MHz. equation (and a mismatch. The circuitry Hi Jim, What you say is true, but take a look at the VSWR of a typical non-resonant antenna and you will see that VSWRs can be significantly higher than 4
George, What is your antenna, and how are you bringing the feedline into the shack? Also, is the RF causing the computer to act up, or is the problem just with the keying interface? One way to tell i
Check the supply voltage under load, Tim. I had a problem with mine caused by a bad external fuseholder (high resistance) between the rig and the external power supply I was using. The rig was fine o
Hi Jim, Some would argue that it takes a masochistic streak to do it with low power and mediocre antennas. I mean, if I turn down my power and antenna gain so the guy on the other end can't hear me,
Check out: http://www.w8ji.com/transmitter_splatter.htm Scroll down to the paragraph entitled "ALC" Mike, W4EF................................................ to enough
Wait a minute!! Don't forget that we are the authorized radio service, not BPL. FCC rules don't protect BPL from interference that it might suffer in the presence of LEGALLY AUTHORIZED RADIO TRANSMIS
If you know the power density (in watts/meter^2) of an incoming plane wave, effective aperture is a very useful concept for determining the amount of energy captured by a receive antenna. In other wo
Yes, there is antenna gain measured in dBi (dB isotropic) and then there is dBmb (dB in mind of beholder). As you suggest, the latter usually involves large DXCC totals and wet pasta :) 73 de Mike,
Actually Sinisa, you just made my point. If you know the effective aperture of the receive antenna, then you can do the calculation of received power straight away. If on the other hand you know the
Allan, I think what your saying is true for permanent magnets. In that case the orientation of the magnetic domains in the material are randomized by the elevated temperature, causing the net magneti
Actually what Sinisa is suggesting is not just mental monkey spanking, it is a very good test. If you don't hear an increase in background noise when you connect your antenna, your receiver quite lik
Bill, I have a Paragon I here which oddly enough I hooked to my spectrum analyzer the other day (I wanted to set the power level to circa S9 so I could check out the key clicks with my Drake R4C). An
Hi Bill, I checked my Paragon tonight with the VFO set to 1813.00 KHz. The high-level close-in spurs that I saw on the 7MHz spectrum are gone with this setting, but I am still seeing low-level discre
Yes, I agree. As long as you tailor your bandwidth to band utilization (wide when the band is empty, narrow when band is crowded), then I don't have any problem with wideband SSB. After all, nobody i
A loop thru for an external linear amplifier would be nice too (this can be a major source of TX distortion). Seems like you could unmute the receiver by an appropriate amount and then downconvert th
Its a handy feature if your keying an amplifier with a slow T/R relay. Contest logging programs like TRlog close the PTT line a few milliseconds before the CW starts. This can give a slow amplifier T
Many of today's top contesters grew up with paper logs and dupe sheets. Today they use the mental bandwidth once consumed managing that paper and pencil and devote it to operating a second radio whic
I would have to agree with Yuri on the importance of #5. I operate from a club station that is setup for Kenwood radios. If I plunked down $3.5K for an Orion, I would probably want to drag it over an