RE: 6 Meter Antennas - OT
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I'd look a PAR Electronics OA-50s for a horizontally polarized omni-directional antenna before the M2s or KU4ABs. I've tried all three and the OA-50 is the only one I still have. 73, Dave N8AG ____________________________________________________________________________________ You rock. That's why Blockbuster's offering you one month of Blockbuster Total Access, No Cost. http://tc.deals.yahoo.com/tc/blockbuster/text5.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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The PAR 6M antenna is the one I was after also Dave, but due to Government contract overload..Dale at PAR Electronics has suspended all amateur antenna manufacturing until further notice! Dale told me it would most likely be into Fall before resuming any amateur antenna work.
73, Larry K1UO
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Re: RE: 6 Meter Antennas - OT
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In reply to this post by Dave Agsten
Dave,
Why? I'm very interested in what about the PAR you thought was clearly superior to the others, especially the M2. Bill W5WVO Dave Agsten wrote: > I'd look a PAR Electronics OA-50s for a horizontally > polarized omni-directional antenna before the M2s or > KU4ABs. I've tried all three and the OA-50 is the only > one I still have. > > 73, > Dave N8AG > > > > ____________________________________________________________________________________ > You rock. That's why Blockbuster's offering you one month of > Blockbuster Total Access, No Cost. > http://tc.deals.yahoo.com/tc/blockbuster/text5.com > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
Re: RE: 6 Meter Antennas - OT
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All my loop antennas are KU4ABs. I've never had a bit of problem out of
and of them and they are the cheaper choice out of the three. I'd also like to know why you found the PAR to be superior to the others. 73 Matt W5LL Bill W5WVO wrote: > Dave, > > Why? I'm very interested in what about the PAR you thought was clearly > superior to the others, especially the M2. > > Bill W5WVO > > > Dave Agsten wrote: >> I'd look a PAR Electronics OA-50s for a horizontally >> polarized omni-directional antenna before the M2s or >> KU4ABs. I've tried all three and the OA-50 is the only >> one I still have. >> >> 73, >> Dave N8AG >> >> >> >> ____________________________________________________________________________________ >> >> You rock. That's why Blockbuster's offering you one month of >> Blockbuster Total Access, No Cost. >> http://tc.deals.yahoo.com/tc/blockbuster/text5.com >> _______________________________________________ >> Elecraft mailing list >> Post to: [hidden email] >> You must be a subscriber to post to the list. >> Subscriber Info (Addr. Change, sub, unsub etc.): >> http://mailman.qth.net/mailman/listinfo/elecraft >> >> Help: http://mailman.qth.net/subscribers.htm >> Elecraft web page: http://www.elecraft.com > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > You must be a subscriber to post to the list. > Subscriber Info (Addr. Change, sub, unsub etc.): > http://mailman.qth.net/mailman/listinfo/elecraft > Help: http://mailman.qth.net/subscribers.htm > Elecraft web page: http://www.elecraft.com > > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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I know I'm going to figure this out only *after* I break down and ask for
help ... but I gotta ask anyway I suppose. I have the K3/100 and an MH2 microphone and I am measuring output power with a calibrated scope across a dummy load. I have been setting up audio gain and compression as instructed (With comp off set mic gain for 5 bars, then increase comp to fill in the waveform...). I have always before observed that, with compression set to zero the peaks of output come up to the power that I have set (or nearly so) but with relatively little in between the peaks. With compression added the waveform filled in at, more or less, the commanded output power. This is what I have always expected but today it is not happening that way. Today, for the first time in quite a while, I notice that what I had been accoustomed to seeing no longer occurs. With compression off I can adjust the mic gain for 5 to 6 bars ALC as usual but the peak rf envelope never gets close to the commanded output of 100 watts. If I press TUNE the full 100 watt carrier appears but I cannot get peaks to rise much past 50 watts with input from the mic. With compression the waveform fills in with RF but the level is stuck at about 50 watts and ALC is still reading 5 bars or more. It does not matter whether I have the audio chain set to High or Low gain .. most of my testing has been with the usual "FP.L bias" setting but I have tried High and also tried other microphones. I notice that, after not speaking for a few seconds, if I make a sudden sharp noise the output does spike up to 100 watts but is quickly clamped down by ALC so that furthur loud sounds into the mic produce only about 50 watts. To make a long story shorter ... When SSB output is set for 100 watts I only get about half that even though the ALC is showing 5 or 6 bars. The same is true with a setting of 50 watts or 12 watts where peak output is about half of the setting and I am seeing 5 or 6 bars ALC. The audio sounds fine in the monitor and signal reports are good. All of this occurs on all bands and I see the full 5 or 6 bars ALC even in Test mode with no RF output. I'm running the latest 1.78/1.58 firmware which I downloaded last week. _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Don,
This issue is fixed (or closer to being fixed ;-) in the DSP and MCU firmware that is currently in fled test. 73, Lyle KK7P _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Dave Agsten
Halos are slightly less than a half wave around in circumference. They
rely on the residual capacitance to be canceled by a gamma match, T match, or utilized with an inductive stub in a beta match. The feedpoint impedance and resonant point reflects the capacitance between the ends opposite the feedpoint. Slight changes to this capacitance, usually due to rain, snow, or vibration can move the feedpoint impedance out of resonance. The radiation pattern of a halo is not circular; the radiation to the sides are down about 2 dB or so from the radiation from the ends. The PAR triangles are slightly larger than a half wave and have greater separation between the ends. The feedpoint impedance is inductive, cancelled by series capacitors. The end capacitance has much less effect on the feedpoint impedance. PAR also include a current mode (choke) balun in the matching unit. Most halo makers do not. The pattern of the PAR is nearly circular, with only a half dB or so variation between the ends and the sides. The inverted vee is an underrated antenna for 6 meters. I think it is superior to either the halo or the PAR triangle and not much more trouble to erect. The radiation off the ends is a few dB down from broadside, but the radiation broadside is 2 dB or so up on the halo. It is lots cheaper as well. While the halos have their place in mobile or portable operation, the inverted vee is not much more trouble than either to erect in a permanent situation, and will provide superior performance to either. - Duffey -- KK6MC James Duffey Cedar Crest NM _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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