Sunday, August 30, 2009
Saturday, August 29, 2009
Features (Manufacturer's hype):
- Precisely tailored frequency response delivers rich bass, clear mid-range and extended highs.
- Wide, padded headband provides ergonomic fit for superior comfort over extended periods.
- Closed-back, circumaural design rests comfortably over the ears and reduces background noise.
- Collapsible design for easy storage and portability.
- Legendary Shure quality to withstand the rigors of everyday use
- Bayonet Clip securely locks cable into ear cup.
- Replaceable ear cup pads included to ensure long product life.
- 3m (10ft) coiled detachable cable provides plenty of length and easy storage and replacement.
- Carrying bag protects headphones when on the go or not in use.
Dynamic neodymium magnet
Max. input power (1kHz)
5 Hz - 25 kHz
Net weight (without cable)
0.7 lb (317.5 g)
1.75 lbs (794 g)
Length of cable
3 meters (9.84 ft)
Type of cable
Detachable coiled oxygen-free copper
Gold-plated 1/8" (3.5 mm) stereo mini jack
Un-boxing and first impressions:
The manual is multi-lingual and easy enough to understand. The build of the headphone has a solid feel and does not feel flimsy.
Listening has not been executed yet and this will be done later with my Opera Consonance Cyber-30 (2A3 tube) headphone amplifier connected to the Elekit CD player. But I have already been advised by the supplier that these headphones will require 150 hours of burn in before they reach their full potential.
Saturday, August 15, 2009
339 pages / 9.2 inches
Written in Japanese
Publication : 2006
I just purchased this book, although in Japanese it does have allot of photographs and circuit diagrams which are extremely useful. This is also a bit of a collectors item as it is quite rare to be found outside Japan.
Saturday, August 8, 2009
Wednesday, August 5, 2009
It has the Kiron modification and has two optional filters...the 1.7khz SSB and 360 hz CW filter. The case as you can see is in excellent condition.
Sunday, August 2, 2009
Size 394 mm (15.5 in.) wide; 190 mm (7.5 in.) high,
inc. 25 mm (1 in.) feet; 457 mm (18.0 in.) deep.
Weight 27.2 kg (50 Lb.), max
Operating temperature 0 to 50øC (32 to 122øF)
Operating humidity 0 to 90% relative humidity
Operating altitude 0 to 3049 m (0 to 10,000 ft.)
Vibration 2 g's, 10 to 33 Hz
Primary power Strappable for: 105,115,125/210, 220, 230, 240,
250 V + 5%, 50 to 60 Hz; or 12 to 15 V dc,
negative ground:120 watts max in receive,
600 watts max in transmit
Frequency 0.5 to 30.0 MHz, tunable in 10 Hz steps
Modes u.s.b., l.s.b., a.m..and c.w.
Sensitivity (Soft uV 0.5 pV or better for 10 dB (s+n)/n, 2.0 to 30.0 MHz,
measurement) s.s.b. and c.w.; 1.0 uV or better for 1.8 to 2.0 MHz.
Selectivity (3 dB Selectable:
bandwidth) 8 kHz *1.7 kHz
*6 kHz *360 Hz
2.1 kHz *140 Hz
I.F. and image rej Greater than 60 dB
Intermod distortion -50 dB or better for two signals of -10 db mW each,
20 kHz apart
AGC Audio output variation not more than 8 dB for 4 uV to
200 mV open circuit r.f. input variation
Audio output Not less than 3 W into 4 ohm load, at 1 kHz, at not
more than 10% total harmonic distortion
Line audio output not less than -10 dB mW nominal in
to 600 ohms
Frequency response: 300 to 2400 Hz with not more than
5 dB variation
Frequency 160 through 10 m amateur bands, in 10 Hz steps
160 m 1.800 to 2.000 MHz
80/75 m 3.500 to 4.000 MHz
40 m 7.000 to 7.300 MHz
20 m 14.000 to 14.350 MHz
15 m 21.000 to 21.450 MHz
10 m 28.000 to 29.700 MHz
Modes u.s.b., l.s.b., and c w. (RTTY by AFSK on l.s.b.)
Output power 90 W pep, min (100 W, nominal)
In c.w. or RTTY: 50% duty cycle; key down 15 minutes,
max. Automatic turndown to 50 W after 10 seconds.
With optional blower kit installed, power is 100 W
average, 50% duty cycle, key down 1 hour max at 25øC;
30 minutes max at 50ø C for all modes.
Unwanted sig suppression
Carrier -50 dB or better
1 kHz ref -55 dB or better
Harmonics (all) -40 dB or better
Mixer products -50 dB or better
Third order distortion 25 dB below each tone of 2-tone test
Synthesizer accuracy Accuracy within + 5 Hz after 10 minutes warmup when
and stability 39.6 MHz and 455 kHz oscillators are set to within
+/- 3 Hz.
Stability within +150 Hz over temperature range of 0
to 50øC (32 to 122øF) if oscillator's set within
10 Hz at 25 øC (77 øF)
Antenna Impedance 50 ohms, nonreactive. (Full transmitter power output
with v.s.w.r. of 2:1 or less. Automatic power output
turndown with v.s.w.r. greater than 2:1.)
Microphone Low or high impedance, dynamic; 3.3k nominal
Line 600 ohm, unbalanced; 40 mV input sufficient for full
r.f. power output