G4ZFQ Radio Home

This page is a mess, but gives an idea of what you may see on other pages, look below for contents of my pages. OR look at the Menu..

G4ZFQ's Pages Softrock, SDR, Greyline (Grayline), other mainly Radio Oriented. A warning about a download? Virus Checker If any links are dead look here:- Get older versions of files/web pages.


Soundcard SDR Software

SDR Pages. Settings. Troubleshooting

Softrock Pages

Other Pages Including Essential Softrock Sites.


Installation and usage. http://sites.google.com/site/g4zfqradio/installing-and-using-hdsdr

Setting IQ balance https://sites.google.com/site/g4zfqradio/hdsdr-iq-balance

Fundamental settings for digimodes beginners, receive only. https://sites.google.com/site/g4zfqradio/hdsd r_receive_digimodes

Use with digimodes RDS Spy, use the techniques, a link explains. https://sites.google.com/site/g4zfqradio/hdsdr-cwskimmer-and-Other-Digimodes

This page gives many details about HDSDR and digimodes. With examples of CAT and DDE (Orbitron or SatPC32 controlling HDSDR for Doppler compensation). Dream DRM reception. https://sites.google.com/site/g4zfqradio/hdsdr_digi-modes

My preferred way for a HF panadaptor. Ideally take the Ensemble antenna connection from the transceiver. Using an Ensemble with a conventional transceiver as a panadaptor.

Using with a conventional receiver or transceiver as an IF panadaptor. Ham Radio deluxe controlling HDSDR with DDE . http://sites.google.com/site/g4zfqradio/hdsdr-if-pano

Using HDSDR with a RTL dongleAnd using the dongle as an IF panadaptor with a conventional rig. https://sites.google.com/site/g4zfqradio/hdsdr-use-with-rtl-dongle

How to set HDSDR for measuring signal levels, can be reasonably accurate if you have a standard. Using HDSDR for signal measurements, the S meter and Spectral Display.

Autocorrelation (and Cepstrum), new features November 2013. If you want to use this feature you probably know more about it than I! https://sites.google.com/site/g4zfqradio/hdsdr-autocorrelation

Virtual Serial Port for CAT https://sites.google.com/site/g4zfqradio/hdsdr_digi-modes#HDSDR%20accepts

Streaming Audio Between HDSDR and Other Programs https://sites.google.com/site/g4zfqradio/hdsdr_digi-modes#Virtual%20Audio%20Cable%20(VAC)

RX and TX Image adjustment for HDSDR This page should help for other software.


Alberto's Winrad help with illustrations updated to HDSDR. https://sites.google.com/site/g4zfqradio/winrad To be completed one day..

Using HDSDR with Wine on Linux https://sites.google.com/site/g4zfqradio/using-hdsdr-with-wine?pli=1

Soundcard SDR Software

All that I know. http://sites.google.com/site/g4zfqradio/soundcard_sdr_software


SDR Sharp # Notes for it's use.


Sodira Embedded DRM, some notes. The demo versions work but do not save settings. Rocky http://sites.google.com/site/g4zfqradio/sdronasus

Setup and some operation. But most is on Rocky's web site. http://sites.google.com/site/g4zfqradio/setuprocky

Editing Rocky.ini showing how to setup Rocky for personalised frequencies.


SDR Pages. Settings. Troubleshooting

Some SDRs are similar to the Softrock, also see that section.

SDR on Acer Netbook Initial driver installation on a Windows 7 Acer netbook. Notes about using it with SDR. A few notes about Sodira which includes a DRM decoder. http://sites.google.com/site/g4zfqradio/sdronasus

Basic details for a beginner with an assembled SDR. Please note a soundcard SDR is not "Plug and Play" Understand you need to check transmit with a receiver first. http://sites.google.com/site/g4zfqradio/configuring-a-softrock-sdr

Initial setup Showing SDR# setup and operation Rocky. Soundcard settings, testing. A few laptops known to have stereo inputs. http://sites.google.com/site/g4zfqradio/connecting-soundcard-sdr-to-computer

More soundcard settings Showing Rocky, ground loops. http://sites.google.com/site/g4zfqradio/sdr-with-soundcard-basic-faults

Ground Loops Explanation of "signals" seen at the centre of the SDR display. http://sites.google.com/site/g4zfqradio/soundcard_sdr_ground_-earth-_loops?pli=1

Ground loops and audio settings with HDSDR used for illustration. http://sites.google.com/site/g4zfqradio/more-on-ground-loops-and-audio-settings

Using the FCD with WSPR-IQ, and with CWSkimmer no intermediate SDR program. https://sites.google.com/site/g4zfqradio/using_the_fcd

Softrock Pages

These pages are basically a summary of subjects raised in the Yahoo - now IO group.

Softrock USB Driver and Controller Installation, faults. http://sites.google.com/site/g4zfqradio/attiny_usb

CFGSR Some things clarified. Explanation of usage and error messages displayed. http://sites.google.com/site/g4zfqradio/extio-or-cfgsr-some-notes

Calibrating the Si570 http://sites.google.com/site/g4zfqradio/calibrating-the-softrock-si570-usb-controller

Modifications to the Wiring of Ensemble Isolation Transformers. And notes to rectify low 20m output from some 40/30/20m Ensembles. Also Ensemble RX2 poor sensitivity on 10m.

January 2014:- All boards supplied from this date are corrected. No modification required.

July 2012 all Ensembles have a fault in the PCB layout. Page checked by Tony KB9YIG, the Softrock kit supplier.


Matching BS170 devices in the RXRX. http://sites.google.com/site/g4zfqradio/matching-bs170-for-softrock

TX signal levels in a Softrock RXTX. Making diode probes. Checking the 1dB compression point.


Softrock Si570 Internal power, for the Si570. TXRX Leds. etc. A way of making an IF tap from a transceiver for a panadaptor. Grounding the KM5H case, other mods. http://sites.google.com/site/g4zfqradio/ensemble_mods

Adding the LPF for a Softrock Ensemble RXTX. The additional LPF as required by many RXTX versions


Add USB PTT control for older Softrocks. Also shows some of the crazy ways I've done that. http://sites.google.com/site/g4zfqradio/srlitemod

VHF Ensemble. Isolating the antenna socket. Can overcome ground loop problems. http://sites.google.com/site/g4zfqradio/vhf_ensemble

VAC and Virtual COM ports with PSDR. http://sites.google.com/site/g4zfqradio/softrock-wspr-psdr-and-vac An alternative to VAC One cable free. http://vb-audio.pagesperso-orange.fr/Cable/index.htm

Program the ATTiny USB device http://sites.google.com/site/g4zfqradio/avrhvprogrammer

Si570 and Softrock Information Use "Ctrl - F" to search this big page for a keyword Softrock construction, Soundcards, Computers, Si570 information and control methods, just about everything associated with Softrocks here... I intend to check links and update sometime.....

A big page, not updated much but an archive of information.

Other Pages

Essential Softrock Sites

Purchase the Kits, or Assembled Boards. http://fivedash.com/

Robby's site for construction of current Softrocks http://www.wb5rvz.org/

Older Softrocks A big site. Started as step-by-step construction site. Now has pages for everything, descriptions of current and obsolete Softrocks, setting up, software, fault finding. http://www.wb5rvz.com/sdr/

Old pages superceded http://www.wb5rvz.com/index.html

Some notes about Programming Hans Summers' "Ultimate" multimode QRP transmitters. And some older GPS units that work with them.

The NEO-7 module. 0.25Hz -10MHz configurable numeric oscillator. Output frequency GPS-derived but greatly varying pulse width.

Tests on various soundcards EMU Tracker Pre this device is very similar to the EMU 0202 Sample rate 192KHz. USB2.

Xonar D2X Sample rate 192KHz PCIe I found this to be incompatible with other cards, even the on-board had to be disabled. All the others tested worked together with no conflicts. M-Audio Delta 44 PCI Two stereo pairs input and output. 96KHz. Creative SB24 Live! PCI Reasonable performance from this old SB0410 PCI card. ESI Maya44 PCIe This is a "poor man's Delta 44" It has 4 ins and outs but not quite as good performance. Realtek HD on-board audio Creative SB24 Live! USB RX only

Isle of Wight Locator Maps. Two maps showing WAB and Maidenhead squares on the Isle of Wight. https://sites.google.com/site/alan4alan/maidenheadlarge

Greyline (Grayline) Pages A few pages showing "research" using Softrocks looking for dusk/dawn enhancements on the lower HF frequencies.

Summary of checks:- https://sites.google.com/site/alan4alan/greylinerecordingstoinvestigatethispropa

Details of my Charts and Current recordings

https://sites.google.com/site/g4zfqradio/greyline_charts The format of my charts. Includes signal-to-noise-wspr-users-note and what-is-a-peak?







UK 5MHz Beacons, monitored with Softrock. Details available.

Radio signals don't go straight from TX to RX. http://sites.google.com/site/g4zfqradio/ok0eu-beacon-screenshot-3-4-august-2010

Other Google.

My beginnings with satellite TV and radio. https://sites.google.com/site/alan4alan/home

LC Test Meter https://sites.google.com/site/alan4alan/lc100a_term_on_right

USB to LPT genuine parallel port

NOTE! These pages may be updated at any time when corrections or new information are added.

alan4alan googlemail com August 2020