[UK-CONTEST] OT-Dxpedition

Clive Whelan clive.whelan at btinternet.com
Thu Apr 2 15:53:25 PDT 2009 

I think the 756 PROIV was a special edition only on sale on Tuesday of 
this week. I know it was real as  both the Llamedos and Sans Serif 
Islands DXpeditions used them to good effect. Because of a last minute 
hitch all the CW ops got left behind on shore and all CW QSOs ( over 1 
trillion I believe) were made using the built in CW reader. Whatever nest?

73


Clive
GW3NJW


peter Jackson wrote:
> I undersatnd there is no such rig as the pro iv. The IC7600 replaces the 
> pro111. I like the look of it anyone bought one yet?
> 73 Pete G3KNU
> ----- Original Message ----- 
> From: "Adrian Rees (MW1LCR)" <rees.a at btconnect.com>
> To: "'Clive Whelan'" <clive.whelan at btinternet.com>; "'UK Contest Reflector'" 
> <uk-contest at contesting.com>
> Sent: Thursday, April 02, 2009 4:26 PM
> Subject: Re: [UK-CONTEST] OT-Dxpedition
>
>
>   
>> Came across this one as well........on a US List.
>>
>>
>> Subject:  Icom 756 PROIV is coming out/CW Support?
>>
>> Looks like more of the great stuff you would expect from ICOM.  Better 
>> receive characteristics, brighter display, and integrated support for 
>> digital modes like PSK etc.
>>
>>
>>
>> What I don’t understand is the following statement:
>>
>> Optional CW module allows for unparalleled CW Integration through computer 
>> software.  CW operators will no longer need to know CW to operate this 
>> legacy mode.
>>
>>
>>
>> Does this mean that the ICOM PRO IV will no longer support CW?
>>
>>
>>
>> 73 K6WRJ
>>
>>
>>
>> Below is the complete text:
>>
>>
>>
>> The 756PRO Series Legacy Continues to Grow
>>
>> Icom and the renowned IC-756PRO series continue to make ham radio history:
>>
>> First 64-bit floating point DSP transceiver
>>
>> First transceiver with customizable filter shapes. There were no optional 
>> filters to buy, for none were needed.
>>
>> First mid-class HF transceiver with +36dBm-class third-order intercept 
>> point*
>>
>> First amateur HF transceiver with a large TFT color LCD
>>
>> For the new IC-756PROIV, Icom’s combined the cutting-edge receiver 
>> technology of the IC-7800 with the familiar ergonomics of the IC-756PROIV.
>>
>>
>>
>> Take your DXing to the next level with Icom’s IC-756PROIV.
>>
>> (*in the 14MHz band)
>>
>>
>>
>> The 756PRO Forth Generation’s Features
>>
>> Receiver gives +36dBm third-order intercept point*
>>
>> Using receiver design techniques introduced in the IC-7800, Icom’s 
>> engineering team focused on producing a distortion-free, 
>> high-dynamic-range. To achieve this goal, Icom used higher-grade 
>> components in vital receiver sections of the IC- 756PROIV.
>>
>> * Under the condition of receive frequency 14.2MHz, input frequencies 
>> 14.3MHz and 14.4MHz, Pre-amp OFF, mode USB BW: 2.4kHz
>>
>>
>>
>> Large inductors
>>
>> The IC-756PROIV uses large inductors instead of small coils in the 
>> bandpass filter (BPF) stage, because small coils sometimes cause magnetic 
>> saturation in the BPF stage. Large inductors can handle both strong 
>> signals and weak signals with lower distortion.
>>
>>
>>
>> Low-distortion BPF switching
>>
>> The BPF switching circuitry is one of the critical points in a receiver 
>> where distortion can be produced by strong out-of-band signals. Distortion 
>> at this early receiver stage then propagates throughout the remaining 
>> stages and cannot be removed by signal processing. The IC-756PROIV uses 
>> low distortion diodes with wide frequency characteristics that prevent 
>> formation of distortion components in the BPF stage.
>>
>>
>>
>> Fundamental-type 64MHz roofing filter
>>
>> The IC-756PROIV uses a fundamental mode monolithic crystal filter for the 
>> roofing filter. Although it’s more expensive than overtone-mode filters, 
>> the fundamentalmode filter has a better shape factor and is less 
>> susceptible to intermodulation distortion under strong signal conditions. 
>> This is the same 15kHz crystal filter used in the IC-7800 roofing filter 
>> circuit.
>>
>>
>>
>>
>>
>> Two newly designed preamplifiers
>>
>> To minimize distortion and maximize dynamic range, the IC-756PROIV 
>> preamplifiers use the same basic circuit design as the IC-7800 
>> preamplifiers. Preamp-1 is a noiseless feedback design, with push-pull 
>> amplifiers. This design has a high intercept point and covers a wide 
>> frequency range. Preamp-2, which uses bipolar transistors for higher gain, 
>> is ideal when you use separate low-efficiency receiving antennas such as 
>> small loops or Beverages.
>>
>>
>>
>>
>>
>>
>>
>> Real time spectrum scope with mini scope function
>>
>> The real time spectrum scope is now an indispensable tool for top 
>> performing HF radios. The IC-756PROIV’s spectrum scope adds a mini scope 
>> function, as requested by many PROII users. The mini scope allows you to 
>> monitor the scope screen while you use other function menus. For example, 
>> you can monitor the scope screen even while you are changing the IF filter 
>> shape and passband width. The scope range can be set in 4 steps ±12.5 kHz, 
>> ±25 kHz, ±50 kHz and ±100 kHz, centered onthe receiving frequency. In 
>> addition, the spectrum scope has 3 attenuator levels (10dB, 20dB and 
>> 30dB).
>>
>>
>>
>>
>>
>>
>>
>> Eight-channel RTTY TX memory
>>
>> The IC-756PROIV has 16 channels of RTTY transmit memory. You can edit and 
>> send up to a 62 character message for each memory channel without a PC or 
>> other external unit*. The transmit memory is displayed on the screen so 
>> you won’t send the wrong message. The built-in RTTY demodulator and 
>> decoder allow you to check the callsign of the station on the air 
>> instantly. A PC or external unit is not also necessary.
>>
>> * When writing and sending RTTY messages on site, a Terminal Unit, TNC or 
>> PC and dedicated software is required.
>>
>>
>>
>> Adjustable SSB transmit BW
>>
>> The SSB transmit bandwidth is selectable from 100, 300 and 500Hz at the 
>> high-pass edge, and 2500, 2700 and 2900Hz at the low-pass edge 
>> respectively. 3 types of high and low combinations can be stored in the 
>> memory. In addition, the built-in audio equalizer has separate bass and 
>> treble adjustments for a total of 121 combinations, so you can tone your 
>> voice up or down as you want. With this flexible DSP-based waveform 
>> shaping, you can tailor your transmit audio quality to suit your operating 
>> style.
>>
>>
>>
>> Other new features
>>
>> New 60 meter band coverage, equivalent transmit power and antenna tuner 
>> capabilities to the other bands.
>>
>> (U.S.A. version, USB mode only)
>>
>> 2 clocks show different time zones at once, such as local and UTC time
>>
>> Inherited Properties From The 756PROII
>>
>> 32-bit floating point DSP & 24-bit AD/DA converters
>>
>> The heart of the IC-756PROIV is the proven combination of the 32-bit 
>> floating point DSP and 24-bit AD/DA converters. This powerful combination 
>> supports many digital processing features exclusive to the IC-756PROIV, 
>> which cannot be achieved with traditional analog processors. The 24- bit 
>> AD/DA converter has an ultra-wide dynamic range. The receiver delivers a 
>> distortion- free, clear sound in any signal condition, from a weak signal 
>> to a strong full power station.
>>
>>
>>
>> AGC loop management
>>
>> The digital IF filter and manual notch filter are included in the AGC loop 
>> driven by the DSP. This architecture completely eliminates“AGC pumping” 
>> caused by adjacent strong signals out of the IF filter passband. In 
>> addition, programmable AGC time constants* (slow, medium, and fast 
>> presets) give flexibility and speed needed for working the pile-ups.
>>
>> * Except FM mode.
>>
>>
>>
>>
>>
>>
>>
>> Dual watch
>>
>> The dual watch* function allows you to receive 2 signals on the same band 
>> simultaneously. You can listen to your favorite net while keeping an eye 
>> or ear on the DX station. The signal strength balance between the main and 
>> sub frequencies is adjustable from the balance knob.
>>
>> * Same band only
>>
>>
>>
>> Digital twin PBT
>>
>> DSP-based twin passband tuning (PBT) helps eliminate interference by 
>> changing the IF filter bandwidth and/or shifting the center frequency. 
>> With the digital IF filters, the PBT performance allows you to cut away 
>> all the interference and noise to hear the actual signal. The LCD 
>> indicates the twin PBT conditions across the top of the screen.
>>
>>
>>
>> Manual notch function
>>
>> An incredible 70dB of attenuation is at your command with the manual 
>> notch. Eliminate strong adjacent signals or beat tone noise, without 
>> reducing the performance of the AGC gain.
>>
>>
>>
>> Sharp and soft filter shapes are selectable for SSB Digital mode
>>
>> Select an appropriate filter shape that favors your operating style or 
>> band conditions. Independent SSB and DIGITAL filter gives you the 
>> flexibility.
>>
>>
>>
>> Sharp and soft filter shapes are selectable for SSB and DIGITAL mode
>>
>>
>>
>> Select an appropriate filter shape that favors your operating style or 
>> band conditions. Independent SSB and DIGITAL filter gives you the 
>> flexibility.
>>
>>
>>
>> SSB Sharp Filter
>>
>> The perfect filter shape factor when signal fidelity or pinpoint accuracy 
>> is needed! A sharp slope from the filter edges gives full audio response 
>> while eliminating any adjacent interference.
>>
>>
>>
>> DIGITAL Sharp Filter
>>
>> The “too good to be true” DIGITAL filter! The steep filter skirts — only 
>> 200Hz from the –6dB to the –60dB points — allow you to hear a weak DIGITAL 
>> signal that is surrounded by strong ones. DX hunters will have to try this 
>> one to really see the magic of the Sharp DIGITAL filter.
>>
>> SSB Soft Filter
>>
>> The perfect filter shape factor when trying to pick out a weak signal! The 
>> rounded filter shape resembles a traditional analog filter, by rolling off 
>> the high and low ends of the passband. Although maintaining the steep 
>> filter skirt characteristics of a digital filter, the soft filter 
>> increases the signal-to noise ratio of the intended signal.
>>
>>
>>
>> DIGITAL Soft Filter
>>
>> Running a pile-up has become easier with the soft DIGITAL filter. By 
>> broadening the filter skirt, the characteristics of the soft filter 
>> perform much like a mechanical filter without the ringing.
>>
>>
>>
>>
>>
>> Automatic notch function
>>
>> Eliminate annoying AM carriers, amplifier or radio tune up interference 
>> with a push of a button. The automatic notch tracks 2 or more interfering 
>> signals simultaneously without intended signal loss or distortion. Very 
>> helpful on 80 and 160 meters.
>>
>>
>>
>> Adjustable noise reduction
>>
>> The 32-bit DSP processing power produces real results by separating signal 
>> components from the noise with the variable Noise Reduction. By 
>> suppressing the noise components, an outstanding Signal to- noise ratio is 
>> achieved, providing clear, clean audio in all modes without distortion of 
>> the target signal.
>>
>>
>>
>> Optional CW module allows for unparalleled CW Integration through computer 
>> software.  CW operators will no longer need to know CW to operate this 
>> legacy mode.
>>
>>
>>
>> Adjustable noise blanker
>>
>> Reduce annoying QRN from pulse-type noise such as engine ignition systems 
>> and sparking appliance motors, with the fully adjustable (101 steps) noise 
>> blanker.
>>
>>
>>
>> Digital voice recorder
>>
>> The Digital Voice Recorder (DVR) is a very convenient function for 
>> contests, DXpeditions and even normal operation. Record your callsign, CQ, 
>> or other station information into four memory locations. A total of 90 
>> seconds is available for the four memories, with each memory channel being 
>> soft partitioned to allow custom recording sizes. A quick push of the 
>> front-panel DVR button allows you to record received signal into the R4 
>> memory. The playback automatically mutes the receiver for clear playback 
>> of the previous 15 seconds of recorded audio. The perfect feature for 
>> those contest operators wanting to improve their UBN.
>>
>>
>>
>> DIGITAL memory keyer
>>
>> A must have feature for the DIGITAL operator, the internal memory keyer 
>> provides 4 memories for programming station information, calling CQ and 
>> callsign. Each memory has a capacity of 55 characters, as well as other 
>> time saving functions such as automatic automatic repeat, serial contest 
>> number autocounter, and morse cut number functions.
>>
>>
>>
>> Digital RF speech compressor
>>
>> The IC-756PROIV utilizes the 32-bit DSP for the RF speech compressor 
>> providing the maximum punch without the fuzzy sound. Great for breaking 
>> through the noise and hash to complete the QSO.
>>
>>
>>
>>
>>
>>
>>
>> Highly stable transmitter
>>
>> For a big, clear signal, the IC-756PROIV uses two 2SC5125 transistors in 
>> the PA Unit. Along with superior IMD characteristics, these transistors 
>> have plenty of power to allow for 100W full duty cycle operation. Advanced 
>> design considerations along with an aluminum, die-cast frame, and large 
>> cooling fan, help to stabilize the PA circuit providing full duty cycle 
>> operation.
>>
>>
>>
>> High stability crystal unit
>>
>> The IC-756PROIV incorporates a high-stability master oscillator, providing 
>> ±0.5ppm (–10ºC to +50ºC). A must for RTTY, SSTV or M A R S operation.
>>
>>
>>
>> Triple band stacking register
>>
>> Hop around the band with Icom’s exclusive triple band stacking registers. 
>> Each band remembers the last 3 frequencies, mode and other settings used.
>>
>>
>>
>> SSB data communication
>>
>> When the IF filter passband is reduced to 500Hz or less in SSB/SSB data 
>> mode, special bandpass filters are automatically selected. The BPF 
>> automatically sharpen for better rejection of interfering signals. Along 
>> with the BPF, the IC-756PROIV automatically turns off the compression and 
>> enables the 1/4-tuning step for easier operation and more accurate tuning. 
>> Perfect for PSK31, SSTV or other AFSK modes.
>>
>>
>>
>> 5-inch TFT color LCD
>>
>> Enjoy the full 5-inch TFT color display. The IC-756PROIV has 8 colors of 
>> display settings and 7 types of font settings. Various information is 
>> indicated on the color LCD, separated into an upper and lower screen. The 
>> lower screen can spread vertically to increase the information viewing 
>> area.
>>
>>
>>
>> Other features
>>
>> [ Antenna and receiver ]
>>
>>
>>
>> Built-in highspeed auto antenna tuner
>>
>> 2 TX/RX antenna connectors and RX antenna connector
>>
>> 30kHz–60MHz general coverage receiver*
>>
>> Built-in RX attenuator (6/12/18dB)
>>
>> Twin peak audio filter for RTTY reception
>>
>> * Depending on version
>>
>> [ Transmitter ]
>>
>>
>>
>> Tx monitor function
>>
>> Tone encoder
>>
>> VOX operation
>>
>> All mode power control
>>
>> External Control for Voice Memory and Memory Keyer
>>
>>
>>
>> [ Operation ]
>>
>>
>>
>> Set mode menu for speedy setting
>>
>> Analog and digital meter indicates relative output power, SWR, ALC level 
>> and compression level
>>
>> Memory pad stores up to 5 or 10 operating frequencies and modes
>>
>> Quick split function
>>
>> RF gain and squelch control
>>
>> ±9.999kHz Adjustable RIT and ΔTX • 1Hz step tuning and display
>>
>> 101 memory channels with 10-character channel name
>>
>> Optional Voice synthesizer announces the operating frequency, mode and 
>> signal strength in English
>>
>> Program, memory, select memory, Δf scans
>>
>> Auto tuning step function Dial lock
>>
>> Band edge beep (can be disabled)
>>
>> AH-4 control circuit
>>
>> Automatic tuning speed
>>
>> CI-V interface with optional CT-17 for PC remote control
>>
>>
>> -----Original Message-----
>> From: uk-contest-bounces at contesting.com 
>> [mailto:uk-contest-bounces at contesting.com] On Behalf Of Clive Whelan
>> Sent: 01 April 2009 13:19
>> To: UK Contest Reflector
>> Subject: [UK-CONTEST] OT-Dxpedition
>>
>>
>> Please excuse the bandwidth to publicise this expedition.
>>
>> A group of GWs will activate the Llamedos Islands off the coast of
>> Pembrokeshire for one day only ( today). The islands consist of two
>> rocky outcrops exposed only for a period of ten days following the
>> Spring equinox, and have been  named Nalyd and Samoht after famous
>> Welsh authors of the past. Unlike Ynys Môn the islands are sufficiently
>> distant from the coast of Pembrokeshire to qualify for IOTA status and
>> application has been made to the RSGB for their accreditation
>>
>> The islands are known nesting and breeding grounds for Ospreys and Blue
>> Seals, so some disruption may be inevitable.
>>
>> QSLs may go via the bureau or direct to GW9BF QTHR.
>>
>> A loaf of lava bread is offered to the first UK station to work the
>> expedition on all 17 bands ( 160m to 10Ghz)
>>
>>
>> 73
>>
>>
>> Clive
>> GW3NJW
>> _______________________________________________
>> UK-Contest mailing list
>> UK-Contest at contesting.com 
>> http://lists.contesting.com/mailman/listinfo/uk-contest
>>
>>
>> -- 
>> No virus found in this incoming message.
>> Checked by AVG.
>> Version: 7.5.557 / Virus Database: 270.11.35/2034 - Release Date: 
>> 01/04/2009 06:06
>>
>> No virus found in this incoming message.
>> Checked by AVG - www.avg.com
>> Version: 8.5.285 / Virus Database: 270.11.35/2034 - Release Date: 04/02/09 
>> 06:09:00
>>
>>
>> _______________________________________________
>> UK-Contest mailing list
>> UK-Contest at contesting.com
>> http://lists.contesting.com/mailman/listinfo/uk-contest
>>
>>     
>
> _______________________________________________
> UK-Contest mailing list
> UK-Contest at contesting.com
> http://lists.contesting.com/mailman/listinfo/uk-contest
>

More information about the UK-Contest mailing list