***de 9 Mexico 2 Ocean David Yesterday***
"Work active at 10m, 20m, 30m, 40m, 80m & also 2m band..all band worked at FM, SSB & PSK31 also CW modes..hpe can see u down the log & highly appreciated to work with me at the band"
"I'm worked seriously at 10m, 20m & 40m on my HF mobile station right now, please do not hesitate to answer if u hear my call, i'm always calling CQ DX during mobile"

Friday, December 17, 2010

ESSB??

ESSB stand for Extended for SSB mode..normally, the audio will be at range 2.0khz - 2.5khz..but with ESSB, can be more wide..like example up to 5.0khz & all this must be comply with rules by ITU..see table below :

STANDARD SSB MODES
(Subjective Descriptions)
BANDWIDTH
FREQUENCY RESPONSE
@ -6dB Points
ITU DESIGNATOR
(Technical Descriptions)
Standard SSB (Narrow)
2 kHz
400 Hz ~ 2.4 kHz
2K00J3E
Standard SSB (Medium)
2.4 kHz
300 Hz ~ 2.7 kHz
2K40J3E
Standard SSB
(Wide-1)
2.7 kHz
200 Hz ~ 2.9 kHz
2K70J3E
Standard SSB
(Wide-2)
2.9 kHz
100 Hz ~ 3.0 kHz
2K90J3E

EXTENDED SSB MODES
(Subjective Descriptions)
BANDWIDTH
FREQUENCY RESPONSE
@ -6dB Points
ITU DESIGNATOR
(Technical Descriptions)
eSSB (Narrow-1)
3 kHz
100 Hz ~ 3.1 kHz
3K00J3E
eSSB (Narrow-2)
3.5 kHz
80 Hz ~ 3.58 kHz
3K50J3E
eSSB (Medium-1)
4 kHz
50 Hz ~ 4.05 kHz
4K00J3E
eSSB (Medium-2)
4.5 kHz
50 Hz ~ 4.55 kHz
4K50J3E
eSSB (Wide-1)
5 kHz
50 Hz ~ 5.05 kHz
5K00J3E
eSSB (Wide-2)
6 kHz
50 Hz ~ 6.05 kHz
6K00J3E
Copyright © 2003

Logically, all sound/audio equipment have humming..& how to cut this humming from going to the transceiver while TX..in this case, i have made one box, we called 'iBox'..all humming will be cut by some electronics inside the box..at the first i read at manual Equalizer, its will produce about +/-18db humming..& i was thinking how to make this noise not coming to my transceiver..have a very nice iBox done by W2IHY..it's so great ibox but i think another way how to homebrew it..with some idea given from somebody..i go to electronic shop to buy the thing..lucky they have it..i done the iBox about 1 hour..then i try..fuhhh!!! the is no humming/RF coming..this iBox cut about +/-23db..very happy & finally try to get 9M2ZAK to assist me to setting the audio..thanks ZAK for help..hehe..i will upload here some audio recorded done by ZAK soon..




4ch Mixer, 31 Band Equalizer & Audio Balancer

iBox - cut +/-23db

View inside iBox

iBox by W2IHY

iBox by 9M2ODY..hi hi

Overall view

Antenna farm

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