Original Blog V4 SDR Dongle 500KHz-1.766GHz R828D RTL2832U 1PPM with USB-A Port + Suction Cup Antenna

Original Blog V4 SDR Dongle 500KHz-1.766GHz R828D RTL2832U 1PPM with USB-A Port + Suction Cup Antenna

Description:
The Blog V4 is an improved SDR dongle. Original dongles for RTL-SDR were originally designed for DVB-T HDTV reception, but they were found by hardware hackers to be useful as a general purpose SDR. The standard dongles are okay for DVB-T reception but are just barely suitable for SDR users/experimenters. The Blog V4 was redesigned with SDR user needs in mind, instead of DVB-T HDTV users who typically have more relaxed requirements.

Improvements on the V4 Model:
* Improved HF Reception. Now uses a built in upconverter instead of using a direct sampling circuit. This means no more Nyquist folding of signals around 14.4 MHz, improved sensitivity, and adjustable gain on HF. Like the V3, the lower tuning range remains at 500 kHz and very strong reception may still require front end attenuation/filtering.
* Improved filtering. The V4 makes use of the R828D tuner chip, which has three inputs. We triplex the SMA input into three bands, HF, VHF and UHF. This provides some isolation between the three bands, meaning out of band interference from strong broadcast stations is less likely to cause desensitization or imaging.
* Improved Filtering x2. In addition to the triplexing, we are also making use of the open drain pin on the R828D, which allows us to add simple notch filters for common interference bands such as broadcast AM, broadcast FM and the DAB bands. These only attenuate by a few dB, but may still help.
* Improved phase noise on strong signals. Due to an improved power supply design, phase noise from power supply noise has been significantly reduced.
* Less heat. Due to the improved power supply design the V4 uses slightly less current
and generates slightly less heat compared to the V3.

Drivers:
* The Blog V4 requires up to date drivers in order to function.
* Modern actively maintained software like SDR#, SDR++, SDR-Console V3 and GQRX already
* ships with up-to-date drivers.
* In Windows some older and unmaintained/abandoned software may require you to manually
update the drivers by replacing a .dll file.
* In Linux, you will need to update the system drivers.

Bias Tee:
* Original Blog V3 and V4 introduces a 4.5V bias tee that can be toggled entirely in software. The bias tee can continuously pull up to 180 mA of current. In software such as SDR# and SDR++ the bias tee can simply be activated by clicking on the "Bias Tee" checkbox.

Features:
* A software-defined radio dongle to fulfill your SDR wishes
* 1PPM TCXO
* USB T-Bias Power Supply
* Metal Housing
* T-Bias LED Indicator
* New PCB Front-End Design with R828D Chip
* Improved LDO: Low Noise and Reduced Heat
* SDR Technology: Compatible with Most Popular SDR Software
* Small Size, Big Power: Designed to Bring You Infinite Possibilities
* Frequency Range: 500 kHz to 1.766 GHz

Specifications:
* Tuner Chip: R828D
* ADC Chip: RTL2832U 8-bits
* Frequency Range: 500 kHz to 1.766 GHz
* Bandwidth: 2.56 MHz stable (up to 3.2 MHz with drops)
* Typical Input Impedance: 50 Ohms
* Typical Current Draw: 250 – 270 mA
* HF Implementation: Upconverter with 28.8 MHz LO
* Input Connector: 1x SMA
* USB Connector: USB-A Port
* Local Oscillator Stability: 1PPM TCXO
* Bias Tee: 4.5V, 180mA (software switchable)
* Enclosure: Aluminum
* Heat Dissipation: Thermal Pad to Aluminum Enclosure
* Front End RF Design: Triplexor with switchable notch
* Transmit Capability: None

Packing List:
* 1 × SDR Dongle V4
* 1 × Small Suction Cup Antenna

Packaging Details:
* Weight: 0.3kg