circuits. ?
With SSB I drive with about 30W for about 600W output and the temperature rarely gets above 40C.? For FT8 and long winded digital CCS operation the temperature may reach the low 60s C.
My only complaint is the physical size, especially the depth.
Don/KT3V
On Thu, Nov 23, 2023 at 14:19, Kent Trimble, K9ZTV <
k9ztv@...> wrote:
The concern is with the current draw, as Jerry Webb clearly and accurately posted.? According to the manual, at 120 VAC the maximum current draw for the LA-1K is 33 amps.?
It is false security to assume all must be well if circuit breakers rated at 20 amps don't trip.? It is impossible to know what is happening to wiring behind sheet-rock, to the plastic connectors splicing them, and the insulation encompassing them.
In the realm of solid state amplifiers, to be safe the rule of thumb is:
120VAC supply:? limit RF output to 500 watts
240VAC supply:? limit RF output to 1500 watts
>
73,
Kent
K9ZTV
