Ten-Tec Model R4020 2 Band QRP Transceiver
2018-03-12 Ten-Tec R4020. Back around 2010 or so Ten-Tec sold this imported transceiver. Measuring about 5-1/2 in by 3-3/4 in by 1-1/2 in and weighing only one pound it was/is a very nice 5 watt CW transceiver. The receiver is broad banded but it transmits CW on 40 and 20 meters. It also includes internal battery holders for 8 AA batteries which of course add to its weight. I loved it and had 75 QSOs with it between August of 2011 and June of 2013. Then it went crazy. I sent it in to YouKits (Ten-Tec quit selling it and referred me to them) and $50 and nearly a year later it came back and all seemed well. I had another 37 QSOs. Then it went crazy again. In both cases I don't recall exactly what it was doing but it would get stuck in the memory save mode or something and there was nothing I could do. So I shelved it and pretty much forgot about it.
In the mean time we went through a flood situation in our house and everything had to be moved. Once we got back into our house last Fall and got settled I got my ham station up and running again. And I ran across that R4020. It wasn't until a few weeks ago that the thought crossed my mind to give it a try. So I did and to my amazement it seemed to work! I had another 17 QSOs. It was fun.
The receiver is really quiet and sensitive and a pleasure to listen to. The switch-selectable receive band pass of 900hz, 700hz, 500hz and 400hz is effective and clean. It's a joy to operate. Then I had the misfortune of pushing the VFO/MEM/SAV button! It went crazy again! It would get stuck in the memory save mode and nothing would either save the frequency or let me get out of it. If I powered if off and back on it would start in the normal VFO mode but within a few seconds it would be again frozen in the Save mode - without me touching a thing. So I let it sit for a few days, considering it a loss. But yesterday tried it again. It worked! It seems as long as I don't touch that VFO/MEM/SAV button all is well. So made and super-glued a balsa wood block (see the photo above) to cover that and the next button (I'm afraid to push it!) and all "seems" good. The only button I use anyway is the ATT/IF button. We'll see.