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DIY Kits 70w SSB Linear HF Power Amplifier for Yaesu Ft-817 Kx3

3.5159 product ratings

2012Moon816 (27185)
98.6% positive feedback

Price:

$26.98

+ US $3.88 shipping

Estimated delivery Thu, May 23 - Mon, Jun 3

Returns:

30 days returns. Buyer pays for return shipping.

Condition:

New

Suitable for FT-817 KX3 other small power stations. Frequency range 3.5--30Mhz (10M - 80M). Maximum output power: 70W. Circuit class AB linear amplifier for SSB AM CW FM power amplifier for low-power radio power connection.

About this product

Product Identifiers

GTIN
0908969771064
UPC
0908969771064
eBay Product ID (ePID)
517120732

Product Key Features

Supported Modes
SSB
Band
HF
Type
Power Amplifier

3.5

3.5 out of 5 stars based on 59 product ratings

59 product ratings

26 users rated this 5 out of 5 stars
9 users rated this 4 out of 5 stars
6 users rated this 3 out of 5 stars
5 users rated this 2 out of 5 stars
13 users rated this 1 out of 5 stars

Would recommend

Good value

Good quality

Most relevant reviews

See all 45 reviews

5 out of 5 stars
by alvarofelipeFeb 02, 2018
Top favorable review
Excellent amplifier in kit, but not for beginners.
This class AB RF amplifier is sold widely on Chinese Webs. It really works perfectly, but it is not suitable for beginners. First: It is not accompanied by a scheme. Second, the SMD components are not identifiable with the naked eye, so you have to use measuring devices, in the case of capacitors, of those used in a laboratory. There is a lack of instructions such as that parts of the printed circuit must be cut to make the support of the ferrite transformers. Fortunately, on the Internet it is easy to find blogs and videos that describe the problems to build this Kit, a symptom that is very popular and sold. The most important: It can not be used without a low pass filter attached to the emission band. That detail is very important and is omitted by the sellers. In my case, it worked perfectly, although it does not really reach 70 W of antenna power. For the price of the Kit, which does not exceed the price of the components, I am very satisfied. EA8ARX, Álvaro Felipe Hernández.Read full review
Verified purchase: Yes | Condition: New
3 out of 5 stars
by ghbyrkitFeb 15, 2018
Top critical review
Kit WITHOUT instructions
This kit has good design and parts. What it is lacking is assembly information, a parts list, diagrams showing what parts go where, etc. Heck, there isn't even a schematic! Yes there are some youtube videos on this item, showing some flashes of a schematic, but that is NOT enough. These items MUST come with each kit! Or else the seller is just relying on others, and not providing added value. Given how hard it is to find the information, and nothing that traces the design to its original source that I have found, I'd skip this kit.
Verified purchase: Yes | Condition: New
5 out of 5 stars
by skyryder5007Jul 31, 2019
Good little amp
Works ok with Transistor given irf530's. Bout 65w bird peak with tone and 14v., Still needed fine tuning for the HF frequency I use, Really a Nice project kit. If you have a Antenna analyser you can tweak input and output (no power on board) to the HF frequency you'll be using it for. I Will be trying a pair of ERF9030 transistors with next purchase of boards. Fun Stuff! I was able to convert one of two of my boards that I ordered to the mrf186 mosfet with little work and personal knowledge of amps... 140w 28v CW bird. I used the other board in the rear of super star 121 radio, using a old Magnum radio heatsink and cut out chassis for transistors to heatsink, mounted board to inside chassis with nylon standoffs, power wires from inside power connector, used a 10amp 12v relay and keying circuit to complete it. Used one of the front panel switch hi/lo to turn amp off/on, (sort of like an XRF75/150) and using the irf530 transistors supplied in kit. Good luck with your project amp! 73'sRead full review
Verified purchase: Yes | Condition: New
5 out of 5 stars
by outport101Jan 23, 2019
Title is correct.
This kit is only for experienced builders with proper soldering equipment and an understanding of FET amplifier construction. You will get a bag of very small surface mount parts. The value s an excellent printed circuit board. No schematic or instructions are included but can be found on-line.
Verified purchase: Yes | Condition: New
1 out of 5 stars
by pigeon6019Mar 31, 2020
I feel ripped off!!!
The kit was sent to me with a hole in the bag missing one part and one part fell out in the mailed envelope. MOST IMPORTANT THERE ARE NO DIRECTIONS. THERE ARE NO SCHEMATICS. THERE ARE NO INSTRUCTIONS OR DIRECTIONS TELLING ME HOW MANY TURNS FOR THE TRANSFORMERS. THERE WAS NOT ONE PIECE OF PAPER SENT WITH THE KIT EXPLAINING WHERE THE PARTS GO WHAT THE VALUES ARE, THERE ARE NO PART INDICATORS ON THE BOARD SUCH AS R-1 OR C-13, AS AN EXAMPLE. I BELIEVE I SHOULD BE COMPENSATED FOR THIS ITEM BY SENDING ME EITHER THE INSTRUCTIONS OR DIRECTIONS ON HOW TO PUT IT TOGETHER, WHAT PART GOES WHERE, HOW MANY TURNS ON THE TRANSFORMERS, OR JUST ANOTHER LEGITIMATE KIT, RATHER THAN JUST A BUNCH OF PARTS THROWN IN A BAG AND SENT TO ME, WITH ONE RESISTOR MISSING.
Verified purchase: Yes | Condition: New

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Picture 1 of 10

DIY Kits 70w SSB Linear HF Power Amplifier for Yaesu Ft-817 Kx3

About this product

Product Identifiers

Product Key Features

Ratings and Reviews

Most relevant reviews

Excellent amplifier in kit, but not for beginners.

Kit WITHOUT instructions

Good little amp

Title is correct.

I feel ripped off!!!

Best Selling in Ham Radio Amplifiers

KENWOOD TL-922A Power / Mode Rocker Switch S36-2401-05

HG 2SC2879C 12.5V 28MHz RF Power Transistor for SSB Linear Power Amplifiers

Hg(huagao) 4 Pcs 2sc2290(mq) Build by China HG Semiconductor

High pass filter LC filter SMA BNC interface shielding box 1MHZ-1000MHZ can be*

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