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Description
Sensor Transistor and Biasing Trimmer (Beogram 4002, 4004 and 4000)Beolover Sensor Arm LED Light Source for Beogram 4002 4 and 4000: Replaces the sensor transistor and biasing resistor in any Beogram 4000, 4002 and 4004. Many original transistors lost some of their gain, which may disable the record detection function. As a consequence the arm may drop on an empty platter. Ouch!!! Replacement ensures that the record detectionj functionality works properly. Replacing the original fixed value biasing resistor with a
Beolover Sensor Arm LED Light Source for Beogram 4002/4 and 4000:
- Replaces the sensor transistor and biasing resistor in any Beogram 4000, 4002 and 4004.
- Many original transistors lost some of their gain, which may disable the record detection function. As a consequence the arm may drop on an empty platter. Ouch!!! Replacement ensures that the record detectionj functionality works properly.
- Replacing the original fixed value biasing resistor with a 5MOhm trimmer allows adjusting the bias to meet the gain spec given in the manual (4V at collector)
- Direct drop in replacement. Replaces 1TR3/R26 in DC motor Beogram 4002 (Type 551x/552x), 1TR9/1R33 in AC motor Beograms (Type 550x) and 1TR14/1R33 in Beogram 4000 models.
- Comes with alignment fixture to position LED board in correct location.
- See this Beolover blog post for an introduction to the restoration of the sensor arm and record detection circuit.
- Installation requires soldering/desoldering capability, and potentially requires an oscilloscope for trouble shooting. Some experience with electronics is helpful.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
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4.0 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 3
Decent but magnet isn’t strong enough
Style: 15W Charger
Unit appears well made and I feel like it minimizes any potential damage to the screen. For me, magnet just wasn’t strong enough and I wasn’t a fan of the cable - would be nice if product had clips for cable management or something to give it a cleaner install. If it wasn’t for the magnet issue, I probably would have kept. Returned.
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Reviewed in the United States on March 24, 2026
★★★★★ 5
Really a nice product!
Style: 15W Charger, Style: 15W Charger
I wanted a nice magsafe charge/holder for my phone and I tried this one and so far, it's great.
Pros:
- It has a really nice-looking LED behind the magsafe holder which glows nicely, as you see in the pic.
- The plastic feels good, strong and (hopefully) not plastic that degrades and becomes brittle.
- The rubber bumpers which hold it in place under the mount against your display seem well-placed.
- It's fully adjustable between positions wherever you wish to mount it.
- You can mount your phone either above or to the side of the display on any corner which provides nice flexibility.
- I found it best on the upper right because on the left, the steering wheel obscures the phone and the two bottom corners aren't useful to me.
- The little knobs work well to hold it in place and tighten nicely.
Cons:
- The only problem is how the design has the cable visible and sticking out when it could have easily been designed to integrate into the little arm so it's hidden. As it is, the ugly, out of place and avoidable USB-C cable is visible which I don't like.
- You can rotate the holder to make the USB-C cable appear in front of the arm holder so it's less visible but it should have been avoided with a simple design modification and integrated USB cable for a more streamlined appearance.
In any case, this is a nice addition to my Model 3 Performance to hold my phone while I drive, out of the way while still charging.
Try one.
M
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Reviewed in the United States on January 9, 2025
★★★★★ 5
Reliable, Fast, and Worth Owning More Than One
Color: White, Set name: 2 Pack, Color: White, Set name: 2 Pack
Here’s a polished, strong 5-star Amazon review you can use (feel free to tweak tone or length):
⸻
Title: Reliable, Fast, and Worth Owning More Than One
I’ve used a lot of magnetic wireless chargers over the years, and these are easily among my favorites. I actually own several already, and this 2-pack just reinforces why I keep coming back to them.
First, the magnetic connection is strong and consistent. It snaps into place cleanly and stays aligned, which is critical for maintaining efficient charging—no waking up to a half-charged phone because it shifted overnight. That alone separates these from cheaper alternatives.
Charging speed is solid and dependable. While I wouldn’t expect wired-level speeds from any wireless charger, these perform exactly as advertised and more importantly, they’re consistent. No overheating issues, no random drop-offs—just reliable performance day after day.
The build quality also stands out. The cables feel durable without being stiff, and the charging pads themselves have a clean, minimal design that works well on a nightstand, desk, or even while traveling. Having a 2-pack is especially convenient—I keep one by my bed and one at my workspace, which has made my setup much more seamless.
If I had to point out anything, it’s that like all magnetic chargers, performance is best with a compatible case or no case at all—but that’s standard across the category, not a knock on this product.
Overall, if you’re looking for a dependable, well-built magnetic wireless charger that just works every time, this is an easy recommendation. The fact that I continue to buy more says everything.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Not a super fast charger but convenient.
Color: Black, Set name: 2 Pack
Works well with induction-compatible iPhones. It's great with a iPhone 14 Pro. It will also charge a 16e, although the 16e is not equipped with MagSafe--that's just the magnet that holds the charger on. The 16e must be placed on top of the charger and carefully positioned for it to work.
In my tests the charger drew about 1.7A @ 9V, for a total of about 10W. How much of this is absorbed by the phone is unknown, but probably most of it. this is not a super fast charge, but fine if you're leaving it for the night. The phone and charger do get warm, so some power is wasted. The heat is not a problem, though, since the phone gets warm when plugged in via the Lightning port, too.
Some reviewers have mentioned tha the charger is rounded which means you can't leave the phone+charger on a surface. There is a flat spot on the charger, and I have no problem leaving the phone charge overnight.
I find the cable long enough to reach the charger plugged into the wall near the floor, but that depends on your situation. Of course, if it's not long enough, there's not much you can do but move things around!
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Reviewed in the United States on March 24, 2026
★★★★★ 5
Great Anker Charger
Color: Black, Set name: 2 Pack
Product build quality is great, on par with all other Anker products. Charging is very quick on Pro Max models with 20 watt charging brick and easily connects with USB-C. MagSafe charging works really well, magnets create a strong connection. Only the charging pucks are included.
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Reviewed in the United States on April 28, 2026
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