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Reviews For: PAR Paging Notch Filter VHFTN152-158

Category: Filters, RF: bandpass, duplexer, lowpass, highpass, RFI/EMI

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Review Summary For : PAR Paging Notch Filter VHFTN152-158
Reviews: 38MSRP: 96
Description:
A 3-section Notch Filter. One section each tuned to the 152 and 158 MHz
paging bands. The third section is tuned to whichever is causing the most
problem for additional rejection.
Product is in production
More Info: http://www.parelectronics.com
# last 180 days Avg. Rating last 180 days Total reviews Avg. overall rating
00384.8
K1CWB Rating: 2001-10-14
Filter didn't work worth anything Time Owned: 0 to 3 months.
What a pile, we put this intermod filter on our repeater that was getting VHF pager interference, and it didn't make ANY difference, it didn't stop any intermod from coming in. Money would have been better spent on something that actually worked.
KB9YUR Rating: 2001-04-04
Works GREAT! Time Owned: 0 to 3 months.
Here in the Chicago area, intermod problems can be a problem. This filter did the job
and I couldn't believe it's small size. I hooked it up to the back of my Icom
706MKIIG radio with no problems. Well worth the investment!
KB2VUQ Rating: 2001-02-28
Two Thumbs Up! Time Owned: more than 12 months.
Re:Two Cavity VHF Notch Filter from Par Electronics.

It saved the life of my Kenwood TMV-7A
dual-band radio.

Removed all signs of VHF receiver overload
from the radio.

I used a return loss bridge and an IFR-1200
(with spectrum analyzer) to measure the filter.

VSWR between radio and filter was about
1.2:1 on VHF and 1.35:1 on UHF.

Loss was minimal.
47 watts in on VHF (146.550) saw 45.4 watts out.
35 watts in on UHF (446.000) saw 33.8 watts out.

The filter was transparent to my dual-band radio.
Unlike "other" bulky band-pass only filters,
this small "notch" filter easily went between
the radio and antenna (much like an swr meter),
no diplexers, combiners or voltage were required.

The notch was steep, from 151.500 to 153.500Mhz.
Everything else was still transparent.
I'm still able to receive the National Weather
Service on 162.550 (without any degradation)

So far I've bought one directly from Par Electronics, One from a friend who sold his radio
and I'm going to buy another...with the next radio!

Thanks to Dale and "The Gang" at Par Electronics....My Two Kenwoods live happily
ever after!

By the way...They emboss the filter's label
with your callsign...Custom made for....
just like on Mack Trucks!

Best 73,
de
Dennis Volin
(KB2VUQ)
W6MKA Rating: 2001-02-09
It's Magic! Time Owned: more than 12 months.
I live on top of a mountain and drive past a transmitter site daily. My FT-8100 was hit with intermod and made the hamming part of my daily trip impossible. This filter cleans up all the squeaks and squawks I used to hear. I highly recommend one if you have similar problems. As far as the insertion SWR is concerned, I recommend that users review what SWR is all about and understand that a 1.7:1 SWR is not a bad thing. Hams spend way to much time and money trying to obtain that perfect match, when in fact it doesn't matter till you reach 2:1. What does matter is how you make the measurment and what you use to make them. Measuremnts at VHF/UHF are influenced by factors not critical at HF frequencies. Don't sweat the small stuff, enjoy the fact that the intermod is gone!
W7NEW Rating: 2000-11-25
Verry Good Filter Time Owned: 6 to 12 months.
I found this filter to be very useful at reducing intermod. It is inexspensive and works well. I have used it mobil on a dual band radio and that worked well too. If you have a dual band radio this is the filter for you as it is transparent to 70cm. The swr however for me does go up even under 50 watts. The reflected power rises to about a 1.7 to 1 at 50 watts. Thats not bad but I wish it was better. I have stoped using this filter on my Ic 746 because I cant seem to remember to turn down the power when coming back from HF. If this filter handled more power it would be a lot better.
KD5GKF Rating: 2000-08-14
great stuff Time Owned: 0 to 3 months.
The Par filter fixed my imtermod problem compleatly, just like magic. I use the 2m vhftn152-158 and the 70cm uhfdn450 in serie. I will get a pair of filters for my car. Try them if you have the same kind of problems I had. I live close to the Astrodome in Houston.
K9DDB Rating: 2000-05-08
Excellent Performer Time Owned: more than 12 months.
Living only 2-3 miles from downtown Chicago and virtually surrounded on all sides by rf generators, I rarely left my 2 meter base radio on just to monitor. It was constantly squawking, squealing and generally being a distraction. Saw the ad for the Par filter in QST but was put off by the fact it was only rated at 50 watts. I finally called Par and was informed that for a few extra dollars they would build one up that would handle the 100 watt output from my transmitter. In less than a week it had arrived and was promptly installed. WHAT A DIFFERENCE!!
In the 3+ years it has been in line I could count on one hand the times I have heard ANY unwanted signals. This is truly a fine product and if you are in an area with high rf from paging transmitters, I can heartily recommend this unit.
FORMER_WA_4RX_ROB Rating: 1999-12-19
Works great on intermod. Very small, no DC needed Time Owned: unknown months.
In my area there are a number of facilities that use paging transmitters. Intermodulation problems can get pretty bad. Using the PAR VHFTN 152-158
proved to eliminate all of this! This triple cavity filter is extremely small and compact and requires no additional power to run it. A notch filtering mechanism is employed in the 158 Mhz pager frequency range and a second notch filter is used in the 152Mhz pager part of the band.

Customer support and technical help also real good! The person I spoke to over the phone had a real good understanding of his products and was quite helpful.

Try these out..I'd be curious to hear other hams' feedback on PAR electronic's filters.