Catalog: MFJ 2006 Catalog | |
| What did you say? Can you hear but . . . just cant always understand what people are saying? As we get older, high frequency hearing loss reduces our ability to understand speech. Heres why . . . Research shows that nearly half the speech intelligibility is contained in 1000 to 4000 Hz range, but contains a miniscule 4% of total speech energy. On the other hand, the low frequencies, 125 to 500 Hz have most of the speech energy (55%) but contribute very little to intelligibility only 4%. To dramatically improve your ability to understand speech, you must: First, drastically increase the speech ... | |
| Listen to maritime users, diplomats and amateurs send and receive error free messages ... | |
| MFJ . . . The World Leader in Ham Radio Accessories 39 Plug this new MFJ-1275/M/T sound card interface between your rig and computer and enjoy operating all digital modes. Everything you need is included software, audio cables, RS-232 serial cable and AC power supply. Provides fully automatic operation with audio and push-to-talk control. Matches sound card audio, eliminates ground loops and provides mic override. Models available for all transceivers with 8-pin round, 8-pin modular (RJ-45) or 4-pin round microphone plugs. Operate PSK-31, packet, APRS, AMTOR, RTTY, SSTV, CW, high speed CW Meteor ... | |
| transformers are for building power supplies and amplifiers. 406-3800 is designed ... for linear power supplies, that is capable of delivering current ... | |
| 72 www.vectronics.com Vectronics high-performance electronic kits . . . fun to build and use! Full featured CW Keyer Kit is the best electronic keyer bargain in radio! Self-completing dot-dashes and dotdash memory forgive timing errors. Front panel volume/speed (3-65 wpm) controls. Weight adjusts 25-75%. Sidetone (300 -1000Hz) has LM386 audio amp for external speaker. Iambic A or B, fully auto or semi-auto bug mode. Sleep Mode battery saver. Use 9V battery. 1 3/4x4x 3 1/2 in. Simple skill level. Order VEC-201K, $24.95. Crystal radio set Kit lets you relive the experience of early radio pioneers. ... | |
| out of the way Wired for 120 VAC, supplies 50 VDC at 25 Amps to ALS-600 amplifier ... | |
| Watts because their lightweight power supplies cant use these tubes to their full ... | |
| using two 3-500s use such small power supplies they dont deliver much more power ... | |
