New HBR4HF is a compact 4 Band HF transceiver.
This simple and low cost radio is also suitable for entry level HAM to start do communication on HF band.
*. Assembed unit, tested and ready to use.
*. New 2.2 Inch TFT display,
*. 4 amateur band (80m, 40m, 30m sharing filter with 20m)
*. TX covering 80m/40m/30m/20m,
*. RX covering 3.5-14.5 MHz,
*. Step 1Hz, 10Hz,100Hz,1KHz,100KHz,
*. Output 13.8V 45-50W,
*. CW SSB modulation with 700Hz tone,
*. Display VFO A/B, mode, Smeter, Band, RX/TX.
*. IF Freq 11.059.200.
Band Coverage (programmable) :
80m (3.500.000 – 4.000.000)
40m (6.000.000 – 7.250.000)
30m (10.100.000 – 11.500.000)
20m (14.000.000 – 14.349.999)
*. Exciter complete set
*. DC chord
*. Condenser Microphone
store link New Hambuilder HBR4HF
Thank you for visiting our booth and spending time to review our product on “Bandoeng – Netherlands” Amateur Radio Fair 2018 (23rd-25th March)
Thank you for visiting us and making your first purchase! We’re glad that you found what you were looking for. It is our goal that you are always happy with what you bought from us, so please let us know if your buying experience was anything short of excellent. We look forward to seeing you again on next Hamfest.
Hambuilder HBR10HF using RTC03 as controller with 3.2 (320×480) TFT LCD. This item worked very nice, good color, viewing angle, speed (using 16 bit parallel data). But the main problem is the availability is a night mare. I using this TFT since early 2016 when I started to build the RTC03. Until now, this TFT already have 3 difference controller in market, with 3 difference firmware and specification and the worst is, seller from China that I bought this TFT did not know and did not help what kind controller or even give me any datasheet. I must find out by my self how to make this LCD works.
its look same but they have difference
when you look at their back side its HX8357C, V2.0 and blank, its all false
The HX8357C using ILI9481, the V2.0 using HX8357D and the blank one using HX8357C.
They need difference firmware and have difference command, and what I want to tell here is they have difference habit and speed. The blank one do not need hardware reset, but the other one intermittent required. This habit make your RTC03 sometime show the white or gray or even blank display on start.
How to solved this problem? actually is very easy (this bug already solved on our production line), please check the image below. We just need to added R-C reset delay. please see the picture below
and implemended like this on your RTC03, I choose R 10K and C 100nF.
Then if you get your RTC03 with intermittent gray or white screen on start you can applied this solution.
Similar condition with HBR10HF some buyer report carrier leakage on HBR4HF, same proble with his brother HBR10HF, BFO level is too big injected to modulator. Here’s the solution :
*. Replace BFO coupling from RTC01C with 100pf value
*. Tunning the preamp trimpot
*. Tunning the carrier balance
*. Adjust gate bias voltage (Vgate) into 3V
How ever please take note, power of the transceiver considering many thing not just increasing the final stage value. We must consider also the cabling, switch relay, PCB track and etc. HBR4HF and HBR10HF not designed to produce big power.
For older version of britx based (BITX) Hambuilder transceiver some buyer reported carrier leakage during transmit, its also affect the microphone gain setting. Please find the attached document for missing part and revision.
HBR10HF facelift :
*. Additional phone jack
*. Additional key jack
*. Additional pc audio in and pc audio out
*. 5cm Aluminum rotary knob for freq dial
HBR4HF facelift :
*. 2.0 inch TFT display replacing 16×2 char LCD
*, Additional phone jack
*. Additional key jack (back side)
*. 5cm Aluminum rotary knob for freq dial
This is the next Hambuilder transceiver (SSDR-100)
*. 3.2 inch TFT display
*. STM32F407 as display control and waterfall processing
*. ATMega8 (21st order FIR LPF processing)
*. Weaver SSB modulation and demodulation method using 2 x ADC MCP8201 and 2x DAC TDA1543
*. Embed CW decoder/Encoder using ATMega8
*. Bluetooth Access for setting, remote access and firmware upgrading
*. Android remote access Apps
*. 18 button access for band and control
*. 1 rotary main dial
*. 3 rotary for RIT/XIT, Bandwith Control and WPM
*. PC audio interface for digital mode
*. 80-100 Watt power out