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Date Posted by Category User IP

2017-11-17 (UTC)

WA2FSO

HF Radios

cpe-74-134-36-251.kya.res.rr.com

TEN TEC Century 21 Analog

This is fully operating CW
transceiver, with copy of manual.
Input is 70 Watts, (more Info)
http://www.hamradioqrp.com/2015/1
0/ten-tec-century-21-cw-only-rig-
ahead-of.html .The PTO is Solid
And good, I have used it on the
air, Now the dial is a little
warped, not affecting operation,
will need slight calibration, but
is usable as it sits, you will
need plastic tuning tools. I
would have done it but no signal
generator. Asking $150.00 Plus
actual shipping based upon zip
code. This will be as-is sale due
to a few bad apples. I am
shipping a working Ten Tec 570.
Personal Check Or P.O. Money
Order.
General
Frequency Coverage: 3.5 to 4.0;
7.0 to 7.5; 14.0 to 14.5; 21.0 to
21.5; 28.0 to 28.5; 28.5 to 29.0
MHz. (Crystal not supplied for
28.5 to 29.0 MHz, but available
as accessory, Model 273.) Note -
Early models only included
crystals for 3.5, 7, and 14 MHz
bands. Crystals for 21 Mhz and 28
Mhz bands were available as
optional Models numbers 271 and
272.
VFO Frequency Stability: less
than 20 Hz change per degree
Fahrenheit, averaged over a 40o
change from 70o to 110o, after 30
minute warmup. Less than 20 Hz
change from 105 to 125 VAC line
voltage.
Direct Frequency Readout:
Marked in 5 kHz increments from 0
- 500 kHz, MHz markings for each
band displayed.
Tuning Rate: Approximately 17
kHz per revolution of main tuning
knob.
Power Requirements: 105 - 125
VAC, 50-60 Hz. 10 watts receive,
100 watts transmit.
Semiconductors: 25 transistors,
26 diodes, 5 integrated circuits.
PC Boards: 4 plug-in types, 6
integral.
Construction: Rigid aluminum
chassis and sub-panels. Aluminum
case. Grey front panel, black
textured vinyl cover.
Dimensions: HWD 6.125" x 12.5"
x 12"
Weight: 15.5 lbs
Receiver
Sensitivity: 1 uV or less for
10 dB S+N/N.
Selectivity: Three position;
0.5, 1.0, and 2.5 kHz.
VFO Frequency: 5.0 to 5.5 MHz.
Double Direct Conversion.
Antenna Input: 50 ohms,
unbalanced.
Audio Output: 1 watt @ 8 ohms,
less than 2% harmonic distortion.
Built-in speaker; PHONES jack.
Offset Tuning: Approximately
+/- 5 kHz, defeatable with ZERO
BEAT switch.
Transmitter
DC Input Power: 70 watts
RF Output Power: 25-30 watts,
typical.
Output Impedance: 50 - 75 ohms,
unbalanced.

T/R Switching: Full break-in cw
with PIN diode switch.

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