![]() ![]() I did mention to the TuneMatic owner that the schematic diagram was a bit vague and there could have been a better explanation of some of the parts I found in the box. I'm here to tell you that it's worth every nickel. Tarheel recommended the Tunematic so I checked the reviews and decided to give it a try. I just installed my new Tarheel 100HP onto my RV. Out of the limited controllers out there, don't let the sticker shock send you away, get it, its the best I have used. Lastly the thing is constructed very well in a hard metal case, not flimsy plastic like other brands. Especially ones with a reed switch capability to monitor coil location. All in all an excellent product and I highly recommend it for any screwdriver. You have to do a little of the work at first then it remembers and does the rest from then on and each time you use it. It doesn't need to ride your transmitter non stop hunting in the dark for a low SWR. I like that while it's moving you can hear the received signal increase until BOOM you are there. and I have never found tunes faster than before because the Tunematic will move the antenna based on memory of antenna coil location, then shoot a little RF through it to confirm a match, and you are off working the band in no time flat. I use a Scorpion SA680 by Ron Douglas of AZ. What I like the most is how it fully makes use of the reed switch installed in the more high end antennas. The more you use it and save spots you found good tunes the faster it will move your antenna to a desired part of the band, quickly activate your rig, xmit a little, check the SWR, give a Morse indication it is successful and you are off to the races in rag chew town. After all a good HAM doesn't read manuals right? So I read the manual and was up and running in no time flat. I have an ICOM version coupled to my IC-7K radio. I just installed this a few a days ago my truck. TuneMatic is an excellent product and comes complete with outstanding and knowledgeable product/customer support. My RV has welded aluminum framing and rafters throughout, and seems to have a decent ground return, albeit skewed, even with the rear-mounted vertical antenna. Some RV's "may" enjoy a good ground plane with their aluminum roof rafter system. I removed the cap-hat, then discovered that the 20 mtr tune problem disappeared. ![]() My Tarheel 100HP installation included their CH-1 cap-hat, as I wanted to favor the lower freqs. The Occam's Razor part of my brain suggested that I look at a more simple process, before mucking around with a well-designed item. ![]() Jim offered help in tweaking a PCB pot to adjust SWR sensitivity levels to accept a slightly higher SWR. I contacted Jim, the TuneMatic owner/designer, by phone, because I was unable to obtain a SWR <1.5 on 20 mtrs. After installing everything I then needed to wrap my aging 71 year old brain around THREE new ham products, and get them working correctly, without going nuts!.a daunting process sometimes. The TuneMatic was chosen mostly due to excellent reviews found at eHam, and my appreciation for an excellent small company making a niche product that works well. I installed an Icom IC-7100 TXCVR, and mounted a Tarheel Model 100-HP antenna on the rear ladder of my RV. ![]()
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