HBR4HF new board (BX series)

Shipping cost in this pandemic getting weird, we need to reduce the weight of our transceiver. We then re-built/re-engineering our transceiver to make it more smaller, compact, light weight but without losing capability or feature. This latest version of HBR4HF will also have some enhancement :
*. more power out with optional heat sink depend on power for HBR4HFX version. 100W on 80m, 80W on 40m, 50W on 30m, 30W on 20m
*. better component layout
*. better RF blocking to VCC
*. better cabling layout
*. firmware update for optional straight or iambic key for CW mode

 

ebay listing link : https://www.ebay.com/itm/174537452346

Hambuilder Team

HBR4CW 4 Band CW QRP transceiver

Beberapa rekan baik dari dalam dan luar negeri menyatakan ketertarikan akan perangkat QRP yang beroperasi hanya pada mode CW. Mereka terarik dengan design yang simple, kompak dan hemat daya. Setelah melakukan riset perbandingan dan pertimbangan ketersedian komponen, proses perakitan dan sebagainya, Hambuilder mencoba mendisain jawaban atas kebutuhan tersebut dengan spesifikasi sbb:

*. 16×2 LCD Display with auto-off back light
*. Atmel Microntroller
*. Si5351 synthesizer
*. built-in iambic firmware with WPM setting
*. optional menu for iambic or direct key
*. No mechanical relay used

Operation Band :
*. 40m
*. 20m
*. 15m
*. 10m

RX :
*. SA602 sebagai mixer dan demodulator dengan pertimbangan built in gain besar
*. Xtal ladder filter yang di desain dengan bandwidth sempit sesuai kebutuhan CW
*. opamp sebagai audio CW filter
*. RX gain setting, mungkin ada penambahan front end gain amplifier (MMIC?)
*. audio agc

TX:
*. 5W output
*. IRF510 as final transistor
*. 5 pole LPF

Sebetulnya tidak ada teknologi RF baru untuk desain ini, fokus pada simplikasi dan daya, plus harga.
Ada kemungkinan sekaligus battery pack. Atau di coba accessories lain sepeti SWR+ATU, QRP antenna? kita lihat perkembangan nantinya seperti apa, mudah2an peminat di lokal juga semakin banyak. Semoga bisa segera direalisasi

Hambuilder Team

HBR4HF latest upgrade

Hambuilder continues to improved the HBR4HF board, feature and specification time to time:
*. additional RF front end amplifier using MSA-0886 with 30db gain.
*. additional potensiometer for RX gain.
*. narrow band pass filter for RX/TX to increase selectivity on RX and to remove unwanted spur and harmonic on TX at the early amplifier stage cause of IF frequency.

80m

40m

40m

30m

20m

*. more matching impedance port on the circuit around the main mixer ADE-1.
*. independent band TX gain setting increase power out on the higher band. Now we got 15-20W on 30m and 20m instead only 10W on previous version.
*. firmware of controller now support IAMBIC key-er with programmable WPM.
*. new PCB with capable to using more bigger power transistor and bigger binocular transformer space, but we must consider the heat-sink size that will increase the shipping cost.

Actually we have many plan to upgrade and many new feature, but this Covid-19 pandemic situation we have a big logistic and supply chain problem. Its difficult to get the component, we must used express shipping company with so high shipping cost, and also our team must work from home. So we decided to choose the improvement with the minimal effort and with minimal cost we can afford for now. ..for example only 1 gr over-weight we must paid additional cost for 500gr, I hate this shipping company (D*L)

 

 


ebay link for HBR4HF HBR4HF on ebay

Hambuilder Team

 

HBRCB-200 (CB AM 200 channel) design

Rekan-rekan yang ingin kembali aktif di band 11m (CB) hambuilder sedang menyiapkan sebuah transceiver CB dengan harga yang sangat terjangkau. Unit ini akan menggunakan synthesizer dengan teknologi Si5351 dengan kendali microcontroller. Versi ekonomis ini hanya support mode AM dengan display 7 Segment dan kotak dari bahan plastik ABS.

Specification:
*. 200 channel, on 5 group 40 channel
*. AM mode
*. 4-5W power out
*. Si5351 frequency synthesizer
*. 2 digit 7 segment
*. ATMega16 microcontroller
*. plastic enclosure (W:80mm x H:40mm x D:120mm)
*. condenser microphone

Hambuilder Team

HBR1HF portable/outdoor version prototype

This is an outdoor version of HBR1HF with the optional battery pack. This portable version may use as a QRP portable or outdoor activity station (0-10W). How ever, it still provide adequate power at the maximum setting (25W).

Specification:
*. mono Band 40m or 80m
*. dimension W:170 mm, H:90 mm, D:70 mm
*. sensitivity 0.2uV
*. adjustable power out 0-25W
*. SSB, CW mode, shared filter (optional DSP)
*. Optional battery pack
*. estimated price USD 165-175 on Feb-March 2020
*. 16×2 LCD display
*. ADE-1 mixer
*. ATMega128 controller

*. specification may changed on production state

Hambuilder Team