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This circuit design follows a standard well-proven approach based on various kits available on WWW modifications have been done.
Features & specification
7.000 -7.300MHz frequency receptions.
AM/SSB & CW.
Sensitivity Approx. 0.5μV.
DDS VFO of tuning step 1, 10,100Hz &1,10,100KHz.
16x2 LCD Readout
Selectivity 4-pole variable-bandwidth crystal filter, approx. 200-2000 Hz
Switchable attenuator (10 & 20dB).
0.1Watts Audio Output/ Stereo pin.
Size 155 x 105 x 30 mm.
Weight : 425 gms
Available as a DIY kit or fully assembled high quality components for reliable operation.
VIDEO DEMO 30Mins - NEW on 5/2/2013
http://www.youtube.com/watch?v=eQbHeEB-kegor 6 mins sample play here
VIDEO DEMO - OLD
* Speaker,Antenna & power supply not included.
* Shipment cost extra* At present shipment only in India
Specification , design and cost subject to change without prior notice.
This product Kit is sold "as is " without warranty or guarantee of any kind.
STOCK Ready against order (2/2/2013)
Dear Ganesan, Many thanks for taking up this interesting project and information here. This will be use full for many swls & Hams. Greetings to you, 73's krish, vu3nkkReplyDelete
Please publish the Price of Kit and Assembled Rx. Becuase it's will be the first thing ham/swl want to know.
CONGRATULATIONS DEAR GANESAN. ITS A DREAM PROJECT FOR SWLs AND BEGINNERS. THANKS FOR TAKING HIGH PRIORITY TO POPULARISE HAM RADIO THRU THIS TYPE OF ACTIVITIES.ReplyDelete
Congrags on the project.
It was nice to meet you at the RSB meet.
VU3VOC / AK4EC / A92GK
Thanks for bringing the board to our VU2RSB silver jubilee eyeball Ganeshan.ReplyDelete
Great job and very professional work. Please make it into a kit available to
all the hambrewers to build and have fun!
Folks, Ganeshan has also designed and built cube sat modules and as his
signature work they are very professional! A transceiver kit will be great!
Message forwarded from HamBrewers@yahoogroups.com
thank you ZAP,thank you friends
thank you very much for your all encouragement
this will force me to do better and more
I must admit that the performance is superb.Is there any possibility that I can also buy a kit. 73-ReplyDelete
Thanks for this interesting project and information here. This will be use full for many swls & Hams. Pongal Greetings to you,
sir plz tel me full assembal kit and cabine priseReplyDelete
my e mail is email@example.com
i would like to have a kit....ReplyDelete
thanks, for digital readout receiverReplyDelete
It is my dream one LRR40 - 40Meter SSB/CW Receiver..but out of stock..ReplyDelete
Can you let me have the cost for the LRR 40 40 Mtr Rx fully assembled.
My Email -
Congrats OM Ganesan, VU3GEK-KJ6LRR ! I would love to buy the kit and assemble. But I think mounting/soldering the SMD components would be a bit tricky for me as I have never tried [ but interested to learn]..With the SMDs mounted by you, I would love to try assembling the rest of the kit ...ReplyDelete
Tnx es vy best 73 de Sandeep VU2MUE [ Previously VU2MSY ]
Today 2nd Feb 2013, I have received 1st LRR40 & tested with my inverted V Antenna.ReplyDelete
The calibaration is perfect & RX performance is comparable with my Yaesu FT 747 commercial rig.The attunauters 10dB & 20dB are found useful. All the very best for his good work which is required for budding Hams & SWLs.
73s, de, krish, vu3nkk
Very good receiver small and compact best for mobile use, please develope with transmiting function,best of luck ,vu3nkk had given live comparision between ft747 in vhf,vu3nkk feels the attunaters is good,my self also feel it perfom best as commercial,All the best.
let me know the cost pleaseReplyDelete
What is the price? Please. Is it possible to collect in Maha meet?
73s bye de saradhy VU2NVU from NELLORE.
I would also like to know about the price and shipping cost. 73 de vu3inj, Email:- firstname.lastname@example.orgReplyDelete
If this radio can be used for Hams, Is there any provision to mute or switch off when i am transmitting?
today I have tested my receiver.. reception is excellent..tnk u VU3GEKReplyDelete
We r expecting a Tx soon for accompanying this Rx
It was my first 40 meter reception on a superhat receiver.(17th Feb 2013)ReplyDelete
The Receiver was performing great!!
I am a novice to the Ham Radio receivers and antennas, after doing a whole day work on antennas and making and destroying 4-5 antennas, finally i used an inverted vee for this. (approx. 40 ft. high, 10 mtrs on both legs, using 1 sq mm 1100 v electricity wire).
The ATT's 10dB & 20dB are very useful.
Thanks again N.Ganesan for choosing such a agile courier service!! approx. 2709 Km and on 4th day the parcel was in my hands!! and thanks again for his help for the Inverted vee's guidelines.
The LRR-40 is really a great work, Greetings to N. Ganesan and all the Operators/SWL's
A video recording of the reception is available on youtube.
I got my LRR-40 yesterday and since then i have been glued to it leaving my other equipment aside. The performance has been at par with You Tube presentation. I am really impressed by its performance and look. It will adore my shack. I expect more such extra-ordinary efforts by Ganesh.All the best-ReplyDelete
Atanu Dasgupta, VU2ATN
My Dear OM Ganeshan,ReplyDelete
Yesterday, being Sunday, I spent maximum time with your LRR-40 ..
The Test Report arrives like 599 + 1000 dB
Really excellent workmanship and superb gain, selectivity and s/n ratio
So much impressed.
Keep it up the good work. You can be the inspiration for the OT hams
like me who becomes LAZY after getting Icom, Yaesu or Kenwood rigs on
their desktops. You are the inspiration and catalysts to say.."Wake up
SID..!!" to all radio amateurs who have in-built home-brewer inside
I think this is the right definition to describe VU3GEK
Adhir Saiyadh VU2MAU
Padmaja (MIKY) Saiyadh VU3MAU
any news? 73 de SV2CLJReplyDelete
Dear ganesh, thanks for the rx. the volume is very low .weak stations reception is poor and i hered w land stations in my kenwood ts 480. but didnt hered in LRR 40 @ same time. why? please publish the circuit or e-mail.(not for homebrewing, only 4 studying).Noice is low compared with kenwood...73 de vu2vidReplyDelete
1) This receiver is designed for battery operation , audio out put will be only around 0.1Watts,you have to use only Head phone, if you need louder audio add external audio power amplifier, speaker etc.
2) for Weak station reception add low noise pre-amplifier , for strong station reception remove the pre-amplifier and you can use 10dB and 20dB Attunator combination.
these are the limitations of this receiver.
Good quality external antenna is recommended for better reception quality
by the way
ts 480 is Rs30,000/- and this receiver is Rs2300/- only
this receiver has its own limitations and limited specification.
Till date AUG /2013 Total 79 receivers have been shipped for SWLs to monitor the local QSO.
VU3GEK - KJ6LRR