25W Linear RF Amplifier Board 2.3-2.35 GHz 18dBg 12V

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1 day 14 hours (Nov 28, 200909:54:04 PST)

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US Postal Service Priority Mail	5-6 business days	$6.00

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pyrojoseph ( 9714

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Item number:	220502596735
Item location:	Longwood, Fl., United States
Ships to:	N. and S. America, Europe, Australia, Japan
Payments:	PayPal See details
History:	1 sold


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25W Linear RF Amplifier Board 2.3-2.35 GHz 18dBg 12V

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Yes, you guessed it, this is a 75W linear amplifier board (REV.A) which is optimized for 2.30-2.35GHz but specified at 12.6 to 13.8V @ 12A for mobile operation with 25W output and 18dB gain. Psat is 30W. Required input power for 25W output is < 400MW. Since it is the exact amp as the 75W unit the same same setup instruction sheet settings apply. Once it is setup for 24v operation, just start using it at 12.5-13.8v. Only 130W power dissipation at full power output operating at 13v. This amplifier board does not require any tuning for use on the ham band! Required supply voltage is 24-26Vdc @ about 17A. Input drive required for 75W output power is 1.25W. Power gain is 18dB. Saturated power is 80W+. This is the final Rev. for this board design (Rev A)which has larger plated through holes and the holes have been sealed so the silicon grease does not come through the top side when bolting the board down to the heat-sink. The earlier rev. were all number revs with open vias. I sell the older "number rev boards" at a lower price on other auctions. The sweep photo shows one of these amps putting out 80W with about one watt input @ 2304GHz. The output (CH1) reference is set for 100W (50dBm)with a scale factor of 5dBm/division. Channel 2 is the input power with it's reference set for 10W (40dBm)with 5dBm/division. Sweep is from 2.2-2.6GHz with 50MHz/ division. Looking at the output plot you will see the level 1dB down from 50dBm or 80 Watts and the input 9.4dBm down 40 = 30.6dBm, slightly over one watt. Looking at 2450 MHz you can see the output is down 4dB form 50 - 46dBm = 40W. Note the preamp I am driving this PA with is not linear with frequency over this full range as indicated by channel 2. Circuit board is on an integral .062" solid copper heat spreader. Both the board upper surface and the heat spreader surface are heavy gold plated. Board needs to be mounted on heat-sink using Silicon grease and 7ea. 4-40 screws in existing holes. RF input and outputs are 50 ohm strip-line and will butt up to a standard SMA or N launch connector. Good quality SMA connectors are rated to 400W @ 2GHz and work very well for this amp. The XRF286 Lateral Mosfets used on this board can handle a 10:1 VSWR @ full power so isolators are not required. Board dimensions are 1.25" x 5.9". Weight is 6 ounces. DC connector pin-out. 1, Temperature output = 10MV/ degree F. 2, PTT = +12V To enable all 3 power FETs. 3, Drain current monitor for Q1. 1 volt out/amp of drain current. 4, Drain current monitor for Q2. 1 volt out/amp of drain current. 5, Ground. 6-10 are no connection. (I also have some of the complete 180W Spectrian amplifiers available and will start a fixed price auction for you by request. Please email me @ jruggieri3@cfl.rr.com or call (407) 767-5119 to request an auction if you don't see one currently running.)

Florida buyers must add 7% (or actual amount for your county) sales tax or mail me a signed photocopy of your Florida Resale Certificate with your payment! I do combine auction winnings when ever possible to save buyers money. I do ask that buyers help keep track of any auction shipments they want to combine and email me for a total when they are ready. I can be contacted at jruggieri3@cfl.rr.com . Fixed Priority S&H quoted prices are for 50 USA states. International Bidders pay actual S&H. Good luck bidding! KI4NPV

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Item location: Longwood, Fl., United States

Shipping to: N. and S. America, Europe, Australia, Japan

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Shipping and handling	Each additional item	To	Service	Estimated delivery*
US $6.00	US $2.00	United States	US Postal Service Priority Mail^®	5-6 business days after seller receives cleared payment

*The estimated delivery time is based on the seller's handling time, the shipping service selected, and when the seller receives cleared payment. Sellers are not responsible for shipping service transit times. Transit times may vary, particularly during peak periods.

Domestic handling time	Sales tax
Will usually ship within 3 business days of receiving cleared payment.	Seller charges sales tax for items shipped to: FL (7%).

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