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It’s not gonna tune laying down.you have to adjust then stand it up away from everything.

You can run it on 120 volts with no issue. Ameritron will tell you the same. I have the same amp & tubes, runs fine on 120 vac.

I have my 718 set to where power on H its carrier is 25 & when I speak it goes to 100-120 depending where I am. Before on a rms meter it modulated backwards but after adjusting the ALC along with the AM power it works nice. I’m told it sounds smooth & it’s about 95% modulation. I have to put my...

I think you’re ass backwards.

It’s not identical, the top section isn’t a whip, it is adjustable by sliding a copper rod out & adjusting the length.

Did you sell the maco brute amplifier? If no where are you to see if you are local?

$248 for PSVANE 572b on amazon. Took 2 weeks to arrive from China but they are nice tubes. Look up psvane company & read up on them.

The 811a is 160 watt tube. 572B is 300.

AM has a lower powered carrier than AM so explain to me your statement because you are wrong. Lock down a radio on FM & see how long it last. The 718 has no FM mode.

It isn’t not ain’t.

My delay on my kl503HD is too long. It has a 3.3uf cap. I did do away with the driver transistor. The long delay was long both ways so taking driver out didn’t do it. Now with just 8 finals it sounds perfect on ssb. With that driver it sounded bad. I want to change the capacitor from 3.3uf to a...

Not resistor, capacitor. 3.3uf

SSB pwr

SSB/ANL is sideband modulation not power.

The kl503 doesn’t even use the mrf454 case style type transistors. They use case style transistors the same as the finals in the Anytone AT6666 radio uses.

I bypassed the driver so only eight finals are being used. I took out the 3.3 pf Capacitor at the input so239 & put in a 15 pf. I have it in line with my icom. 30 pep on SSB now it does 325 watts peak. I listened to it & it sounds just like the radio does with amp off. Only thing seen is an...

If this bypass is done the SWR will be high. Mine was flat now it’s a 3 so I have to use a z100 auto tuner.

It has a -7db attenuator inside to make it handle more dead key. No more than 5 watt carrier & 35 swing. I wouldn’t swing no more than 25 because it doesn’t produce anymore power after 25 pep.

I put a 15 pf in mine, removed the 3.3. It seems ok now. The KL503HD will never see 600 pep. I removed the -7db attenuator & it produces more power. Ssb radio peaking 8 watts pep the amp makes 320 watts. Anymore power it doesn’t produce anymore so I leave it at 8 pep out of my ic718.