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No, Q109 has not yet been mucked with by me. I'll see if I can pull a part number off of it and do some digging. Last week I invested in a 10 power and a 30 power lighted magnifying glasses. I have joined the gang of geezers that can't read all that damn fine print anymore. Could be much worse...

If I were to hazard a guess, I'd say the pre-driver transistor is the one on the left side just around the corner from the other three IRF520s (circled in blue). If so, it was replaced too.

To be honest and to show my ignorance, I don't know what that looks like, where it is located or how to tell if it is good once I do find it. But I'm definitely game to try. To try to resolve the SSB voice distortion, I replaced the four circled IRF520s with Vishay-branded ones from DigiKey...

SSB modulation was fine before I started having the feedback or whatever issue it should be called when testing the Carl Built amp (not its fault!) with the Q5N2. Ever since then, the SSB modulation can best be described as crunchy, choppy like when you're using a crappy amp on SSB except this...

The Tekpower supply finally arrived after a week's delay. The Megawatt S-400-12 I ordered on Feb 23 also finally arrived today. It was stuck in the Big Bear Lake, CA post office for a week or so due to the blizzards and road closures. That area just got hammered by snow. Anyway, I followed the...

Very nice! Although my twice surgically repaired lower spine aches just seeing you digging the hole.

Thanks for the advice linearone. I've seen ferrites mentioned a lot but was not quite sure why/when/where they are used. The antenna feedpoint is about 33 feet up a pole so this will have to wait until spring and the snow/ice is off the roof and I can take the antenna down. I am hoping a tilting...

Initially I did have the antenna and mast it is mounted on going to its own ground rod right at the base of the mast but then my understanding became that this was possibly causing a ground loop or some other issue/concern and that I needed to have this second ground rod bonded to the main house...

If you mean the antenna I am using for the Carl Built, it's a Maco V58 up about 35 feet on a mast that is grounded and bonded to the main house ground rod. I have a 50 foot length of RG-213 connected to the antenna at the feed on one end and running to where the coax enters the house. I then...

And I am glad. I now have one where it wasn't the box and one where it was. At least it was the less expensive one where it was the box.

I ended up ordering the Tekpower TP3005T Variable Linear DC Power Supply to help me become more self-sufficient when fixing my damage. It's arriving tomorrow. Then it's time to use the Stryker bias video as my guide and see what happens to the radio. Make some popcorn and place your bets. It...

The dummy load arrived and I was able to start some testing with it. The full configuration is radio to amp to RM Italy 27/586 500 watt low pass filter (LPF) to a Daiwa CN-901HP meter to antenna. The antenna showed a starting SWR of flat on channel 1 and 20 and maybe 1.2:1 on channel 40. I used...

I think an assumption I made may be suspect. I assumed I would be able to use the Megawatt S-400-12 I have coming as the 10 volt source for the bias adjustment since it goes as low as 9.5 volts. The radio itself will be powered by my Powermax PM4-120 PSU. Is it safe to use the S-400-12 as the...

:) I'm originally from Canada and apparently I don't know how to spell Yooper! Oops. That'd be like someone calling me a Canook instead of a Canuck or a hoosier instead of a hoser. The only bridges I can think of in the UP are Mackinac (we go to St. Ignace for a week every summer) and Sault Ste...

My second smaller power supply is due any day now so it will be useful in this bias adjustment process. I did just have to order the 8 ohm 25K ballast resistor. I think I already have the rest of the stuff I need. Knowing the radio is already a bit ill takes a bit of pressure off this surgeon.

Yes, please do. Yupers are always ready to help someone in need. :) And thank you.

Thank you kind sir. I mainly want to try to ensure I don't electrocute myself. This is much more interesting than taking care of all the snow we got over the past few days.

I have been contacting a bunch of different folks that repair radios. So far I have only found two that will even talk to me about the SSB modulation issue I am having on my Q5N2 but it's a start. Note that the radio did not come with this issue. I believe it's a self-inflicted byproduct of most...

I need to get the SSB looked at on my Q5N2. It's fuzzy and choppy like it'd be running it through a class C amp. AM is fine. I've been searching online for a reputable service shop to send it to for professional repairs but so far the ones I have tried to contact have either not answered the...

I have a MFJ-264 dummy load due to arrive on Saturday. I'm not doing any more testing until it arrives.