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The THD web site says of the Yellow Jackets, “It’s like having a new amp…” and that’s an understatement! Pull your old tubes, pop in the converters, then plug in the EL-84’s and listen to your amp sing! Sometimes great things just come real easy! Read on…. |
If you follow this blog, you know that I just recently did a write-up of the THD Yellow Jackets. At the time though, they were just on order, and I hadn’t played with them yet. Well, they arrived today, and of course, I just couldn’t wait to get them installed. I opened up the packing box which revealed a little plastic box floating amidst a packing popcorn. I quickly pulled it out, opened up the box, and pulled out the instructions… er… what little of them there were. They basically just said, pull out your old tubes, plug in the converters, then plug in the EL-84 tubes that come with the converters. Turn your amp on, and play. That’s it. It took me all of three minutes to get the converters and new tubes installed.
In nervous anticipation, I plugged my Epi Explorer into my amp and switched it on, strummed a G chord on my clean channel and… No change. Just the same sweet sound produced by my pre-amp tubes. Then I switched to my drive channel and WAS TOTALLY BLOWN AWAY!!! You see, as much as I love my Hot Rod, the drive channel has been somewhat useless for me. Even with new 6L6GC tubes, the clipping was very rough and gritty. It was okay for some songs, but was just not pleasing to me, so I did the next best thing: I bought a couple of overdrive boxes to get that sweet pre-amp distortion.
But with the Yellow Jackets installed, I finally have a useable drive channel! The distortion is smooth, and it seems like the touch sensitivity has increased ten-fold! Not only that, it sounds like the converters introduce a little compression which really helps define the tone, and all this at bedroom levels!Mind you, installing the Yellow Jackets doesn’t reduce your volume (I think I might have mentioned that they do – my bad – they don’t). What they do is get the amp into breakup a lot earlier, so you can slather on the drive and distortion without having to shake the walls of your house! For home studio musicians, and most of us who play in small venues, being able to get great distortion tone at low volumes is akin to searching for the Holy Grail. I’ve tried all sorts of things from upping the input gain on my DAW to using modelers. In either case, the result is less than desirable. But with the Yellow Jackets, I’ve found the elusive grail, and I’m lovin’ it!
As I mentioned in the previous write-up, I ordered the Triode version of the Yellow Jackets. This essentially reduces my output to 5 Watts. Don’t be fooled – my amp’s still freakin’ loud. But what I’ve found in the last couple of hours playing with my three main electrics is that my amp is much more versatile. I can still crank up the volume, but I can get a lot more varied tones at lower volumes, and that is always a good thing.
By the way, you can’t buy the Yellow Jackets from THD directly, but you can get them for a great price at The Tube Store. I got mine for $99.95 (that includes two converters and two EL-84 tubes).






I’m at once sad and amazed right now. Sad because I’m retiring my TS-808 Tube Screamer (sort of – I’ll get into that later), but amazed that I actually replaced it with a $50 pedal, the 
One of my first posts on GuitarGear.org was entitled, “
