[Boatanchors] HF Receiving Balun

[Byron Tatum]

Hello-
    I recall an article by Mr. Glenn Zook about using a TV-type receiving balun with older shortwave receivers (such as HQ-129X) that have around 300 ohms input impedance. The balun would noticably improve reception.
    I have just finished restoring and re-capping a HQ-129X. I am thinking of aligning it using signal generator fed through the balun. 
    I would like to build my own as I have a lot of torroid and balun cores for QRP use.
    Does anyone know of a good construction article showing how to build such a receiving balun?
                                                    Thanks, 
                                                            Byron WA5THJ