SONY AN-1 WIDE RANGE ACTIVE ANTENNA LW/MW/SW

This morning I put up a Sony AN-1 Wide Range Active Antenna on my roof for shortwave listening. Saturdays are great for antenna work since I have a 5 day work week. The antenna is a wide range active antenna with a frequency coverage of 0.15 ~ 30MHz and has a controller box in the shack side which powers a preamplifier for the antenna, there...

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Portable Cans: Sound MAGIC P20.

The Sound MAGIC P20 portable headphones are the latest entry from Sound MAGIC, but these are different from their normal products. They are not ear buds but collapsible portable cans that fit over your ear and are the first of their kind from Sound MAGIC. SPECIFICATIONSDriver: dynamic (30mm neodymium magnet)Frequency range: 15~22000 HzImpedance...

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Digital Technology Professional 3.5" Color LCD Monitor and Digital Satellite Finder

Detailed Product Description3.5 inch TFT LCD Satellite Finder - Model: CY70350The Digital Technology 3.5" Color LCD Monitor and Digital Satellite Finder is a professional grade piece of equipment. The installation of satellite TV receiver systems by professionals requires a tailored and dedicated apparatus, it is based on the actual installation...

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1928 Transmitter Tuning

Ross Hull's QST article documents a lot of experimentation done to understand the behavior of self-excited oscillators. Whether Hartley, Colpitts, TPTG or TNT Hull concluded that all of them behave about the same and the same tuning guidelines apply to all of them. In summary, any self-excited oscillator should be run at only about half power in order to produce at acceptable signal.After the transmitter is on frequency and running...

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1928 Transmitter Signal Quality

Ross Hull's August 1928 QST article, "Overhauling the Transmitter for 1929", is a great article for anyone interested in putting a late 20s/early 30s self excited oscillator on the air. This includes the Hartley, Colpitts, TPTG and TNT transmitters used in the AWA Bruce Kelly 1929 CW Party. In the words of QST, this "is, we feel, one of the most important articles ever published for the radio amateur. Let every amateur study it...

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Some Favs.

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1928 Hartley Coils

Pictured are my 80 and 40 meter tank coils. Ross Hull made a strong point in his QST article that these coils need to be able to handle a lot of current (5 amps of RF for this design), be mechanically stable and tune with as much capacitance as possible.These coils were wound out of 1/4" OD copper tubing. A piece of 2 3/8" OD pipe was used...

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Falling For You by Colbie Caillat.

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External Speaker for HF-150: Altec Lansing BXR1220.

Up till now I have been unable to find the matching SP-150 speaker unit for the Lowe HF-150, so I added the passive radiator of the Altec Lansing BXR1220 as an external speaker to the receiver. I choose it because of it's reasonable response for speech as well as fairly decent reproduction for music. Frequency Response: 180Hz to 20KHz Maximum...

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Fun Magazine Covers

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Lowe 150 System.

The following photo is an update of my Lowe 150 system which shows the HF-150, PR-150 and remote control system all housed in a small rack for the whole syst...

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2SC1946 28 Watts FM-broadcast (87,5-108MHz) rf-amplifier

2SC1946 28 Watts FM-broadcast (87,5-108MHz) rf-amplifier All component values are drawn on the .comp and .silklayer bitmaps, with the following exception(s); 1.- all four (4) coils (in the lowpass filter section) are: 3.5 turns, 8 mm DIA., 1.2 mm CuL closewound i.e. no wirespacing. Notes CuL = magnetwire, enameled copper wire, insulated...

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FM Circuit Transmitter boster 2SC1971 & 2SC1946A RF-amplifier

2SC1971 & 2SC1946A RF-amplifier Coil data: L3, L7      = 5 Turns, DIA. 6 mm, Wire 1 mm CuL (spaced) on one end of the coil (to the               power supply line) place a ferroxcube bead of approx. 3 mm diameter. L2, L6     ...

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TTI TSC3000R Wide Band Handheld Receiver.

A relatively new product is the Korean made TTI Wide band handheld receiver model TSC3000R:Click on the photos of the catalog below to enlarge the specifications, an interesting piece of equipment.Impressions:The radio is a nice palm size package and well built, it is RoHS compliant. It comes packed with a nice desktop charger stand (instead...

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