From: Edward Parish (parish@Think.COM)
Date: Mon, 27 Sep 93 10:22:32 CDT
From: email@example.com (David Adams)
I have been thinking of doing something similar. A small tranceiver
or transmitter & receiver pair for 2M or 1.25M based on the
Motorola MC2833 for the transmitter and the MC3363 for the
receiver. I don't have any plans other than the fact sheets
that Motorola will give out with these parts, which will require
some modification. Has anyone tried anything like this? I think
it is one nice way to get a clean set up easy. (The boards came
with the chips.)
Do you still call it QRP when you are in VHF or UHF using < 5 watts?
(I will probably use 500 mw.) Low power is more of the norm here?
>From the fact sheet:
"The MC3363 is a single chip narrowband VHF FM radio receiver.
It is a dual conversion receiver with RF amplifier transistor,
oscillators, mixers, quadrature detector, meter drive/carrier
detect and mute circuitry. The MC3363 also has a buffered
first local oscillator output for use with frequency synthesizers,
and a data slicing comparator for FSK detection.
"*Wide Input Bandwidth -- 200 MHz Using Internal Local Oscillator
-- 450 MHz Using External Local Oscillator
"*RF Amplifier Transistor
"*Muting Operational Amplifier
"*Complete Dual Conversion
"*Low Voltage: Vcc = 2.0 V to 7.0 V
"*Low Drain Current: Icc = 3.6 mA (Typ) at Vcc = 3.0 V,
Excluding RF Amplifier Transistor
"*Excellent Sensitivity: Input 0.3picoV (Typ) for 12 dB SINAD
I'd say that was quite excellent.
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