Radioddity PAX100 is a mini RF power amplifier DIY kit using MOSFETS and is specially designed for Xiegu G90 and X5105 radios. It can achieve 100W power output with an input power under 10W. The design is extremely compact and light-weight. Nothing like it is available in its power vs. size rating.
• Upgraded red PCB board & protective case
• Upgraded fuse box for the power cord
• Better soldering design
New Available Accessories:• 1. Radioddity LPFX7 low pass filter (plug and play | full-band low pass filter)
• 2. Radioddity LPMX2-1 & LPMX2-2 filter model DIY kits (need to be soldered by yourself)
Up to 100W Power Output
This amp is capable of up to 100W output on 20 meters and below. 70 watts is typical in the higher bands. The amplifier connects to the G90 or X5105 to perform RX/TX switching. It uses two inexpensive 55-watt IRF 350’s as the final amplifier devices.
Specially Built for Xiegu G90 & X5105
Radioddity PAX100 is specially designed for Xiegu G90 & Xiegu X5105. It covers the 3 MHz～30MHz frequency range and modes including A1A (CW), J3E (SSB), A3E (AM), F3E (FM), F7M (C4FM), F1B (FSK).
Solid Material & Accessories
The PCB uses a double-layer immersion gold finish providing long and stable operational life. It comes with an XT60 power supply connector which can easily handle its max current draw. Any type of power connector can be mated to it. Since it uses gold-plated SMA connectors, it comes with input and output adapter cables to male and female PL-259/PL-239 connectors. We also provide the PTT trigger cable. It can be used with ours and many other QRP radios.
Heat Dissipation Details
The amp uses a large aluminum heat sink. The whole PCB secures directly to this heat sink. High-conductivity interface materials are used to dissipate maximum heat and provide stable operation. A cooling fan is installed on one side of the heat-sink with 2 cooling modes. It is a low-noise model that provides excellent CFM.
Plug and Play
Different from other amplifier kits, Radioddity PAX100 comes with a PTT Trigger Cable connecting to the G90/X5105. Simply press the PTT key of G90/x5105 to transmit and PAX100 will automatically amplify the output power to 80-100W without any other operation.
Portable & Non-slip Design
It’s dimensions are (4.33 x 1.97 x 1.57 in). This DYI power amplifier kit only weighs 0.5lb. It is surprisingly small and has 4 non-skid pads on the bottom of the heat-sink. A beautiful clear poly-carbonate top mounts above the circuit board to protect it.
Frequency Range: 3 MHz～30MHz
Supported Modes: A1A (CW), J3E (SSB), A3E (AM), F3E (FM), F7M (C4FM), F1B (FSK)
Power Supply Voltage: DC 12V ～ 18V
Power Supply Current: Standby 0.2A | Transmit 12A maximum
Input SWR: <2.0: 1
Input / Output Impedance: 50 ohms (± 10%)
Through Loss: less than 0.5dB
Power Gain: greater than 15dB (± 2dB)
Maximum Input Power: 10W
Maximum Output Power: Input 5W, frequency <21MHz, power supply 15V = 100W
Input 5W, frequency> 21MHz, power supply 15V = 70W
Low-pass Filter: Built-in 10, 15 and 17 meter band filters
Low-pass Filter Frequency: 33MHz (-6dB)
Harmonic Output: greater than -50db (even order), greater than -30dB (odd order)
Spurious Output Suppression: greater than 40dB
Input / Output Connector: SMA-K
Working Temperature: 0-50 ℃
Storage Temperature: -20-70 ℃
Storage Humidity: less than 55%
PTT Trigger Level: + VCC-2V (low trigger), GND + 5V (high trigger)
PTT Trigger Current: 2Ma
Product Size: 110 x 50 x 40mm | 4.33 x 1.97 x 1.57in
Product Weight: 230g | 0.51lb
1. Transmitting with an open circuit or short circuit will damage the amplifier.
2. Antenna standing wave ratio of under 2.5 to 1 is required
3. Maximum power input is 10 watts
1. This amplifier does not have an antenna tuner.
2. Hardwired connection for PTT is required for functioning.
Q & A:
Q: What is the difference on yours, yours is quite expensive I have seen similar amp going for cheaper on eBay.
A: It's a totally different product from what you saw on eBay or Alibaba. We made so many efforts to improve it. This version on eBay is not stable with only 50W sometimes and different performance for different radio (said compatible with many radios). We abandon the compatibility of ICOM and KW23.
What are the differences
1. Built-in 10, 15 and 17 meter band filters
2. Data adjustment for G90 & X5105 only (even not G1M)
3. Trigger cable/connector for G90 & X5105
4. Copper core feeder added
5. Plug and play for G90 & X5105, stable output
6. Circuit optimization
7. We improve some soldering parts for safety
All of the above have made its cost way more expensive than other versions you can see on eBay and Ali.
Q: Is soldering surface mount components needed? How long would it take to put together?
A: No, plug and play for PAX100 + LPFX7 + G90. If you've already had a DC power, 2 minutes.
If you prefer the filter model LPMX2 instead the LPFX7 with single-band filtering, you need to solder.
Q: Does the LPFX7 filter sit alongside the amp or does it fit inside the amp housing? If it goes alongside, do you include the cables needed to do all the connections? If I buy both, is anything missing that I need to connect it all?
A: It goes alongside. Both of them are with all the connectors and cables you need to install (except for the power plug). Refer to the following images to install. What you need is a DC power source.
Q: Is the power to the amp always on? Is there a switch?
A: For the amp, there is no power button. For the LPFX7 filter, it's with a power button, and 4 switches with LED to help you select the band you need.
Click Here to download.
What's in the box
1 x Radioddity PAX100
1 x Power Cable
1 x SMA to PL-259 adapter cable
1 x SMA to SQ-239 adapter cable (female)
1 x G90/X5105 PTT Trigger Cable
1 x Installation Guide
1 Year and 6 months Manufacturer's Warranty.
• Radioddity's limited warranty applies to all BRAND NEW items sold by radioddity.com and other authorized dealers.
• This warranty is non-transferable and proof of purchase from us or an authorized dealer is required for warranty service.
What Does This Limited Warranty Cover?
We warrant that the Products are free from defects in materials and workmanship under normal use and use in accordance with the respective Product user manual, during the Warranty Period. Please refer to the Instructions inside each package for a description of proper use and care of the unit.
What Does This Limited Warranty Not Cover?
This limited warranty does not cover damages directly or indirectly arising or resulting from or during:
(1) accident, misuse, abuse, vandalism or acts of God (including lightning and other weather conditions)
(2) use with another product or other damage or loss suffered by the use or combination of any other item
(3) improper or inadequate maintenance
(4) repairs by an unauthorized service technician
(5) normal wear and tear
If you are satisfied with our products and service, please kindly leave us a positive product review. Any problem, be free to contact us firstname.lastname@example.org
We strive to answer all emails as quickly as possible, but due to high email volume, it may take time for us to reply. Thanks in advance for your patience!
Frequently Asked Questions
- 1. What forms of payment do you accept?
- 2. Why has my credit card payment failed?
- 3. How do I know if it is safe to shop with you?
- 4. Is there any discount for bulk/volume purchases?
- 5. Do you ship internationally?
- 6. How can I contact Radioddity.com for additional assistance?
- 7. How are warranties handled?
- 8. Why didn't I receive an order confirmation email after my PayPal payment is completed?
- 9. How do I change the shipping address or cancel my order?
- 10. What does Radioddity.com charge for shipping order and how long will it be before I receive my order?
- 11. Do you ship to PO boxes or Military APO/FPO addresses?
- 12. Why am I unable to track my order?
- 13. Taxes, Customs, & Duties
- 14. How do I return products if I am unsatisfied?
- 15. What do I do if I received the wrong item?
- 16. How do I return defective items?
- 17. When will a replacement be sent?
- 18. How long does it take for me to get a refund?
- 19. which warehouse should I choose?
- 20. What are the extra shipping regulations on battery?
1. What forms of payment do you accept?
Radioddity.com currently accepts PayPal* or credit card for all orders.
*When purchasing with PayPal, your shipping address will automatically default to the address on file with PayPal, regardless of the shipping address you enter on your Radioddity.com order.
2. Why has my credit card payment failed?
Payment with a credit card may fail because of bank authorization and fraud prevention systems. If you are having trouble making a payment via Credit Card, you may contact your card issuing bank or PayPal directly. Here are PayPal's phone numbers:
+1-888-221-1161 (US & Canada Toll Free) +1-888-215-5506 (US & Canada Toll Free)
+1-402-935-7733 (International) +1-402-935-2050 (International)
3. How do I know if it is safe to shop with you?
Radioddity.com takes great pride in offering a safe and secure online shopping experience. We also respect your privacy and we're committed to protecting it.
4. Is there any discount for bulk/volume purchases?
Radioddity does provide discounts for some bulk/volume purchases. Please email our customer service for more details.
5. Do you ship internationally?
Yes, we do! Except for Iran, Cuba, North Korea, Sudan, Syria, the Moon...
6. How can I contact Radioddity.com for additional assistance?
Email Customer service:
please email us via email@example.com, and we will respond to your email as quickly as possible, usually within 24-48 hours.
7. How are warranties handled?
Repairs on defective merchandise are handled by the manufacturers and not by Radioddity unless otherwise indicated. If any item arrives damaged due to shipping, immediately contact the courier. Keep all shipping materials and contact us immediately.
8. Why didn't I receive an order confirmation email after my PayPal payment is completed?
We send a confirmation email to your primary PayPal email address or the e-mail address you have specified if you used the "PayPal Express Checkout" method. Make sure that you have a Radioddity account registered under your PayPal account's primary e-mail address.
In rare circumstances, a technical bug confirmed by PayPal can get in the way. If you do not receive any information at all, and your order does not appear in your Radioddity account, please contact us and send us your order details.
9. How do I change the shipping address or cancel my order?
Please contact customer service immediately if you need to change the shipping address or cancel your order. Please be advised that some orders are shipped very soon after payment and it will not always be possible to make changes to the shipping address and/or cancel the order.
10. What does Radioddity.com charge for shipping order and how long will it be before I receive my order?
For Standard shipping (China Post or EMS ePacket), free shipping to the USA, Canada, and Australia. $7.50 to other countries by China Post and it will reach you 20-25 business days.
For Express shipping (UPS/DHL /EMS), $13.50 to the USA and $19.99 to other countries. It will reach you in 3 to 5 business days by UPS and DHL but 10-15 businesses days by EMS.
11. Do you ship to PO boxes or Military APO/FPO addresses?
Only USPS can ship to both PO Boxes and Military APO/FPO addresses. The items have to be less than 2kg. Please allow additional time for orders to be shipped to these addresses. Express shipping cannot be sent to both PO Boxes and Military APO/FPO addresses.
12. Why am I unable to track my order?
It can sometimes take 24-48 hours or so for tracking information to update once an order has shipped from our warehouse.
Occasionally, a package may not receive the proper origin and transit scans while on its journey to you, so neither us nor express is able to track the exact location of the package in transit.
Please email us if you do not receive your order by the end of the quoted time frame. Please note that orders shipping via UPS can be delivered as late as 9:00 pm local time in some areas.
13. Taxes, Customs, & Duties
If the package is checked by your country's customs office when the item arrives in your country, most websites are declaring that you are responsible for import duties, tariffs, and taxes. However, Radioddity will be happy to go fifty-fifty with customers. Quality customer service is our highest value and we try our best to reduce our customer’s loss.
Note: If you refuse to go with fifty-fifty, please do not select Express Shipping method. If items have to be returned to China since your refusing to pay taxes or customs, shipping fee will not be refunded. For free-shipping order, 10% of your order value will be charged a return shipping fee (refund 90% only.)
14. How do I return products if I am unsatisfied?
If you are not 100% satisfied with your purchase, you can return your order within 7 days to our warehouse for a full refund. Please contact us for return address before you send it back. Please be advised that customers are responsible for all return shipping charges. Once your return is processed, you will receive a refund (including the return shipping fee) back to the original method of payment.
15. What do I do if received the wrong item?
Return the wrong item. If the item you received is completely different from the one you ordered, please contact our Customer Service with photos or videos of the different product. If a return is necessary, replacement plus return shipping cost will be issued to you on receiving the returned product. Or if you decide to keep it, we will offer a 10% discount for buying it.
16. How do I return defective items?
If your product turns out to be a defective one with physical damage within 30 days from the initial receiving date. You can mail the item back in the original package without any wear and tear for a free replacement. However, you will need to provide photos and videos showing the defect(s) of the product.
*NOTE: We strongly recommend obtaining and saving your return tracking number until you are notified that we have completed your refund.*
17. When will a replacement be sent?
Replacements are treated the same way as that of new orders -- they typically arrive in 10 to 13 days. If a product needs to be returned for replacement, the replacement is sent after receiving the returned item.
18. How long does it take for me to get a refund?
It may take 1 or 2 weeks for your return to reach our warehouse. Once it is received and inspected (usually within 72 hours of arrival) your refund will be processed and automatically applied to your credit card or original method of payment within 2 days. Please note that depending on your credit card company, it may take additional 2-10 business days after your credit is applied for it to post to your account.
19. Which warehouse should I choose?
Chinese warehouse is for customers from all over the world except for the Philippines, Middle East countries, Brazil due to customs regulations.
US warehouse is for the US except for Hawaii Islands. Please leave your telephone number if your shipping address is PO BOX!
UK warehouse is for the UK only.
Germany warehouse is for EU countries only.
20. What are the extra shipping regulations on battery?
Batteries alone/with other accessories cannot be shipped from Chinese warehouse. Please order it with a radio!
Express shipping can carry no more than two batteries in a package, which means one radio(with an original battery) plus one spare battery is OK, but one radio (with an original battery) is unacceptable.
Batteries alone/with other accessories can be shipped from an overseas warehouse.