SKU: 66473717545

HumDinger DC Line Blocker

Sale price$126.00 Regular price$140.00
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  • USA
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Ships within 48 hours · Estimated delivery Sep 14 - Sep 19

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Description

HumDinger DC Line BlockerWhat the HumDinger will do: Block low level DC voltage sitting on your AC power line that causes the power transformer to hum or buzz. This type of mechanical transformer hum may be caused if other devices on your power line, or devices on nearby power lines, use AC power asymmetrically. This quite common low level DC tends to make toroid power transformers hum and overload. The effect is often seen in products with toroid transformers, but its not

What the HumDinger will do:

Block low-level DC voltage sitting on your AC power line that causes the power transformer to hum or buzz.

This type of mechanical transformer hum may be caused if other devices on your power line, or devices on nearby power lines, use AC power asymmetrically. This quite common low level DC tends to make toroid power transformers hum and overload. The effect is often seen in products with toroid transformers, but it’s not limited to just toroids; thus, the non-toroid transformers can also hum depending on the level of DC voltage on the AC line.

The HumDinger also has a transient surge absorber on its incoming power circuit that will somewhat reduce turn-on surge currents in your equipment, prolonging their power switch and electronic component life.

What the HumDinger will not do:

Reduce the hum you hear out of the speakers. This type of hum is often generated in the audio circuits, or by grounding issues (normally between components). The HumDinger only reduces transformer mechanical hum caused by DC voltage on the AC line.

Provide any RFI filtering. Provide line over-voltage, surge, or lightening protection. You need a dedicated suppressor for that, the simplest being an AC outlet strip designed for computer AC line protection. You can use one of these ahead of the HumDinger if you desire.

Cure hum caused by a defective noisy power transformer.  If the transformer has a loose core that hums the HumDinger may reduce the hum slightly, but will not eliminate it.

User Manual Download

Dimensions: 4 3/4" wide x 6 3/4" deep x 2 3/4" tall

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 66473717545

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4.3 ★★★★★
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Kindle Customer
Pawtucket, US
★★★★★ 3
Socks
They fit okay and they're comfortable but the only problem I've been seeing is that they're starting to unravel at the toe end
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on September 1, 2025
B
Verified Purchase
Big ken
Alexandria, US
★★★★★ 2
Longevity of product
Tends to start falling apart after one or two washings
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Reviewed in the United States on December 18, 2025
R
Rhonda G. Fuller
Omaha, US
★★★★★ 4
My New Toeless Socks
These toeless cotton socks have been my go to socks, I have had twelve surgeries on my foot due to a car accident on my right foot. I cannot wear close toe socks as the cause swelling and pain, now I can wear these soft toeless socks with no pain or swelling. I love I have the option of three different colors as well.
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Reviewed in the United States on November 29, 2025
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Lynne F.
Natrona Heights, US
★★★★★ 3
Too small and tight
One size fits all is too small for what we needed
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Reviewed in the United States on September 6, 2025
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Troy
Grantham, US
★★★★★ 2
Started coming apart after seeing washing
Look and fit great but they starting coming apart after the second washing Possibly need stronger thread
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Reviewed in the United States on August 12, 2025

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