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Description
Sigma LW-20De Sigma LW 20 HF draadantenne is een veelzijdige oplossing voor radioamateurs die opereren op alle HF banden van 80m tot 6m met een externe antennetuner. Het hart van deze antenne is de 9: 1 UNUN, die de impedantie omzet van ongeveer 450 Ohm naar de 50 Ohm die je transceiver verwacht. Dit zorgt voor een efficinte signaaloverdracht en vermindert statische ruis. Kenmerken en installatie Eenvoudige Installatie: De UNUN is voorzien van een SO 239
De Sigma LW-20 HF draadantenne is een veelzijdige oplossing voor radioamateurs die opereren op alle HF-banden van 80m tot 6m met een externe antennetuner. Het hart van deze antenne is de 9:1 UNUN, die de impedantie omzet van ongeveer 450 Ohm naar de 50 Ohm die je transceiver verwacht. Dit zorgt voor een efficiënte signaaloverdracht en vermindert statische ruis.
Kenmerken en installatie
- Eenvoudige Installatie: De UNUN is voorzien van een SO-239 connector voor de coaxiale voedingslijn en twee schroefklemmen met vleugelmoeren. Eén klem is voor de antennedraad en de andere voor een aarddraad. Hoewel aarding niet strikt noodzakelijk is, helpt het om statische opbouw en blikseminslag te verminderen.
- Flexibele Montage: Bevestig het voedingspunt zo hoog mogelijk, bijvoorbeeld aan een paal of muur, en bevestig het andere uiteinde van de draad zo ver mogelijk weg. De draad kan in een rechte lijn of in verschillende vormen worden gemonteerd om in de beschikbare ruimte te passen.
Opmerkingen
- Vermogensrating: Alleen voor intermitterend amateurgebruik (400W CW of 500W SSB). Voor continue datamodi is een maximaal vermogen van 200W aanbevolen. Bij gebruik voor AM-uitzendingen is een krachtigere balun nodig.
- Externe ATU: Bij gebruik van een hoogvermogenversterker is een externe antenne-tuner tussen de antenne en de versterker essentieel om schade te voorkomen.
De Sigma LW-20 biedt een betrouwbare en efficiënte oplossing voor HF-communicatie over een breed frequentiebereik, met eenvoudige installatie en robuuste prestatie
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.1 ★★★★★
Based on 30 reviews
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Product Reviews
★★★★★ 5
These pillows are way nicer than hotel pillows!
Size: Queen / Standard, Color: White
This is a real review and I am not a robot. I’m actually sleeping with these pillows right now. They are so comfortable the right softness levels. Oh my gosh they’re awesome. I don’t know about hotel pillows, but these are way better quality form with your head and you sleep like a baby.
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Reviewed in the United States on May 29, 2026
★★★★★ 5
Absolutely Amazing!! Truly the perfect pillow!
Size: Queen / Standard, Color: White
I absolutely love these pillows. They couldn't be more perfect! I have spent years buying and throwing out pillow after pillow. I struggle with a lot of neck and upper back pain and I struggled even more trying to find the right pillow on top of spending several hundred dollars on pillows that just got tossed. If you want a great night of sleep and you want to wake up feeling refreshed and not struggling with fatigue and every day neck or back pain you absolutely MUST give these pillows a try!!! They are super easy to wash, made with great quality and have not once bothered my many allergies like most pillows do. I have not noticed any of the chemical odors moat pillows give off, easy to adjust does great with just occasional fluffing. So far has stayed fluffy for me although I did put it in the dryer a time or two as the instructions stated to help with extra fluff and also because I couldn't wait for them to air fluff when they first arrived, an Air B&B we stayed at had these and I ordered them before we even headed back home I loved them so much I had to order my own and was too impatient to wait!
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Reviewed in the United States on May 30, 2026
★★★★★ 4
Comfortable Support
Size: King, Color: White
These bed pillows provide good comfort and support for sleeping, with a nice balance of softness and structure. They hold their shape fairly well and work for both back and side sleeping positions. The overall feel is comfortable and helps improve sleep quality.
Overall, they are reliable everyday pillows that offer good comfort and support.
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Reviewed in the United States on May 8, 2026
★★★★★ 5
Very comfortable. On the soft side.
Size: Queen / Standard, Color: White
Soft, but not too soft. I would actually give 4.5 stars. The pillow is a bit too long and bulky, wish it had a bit more support, but overall, great purchase considering the price. Hopefully it doesn't degrade after washing.
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Reviewed in the United States on May 24, 2026
★★★★★ 5
Excellent pillows that are worth the cost
Size: Queen / Standard, Color: White
These are wonderful. Completely relieved my back pain the first night I slept on them -– I put one underneath my back as I slept, and a weeklong terrible pain vanished overnight. Felt like sleeping on a cloud. As others have noted, they are neither too soft nor too firm…they’re really just right, and I think would make great guest room pillows since everyone would like them. These were definitely worth the money.
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Reviewed in the United States on June 5, 2026