Just got back into town and noticed this thread. I am involved in the design of instruments for physics research. And one problem that we have encountered is the rapid change in computer technology m
This is not so much of an issue as it may be if you are using several receivers perhaps in space or polarization diversity or plan to use a transmitter or transceiver along with the RX340. In that ca
Has anyone compared the Argonaut V's Noise Blanker to older non-IF-DSP receivers? I am disappointed by the spec. Receive power supply current. I wish attempts were made to keep it low for battery ope
I wonder if Ten Tec could produce a RX320 with IF output only to send to sound card and not have the DSP stuff and audio for much less than the RX320. PC DSP IF is practical now up to 15 or 20 KHz. 7
Sound cards today will provide a dynamic range of over 120 db anyway. Looking at the schematic, there are 2 PIN diodes for gain control. One just after the Input lowpass filter and one on the output
I think they could make a relatively simple kit with the local oscillators, mixers, IF and filters (45MHz and 455KHz). Take out the extras like AGC ( use attenuators), and the HI-Z input. This would
I do not need an an Argonaut V. I was was interested in a very basic (primitive)low cost receiver that would take advantage of the existing processing capability that most people have. Something bett
" Your pupil's difficulty with oscillators, have you never tried them with the Franklin? I built one in the early '60's using a 12AT7 double triode minimum external components, using a high quality c
I don't think the FCC cares. Just look at the FRS/GMRS radios being sold in stores. You have to use a magnifying glass to see statement that an FCC licensed is required and they may not have anything
The amplifier with 4 807s was a Gonset 500-W. Grid driven amplifier with 750 volts on the plate and 375 volts on the screen and tuned grid. It had 275 watts PEP output. Not very much by today's stand
I am new to the group but very interested in tentec products. And will be there for the hamfest in October. I hope some one has a copy of a Triton IV (analog dial) schematic out there. If possible ma
Ringing is in the nature of narrow band pass filters. Ringing "length of decay" is more a function of bandwidth than that of skirts. If you have a 1 Hz bandwidth filter you can't detect pulses spaced
There is just too much emphasis on filter ripple, linear phase, and skirt slope of filters for audio especially voice and CW applications. People talking of these concerns have read articles, papers
Collins (Rockwell) was developing high speed adaptive modems 20 years ago. I think they understand filters better than you may think. But when it comes to the modulation techniques used in amateur ra
Sounds like you have a difficult task ahead of you. If you want to compare phases of the outputs of 2 receivers you must use the same oscillators. Unless there is a way to sync. the DDS references an