ARRL

WA9WVX

Joined: Sat, Apr 4th 1998, 00:00 Roles: N/A Moderates: N/A

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HF Beam Antenna Polarization Aug 19th 2014, 02:05 6 403 on 21/8/14

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Topic Author Posted On
Mobile Amplifier bayern1943 1 week, 1 day ago
The way I have read your post sounds like you are using separate antennas for 2 m and 70 cm and you only have a RF amplifier for 2 m. I don't believe you can accomplish what you want to do using a Diamond Duplexer unless it is only a 2 Port In / Out and 1 Port for the In / Out or Common. You haven't specified what type of transceiver & model number, whether it has 1 or 2 Antenna Ports and mind you the little so called Duplexers have insertion Losses to deal with and the coaxial feedline between the transceiver and the duplexer may be of an odd length also adding to your problem causing a high VSWR. How about more information as to the individual pieces of radio equipment and the physical length of your coax cable between the transceiver and the duplexer.

Dan
WA9WVX
USING YOUR CALL WITH PORTABLE/MOBILE W1WBL 1 week, 5 days ago
Well this has been an ongoing problem for some time and I don't see it getting any better in the future. I've always tried to hang the district number on to my own call sign when ever I'm outside of my home .... even while operating within Illinois itself so the stations know I'm either at home, in the mobile or operating portable but that's just me. With the new No-Code operators, you're lucky to hear them I.D. let alone say WF7XXX/9 or whatever district their in.

The other interesting problem I've noticed on several different Forums is a person will have a call like, K9DEV and then ask a very stupid question, i.e. "Why can't I connect a PL-259 connector directly to a N Type connector?" The first thing I think about is, "Why is a ham that's been licensed this long asking this type of question?" I generally will go to the QRZ page and look up the call only to discover the call has been reassigned (vanity) to a newbie Technician licensee who didn't like their original call sign. I feel the FCC should have limited the new operators perhaps a minimum of 3 years before requesting a new call. I was never offered this luxury when I received my call in 1968 and now I wouldn't change it because everyone knows me by my call sign.

It's a big enough challenge just working all of the states let alone trying to figure out whether the op is where you want or need the individual to be. Between the ARRL and the FCC after the new operator receives their call sign, anything goes ... operating in SSB / CW portions of the bands, stepping on other operators, jamming, telling the Old Timers to Get the Hell off their Frequency (Huh?), I've even been chased off of FM Simplex for Rag Chewing.

I fear that the FCC is just waiting to take all of our bands away and sell them to the Commercial Business Radio Users and I'll definitely lay blame right on the ARRL for NOT taking the proper steps to educate the new Amateur Radio Operators. I've been a continuous ARRL member since I was first licensed in 1968.
Dan
Icom IC-71 6M rig schematic? W1VT on 27/1/15
According to the Radio Reference webpage: ICOM Manufactured the IC-71 Between 1968 and 1971 in Japan (was not available for export) and there's no information on the Manual or Schematics. Here's what the 6 m transceiver looks like: http://www.rigpix.com/icom/ic71.htm I even chacked on mods.dk website and It doesn't exist, one of Japan's most guarded secrets. Zach, I remembered that ICOM built a 2 m version, the IC-21A FM Only transceiver and perhaps you could find a Manual and a Schematic on this transceiver to do a comparison on the microphone wiring connections.

Dan
WA9WVX
Elmer needed - Galeton, PA area KB3MOW on 23/1/15
Hi Dave,

I found a few hams in the Galeton, PA but here's the guy I would recommend ADRIAAN A ARBEIDER, KB3GCQ of GALETON, PA. Adriaan has his EXTRA Class License so he would know what your friend needs to learn to become an Amateur Radio Operator and where the local EXAMS administrated. Perhaps Adriaan can point your friend towards a local Amateur Radio Club which normally has a wealth of knowledge for the Amateur Radio Community and your friend will be able to meet people who enjoy this hobby. I suggest that your friend to give Adriaan a call on the telephone before heading over to his home. If your friend cannot find Adriaan's telephone number, I'm supplying his address so your friend can stop by and inquire about ham radio. The address is 64 ALPINE LANE
GALETON, PA 16922.

Good Luck

Dan
WA9WVX
Yaesu's new digital hand held WA3FKG on 19/1/15
Great ... repeaters that die within 3 months, Yaesu's engineering team sure didn't do the homework on that design. Also seems strange that the repeater owners haven't tried to slip in a Henry continuous duty power amplifier to evaluate the system using that method. I wasn't aware that the Astro & Fusion aren't compatible but it may come down to using Motorola's technology and possible lawsuits involved over patent rights. It would also be interesting to test a pair of Fusion units using a Quantar repeater to see if the digital signals would pass on through. About the only thing that might stop the digital signaling would be the digital PL signaling codes (not DPL) as they are different. I remember reading on BatLabs where there was a company that could modify a MSF5000 to pass the Astro digital signaling. They were doing it for the State of Wisconsin maybe 8 or 10 years ago but I never heard what they found out by doing this modification.

Interesting that here in the U.S. our FCC determined to information the U.S. manufactures to design around a format that prevented more than one digital signal from passing through RF / IF stages to the receiver's audio stage and this holds true for digital TV reception too. If more than one signal is detected, nothing gets through to video or audio stages and if you happen to be near high power tension lines, they generate noise, the human ear using Analog can pick out the recovered audio whereas when you're using Digital the receiver is unable to differentiate whether the signal is digital or noise and stops anything from passing through to the audio stage.

Whereas in Europe, they devised a method to pass multiple signals through the receivers so the human could attempt to decipher the information. There's always some kind of a trade off when going from Analog to Digital especially when dealing with multipath as the 1s and 0s begin to flip too many times even with forward correcting digits and eventually the audio signal is garbled beyond use. On the other hand, when switching between Analog and Digital, the Analog signaling starts to develop picket fencing and eventually drops out, switching to Digital the recovered signal is 100% and it's been determined that using a higher gain antenna on a mobile will cause multipath conditions whereas using a 1/4 wave is much better. This even holds true for base station applications, less gain equals out to less multipath and the umbrella effect. I believe Digital is our future although many in the Amateur Radio community are fighting it tooth and nail much like when the hams started switching between AM to SSB, it took a little time but eventually 98% of the ham population use SSB on HF.

As far as the CDMA format, it runs circles around FDMA, TDMA and MFSK (D-Star) as it has the ability to detect signals further down into the noise, much like PSK-31 versus JT-65. All of these Digital technologies have been around for 50~60 years as I have a copy of the IEEE Radio Handbook and they are all described in that refertence book.

Dan
WA9WVX

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