[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
This is a message from Mauno Ritola <ritola@xxxxxxxxxx>
to dx@xxxxxxxxxxxxx list. To unsubscribe the list, send
"unsubscribe dx" in mail body to majordomo@xxxxxxxxxxxxxx
Onko kellään kokemusta ko. vaiheistusvempeleistä pitkillä langoilla (1 km)
Suomen olosuhteissa? Mark Connelly ja Paul Ormandy väittävät, että ne
toimisi hyvin myös häiritsevän avaruusaallon kanssa, Stefan Wikanderin
mielestä niillä saa nollattua vain pinta-aaltosignaalin. Hintaa tulee
toista tonnia, joten olisi melkoinen riskisijoitus. Olikos tätä kukaan
testannut? Ohessa Paulin ja Stefanin kommentit:
>Review of MFJ-1026 Phaser
>Following numerous favourable reviews of the above unit, I was very keen to
>lay my hands on one and when fellow NZ DXer Steven Greenyer purchased one,
>I rang him to see what his opinion was. Steven was very pleased with the
>possibilities the unit offered and his recommendation was enough for me?
>now all I had to do was to save a little (more than a little actually!) and
>I figured it would be a late Xmas present to myself. However, Steven rang
>to tell me there was one available from a deceased ham's estate, and it
>took me no more than a couple of seconds to make up my mind! Many thanks to
>Steven for thinking of me (and to Arthur Williams for tracking it down in
>the first place!).
>US DXer Mark Connelly, had used one extensively and suggested several
>modifications so after some another 'phone call to Steven and some initial
>fiddling with the componentry, I set it up at home and was pleased with
>some of the results I could obtain using relatively short wires, i.e. one
>25 metre horizontal and a 6.5 metre vertical. I could phase out semi-local
>4XO 1206 just 100km away to reveal Fiji and make a significant hole in
>local Radio Waitaki 1395 allowing clear reception of NZers on 1386 and 1404
>? with the phaser off they were both splashed into oblivion! I was very
>keen to get to my Beverage site at Waianakarua and see how it performed
>with longer wires and the opportunity came over our Labour Weekend holiday.
>When I arrived and set up the gear, I was almost in too much of a hurry to
>connect up the phaser but quickly realised that I had all the cables etc to
>hook it up ? that turned out to be a great idea! Now, I bought this thing
>to phase out pests and even after Steven told me it was great for enhancing
>signals by adding the signals from the two aerials required (in this case
>two 310 metre Beverages, aimed at Florida, one terminated and one
>unterminated), I didn't know how good I it was for enhancing signals until
>I tuned in KCJJ 1630 and decided to use the phaser to try and remove the CW
>from the Ohura aero beacon on the same frequency. As soon as I switched the
>phaser on, and before I thought about phasing out the beacon, I gained an
>immediate lift in signal and the fact that both wires were directional
>towards the USA, meant that I didn't need to phase the beacon as the
>resultant aerial bearing was in the right direction for the desired
>station, and about 60 degrees off the pest.
>So once KCJJ was firmly in the bag, it was time to experiment! Over and
>over again I was amazed at how I could deal to a pest and clean up co and
>side-band channels. I was initially sceptical at how well it would work on
>skywave signals as past experience with the R-L-C type of phasers had shown
>they worked well on groundwave but not too hot on the former because of
>signal variation? to sum up just how well it worked on skywave, not only
>was I able to get significant nulls on almost every NZer tried, I was able
>to phase out KCCN 1420 in Hawaii and hear a mainland US station running
>To sum up, If you're a serious MW DXer, have access to long wires or
>Beverages and have contemplated buying something to give you an edge (maybe
>even a new receiver), you have just got to have one of these!
>Note: the modifications are necessary though anyone with some experience
>with a soldering iron would find it relatively easy. Also, there are two
>models, the MFJ-1025 and 1026, difference being that the 1026 comes with an
>active whip input which is probably not necessary, my recommendation would
>be to save yourself a few dollars and get the MFJ-1025. The latter is also
>easier to modify than the 1026 as it has standard discrete components
>rather than the surface-mounted variety used in it's "big brother".
>Lastly, a big "thank you" to Mark Connelly for making the modifications
>public and encouraging MW DXers to get into this unit. Anyone wanting
>details of these mods could contact me or check out Mark's data at the
>I have tested one I think it was the 1026 and it was no help for me. If
You have local >MV-station with groundwaves it is possible to attenuate
that station but in evenings/nights >with skywaves it´s impossible. I
connected it to my Beverages but I had no use of it, >lucky I didn´t buy
it only borrowed it from a friend.
>In areas as East Coast of USA with local stations on many frequencies I
think it can be >helpful.
>In daytime I could reduce Norway 1314 and other stations but trying to
listen to 1320 >then it was also reduced.
>Spend that money on longer Beverages or one more Beverage.