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write your own review of the International Radio (Inrad) IF Filters.
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N9OO
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Rating: 4/5
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Nov 4, 2009 13:34
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Collins S-Line AM Filter
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Time owned: 0 to 3 months
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My impression of the 707S AM Filter for the Collins 75S-3B/C Receiver.
The filter works very well and even has a clean flat passband.
Complaint:
The PCB used to mount the filter is to wide! For those receivers that have the Mu-Metal filter covers installed it is impossible to place the cover back with the filter installed. This required me to trim off a little bit of the side of the PCB and also round off the corners. After doing that I was barely able to get the cover on. If INRAD would have made a PCB exclusively for the Collins 75S3B/C series that had a PCB no wider than the mounted Collins filter it would have been an easy install.
So I can only rate this a "4". Performance wise it's a "5", but installation issues brings it down one notch.
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PA3HGT
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Rating: 5/5
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Oct 8, 2009 09:48
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Great quality added !
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Time owned: more than 12 months
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I have with 4 transceivers good experience with these kind of filters.
I installed for the first time SSB Inrad-IF filters in a FT1000D and the audio-quality was significant improved.The 2,1 Kc Inrad-filters working better then original 2,4 Kc IF-filters.
The Icom rigs IC781 & IC775DSP had also their SSB-upgrades to Inrad,complete with roofingfilter like the FT1000D and i enjoyed the improvement much..
The 2nd FT1000D (year Y2K) have since a week the IF-filters installed for SSB and CW and sounds great again and is now 100% Inrad (sub-rx included)
Costumerservice/aftersales is very good,one IF-filter looked a little damaged and Trey sended a new one.That's great service.
If you have simple or difficult qeustions..e-mail response from Trey is fast and good.
Inrads are not cheap but you get a lot of joy back.
Highly recommended.
73,Hans,PA3HGT
www.pa3hgt.nl
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G8UBJ
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Rating: 5/5
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Mar 16, 2009 02:43
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Great product - good service
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Time owned: 0 to 3 months
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With the new breed of DSP radios I didn't think I would have to buy another filter but I recently bought an FT-857D for portable RTTY work and I'm planning a trip with it to VK so needed a good 300hz filter. Its was cheaper to buy this from the US than the stock filter from UK suppliers! Delivery was very fast and it was very well packaged. Fitting was very simple (Far easier than the old days where you have to solder them and move jumper wires). Performance is excellent and theres very little insertion loss. If I ever sell the FT-857D I will move the filter to the 2nd receiver in my FT-2000
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AB7E
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Rating: 5/5
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Mar 9, 2009 11:13
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Terrific service
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Time owned: 0 to 3 months
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I recently bought an Elecraft K3 (with subreceiver), and since I operate mostly CW I configured it with the 2.8 KHz 8-pole filters for SSB and the 250 Hz 8-pole filters for CW, all actually made by Inrad. I decided at the last moment to operate the ARRL DX SSB contest, though, and ordered a pair of Inrad's special 1.5 KHz filters for the K3. They arrived in two days (!!!) with no special request from me to expedite the shipping.
All of the filters work great, of course.
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VE6MRX
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Rating: 5/5
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Mar 6, 2009 09:06
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Great Service
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Time owned: 0 to 3 months
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I had orderd a new SSB filter for my FT-1000MP MKV and after install there were problems. After troubleshooting, the new filter looked to be the problem. An email and an explanation to Trey at INRAD brought a quick response and a new filter was on the way.The replacement fixed the problem. Thanks Trey! quality product with service to match.
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KX2V
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Rating: 5/5
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Jan 5, 2009 13:44
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FT1000MKV 2.8k Mod
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Time owned: 0 to 3 months
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Installed the 2.8Khz filters in my FT1000MKV.
Instructions clear & simple.
Improved Transmit & Receive.
Good sounding radio now sounds Great.
Worthy Modification..
I am going to do the Roofing filter next!!..
KX2V
JT
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W7MJM
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Rating: 5/5
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Jan 5, 2008 12:06
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250 Hz CW Filter in IC-703
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Time owned: 0 to 3 months
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I just installed INRAD's 250 Hz CW Filter in my IC-703. It's awesome, cutting the QRM and noise tremendously. I recommend it without reservation
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AH6RR
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Rating: 5/5
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Dec 22, 2007 18:07
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Spend the Money It's Worth it!!!
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Time owned: 6 to 12 months
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I have had the Inrad 8.83 khZ filter in my Kenwood TS-850S for about 9 months now. I love it. I ordered the 2.1 455 khZ filter last Friday it came this Friday (12/21) I installed it as soon as I got home WOW what a better combo than before. I can get 3 khZ from a BC station with out a scratch or squeak from it and can copy a s2 signal. The best I have ever had with this radio. You will not be dissapointed with these filters no matter what transciver you own.
73 and Great DX
Roland AH6RR
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VK3ZGP
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Rating: 5/5
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Sep 11, 2007 23:26
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SSB Filters For Yaesu FT-897
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Time owned: 0 to 3 months
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This is my first impressions as I've only had these INRAD filters for two days.
QRM is a significant problem at my QTH due to electric fences used in the vicinity for livestock, plus four High Voltage transmission lines that cross the property, plus limited options for antennas. The house is adjacent to a 66KV, a 220KV plus two 500KV transmission lines (see QTH in Google Maps Satellite Images).
INRAD currently offer three SSB filters (2kHz, 2.3kHz, 2.6kHz) for the FT-897 but the set can only accommodate two optional filters. On poor signals the Yaesu 2.3kHz (YF-122S) filter was nearly indistinguishable from Yaesu's excellent inbuilt Ceramic filter, therefore I selected the 2.0kHz (720-F) and 2.6kHz (706-F) INRAD filters.
As expected (with default DSP settings) the narrow filter digs weak signals out of the noise with the loss of fidelity, while the wide filter improves fidelity of some signals at a cost from the rise in noise.
The FT-897 allows you to rapidly swap receive fiters using the front panel keys (menu MFn) and uses links hardwired on the optional filter boards to display the bandwidth on the FT-897 front panel. Yaesu appears to have limited the display programming to suit their 300Hz, 500Hz and 2.3kHz Yaesu filter boards therefore both these INRAD SSB options appear on the FT-897 display as 2.3kHz filters. As they are selected using different front panel keys and you can hear significant audible differences between the INRAD filters I don't confuse selection.
In Menu Mode No 86 [TX IF Filter] there is the choice of Yaesu's inbuilt ceramic filter or either optional filter. This is independent from the receive filter selection. Again Yaesu displays the programmed 2.3kHz labels for INRAD filters, and not the actual bandwidth, nor the filter slot number. In this menu option the front panel keys are not used and Yaesu uses a small rotation of the main Dial to select different filters. This is not an issue when there are distinct labels (eg, a CW with a SSB filter). But with a pair of INRAD SSB filters there is the real possibility of confusion. As it can be difficult to determine which INRAD filter is being selected I place the 2.6kHz filter in slot 2, spin the main dial to skip slot 1 and select the 2.6kHz filter for transmit. It should be possible to select the narrow slot 1 filter if you stop main dial movement at the instant the display changes fron CFIL to the 2.3kHz label. At this stage I have not experimented with this option on-air.
The FT-897 TX metering displays the modulation percentage before the TX filter so changing filter selection does not change modulation meter reading but filter changes may be reflected in the TX power metering (worst case is SSB TX through a 300Hz CW filter, modulation meter reading still peaks to 100% and nobody hears you).
In summary, the 2.0kHz INRAD filter is now my default choice for receive but some operators could object to the loss of fidelity and the audible differences from the Yaesu 2.3kHz filter. If INRAD had sold a 1.8kHz SSB filter I would have been in the market. After using the 2.3kHz (YF-122S) Yaesu filter I would not recommend either the Yaesu or equivalent INRAD filter until some significant advantage over the inbuilt Yaesu ceramic filter has been proven. The 2.6kHz INRAD filter rounds out the FT-897 filter options for voice but I don't have the on-air reports to confirm a significant improvement. I'm satisfied with the performance of the filters while the display limitations are not significant to me, outside the control of INRAD, and inherent in the FT-897 design.
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