ts 1000
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Manufacturers : SWR Meters- DJ9PK SWR Meters
- This device was designed as an SWR and power meter for Radio Amateurs. In addition to SWR, it measures forward and backwards power, therefore can also be used as a wattmeter. With a large measuring range from 1 to 1000 watts, it is suitable for use from QRP to QRO
[ Hits: 200 | Votes: 0 | Rating: 0 ]
- Recognition of CW signs at different listening levels and frequencies
- The recognition of telegraphy masked by noise at 40 and 80 signs/min telegraphy speed was studied in 10 normal-hearing subjects at different sound pressure levels (25-85 dB SPL in steps of 5 dB) as well as at different test frequencies (2000, 1000, 800, 630, 500 and 250 Hz). The ability to recognize the signs varied with varying SPL. Recognition for most of the subjects was best at an SPL close to 70 dB.
All subjects improved their recognition as the frequency was lowered to 500 Hz, some even at 250 Hz. These facts should be taken into consideration when training telegraphy operators as well as in the construction of radio receivers to permit listening at low frequencies. Furthermore, the critical ratio was calculated at the different test frequencies.
[ Hits: 81 | Votes: 1 | Rating: 7 ]
- Mod for Acom 1000 amplifier
- The problem originates by improper TXOUT-to-RF timing (RF transmission exists still after a TX-EN prohibition), combined by too long decay of their CW pulses.
[ Hits: 509 | Votes: 0 | Rating: 0 ]
- FT 1000MP MK V and Keyclicks
- YaesuFT1000MK V stands out with improved close-spaced SSB transmit performance, reversing a trend seen in other modern radios. Featuring a class-A mode, it offers clean HV finals when kept out of ALC. However, two significant flaws persist: the noise blanker causes receiver IM distortion, and the transmitter lacks wave-shaping on CW, resulting in pronounced keyclicks. Preliminary tests reveal strong keyclicks +1kHz and -1kHz, prompting a combined modification to address both issues.
[ Hits: 27 | Votes: 0 | Rating: 0 ]
- Yaesu MD-100
- Official Yaesu UK page dedicated to the popular Yaesu MD-100 A8X Base Station Desktop Dynamic Microphone especially designed for the FT-1000MP and FT-900 FT-747, FT-757GX, FT-840, FT-890, FT-990, and FT-1000
[ Hits: 407 | Votes: 2 | Rating: 3.5 ]
- Allchips - Electronic Components Online Service Platform
- Allchips is a professional electronic components online platform, supported by over 1000 original manufacturers & authorized agents, there are more than 10,000,000 parts on the platform, all of them are original and new guarantee.
[ Hits: 169 | Votes: 0 | Rating: 0 ]
- Fox Box - Transmitter controller
- This FOX-BOX is based on a single CMOS 555 timer and uses an ISD1000 chip to store the transmit ID.
[ Hits: 271 | Votes: 0 | Rating: 0 ]
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