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low
A low-pass filter (LPF) is a filter that passes signals with a frequency lower than a selected cutoff frequency and attenuates signals with frequencies higher than the cutoff frequency. The exact frequency response of the filter depends on the filter design. The filter is sometimes called a high-cut filter, or treble-cut filter in audio applications. A low-pass filter is the complement of a high-pass filter.
In the optical domain, high-pass and low-pass have the opposite meanings, with a "high-pass" filter (more commonly "long-pass") passing only longer wavelengths (lower frequencies), and vice-versa for "low-pass" (more commonly "short-pass").
Low-pass filters exist in many different forms, including electronic circuits such as a hiss filter used in audio, anti-aliasing filters for conditioning signals prior to analog-to-digital conversion, digital filters for smoothing sets of data, acoustic barriers, blurring of images, and so on. The moving average operation used in fields such as finance is a particular kind of low-pass filter, and can be analyzed with the same signal processing techniques as are used for other low-pass filters. Low-pass filters provide a smoother form of a signal, removing the short-term fluctuations and leaving the longer-term trend.
Filter designers will often use the low-pass form as a prototype filter. That is, a filter with unity bandwidth and impedance. The desired filter is obtained from the prototype by scaling for the desired bandwidth and impedance and transforming into the desired bandform (that is low-pass, high-pass, band-pass or band-stop).
Decided to post up the AR10 to fund some other hobbies.
<200 round count, mostly sat in the safe
Colt Modular Carbine in 308, with a Hiperfire Reflex trigger, full length factory M-lok rail, factory ambi controls.
Overall a great gun, very light trigger, but not a set up that I'm getting much...
Ruger Precision rifle in .308. Less than 300 rounds through it. Does not come with scope or bi pod, but will come with custom padded hard case and three mags. Only looking to sell at this time. Asking $1,100 OBO. It is in flawless condition and works wonderfully, but I just don't have the time...
Looking to sell my Trijicon MRO on an ADM low
Mount.
Works perfect, with case and paperwork
203xxx serial..
$375 in Vancouver.
Might trade for a nice LPVO
I can add cash or ammo
Thanks
Bassett Machine Picatinny Rail Low Mount package #SMPR-Lo for M-14
The package includes the Mount , a special torque wrench for mounting and full instructions. I got this in trade but I do not have an M14 or M1A so I am seeing if anyone wants it. It appears unused . Price was $159.50 before...
***SPF***
Excellent condition, fired less than 50 rounds with it installed. It does not work the way I want it to for my application.
Only trade would include the full mass variant in like condition.
Lightweight, stainless steel bolt carrier has significantly lower reciprocating mass than a...
Looking to sell this M2 I got in a trade. The guy before me set it up for 3 gun competition but his wife wouldn't let him do it so I traded him a motorcycle. I put a box of shells through it and decided it wasn't my thing. Comes with chokes, sling, sidesaddle carrier, and I think the stock is...
Sorry this item has sold
NEW BCM Low Profile Gas Block (steel with set screws) .750
I take PayPal friends and family
Shipping OK,
No trade requests please.
No face-to-face sales requests please
Parting out BCM upper [ receiver, barrel with low pro gas block, mid-length gas tube, handguard, BCG, and charging handle. ]
Parts will be marked as new or used
1. Complete upper BCM receiver (with Strike industries enhanced dust cover and standard forward assist) $100 (NEW)
SOLD...
I've got two cases (250 rounds each) of Nobelsport low recoil 12 gauge 00 buckshot. This is 9 pellet going 1200fps so it should be a bit more comfortable to train with, but it can still put a wallop on target if need be.
Price is $300 for all 500 rounds, $160 per case, or $8 per 10 round box if...
Hello everyone! I have a Romeo 5 red dot never been fired with, I purchased it as a back up and threw it on my Marlin 30-30. I like the idea of a red dot on the brush gun but I’m looking for something smaller and open. What are you thoughts? Thanks for your time.
Hi all,
I have an American Defense Manufacturing AD-Recon-SL 30mm QD scope mount for sale.
Note that this is a low mount, with no forward/back offset. Rail to scope centerline is only 1.152". It works best on bolt actions, you'll probably want a riser on ARs. Just the mount, no box, no tool...
Has seen less than 100 rounds through it. Comes with the 1/3 co witness Mount and the flush Mount. Has all the tools necessary for takedown. Minimal usage on the threads. Has original contents including the sticker and cleaning wipe. I paid 544 I’m asking 400. Color is red.
Selling my lightly used Sig Romeo 5 Red Dot 2MOA
Comes with low & 1.41” picatinny mounts
It’s in great condition
Includes lens covers
$100 local
$108 shipped
Selling my lighty used Sig Romeo 5 red dot with low & 1.41” picatinny mount
It’s in great condition
Includes covers
2 MOA
$100 local
$108 shipped
https://www.amazon.com/Sig-Sauer-SOR52001-Romeo5-Compact/dp/B01C95I8N4