Can this work with ham it up plus or would it i need it for ham it up plus? i want to pick up ulf and elf signals without am overloading things.

No. This is a high pass filter, which cuts signal levels by approximately 30db below about 2 MHz- including elf/ulf signals below 300 khz. You want a low-pass filter with a cutoff frequency below 500 khz.

I just got this today and it does nothing for me:-( Is it directional? I have tried it both ways, with absolutly no difference at all:-(

If you're not having overload problems from a nearby AM transmitter, you won't notice any difference. It made all the difference in the world on mine, it was overloading so badly I couldn't use 80m or below. I don't think it matters which way you put it inline. If you have other problems, it won't help, it only works for AM band overload.

Is this a series or parallel trap circuit?

Looks like a series trap. -C-C-C- | | | C C C | | | L L L | | | G G G

Will this help with images from a.m. bcast I'm getting elsewhere, ie. 10-11 metres?

It should, it says high pass so it should cut off just below the 80m band. I have several local AM stations that were coming in on 80m and 40m, making 40m noisy and 80m unusable. This filter fixed both problems, it was night and day. If you're using a random wire antenna without a counterpoise you may still have some problems.

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Broadcast AM Reject High Pass Filter (2.6 MHz HPF) by RTL-SDR Blog

Product ID: 44630462

Details

Antenna
Radio
Brand
RTL-SDR Blog
Compatible Devices
Desktop Laptop
Connectivity Technology
Radio
Connector Type
SMA Female

⚡2.6 MHz sharp 3 dB roll-off

📶50 dB AM band attenuation

🔌SMA Female connectors

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Description

📡 Cut the static, catch every wave — your SDR’s new secret weapon!

PLUG PLAY WITH SMA - Compact design with SMA Female connectors for seamless integration with your SDR setup.
PRECISION HIGH PASS FILTERING - Sharp 3 dB roll-off at 2.6 MHz ensures optimal performance on 80 meters and above.
ENGINEERED FOR SERIOUS LISTENERS - Robust build quality trusted by ham radio enthusiasts and shortwave pros alike.
BLOCK THE NOISE BOOST THE SIGNAL - Over 50 dB attenuation eliminates overpowering AM interference for crystal-clear reception.
UNLOCK YOUR SD RS FULL POTENTIAL - Perfect companion for V3 dongles and direct sampling mode, maximizing dynamic range.

The RTL-SDR Blog Broadcast AM Reject High Pass Filter is a precision RF filter designed to block the broadcast AM band (500 kHz - 1.7 MHz) with over 50 dB attenuation, featuring a sharp 3 dB roll-off at 2.6 MHz. Ideal for SDR users, it reduces overpowering AM signals to enhance reception quality, connects easily via SMA Female connectors, and is optimized for use with V3 dongles and direct sampling modes.

Specifications

ASIN	B01N9SHS7P
Best Sellers Rank	#90,261 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #5 in Radio Frequency Attenuators
Brand Name	RTL-SDR Blog
Customer Reviews	4.5 4.5 out of 5 stars (192)
Date First Available	January 16, 2017
Item Weight	0.634 ounces
Item model number	4330366330
Package Dimensions	4.06 x 2.64 x 0.67 inches

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Bs.676

Duties & taxes included

In stock

Sold byAmazon BoliviaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Bolivia.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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3 weeks ago

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