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Kit Content
Kit comes with the following components:
Q5 : BOM (BILL OF MATERIAL)
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| Quartz crystals |
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| 1 |
Quartz |
10,116 MHz |
| Optional crystals available 3,560 MHz, 7,030 MHz, 14,060 MHz. |
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| Capacitors |
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| 1 |
C1, C4 |
100 uF |
| 2 |
C2, C3, C6, C10, C11, C12, C13, C14, C15, C16 |
100 nF |
| 3 |
C5 |
10 nF |
| 4 |
C7, C8 |
33 pF |
| 5 |
C9 |
330 pF |
| C9 value: 330pF (Q5-20, Q5-30), 680pF (Q5-40), 1nF (Q5-80) and 150pF for Q5-10 (28.188MHz beacon) |
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| Resistors |
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| 1 |
R1 |
10 R |
| 2 |
R2 |
4K7 |
| 3 |
R3 |
330R |
| R3 value: 1K5 (Q5-80) |
| 4 |
R4 |
100K |
| 5 |
R5 |
10K |
| 6 |
R6 |
390 R |
| 3 |
R7, R9 |
330 R |
7 |
R8 |
560 R |
| 8 |
R10, R11 |
6R8 |
| 9 |
R12 |
33 R |
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| RF Choke |
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| 1 |
L1 |
470 nH |
| 2 |
L2 |
47 uH |
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| Integral Circuit |
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| 1 |
74HC04N |
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| 2 |
Voltage Regulator |
7805 |
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| Transistors |
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| 1 |
T1 |
BC556 |
| 2 |
T2 |
2N3866 |
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| Diodes |
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| 1 |
D1 |
1N4148 |
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| Hardware |
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| 1 |
Heat sink for 2N3866 |
Aluminium |
| 2 |
Key jack |
3.5mm |
| 3 |
Antenna connector |
BNC |
| 4 |
PCB |
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Q5-30 Schematic Diagram
Click Picture to Enlarge
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Phase 1
Assembly of Oscillator
After the assembly of the oscillator, connect the input voltage and keyer.
Current consumption is approx. 40mA @12.8V.
You should be able to hear Q5 oscillator on your receiver.
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Phase 2
Assembly of PA section
Current consumption is approx. 110mA @12.8V. (approx. 130 mA key down).
Should you wish to increase output power replace R7 with 220R.
Under normal operation condition 2N3866 will get fairly hot - even while not transmitting.
However this is quite acceptable - 2N2866 is robust transistor capable of 3W dissipation at 200C.
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Genesis Q5 QRPP transmitter and modified for QRSS
by G6AVK
Click Picture to Enlarge
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Addendum 1: LP (Low pass) Filters
for Genesis Q5 QRP Transmitter
Designed by Dipl. Ing Tasi Siniša-Tasa YU1LM/QRP
In order to improve the output spectrum of Genesis Q5 QRP transmitter it is strongly recommended to add a low-pass filter.
Described below is practical realization of two simple, yet effective LP filters:
-monoband version consisting of just two T50-2 toroids and
-four band version for 80m, 40m, 30m, and 20m (four T50-2 toroids)
Monoband LP filter
Schematic diagram, components values and frequency amplitude responses are shown below.
Table 1
Table 2
Multiband LP filter
Schematic diagram showing multiband filter and switching arrangement.
For component values refer to Table 2.
The amplitude frequency responses for all 3 combinations:
I wish you success in your QRP and homebrewing endeavors! 73, Tasa
References:
1. www.yu1lm.qrpradio.com
2. www.genesisradio.com.au
3. Mini ring core calculator 1.2
http://www.dl5swb.de/html/software_for_amateur_radio.htm
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Addendum 2: Low-Pass and Control Board for Q5 is now available as stand-alone kit, LPC5.
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Need help? email:
info@GenesisRadio.com.au or
download Q5 instruction notes as PDF file
©2009. www.GenesisRadio.com.au
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