Thursday 30 July 2015

AnyTone AT-588 70 MHz FM Transceiver.

Any Tone AT-588.

I have just ordered one of these, I already have the Any Tone AT-5189 which is working great, I have one of the very rare 45W versions, but I would like to upgrade to the New Any Tone AT-588, the new one runs 50W but that is not the reason for wanting to buy one, the new model has a signal meter which I would love to have on my main 4m radio...



So I will be putting my Any Tone AT-5189 up for sale as soon as the new one arrives.....
Any Tone AT-5189 For Sale Soon...

Here are the specs of the Any Tone AT-588:
Frequency: HF 66~88MHz

Function:
Output Power:50W(VHF),45W(UHF)/25W(HF)/10W
100 programmable memorized channels and Call channel, the channels can be  marked with letters and digits
CTCSS/DCS/5-Tone decodes and encodes

Four different single-tone pulse frequencies
CTCSS/DCS scan
Compander to reduce noise
Theft alarm
ANI function(DTMF/ANI,5Tone/ANI) PTT ID.
QHM-03 multifunctional microphone with DTMF
Scramble function(option)
Accessories:
   Microphone(with DTMF keypad)
   Mobile installing bracket 
   DC power cable with fuse holder
   Hardware kits for bracket

AT-588 SPECIFICATION
General
Frequency Range
HF: 66-88MHz 
Number of Channels
200 channels
Channel Spacing
25K (Wide Band)  20K(Middle Band)  12.5K (Narrow band)
Phase-locked Step
5KHz,6.25KHz,8.33KHz,10KHz,12.5KHz,15KHz,  20KHz,25KHz,30KHz,50KHz
Operating Voltage
13.8V  DC ±15%
Squelch
Carrier/CTCSS/DCS/5Tone/2Tone/DTMF
Frequency Stability
Wide band
Narrow band

Power Output 50W/25W/10W

Wednesday 29 July 2015

Noble NR-4SC 70Mhz USB/CW Transciever


The NR-4SC is a simple to use 15 Watt (nominal) 4
Meter SSB/ CW transceiver. The radio operates USB
and CW. The NR-4SC uses a single conversion design
with an IF frequency of 10.7 MHz. Front end band pass
filters limit out of band signals into the RF Preamp
stage. A double balanced diode ring mixer provides
good strong signal handling capability. There are two 8
pole crystal filters following the mixer which are
designed for 3.0 kHz and 500 Hz -6dB bandwidths. The
3 kHz filter allows for good SSB voice fidelity while the
500 Hz filter provides good adjacent channel rejection
on CW. Either filter can be selected in both modes. Two
IF amplifier stages and fast attack AGC provide good
receiver sensitivity while levelling the audio output on
strong signals. AGC action starts at approximately a
-120 dBm input signal level. The local oscillator is
derived from a DDS/PLL circuit providing a high degree
of stability and low noise. A high stability 107.374 MHz
reference oscillator is used for all local oscillator
generation. The high frequency provides low DDS
spurious output. The transceiver offers a 10.7MHz IF out
on the back panel for connection to an SDR so it may be
used with a PC for a Spectral Display. Other features of
the NR-4SC include RIT (Receiver Incremental Tuning)
and SPLIT mode functions as well as a built in Iambic
Keyer for CW. The AGC rate has a FAST and SLOW
speed to suit operator preference.


Specifications:
1) SSB/CW
2) 15 Watt output power
3) Built in Iambic keyer
4) Analogue S-meter, not a bar graph.
5) RIT
6) SPLIT
7) Variable Speed Tuning (VST)
8) Wide and Narrow Crystal filter
9) Fast and Slow selectable AGC
10) Output to key an external Amplifier
11) Can be switched for QSK and Non QSK compatible
Amplifiers
12) Simultaneous display of RX and TX frequencies
13) 13.8VDC at 4 Amps TX current
14) 650 mA RX current
15) Built in loudspeaker
16) Audio output .6 Watt
17) 10.7 MHz IF output
18) RX Sensitivity -130dbm MDS
19) IF rejection greater than 100db
20) Blocking dynamic range 107db
21) Third Order Dynamic Range = 96db (IP3 = +14dBm)
22) 2nd Order Dynamic Range 87db (IP2 = +44dBm)
23) TX spurious is better than - 55dBc which meets CE
ETSI EN301 783-1 standards
24) 10.625 in W (27 cm) x 11.25 in D (28.6 cm) x 5.375 in H
(13.7 cm) – This excludes the height of the feet and the
knobs and connectors on the 18 front and rear panels.
25) Weight - Approximately 11 lbs (5 Kg)




Saturday 18 July 2015

Good Luck Padraig Baines.


Preparations are well under way for the 70MHz Trophy contest tomorrow from 10:00-16:00UTC, Padraig will be active under the callsign M0BAA/P from JO01KJ, listen out for him in the contest.




Sporadic E on 4m.

David Gi4FUM Just worked Keith CT1JAD on 70.200 - 55 both ways. 
Dave was running 35w into a vertical dipole.
For further updates on how the 4m band is doing click on the following link:  
70Mhz Live Maps.


Wednesday 15 July 2015

Internal Transverter For 70Mhz for the Eelcraft K3.




The transverter HG 70-K (70 Mhz) has designed for internal use on Elecraft K3, using the
28 Mhz like IF ..
In reception mode, the amplifier has a low noise factor, <1 db and the IP3 >+29 dbm.
No need external power supply and no need tuned.
The installation of the transverter HG 70-K into the Elecraft K3 ,is very easy and fast.Only
you need solder 3 wires , connect 2 coaxial wires and install connector for 70 MHZ Antenna
Mhz.You need 30 minutes of work.The transverters is fully assembled and ajusted..
As option can be installed precision crystal heater with temperature 40.8 °C ±1.5 °C in 42
Mhz Oscilator.This is designed only for Elecraft K3.
REQUIREMENTS OF ELECRAFT K3:
K3 WITH INTERFACE TRANSVERTER KXV3A...The KXV3 is not valid.
NO INTERNAL TRANSVERTER INSTALED LIKE K144XV.
IF YOU HAVE INSTALLED THE K144XV TRANSVERTER YOU CAN NOT
INSTALL THE HG70-K TRANSVERTER.
ELECRAFT K3, KXV3, KXV3A and K144XV is a registered trademark of Elecraft ,Inc.
Transverter HG 70-K PRE-MANUAL


Specifications:
Installation : Internal (Inside ELECRAFT K3)
Full QSK
Measures : 73mmX73mmX30 mm
Supply Voltage: 12 VDC (Get of ELECRAFT K3 internaly)
Current Drain :
Received : 100 mA...130 With the precision crystal heater
Transmit: <3 A
Frequency Range:70,000-72,000 MHZ...Optimized 69,800 to 70,400 Mhz
TRANSMITTER
Power output (50 Ohm load) : >10W ….14W at 1.1:1 SWR
Operatinf modes : SBB,FM,CW,Digital,etc
IF range :28,000-30,000 Mhz
TX RF Mixer Mini Circuits ADEX-10H (+17dbm)
IF input powe range :1mW
Full QSK

RECEIVER:
Noise Figure : <1 dB
Conversion gain :Typical
RX RF Mixer Mini Circuits ADEX-10H(+17dbm)
3rd-Order Intercept :>+29 dbm
OPTIONAL : Precision Crystal Heater for 42 Mhz
REQUIREMENTS OF ELECRAFT K3:
K3 WITH INTERFACE TRANSVERTER KXV3A...The KXV3 is not valid.
NO INTERNAL TRANSVERTER INSTALED LIKE K144XV.
IF YOU HAVE INSTALLED THE K144XV TRANSVERTER YOU CAN NOT
INSTALL THE HG70-K TRANSVERTER.
ELECRAFT K3, KXV3, KXV3A and K144XV is a registered trademark of Elecraft ,Inc.
Transverter HG 70-K PRE-MANUAL
INSTALLATION OF TRANSVERTER INSIDE ELECRAF K3
The installation of transverter inside of Elecraft K3 is easy.Only need solder 3 wires for power
supply and control.
Transverter HG 70-K PRE-MANUAL
Connect 2 wires coaxial into IN/OUT of KXV3A
Transverter HG 70-K PRE-MANUAL
And make hole and install BNC Female Connector for 70 Mhz Antenna at the rear of K3
Transverter HG 70-K PRE-MANUAL
K3 SETUP FOR HG70-K TRANSVERTER
MENU :
XV1 ON …... YES
XV1 RF ….... 70
XV1 IF …..... 28
XV1 PWR..... L 1.00
XV1 OFS ….. 0.00
XV1 ADR...... Int. Trn0
When you select by band button and change for transverter you have 70 Mhz and the transverter is
power on.If you change of band for example at 50 Mhz the transverter is power off.
See video on youtube...... Here