http://www.oocities.org/va3ttn/Compr.zip          DSP Speech Compressor        1,547,300 bytes
http://www.oocities.org/va3ttn/Tant.zip           Antenna Temperature & G/T v1.2  11,882 bytes

http://www.oocities.org/va3ttn/OrionNR1.373b5.zip Orion I NR Testing             454,743 bytes
http://www.oocities.org/va3ttn/SWRloss.pdf        TL Loss due to SWR              71,563 bytes
http://www.oocities.org/va3ttn/UsingOrionRX.pdf   Using Orion's receiver          43,638 bytes

An "ordinary" choke has multiple alternating parallel and series resonances.
Parallel resonances are displayed as dips, and series resonances as peaks.

http://www.oocities.org/va3ttn/YT6A-choke-1.jpg   Picture of YT6A's HF amp choke  69,259 bytes
http://www.oocities.org/va3ttn/YT6A-choke-2.jpg   Choke impedance sweep           69,861 bytes

* * *

http://www.oocities.org/va3ttn/wpxssbbg.pdf     Prognoza prilika za WPX SSB  108,293 bytes
http://www.oocities.org/va3ttn/Kup.zip          Kup

http://www.oocities.org/va3ttn/CQ.wav           CQ 180 zn/min, 880 Hz, 1 ms   11,067 bytes

http://www.oocities.org/va3ttn/ref.wav          referentni nivo + 0 dB       160,490 bytes
http://www.oocities.org/va3ttn/refplus1db.wav   referentni nivo + 1 dB       160,490 bytes

http://www.oocities.org/va3ttn/snimak3.mp3      Grletov snimak               358,922 bytes

Uporedjenje signala YT9X i YT1NT na 21 MHz
za vreme ARRL DX SSB, 02.03.2003 oko 14:30 UTC.

YT9X:   800 W, 4 el. QUAD (visina ?), na brdu visine 800 m, pored Sevojna
YT1NT: 1250 W, dipol na 14 m iznad zemlje, na terasi, 3 m od zgrade, na periferiji Nisa.

YT1NT nije radio u contestu, vec samo zvao CQ 15 i radio obicne veze.

Snimio Grle VE3EY u Torontu na FT1000MP, AGC iskljucen.
Jedan VFO podesen na YT9X, drugi na YT1NT.
Za vreme snimanja naizmenicno prebacivano sa jednog VFOa na drugi.

Iz oscilograma signala se vidi da je signal YT9X prosecno jaci za oko 4 dB u vrhovima govora.
Posto je YT1NT TX bio jaci za 2 dB, sledi da je kombinacija lokacije i antene YT9X
bila bolja u ovoj probi za oko 6 dB od lokacije i antene YT1NT.

Kompresija dinamike govora je bila znacajno bolja kod YT1NT.
Efektivna razlika je cesto veca od razlike u jacini signala,
i tada signal YT1NT, iako slabiji u vrhu, zvuci jednako ili glasnije od YT9X.

http://www.oocities.org/va3ttn/snimak1.mp3      snimak YT1NT i YZ1AU      176,797 bytes
http://www.oocities.org/va3ttn/snimak2.mp3      snimak YT1NT i VE3EY      299,050 bytes