RTC03 + BritX (All Band SSB) + Wide BPF/LPF + RF-PA20(4xIRF510), Its almost complete now

I got many request from friend to listed full set of transceiver module on ebay. Its already pushing me hard to realize it as soon as possible. Really hard to worked with my “pneumonia” problem since last year, I didn’t smoke but its happen to me because the air conditioner bacteria. I have a full day jobs as a SAP consultant. Yes, It mean lot to do but I tried to build it as soon as possible, and this post is the progress.

Nothing new design of this BritX, its just some variance of famous BITX, I just added and replace some component exist on local, plus an audio band pass filter to make better audio in receiving. Everything is generic design but, my big job is to make all module work together in all band, its not easy, at least for me. After some PCB design, prototype testing, testing and again testing. Its worked now.

The transmit test result with 13.8v supply with dummy load after lowpass filter:
1. 160m 16.3Watt
2. 80m  17.7Watt
3. 40m  25Watt
4. 30m  20Watt
5. 20m 24Watt
6. 17m  22Watt
7. 15m 19.3Watt
8 10m 8.3Watt

Yes power out is getting low on the 10m band but its common for IRF510 mosfet. Using RD16HHF or RD70HHF will be a better with flat RF output on all band. For my friend thats already bought my RTC03 on eBay, please be patient this complete set will be list there soon.


All Band BPF/LPF

All Band BPF/LPF

Dian Kurniawan

Final prototype BritX

BritX is a bitx based exciter board by Homebrewpartner/Hambuilder. This exciter have audio band pass filter on audio stage (300-2500Hz) to increase receiving audio quality. Two stage RF power amplifier (MPSH10 + 2N2218) added to make sure 1 Watt out from this exciter to drive Hambuilder standard final RF amplifier to produce 10-20 watt out.

Soon this item will available on eBay or tokopedia.

RTC01C Aluminum enclosure

Melengkapi rangkaian produk dari homebrewpartner/Hambuilder, berikut adalah aluminum enclosure dari radio transceiver controller (RTC) versi 16×2 character LCD yaitu RTC01C
Detail enclosure tersebut adalah sebagai berikut

*. Size/dimension 20cm (length) x 7cm (height) x 20cm (depth)
*. 4 pin CB connector for microphone + ptt
*. 1 potensiometer with power on switch
*. 1 RG antenna connector
*. 2 pin CB connector for power connector
*. 1 fuse holder
*. 1 heat sink

berikut adalah video test dengan menggunakan exciter BritX




HBR602 – Hambuilder Exciter using NE602 board

Salah satu exciter dari Hambuilder adalah HBR602. Exciter ini menggunakan IC Double Balance Mixer NE/SA602 yang sudah banyak dipakai dan menjadi standard homebrewer dalam merakit transceivernya. Walaupun buat saya NE602 bukanlah chip mixer pertama yang digunakan namun keunggulan serta kemudahan penggunaan mixer ini tetap menjadikannya favorit dalam membangun transceiver.  Sebuah mic amplifier dan ALC diharapkan dapat membantu mendorong keluaran dari exciter ini. Pada sisi pancaran, keluaran dari mixer akhir di perkuat dengan 2 tingkat TR MPSH10 untuk menggerakkan TR2N2218 pada final. Sehingga diharapkan dapat mengeluarkan paling tidak 1Watt level out. Pada sisi penerimaan sebelum penguat audio akhir di tambahkan audio band pass filter SSB (300-3000Hz) sehingga keluaran dari speaker sudah cukup baik untuk mengeluarkan demodulaasi SSB. Detail componen dari HBR602 adalah sebagai berikut:
*. IC TA2011S as mic amplifier and ALC
*. Mixer IC NE602/SA602
*. 4x Ladder filter 9MHz
*. IC LM741 first audio amplifier
*. IC NE5532 Audio Band Pass Filter
*. LM386 Audio Amplifer
*. TR MPSH10 first and second RF Amp
*. TR 2N2218 final exciter RF Amp

berikut adalah layout PCB untuk exciter ini

Hambuilder Team