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Return items will be accepted within 40 days when is the date of receiving the goods. Customized items cannot be returned or exchanged. Items bought with an e-gift card are exchangeable only; refunds are not applicable.
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We will work hard to deliver items to you after receiving your orders and make sure they arrive safely. Delivery details will be provided in your confirmation email.In most cases, orders are processed within 2 days.Under special circumstances, it will be delayed as follows: When you place an order on Saturday, Sunday or public holidays, it will be delayed for 2 days..Normally, it needs 5-7 working days (Monday to Friday) without being affected by flight delay or other environmental factors..Because our shipping service is worldwide so the delivery times will depend on your location so it may need a few times and please wait patiently if you are in remote districts or countries.
1. Return & Exchange Policy
We only accept items purchased from roymall.com. If you purchase from our local distributors or other retailers, you cannot return them on our side.Final sales items or free gifts are not acceptable for a return.To be eligible for a return, your item must be unused and in the same condition that you received it. It must also be in the original packaging.After receiving return instructions from us, please package up your returned items and drop your package at the local post office or another courier. We will process your return or exchange item within 3-5 working days after we receive it. The refund will be processed and credited automatically to your original method of payment.No returns or exchanges can be accepted if the product was custom produced, including custom size, custom
color, or custom printed.Need more help, please contact us. service@roymall.com or Whatsapp: +8619359849471
2.Refund Policy
You'll get a full refund or 100% store credit after we receive the returned package and check it. The refund will be processed and credited automatically to your original method of payment.Please note that shipping costs and any duties or fees are not refundable. The extra shipping costs are non-refundable once the package has been shipped. You are responsible for paying these fees and we’re unable to waive or refund them, even if the order is returned back to us.Once we received and confirmed your returned item, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund.If you have any problems regarding the refund process, please contact us. service@roymall.com or Whatsapp: +8619359849471
Parameter:
Size: 29*24*18mm(length*width*height, irregular size, most prominent part of measurement)
Use:
Science experiments, electronic instruments, negative ion generators, scientific productions, etc.
Note:
1. The high-voltage winding of the transformer is in the inner layer. It is wound by a segmented bobbin and encapsulated in epoxy resin. The low-voltage winding is in the outer layer. Please do not mistake the high-voltage winding and the low-voltage winding for the same winding method.
2. This circuit produces a stable high-frequency arc when operating. The temperature is extremely high and it can easily ignite combustibles.
3. When the secondary high voltage output of the transformer is not connected to the high voltage rectifier diode and capacitor, the output is high frequency and high voltage electricity. When it is punctured in the air, it is a light purple arc with no hum, but the temperature is very high and the paper can be easily ignited. , Even fine iron wire (just like the scene of the burning of fine iron wire in oxygen during the junior high school chemistry experiment, but not as intense as in oxygen).
4. If the output terminal is connected to several voltage-compression circuits composed of several high-voltage capacitors and high-voltage rectifiers, DC high voltage can be generated, and negative ion generators can be produced.
5. This transformer is also suitable for 12V voltage, but it is necessary to increase the base feedback resistance to about 150Ω~1.5KΩ. The resistance value should be adjusted from large to small, and it should not be too small, otherwise it will not burn the transistor or transformer. Should be too large, affect the output effect too much or make the triode work in non-switching state and generate heat seriously.
6. The transformer is designed to have a maximum output of 15KV. The maximum limit output must not exceed 15KV, that is, a 1.5cm arc. Higher output voltages may damage the transformer. For reliable and long-term continuous work, it is recommended to completely seal it with insulating wax or epoxy resin. Work is prohibited when no work is done.
Tips:For questions about your order, place of delivery, product discount, taxation, delivery time, warranty, shipping, payment, exchange rate, and other questions unrelated to the product, please contact customer service.
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A part of the QA has been auto-translated.
0
Q:
Hi,
Do you know the Mutual coupling coefficient of the transformer? (M and the K) ?
Hi,
Do you know the Mutual coupling coefficient of the transformer? (M and the K) ?
Your description is unclear. I therefore ask you, which AC do you suggest IN? The transformer has 2+4 strands. On the page that has 4 threads -> to which should the 4 threads be linked and which of the threads should be linked to what? // Michael please respond to: *****
er beskrivning är otydlig. jag frågar därför: vilken ac föreslår ni IN? Transformatorn har 2+4 trådar. På den sida som har 4 trådar —> Till vad skall de 4 trådarna kopplas och Vilka av trådarna skall man koppla till VAD? // Michael svara gärna till: *****
Please. Measure both, primary and secondary windings with parameters:
1. DC resistance, ohm
2. Inductance, Henry
3. Enameled wire diameter, mm
And add this informations into Item description. I do this (and more measurements) for You and Your buyers, if You send me one free sample.
Please. Measure both, primary and secondary windings with parameters:
1. DC resistance, ohm
2. Inductance, Henry
3. Enameled wire diameter, mm
And add this informations into Item description. I do this (and more measurements) for You and Your buyers, if You send me one free sample.
What is the input voltage rated for? How many milliamps can the primary coil handle? Oh and it’s not a DC output and you can’t input dc into a transformer. Transformers only operate on AC input and output.
What is the input voltage rated for? How many milliamps can the primary coil handle? Oh and it’s not a DC output and you can’t input dc into a transformer. Transformers only operate on AC input and output.
Sorry, there are no accompanying files and web links. This is a very easy to use electronic component. Please understand the usage and method before purchasing. Thank you
Sorry, there are no accompanying files and web links. This is a very easy to use electronic component. Please understand the usage and method before purchasing. Thank you
Answered by wujiahui on 11/05/2019Helpful (0)
0
Q:
Merhaba
Biz elektrostatik filtrede elektronik kart devresinde kullanacağız. Çift çıkış istiyorum. 6 KV ve 12 KV . 300 a çıkış gününde olmasını istiyorum. Detaylı bilgi verirseniz sevinirim. 2500 adet ihtiyacımız var
Merhaba
Biz elektrostatik filtrede elektronik kart devresinde kullanacağız. Çift çıkış istiyorum. 6 KV ve 12 KV . 300 a çıkış gününde olmasını istiyorum. Detaylı bilgi verirseniz sevinirim. 2500 adet ihtiyacımız var