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Well, I do know that the supplies are not happy running in parallel... they make a hissing sound and it makes the amp do some weird things, too. Any suggestions on what I can do to remedy that problem? ~Cheers~

Heya folks! I recently acquired a project amp to work on, and it has (5) of the Mega Watt 400-12 (36A) supplies in it. I'm pretty sure need to build a diode isolator circuit so I can run the supplies together without an issue. Do I just use a 40A diode on each positive wire coming off the...

Naw, Tallman didn't recruit me, just an observation from some random Storm Trooper. ~Cheers~

Entertainment value means that he's Dark Helmet from Spaceballs. ~Cheers~

TRPC: "You have failed me for the last time, Admiral." ~Cheers~

Negative, the fuse is on the secondary side of the transformer, either the bridge rectifier has failed short or the filter capacitor (C304) has failed short. Check those two components and let us know how you get on. (y) ~Cheers~

That's why you don't get married. Problem solved. Many problems solved, actually. (y):ROFLMAO: ~Cheers~

You bought the export version, correct? 10 or 12 gauge wire will work just fine. Install whatever you have an abundance of. (y) ~Cheers~

It's a mixed message only because I'd use it for parts. More specifically, the PCB that houses the 2290 final on it. That's what I'm after. But I would gut the chassis and keep a fair bit of the parts. (y) ~Cheers~

TRPC nailed it 100%... that's why 95% of exports are junk. Get a good CB and call it day. (y) I will say this, though.... if anyone has a 4300HP that they want to get rid of on the cheap, working or non-working but complete, let me know. ~Cheers~

Both, actually. With 0 volts present, you should not get any deadkey wattage, as there shouldn't be voltage present on the TP7/TP8/TP9 rail. TR50/TR51 is designed to drop and regulate the voltage going to the Source pins on your driver and final (center leg), usually to the tune of 4-7V...

Try removing TR50 and see if everything drops to 0, if it doesn't, it would appear that there's a shorted trace somewhere, if it DOES drop to 0, that means TR50 has gone short. Replace TR50 and TR51. Replace TR50 with a TIP42C, and replace TR51 with a TIP36C. Let us know how you get on. ~Cheers~

I'm willing to bet that a filter capacitor has likely dried up and failed short, which will pop the fuse. I would install new filter capacitors and check all the HV diodes, before attempting another power-up. ~Cheers~

Looks like you got the Kop's attention... :LOL: ~Cheers~

If the 11W AM is peak output on AM, you'll be fine, and the 16W on SSB is fine also. If your deadkey on AM is high you'll want to adjust it back to about 2W and let the radio swing from there. Those numbers will be fine for a T/S 350. ~Cheers~

Hang on, let me get my popcorn... ok, I'm good. ~Cheers~