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How long can you key down your 1K output on 120VAC?

When moving my shack to the house I put in 3 brand 120VAC

circuits plus one 220VAC circuit later after finding a 5 minute

Key down SSB period would give me 1K on 120 for less than

a minute, then around 650 for?another minute or so before

it shut down due to reaching 100C.

Please advise how long can you get 1K "keydown" with 120VAC?

We would all like to know.? Palstar engineering does not recommend

input to amp to get 1K out on 120VAC.

Just my 2 cents and 3 cents worth of experience. Who knows

maybe I don't know how to read meters after 40 years in the hobby,

KR9G

On Tue, Jun 30, 2020 at 8:00 AM Dennis via <pegasus9000=[email protected]> wrote:

Back to the "Six meter output" subject first....

??? This amp is VERY efficient on 6 meters... around 72% is what I measured here on two of them.?? What this means is that you will easily get 1kw of output on 6-meters SSB with a stout 120v supply voltage.? I wouldn't be surprised if you could do CW or FM at 1 kw.?? This assumes you have a good stout 12vac main circuit.? A whimpy one with a long run of small wire won't cut it, but something up to code should work fine.? These LDMOS devices really start to "sing" at VHF so their efficiency is way up by 50mhz as opposed to mid to low 50s at HF so the demands on the AC line are much less there.

?? The "Pure Signal" jack is for very modern transceivers which employ a circuit that cuts transmit IMD by about 20 or 30db.?? It basically takes a sample of the transmitted signal from your amp via that Pure Signal port, feeds it back to the transceiver which instantly generates a signal 180-degrees out of phase to cancel the undesired IMD out of your passband.? Pretty much the only radio that commonly does this are the various Anan models.

?? Congrats on ordering one, both of mine work well.

Dennis

N0SP

On 6/29/2020 at 9:31 PM, "Steve Shep" <shepsvettes@...> wrote:

Also what is the pure signal jack for.