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You can
write your own review of the DUNESTAR 400-HPF.
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VE2DC
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Rating: 5/5
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Jan 31, 2010 08:05
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Excellent
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Time owned: more than 12 months
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This is an update and corrections. AFAIK it is still in available. It has excellent rejection. It will solve your BCB issues if the problem is front-end overload. It can not solve problems caused by BCB harmonics generated (typically by diodes or connections acting as diodes) prior to the filter. I have encountered this with diodes used in wattmeters, loose antenna or coax hardware and even a very expensive HF power amp. These problems can only be solved at the source.
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VE4AMN
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Rating: 5/5
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Oct 30, 2008 16:07
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Cleans up 160 and 80
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Time owned: more than 12 months
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This does not eliminate all the BCB on the low bands, but it is a very worthwhile addition to the shack. The two low bands are much quieter. I attached it to the back of my Kenwood AT 200 tuner and it makes for an unobstrusive and effective package. Recommended and a decent price.
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WA1SEO
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Rating: 5/5
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Feb 15, 2008 06:25
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Works as expected,Great!
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Time owned: 0 to 3 months
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I live in relatively close proximity of several broadcast stations. My ICOM 706MK2G was virtually useless on 160 unless I used an external attenuator, but then the signals were too weak to copy. My Orion 2 had an issue also, although I could still operate with 12dB of attenutation.
I took the advice of a friend and ordered the Dunestar 400-HPF without even investigating it. When I received it, the first thing I did was look at the response on my network analyzer from 500KHz thru 1.8MHz...it looked like the perfect solution. I connected it to each radio with a bypass switch to make a before/after comparison. I can now use the preamp in each radio on 160! I'm very pleased with this product.
Mike, WA1SEO
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VE2DC
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Rating: 5/5
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May 9, 2003 23:20
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Does the Job
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Time owned: months
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Have had trouble for years with a couple of local broadcast stations. This cleaned up the intermod on 80/160 nicely. BTW, if I hook up a 12V bulb directly across my 160/80 antenna's feedline... it lights up to nearly full brilliance... and pulses with the modulation of the closer local broadcaster...
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K4SXT
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Rating: 5/5
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Jun 4, 2000 03:46
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Does the job
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Time owned: more than 12 months
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The Dunestar 400 HPF does what it is supposed to do - the cutoff is very sharp starting just below 1.8 mhz. Without the filter I would not have been able to operate on 160 meters from this QTH near a broadcast station in Guam. Many thanks to Dunestar - KH2/K4SXT
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Anonymous
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Rating: 3/5
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Oct 25, 1999 07:14
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The Dunestar 400 HPF cures IMD in the IC-756
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Time owned: unknown months
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I was having bad IMD on 160 meters in my ICOM 756 until I got a Dunestar 400-HPF (I have a 50KW broadcast station 1/2 mile from my house) -- with the filter in line the IMD is gone. My receive capability on 160 is greatly improved.
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