Gary, before you shotgun all the capacitors, look at all the solder joints for the affected boards with a high intensity light, and a magnifier. A head mount magnifier with light may work, but I ofte
Spend the extra money with RF Parts Co. to buy the matched pairs for circuits that use two opposed transistors. If one of the numbers is a single stage driver you only need one. - Stuart K5KVH
Art, re headphones audio level, it may be a number of things: If the spring contact that makes to the phone tip plug gets to losing its spring tension it might make a high resistance connection and a
Yes, I remember the copper needles project and before that experiments at White Sands with ionizing chemicals for improving "skip". -Stuart Rohre K5KVH
One of the problems with suggesting other petroleum oils or greases, is most will eventually dry out to a gummy and sticky mess in PTO use. Tri Flo has the ability to dissolve the dry, gummed up grea
the Tri Flo lubrication tip was something I mentioned long ago to various reflectors after using it on sliding door and window tracks and anything rotating or sliding. The recent revival of the threa
Peter, Does the present master oscillator plug in? You may only have some oxidation on the contact pins or jacks. Unplugging the sub assembly or the cable if so equipped may be all you need. With pow
There is at least one internet project with photos of a double PI net balanced tuner, which should work quite well. It uses copper tubing for two large inductors and transmitting sized variable capac
A little cleaning of the switch contacts with DeOxit ought to fix the "bad" mike switch. Most mikes only need 2 to 4 screws removed to be inside. Mike switches often can be replaced with slide switch
Surprisingly, we found the ground losses to NOT affect adversely our use of 100 watt transmitters at Field Days for NVIS to our target areas in state of TX and nearby states. The highest we have used
For Peter Klein: You need for horizontal loops to look at the L.B. Cebik models at cebik.com. He has other antennas there as well but a whole series on Horizontal loops of various heights and configu
For those newer hams, a word about power rating of the Johnson Match Boxes: These were designed in the days of power input ratings, and AM phone operation where you had carrier power plus modulation
I know and have seen photos of Don Wallace climbing his 90 foot telephone poles that held his Rhombic antennas when he was around 80. His original property that covered the Pacific Palisades was grad
YES very warm capacitors indicate increased power loss, or formation of a short. 28 years on the power supply is about 8 years beyond BEST capacitors' lives. Replace all electrolytics while you are a
Joe, are there plug in cables you had to loosen to remove front panel? If so unplug and replug a few times to loosen oxides; then invert the sockets to shake out any debris. Might be as simple as tha
Just search Custom Quartz Crystal manufacturing; or see if International Crystals in Oklahoma City is still making them to order. The only other option is a parts unit from a swap meet. Well, there i