Within the last few months I noticed a raspy signal on 1.824 Mhz 24 hours a day, 7 days a week. My 3 pennant RX antennas indicated the noise was coming from a heading of approximately 135 degrees, an
Hi Bruce, I'm using 3 small Pennant RX antennas (51.6% the size of full size pennants), one pointing 40 degrees, one pointing 160 degrees, and one pointing 300 degrees (sharing the same feedpoint). O
Greg, One property you should look at when deciding the material to use for your insulator (especially if exposed to water) is a property called water absorption and normally it's listed as a weight
Hi Jim and gang, I use protection diodes on the front end of my W1FB preamps (as well as before an IC amp in the preamp, and on the output of the preamp) and have never been able to detect receiver p
Hi Tom, You said : "What works OK in one place will almost always not work the same in another" You just confirmed what I was trying to say, and that is in some applications it just might work. If I
Jim, Getting directly back to your original question, I built a KD9SV preamp, and it has clamp diodes included in the design (I did not add them, they were part of the original design by KD9SV). Does
Worked a station identified as PZ1AA during the CQWW 160 meter CW contest this weekend, and the zone they reported was 8. Wonder if this was a valid call, as I believe the zone should have been 9, an
Now that the CQWW 160 meter CW contest log submission deadline is past, here is an update from Ramon (PZ5RA) about PZ1AA. -- This morning I got a call from the authorities and they told me they have
The one thing that's keeping me from buying a TS590 for use on the topband is the use of a mechanical relay versus solid state switching between TX & RX. Had problems develop over a long period of ti
Alex I called you a few times too, but no luck. Only worked 26 stations during the contest as lightning activity was pretty high in the US which caused lots of QRN so I just kept waking up to see wha
Hi Dwight, I have 3 point fed pennants that share the same feedpoint and use only one BN-73-202 Binocular Core Transformer matching transformer at the feedpoint (one pennant pointing 40 degrees, one
Dwight, Correction, I should have said 0 volts over the control line (not feedline) selects one pennant, +12 volts selects the second pennant, and -12 volts (just reversing polarity of the power supp
Hi Dwight, I just added the schematic of my 3 Pennant RX antenna switching system to my website. http://sites.google.com/site/pennantflagantennas/ Just FYI, Don (wd8dsb) _________________ Topband Ref
Late last year Pete (N4ZR) reported problems with his home brew Bias Tee that included radical shifts in measured impedance when DC voltage was applied to his Bias Tee. Today I decided to make impeda
Tom, you said "Any test is meaningless", and I don't understand where you are coming from on that statement. If you look at my test, I tested with and without the bias Tee, and I tested with a well r
Hi Tom, I also just went and changed the RF load resistor to 200 ohms and checked readings at various frequencies where the impedance was part reactive. I also added a 3rd part to the test in which I
Hi Tom, Thanks for the clarification, and I don't disagree with your most recent posting except I consider a well regulated supply to be one that has low ripple, but that might be where you and I wen
Hi Bruce, Their are numerous methods used for sizing solar panel systems, and using one of the common methods provides the following for your application as follows : Using a battery charging efficie
Late last week I encountered interference on 160 meters which was repeating at 41 khz intervals, and this morning I was able to track the problem down to low voltage bookcase lights at my neighbors h
Recently noticed an increase in my noise level on 160 meters (in the direction of my 300 degree pointed pennant), and about 3 weeks ago I tracked it down to a new apartment complex which is located 0