|
New to Ham Radio?
My Profile
Community
Articles
Forums
News
Reviews
Friends Remembered
Speak Out
Strays
Survey Question
Operating
Contesting
DX Cluster Spots
Propagation
Resources
Calendar
Classifieds
Ham Exams
Ham Links
List Archives
News Articles
Product Reviews
QSL Managers
Site Info
eHam Help (FAQ)
Support the site
The eHam Team
Advertising Info
Vision Statement
About eHam.net
|
| Reviews Summary for JPS NIR-10 |
|
You can
write your own review of the JPS NIR-10.
|
N3UUI
|
Rating: 0/5
|
Jun 13, 2005 02:10
|
Send this review to a friend
|
|
PIECE OF JUNK
|
Time owned: 0 to 3 months
|
This thing has a very poor Audio DSP Algorithym and Pops and Clips the audio. Reading all the complaints on it this is caused by the manufacturer not using an AGC or AVC in the circuitry to smooth things out.
It's a TOY not a piece of professional equipment.
->AC hum is introduced in the Audio by the Cheap AC ADAPTER. That along with the poor filtering of the Processed signal, you can hear the HOWL from the processing.
It's only a 40 MHZ processor, Hence the terrible Time Delay!
Want something better?
Shop around, these are worth about 10 Bucks with whats out there now since this was made.
|
|
N0VA
|
Rating: 4/5
|
Nov 13, 2004 14:56
|
Send this review to a friend
|
|
Nice but bypass could be better
|
Time owned: 0 to 3 months
|
I purchased a clean, used unit with the updated rev. 3.0 software installed on eBay for $46 + shipping and believe that was a good deal.
Much to their credit JPS Raytheon maintains a PDF copy of the the updated manual for this unit on-line. Even though the control panel looks simple compared to an MFJ 784 it really helps to have the updated manual at the ready while in the learning curve.
I work only CW so my rating applies only to A1A and not voice modes. I rated the JPS NIR-10 "Good" not "Great" but it is way ahead of the original kit-built DSP-1 that I tried out. The NIR Level (noise interference reduction) and Band Pass shift control functions are helpful with CW as is the Peak function.
The only aspect of the JPS unit I do not like is the remote bypass arrangement used to kill the 130msec delay when monitoring the outgoing CW signal. The unit can be manually bypassed by flipping the MODE switch all the way down to BYPASS. Or one can connect a keying signal line from the transceiver to an RCA connector on the back of the JPS unit. With my kit-built qrp rig the only way I could think to do this was to split the direct output from my memory keyer and run a patch cord to the INV. REMOTE BYPASS connector on the JPS. The resulting monitored cw signal was usable but of rather poor quality (popping). This method may work better on other transceivers.
That being said I find the JPS NIR-10 easy to use and effective and would buy it again.
|
|
KG6TAG
|
Rating: 5/5
|
Oct 10, 2004 23:05
|
Send this review to a friend
|
|
Especially good for CW
|
Time owned: 0 to 3 months
|
I recently purchased the NIR-10 (with latest firmware for "Peak" mode) for $95 - which is about $20 more than you can find this unit for on eBay. None-the-less, I am very pleased with this unit.
It works especially well on CW signals in "Peak" mode to separate background noise from the desired signal. I won't say that the resultant signal is stripped fully of all noise so that it is pure and clean, but its readability does go up significantly. For example, with a CW signal that is a few dB above the noise, this filter will "gate" the CW signal and a significant bit of the noise together -- that is, the resultant passed audio is not a pure sine wave CW tone, but it is definitely CW (tone + noise) that can be read easily.
When I combine this filter with my BW selectable SCAF filter, I have a great combination.
Generally the "Peak" function works great on its own, but in very poor conditions a combination of the NIR and Peak mode seems works even better - although requiring a little fiddling of the level control.
I haven't really used this filter in BandPass mode due to the SCAF filter, but it seems to have nice sharp skirts - unfortunately, when you use the Bandpass mode, both the Peak and NIR mode are not accessible, so I recommend you either go with the NIR-12 for its dual DSPs, or you go with an outboard Band Pass filter like I am using.
I have used this a little bit with SSB and it seems to do a nice job at noise reduction using NIR and/or Peak settings again. But, I am not a frequent voice operator so I haven't really exercised it a lot.
For $75 purchasing this is a no brainer. For $95 this is still a compelling choice and good value for your non-DSP rig (mine is an older Icom 751A without DSP).
|
|
VE3XDB
|
Rating: 4/5
|
Jun 12, 2003 12:27
|
Send this review to a friend
|
|
Very nice unit
|
Time owned: more than 12 months
|
I have been using an NIR-10 several times per week for the last 2-3 years. The unit is well made, and does a nice job of overall noise reduction on my Kenwood TS-440S/AT.
PRO's
- does an especially good job on CW, which is my primary mode. All functionality, from the general noise reduction, notch filter and bandwidth filters all work nicely on CW.
- does a credible job on SW broadcasts, although it seems too narrow for most voice modes (see con).
CON's
- don't lose the manual! Combination of switches is used to select desired filtering. Not really intuitive, although I am getting used to it.
- in all voice modes, audio seems clipped, and to my ears, generally more difficult to copy without the noise than with the noise. I don't use it for voice, and would not recommend the unit if your primary use would be for SSB or AM SW broadcasts.
- DSP howl sometimes hard to take when using the narrow filters.
All in all, this unit has served me well, and is performing as I would have expected it to perform.
|
|
RAOTA1365
|
Rating: 5/5
|
Jan 14, 2003 19:29
|
Send this review to a friend
|
|
A great unit
|
Time owned: 0 to 3 months
|
|
This is my latest toy,a great unit and easy to operate,kills the noise a treat in this a noisy location.
|
|
G0NVD
|
Rating: 5/5
|
Jan 4, 2003 14:04
|
Send this review to a friend
|
|
Mush Reducer
|
Time owned: more than 12 months
|
Had the unit 4 years now and it drastically reduces local powerline mush to a level that makes the station much easier to listen to.
When something works then leave it alone and this one is stopping just where it is. Much much better than the dsp in the Mk5 and 756Pro I find.
|
|
WA3QVU
|
Rating: 5/5
|
Nov 17, 2002 10:49
|
Send this review to a friend
|
|
Good Audio DSP
|
Time owned: 3 to 6 months
|
I purchased the NIR-10 used at an estate sale, in very good condition. I have the original receipt from the Ham Station; it sold new for $314.95.
I can only comment on Audio DSP, as I've never owned an IF DSP radio; but I'm told most people will not be able to hear the difference between Audio and IF DSP.
I whole heartedly recommend an Audio DSP for anyone who does not have good filtering on their receiver. The NIR-10 is just what the doctor ordered for older general coverage or Ham Band receivers without the the expensive ladder filters in the IF section.
The NIR-10 has a bypass switch which allows you to quickly change between modes; NIR (full DSP), Band Pass, and Bypass. You can instantly tell whether the NIR mode is useful; Or if the signal is better heard in the Band Pass mode. The unit has a three step BW switch which operates separately from the variable knob control. And it includes a built in amplifier that will power a very large speaker. (RCA jacks on the back) All powered from a 12v DC input (coax jack).
On the negative side; you must drive the NIR-10 with the correct audio level from the main radio. There's a PEAK LED that will flash on the high peaks of audio input, but you must adjust the volume control on the main radio first, then adjust the volume control on the NIR-10 for correct volume. Also, the purpose of Digital Signal Processing is to pick up the inherent peaks and dips of voice communication. That being said, the NIR mode does not work very well on music; You must switch to the Band Pass mode, select the Wide position from the BW switch, and adjust the knob for filtering.
|
|
W6LAR
|
Rating: 5/5
|
May 3, 2000 14:35
|
Send this review to a friend
|
|
Rescued my HW-101
|
Time owned: 0 to 3 months
|
|
Made a trade with a fellow who worked for JPS. He had this one stashed away and it was brand new in the box never opened. This was about a month ago, end of March 2000. Anyway, I had intended to use it with a recently acquired HW-101 to see how good I could make the 101 sound. For starters, the DSP functions very well and eliminates much of the noise as the 101 does not have a NB. But even better was the audio bandwidth function. Its as if you had a very good adjustable if in the 101. Now it performes nicely and brought the pleasure back to operating the HW-101 closer to todays standards. I give it a 5 because I think its great!
|
|
If you have any questions, problems, or suggestions about Reviews,
please email your Reviews Manager.
|
|
|
|
|
