Dentron MT-3000A Tuner. Load Q-plus Bridge 10 Crack there. htm K5LAD's Assorted Ham Stuff The Dentron MT-3000A Antenna Tuner and How to Find Some Good and Readable Documentation Key search words: Dentron, MT-3K, MT-3000A, built like a battleship, W-2 Wattmeter, MT-3000A Operation Manual At the peak of the years of the Dentron Radio Company in Ohio, (1970s) this company built some really heavy duty manual antenna tuners. Built like the proverbial battle ship, hundreds, if not thousands of these tuners are still in use today. Someone searching for one on eBay will be surprised that they have maintained their value even today. If you’ve got one of these treasures I suspect that you'll be more apt to sell one of your relatives (not a spouse or a child but, perhaps a your bum of a brother) rather than getting rid of your Dentron MT-3000A. This tuner is well built, will easily handle the maximum legal power limit and operates over a wide range of impedances, even up in the 160 meter band. During the 1970's I owned and operated a ham radio store called 'Derrick Electronics' in Broken Arrow, Oklahoma. I've written about this in several other places on my website so I'll not repeat that information but I was a dealer for the Dentron Company.

In addition to that, I was an active proponent of their equipment and owned several of their pieces, including tuners and amplifiers. I still own most of these pieces and use them often. I actually own two of the MT-3000A tuners, one that I bought back when I had the store and another I bought off eBay. The seller of this second one has originally sold it to someone else and when he shipped it to the buyer, he shipped it via UPS. UPS, in their own special shipping style known to many of my readers, dropped the well-packed parcel and severely broke several pieces inside. Both of the variable capacitors were sheared from the Plexiglas bar insulators which Dentron used to insulate the capacitors above ground. The variables, now freed, shifted inside and broke components in the wattmeter circuit.

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It also broke the heavy-duty ceramic 18 position Inductance Selector switch. Skylanders Spyro Torrent Wii more. The meters and several other pieces, however, were still good and reusable.

The seller, having collected on the destruction insurance from UPS, advertised the unit as a basket case of parts. Knowing full well that I might be buying a pig-in-a-poke, but hoping that I could salvage a few parts as replacements for my original tuner, just in case, I bit on and won the 'tuner kit.' When it arrived (via UPS without insurance) and I was encouraged with what I saw. After studying the sad heap of pieces, I took a positive inventory of what I had. The meters were good, the knobs were OK, the other Antenna Selector rotary switch and the push button switches were OK and part of wattmeter circuit was still intact, although it had taken quite a licking and was no longer ticking.

I tried to repair the broken 18 position switch but that didn't work at all -- J.B. Weld just couldn't do the job on the three pieces of the switch. I was surprised, however, to find an exact duplicate of this switch wafer in my junkbox.

It didn't have the shaft assembly but the one in the new 'junk pile tuner' had just what I needed there. Merging the old with the newly-found, I had an exact replacement of the 18 position Inductance Selector switch. I was able to find Plexiglas stock and duplicate the variable capacitor insulator mounting strips, along with some nylon screws and hardware I already had. The variables has received enough shock to bend a few plates but remarkably few were bent and no plates had been knocked out of their mounts. I was able to get them back in alignment without much difficulty. The wattmeter took me a while to rebuild, mostly because of the difficulty in finding the correct replacement parts.