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That "carcass" reference was a good one. Got a nice chuckle out of the imagery. I can transfer a new piece of electronic equipment into a carcass in record time.

Just what a bloke wants to hear very shortly after ordering a Carl amp. ;)

Well I took the plunge and ordered a Carl Built amp. Fingers crossed it works well. Now to figure out what to do about the KL503HD I have been tinkering with for the past few weeks. The extent of the tinkering was to replace the 9 mosfets. Are there any brave souls on this board that want to...

I just ordered an amp from Carl. I emailed him three separate times and each time I got a quick reply with the answer to my questions. Can't ask for more than that.

It sounds like given my requirements that I would be okay not upgrading to the C transistors. But down inside I can't count the number of times I have regretted not doing an upgrade as part of the initial purchase e.g. new car or motorcycle or snowmobile or, well, really anything. That said, I...

This is going to be used as a part of my base setup. I currently have a single 120 amp power supply for both my radios and amps but will be dedicating the 120 amp PSU to the new amp if/when I can get one. I have been using an RM Italy 27/586 low pass filter with both my KL203P (poor SSB audio...

I have an Anytone AT-5555N II and a President Lincoln II+ (V4), both purchased from and gone over by Scott's Radios. Do you think the following amp would be a good SSB choice for these two radios? I don't know if/why the optional 2879hg transistors are worth it for the extra cost but I plan on...

It's all back together now. Result is it is way down on power and the audio on SSB still sounds like @#$@#. I am using a bone-stock President Mckinley SSB radio to test it out. I'm done screwing around with it. If I can find a shop to send it in to for professional repairs, great. Otherwise...

I just saw a site with a different way of testing the mosfets. With the red lead on source and the black lead on drain, I do get a positive reading of about 0.54 on the new ones so that tells me they are good. But then I tested the original driver mosfet and it passes this test too. I also did...

I'm off to a flying start today attempting to install the new mosfets. Here is a link to the mosfets I bought. They are stamped with "IRF520 N26K AD". I figured I should test them out before installing them so I following the same steps with them as I did when testing the original ones I...

I spent a lot of time jacking around with a pointed tip that I think I bleeped up a few of the pads. By the time I changed to a chisel tip and learned the "add solder to remove solder" tip, I was nearly done. The surface scratches are from my first attempt at pulling the mosfets when using the...

I am considering ordering the 400HD to run with my 5555N II as a base. I have a Powermax PS4-120 amp power supply so amperage-wise I should be good. Its voltage output is adjustable. Are you running yours as a base or mobile? If a base, are you using a single PSU for both or one for the...

No soldering has been done yet. Seems we have some new folks in our support area that are not quite up-to-speed on how to handle after-hours production outage alerts. Fun evening! This is the Kester 44 solder I got the other day when I also got the recommended solder sucker. For now I decided...

I definitely need more practice soldering. I am currently finding it next to impossible with my current technique and skill level to get all of the old solder out of the three holes the mosfet legs feed through. I've been using a solder wick and solder sucker in the attempts but no joy. I even...

The replacement mosfets arrived today. Time to install them. When soldering in the new ones, is it better to solder from the top side of the board or the bottom side? The top side has a lot of stuff in the way of reaching where the leg goes through the board. The bottom side has better access...

I was able to order one of these from Barry.

Thank you for the PDF. It's very helpful. I sure must like making things more difficult for myself.

Maybe this is the part that is disconnected. ATT 1 7dB. If so then I'll do more digging to work out what it looks like when it is properly connected.

I've been searching the web to try to find a picture of how that 7db component actually connects to the two ends that I broke off. Bound to be a picture out there somewhere. I did start doing some searching on here about bypassing the driver but ended up getting dragged away by that great...

I finished removing the rest of the mosfets and tested them the same way I did the driver. The driver is the only one that failed step 4. The rest turned on/off the way it was described in the video. I ordered the replacements on Wednesday and they are supposed to be here today. However, I...