kind of nice to have a fuse to limit the current to each transceiver to the maximum it needs, rather than allowing the full current capacity of the power supply (when that is larger than what one tra
This is a HUGE subject. I expect that most of the comments will be subjective descriptions of how well a noise blanker worked for a particular person in a particular location, on various kinds of noi
Hi Don, If you have discussed this before, I did not read it, or forgot it. I apologize if I'm pointing out things that you have already gone over. I would not change out any of those transistors unl
What kind of bandwidth do you get with your inverted L, 50 kHz? Would I still be able to use a tuner in the shack if I want to bend it for more coverage on 160? Define bandwidth. Do you mean SWR band
Hi J, That sounds like a very good setup and it would be hard to improve on it. The SWR should be low enough that using a tuner in the shack ( as opposed to some sort of matching network right at the
Without tricks, in order to have 38 Ohms on a 160m vertical, it would have to be 132 ft. high and have about 60 radials under it. I doubt that more than 2 or 3 people here have ever had or even used
That's a new one on me. How could loss be less with high SWR on a short length of coax? It makes no sense. The loss in coax at HF frequencies is not that high, and the additional loss due to high SWR
I recall that Swan made a motorized version of the sliding contact in the coil antenna. I saw one in the '70s. The Swan used a vertically sliding contact, not one that rotated around the coil to get
I got that one from you. I have received very little (or none) from the reflector lately, so this will serve as a test. 73 ES HAPPY TNX GVNG DE N6KB First problem I have had in a long time but I am j
The carrier is not in the middle of the passband of the filter, otherwise if so, one would have a DSB signal not a SSB signal Thus to swap sidebands, the BFO frequency must change to the opposite sid
"I've had great success using my weller WTCP iron with a 35 watt element and a large chisel tip. and you need lots of solder wick. " A bigger (higher power) iron means more heat capacity and faster h
Ebay MRF454: $70 for 2 unmatched -- china parts are marked "refurbished' not new, which kinda makes me take pause. Do not pause here. Turn around and run away. DE N6KB
My Wellers are the models WP-40 and WP-25. My 'screwdriver tip' on the WP-25 is probably 1/32 across the rounded tip. I like Weller soldering irons too. There are so many kinds (of any brand) that it
I had my Paragon II opened up to clean all connectors and front panel potentiometers. Most connectors were unplugged, sprayed with DeOxit and plugged back in. When I put it all back together and trie
That's correct - it's charge acceleration and deceleration which causes radiation. If you take a long wire and terminate it in its characteristic impedance it will radiate - there doesn't need to be
I tried several times to participate in a discussion on the reflector today, and my emails bounced. I was sending them from a different computer, using webmail with the email address I am subscribed
Any time a charge is accelerated and electromagnetic field is produced. Maxwells equations say this, and I am saying this from the James Clerk Maxwell Telescope. An RF current is constantly accelerat
Yes. Maxwell's equations say nothing about how long the conductor is. If there is charge acceleration, which there is if there is an AC current, then there is radiation.
And any conductor with RF current flowing in it is an antenna, unless there are special conditions to make it not radiate (much) such as in transmission lines and faraday shields.