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North American Shortwave Pirate / Re: Goat Herder Radio 6935 USB 2213 UTC 3 Jul 2021
« on: July 03, 2021, 2243 UTC »
Excellent reception, about S9 on WebSDR based in Pennsylvania
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If I was to suggest one amp that fits your parameters it would be a used Drake L4B, it has a continuous duty rating, easily sourced tubes (2x3-500) and no mods needed for those freqs. mentioned.Perfect! Thanks for your help, I appreciate it!
How much output are you looking for and what amount of drive power do you have?Depending on the situation of course, but I don't see a need for anything more than 500 watts. As for drive power, I can output anything between 1 and 100 watts.
Most ham amps are only rated for intermittent use at full output.
A tube amp will easily tune just above or below the ham bands without modification, further away a tap on a coil will need to be moved.
12v like old school cb linear or a plug in the wall kind most likely with tubes or quite expensive?My vision of it would be the plug in the wall type, either 120 volts or 220 volts (120 is preferred because I wouldn't have to go through the bother of installing a new receptacle)
You can check out the reviews of various RF amps here, https://www.eham.net/reviews/products/10 I wouldn't go solid state, if you intend to use it where I suspect you might, since most solid state amps are still not forgiving. Tube based amps are, not only more forgiving with long key-ups, but are easier to tune down to where you want to. Just don't over drive one and watch those high voltages.Thanks! I'll give those a look. Do you have a good resource on the theory on how to modify a tube linear amp? I don't mind about having to figure things out, I don't need to be spoon fed!