Father Christmas was kind to Gary. He got a new Yaesu FT-7800 for Christmas. Gary set it up in the Scout Hall, joined a couple of nets and had fun.
Steve New audio filter and CW tuning aid
Steve gave a demonstration of a kit he has built from Elecraft. It worked very well and certanly
improved CW reception on his IC-703. The cost of the kit is about ⅓ the price of fitting a CW filter.
http://www.elecraft.com/
AF1 Active Filter with Audio Amplifier
The Elecraft AF1 is a versatile audio filter that can be used with any receiver or transceiver. It can improve intelligibility of CW, phone, or data signals, and is especially well suited to radios that have inadequate I.F. or audio filtering. The AF1 uses straightforward analog circuitry and no surface-mount components, so it’s an ideal project for first-time kit builders.
A rotary switch on the unit allows you to select a low-pass characteristic with adjustable upper frequency roll-off, or a narrow bandpass characteristic. The bandpass filter offers two levels of selectivity, and its center frequency may be tuned from about 350 Hz to about 950 Hz. The low-pass filter is active during bandpass operation, allowing you to further control the upper frequency response. The output amplifier drives low impedance phones or a small loudspeaker. Power can be supplied via either an on-board 9-V battery or an external supply. An LED indicates power on/off status.
Specifications
- Filters: Variable Cutoff Low pass filter (SSB/CW) plus two levels of narrow CW bandpass filtering with tunable center frequency.
- Built-in audio amplifier with volume control.
- Dimensions: 5-1/2” L x 2-7/8” W x 7/8” H (14 cm x 7.3 cm x 2.2 cm). Height not including feet or knobs
- Power: 9V battery or external 12 to 14 VDC
Manual
Warren & Denis repairing an Eddystone EC10 mk1
A lovely old radio worth getting working.
Frequency coverage - 550 kHz to 30 MHz (in five bands)
Intermediate Frequency - 465 kHz
Sensitivity - <5uV for 15dB s/n ratio
Image rejection - 50dB at 2.0 MHz, 20dB at 20 MHz
Mick TAK-TENNA
Mick showed us his new TAK-Tenna he has made.
http://www.tak-tenna.com/
Warren fixed the heating :-)
Plus a lot of tea and coffee drinking over some interesting radio chat.
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