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| Reviews Summary for Datong Automatic R.F. Speech Processor |
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Reviews: 2
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Average rating: 4.5/5
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MSRP: $(missing—add MSRP)
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Description: An English, high-quality, mic-level speech processor. This "RF" speech processor upconverts microphone audio to around 455 KHz for proper clipping and filtering, and then downcoverts the RF back to audio for input to a transmitter or transceiver. The highly effective RF processor offers mic level input and output adjustments and indicators, such as low and high Z mic input matching selection, mic input signal level indications of "LO" and "OK", and a built-in tone generator for proper mic-level audio output adjustment. It also features features fixed clipping levels of OFF, 0, 6, 12, 18, 24 and 30 dB.
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write your own review of the Datong Automatic R.F. Speech Processor.
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GI0ZGB
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Rating: 5/5
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Nov 13, 2004 04:10
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Quality Processor
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Time owned: more than 12 months
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I owned two of these units way back in the eighties, sold the first then regretted parting with it. I still have the second for use on rigs that don't have, or have poor speech processing capabilities. I had a problem with RF feedback at one time, caused by a power supply ground loop. So I used a length of mini coax running from the PSU to the jack plug, but didn't connect the shield at the plug end, and this, breaking the loop, cured the problem completly. I think settings 6 & 12 would have been enough for local chat/DX & DX+QRM respectively, I can't recall using any other. It works well with a variety of mics, dynamic being best, keeping background noise to a minimum, my modified MC-90 (HQ Amplified) was brilliant. The quality of construction typical Datong - outstanding! Like my FL3 a unit worth keeping - highly recommended.
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NL7W
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Rating: 4/5
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Oct 4, 2004 21:16
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Super Effective Speech Processor
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Time owned: more than 12 months
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Like other Datong ham radio products, it exceeded my initial expectations. I have noticed the unit does require approximately 0.5 to 1 second of voice to properly level out the processing and/or gain level. Once that is established, the clipping really makes a difference. Personally, I have found the 6 dB level quite useful for most all work on HF SSB. The 12 dB level could be used for DX'ing and pileups, but it verges on being just too harsh as I listen to my rig's great monitor circuit. Higher levels are effective, but unpleasant.
IMHO, this product outperforms today’s audio and DSP compressors. It is (was) a quality English product. Overall, it completes well against an American made Vomax split band RF processor from the same period.
73.
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