The Peter Dahl transformer company and rewinding was sold to another person, maybe the Hammond group? Dose anyone remember? Their prices would be you ship it to them and they rewind for materials and
No one listening to the 38 ohm antenna will be able to tell the difference in signal level from a 50 ohm antenna. There is way more variability in the inonosphere than that small mis-match. Save your
The poster about the antenna said he had 65 radials under it, but did not say how long they were. Most 160 fans seem to do better with inverted L or top hat loaded verticals, for the reasons Rick has
Jim, for Antenna Analyzer BCI from nearby station, find a loopstick or other similar old AM coils and make as series circuit of it and a 365 cap to ground on antenna input of analyzer. It will trap o
John, certainly the synthetic greases are the long lasting types. The Trifly oil and teflon ball bearings are a good quick fix that may last as long as you need the rig. It is by far the easiest fix.
Jumping frequency display may be oxidized contacts in cabling plugs or board edge connectors. Re-seat all cables, and boards in the radio, power off, one at a time, (unplug and replug in.). Look into
Matteo, since you recently had other diode problems, I would look to see if the ALC circuit boards detect RF on board, with more diodes and one or more may be bad. Sounds like the radio may have had
The problem with the attaining the LF band transmit capability is that this is so far out of the usual tuning range of the Scout rig, that things like capacitance values for bypass won't be optimum,
That is a good point about wetting agents forming an electrolytic solution. My long ago chemistry training seems to bring to mind that detergents and soaps function by facilitating ions to separate.
Actual parallel line experience: One Field Day we arrived at our usual site to put up a 300 foot around horizontal loop. We usually corner fed the Delta shaped loop at a corner with 450 ohm line we k
From Reference Data for Radio Engineers, the resistance on no. 18 copper wire is 0.6385 ohms per 100 feet, NOT some 8 ohms! The copper wire resistance tables are given per 1000 feet of wire; and a co
I should point out that the ITT "Reference Data" is for DC resistance of no. 18 copper. But, Could the RF impedance loss be that much greater (8 ohms vs. the resistance of only 0.6 ohms per 100 feet?
Mike, just be sure the substitute crystal is the type sold for computer clocks, or another way of saying that is it has the same capacitance spec as the original xtal. It could be a failure of the cr
John, That much, (5V) of AC on the DC bus all the time is a bad sign. However, are you twisting the red and black VOM test leads to prevent stray AC pickup? You should minimize any different path for
I think the easy way to think of it is to realize the ideal filter is a rectangular pass band of frequencies, ie the 455 kHz traditional superhet filter was responding to a wider band than that one f