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Assembly Guide for the 1KW 222MHz LDMOS Amplifier Kit

Get fast, free shipping with Amazon Prime. Please make sure that you are posting in the form of a question. One additional component L3, a 5nh inductor should be added across the gate pads as shown at the end of this document.

AmazonGlobal Ship Orders Internationally. Turn on 1-Click ordering for this browser. Note the polarity marking on the electrolytic capacitors Now connect the 12 ohm coax as shown in the second picture. Amazon Restaurants Food delivery from local restaurants. Increase drive until you have 1kw out. The space between the capacitors is small, be careful to avoid solder shorts that bridge this gap.

This provides some spacing away from the electrolytic cans. The newer kit, with board rev 4d or higher, is constructed differently, and the assembly guide for that page is located here:.


Have one to sell? Input power should be less than 4w, and drain current less than 30A at 50v.

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American Technical Ceramics (ATC) 700B-

Image Unavailable Image not available for Color: Alexa Actionable Analytics for the Web. My guess is that there are variations in devices from lot to 700, and I finally used one with a bit more low-frequency 700b than the others. Verify that the bodies of the capacitor pairs are not shorted to one another.

Only 1 left in stock – order soon. However, this inductor reduces the low frequency gain of the circuit without affecting the performance of the amplifier at MHz, and eliminated the instability completely. See more product details.

American Technical Ceramics (ATC) B-

Once you install the boards, and you are ready to test, here’s the recommended method:. Your ohmmeter will probably show the charging of the electrolytic capacitors attc first, but then the traces should read open. Product details Product Dimensions: Amazon Renewed Refurbished products with a warranty.


Check the two 50v power input traces for a short. Amazon Inspire Digital Educational Resources.

Trimmer capacitor – after placing the part, align the slot on the trimmer capacitor vertically this will place it mid-range. ComiXology Thousands of Digital Comics. Tune the input trimmer cap for lowest input SWR or highest drain current.

American Technical Ceramics Corp.

Write a customer review. I used a zero ohm chip resistor here, but a jumper of any sort will work. The shape and value of this part is not critical; it’s purpose is to ensure stability by reducing the low frequency gain of the circuit. Solder the shield to the left trace, and the center conductor to the right trace as shown.

Moving to the input board now, load the components shown. Get to Know Us. Turn on the 50v main supply voltage, but not the bias; there should be no current drawn.