A group of amateur radio operators based in Guwahati , VU3ZRI OM Ritu Mahanta ,VU3YPB, OM Paresh Brahma,VU3TQF OM Ravi Boro and VU3OKB,OM Pintu Sarkar went for a three days of demonstration cum amateur radio expedition from the bank of The Brahmaputra at the Nimati Ghat,Near Jorhat Town in Eastern Assam on November 27th (afternoon) to November 29th (morning).They used all homebrewed equipments i.e.transreceiver a all bands all modes transreceiver self bulit by VU3TQF & he named it fondly RAVIX ,40 BITX with 50W Max linear self built by VU3YPB, the dual band 40m/20m inverted V antenna.
They were on air mainly on 7070kHz lsb , 7145kHz lsb on 40mb from total noise free environment and operated on battery power .They had also listening experience on 20mb and 80mb.And also they on the night did give test call on 80mb on J3E mode and copied VU3OIP from Barpeta faint.VU3OIP also copied their calls from Nimati Ghat faint.I understood they had tested on others modes also.I heard their t their transmission on 40mb mainly on 7070kHz lsb in the morning, afternoon of November 28th and on the November 29th morning on 7070kHz lsb and very briefly heard on 7145kHz lsb with extremely strong signal strength.And another new amateur radio operator VU2EHJ OM Anupam Saikia from Sarupathar also monitored their transmission on November 28th afternoon with his SDR Receiver and copied all of them from Nimatighat with strong signal.
They made QSO with Guwahati based Amateur Stations viz.VU3XBP VU2DBM and Titabar based Amateur Station VU3WTS OM Bimal Chutia and he also visited the site of their camp and boosted their spirit of amateur radio expedition on November 27th late in the afternoon.They also contacted VU3HZT ,)OM Vijay Sonam in Naharlagun,Arunachal Pradesh ,now the only active HF amateur radio operator in the state and exchanged report with him on air.On 7145kHz lsb,I heard VU3TQF & VU3OKB made brief QSO with VU2FRD from Bhubaneswar etc .
And interesting part of the this expedition in Nimatighat on the concluding morning i.e.on November 29th..VU3TQF with his RAVIX made QSO with VU3OIP in Barpeta on 7070kHz and this is the best AM mode transmission of two amateur stations heard so far.Perhaps ideal location free from obstructions from the bank of the Brahmaputra might be the reason of such a good signal from Nimatighat with around 50W power.
Here is the audio clip link of the QSO of VU3TQF and VU3OIP on 7070kHz on A3E mode around 0821ist(0251utc) on November 29th.
And here is my rough notes(unedited version) of what I heard from Nimatighat.
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Place Of Monitoring:
Abhayapuri in Western Assam, India
Grid square:NL56hi
RX:Grundig Yacht Boy 80
Ext Antenna:Long Wire 75ft L 33ft H .75sq mm copper multistranded wire
end feeded with coaxial cable RG 6 &
connected to RX with a splitter box fitted balun
Date:November 28,2021
0757ist 7070kHz lsb VU3TQF 59 VU3XBP 22....
0807ist 7070kHz lsb VU3YPB MO Nimatighat Jorhat VU3XBP
0836ist No copy of VU3WTS...from Titabar here @7070kHz lsb .....all Nimatighat Stations 59..but audio slightly distorted ..rough audio
0814ist 7070kHz lsb VU3HZT 59 from Naharlagun VU3YPB MO 59 from Nimatighat...
November 28 2021
1614ist 7070kHz lsb VU3HZT 59 from Naharlagun VU3YPB MO 59 from Nimatighat...
1623ist VU2DBM 59 Blasting signal
Monitor's Note:
VU2DBM from Guwahati with his Icom IC 7300 with 40mb Delta Loop
with barefoot.or ..with linear...full power 300W..my speaker overload..had to use manual ACG i.e. volume control on 7070kHz lsb.
All Nimatighat stations ..59...
VU2DBM from Guwahati with his Icom IC 7300 with 40mb Delta Loop
with barefoot.or ..with linear...full power 300W..my speaker overload..had to use manual ACG i.e. volume control on 7070kHz lsb.
All Nimatighat stations ..59...
1629ist VU3WTS 33...@7070kHz lsb....now
Date:November 29,2021
0751ist
Heard strong signal from Nimatighat..VU3OKB..VU3TQF on test on 7070kHz lsb
0752ist On 7145kHz lsb VU3YSU VU2FRD S21HA..from Nimatighat standing by VU3TQF VU3OKB...
7070kHz lsb 0757ist(0227utc) 0814ist VU3YPB 59 VU3XBP 55
VU3ZRI 59 VU3TQF VU3OIP 56
0821ist
Strong signal ...good audio of VU3TQF...on 7070kHz on A3E mode ..from Nimatighat with VU3OIP ..at Barpeta..just copied
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I hope next time they will be on air from Majuli,the largest river island in the world & also on air on the way to Majuli while on boat in the Brahmaputra.
73
VU3WTI(Gautam Kumar Sharma)
Abhayapuri(Assam)(India)
