Dummy Load RF, Radio & Antenna testing 50 Ohm - General, Ham & CB Radio SO-239

Description

Coaxial construction 50 Ω Dummy Load with SO-239 UHF Socket
Useful for Amateur/Ham/CB radio use and RF experiments
Brief Description
This dry dummy load has been designed to provide constant 50 Ω impedance to a radio transmitter to allow off air tests and experiments.
The coaxial construction creates a load that presents a more stable resistance to the transmitter output over a wider range of
frequencies, testing has shown the following SWR measurements using a RigExpert AA-230 Zoom, +/-:
3.8 MHz  - 1.01:1
7 MHz     - 1.02:1
30 MHz   - 1.07:1
50 MHz   - 1.16:1
70 MHz   - 1.22:1
145 MHz - 1.60:1
Constructed from high quality PCB material and using 20 x 1 KΩ 3 Watt Metal Film or Carbon Film resistors (see photos)
the dummy load while air cooled is capable of absorbing RF energy of 40-50 Watts continuously for 1 minute, and up to 100 Watts for several seconds. The load can also be mounted in a can with oil for longer use at 100 watts. Mounting holes in the PCB can accommodate 4/40 bolts that will allow the load to be mounted on a can lid. Some details on how to do this are in the user guide (available on request prior to sale if needed).
Connection to the dummy load is via a high quality SO-239 UHF Connector mounted on the PCB. Overall dimensions are: 2.5" diameter, 3/4" thick (PCB sandwich, excludes SO-239)
Please also see the photos as these are part of the description
What's
included for Sale?
1. Fully assembled Load PCB as per above description and photos
2. Link to our web site for the user guide
Questions?
We always respond to product related questions, please ask before making your purchase if any details are unclear or need clarification.
Remember the photos are also part of the sale description.
Other Details
1. Shipping is free within the USA. We ship in  one business day after receipt of full payment.
2. Please make sure your ship to address is correct with ebay, this reduces shipping delays and issues.
3. Returns - start a return by accessing ebay customer support on your ebay account page, we generally offer 60 day return windows.
4. We provide follow up technical support after sale if needed - we are only an email away.
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This listing is for one (1) Vintage Motorola MX360 Two Way Radio. We have a quantity available and the buyer will receive one unit selected at random.
In fair cosmetic condition, with scuffs, scratches, marks, brittle plastic etc. Missing the battery and antenna and, as government surplus, may have had other parts removed. Some have the cover for the accessory port, some do not. The pictures show a representative sample but not necessarily the radio that you will receive. Untested and sold as-is, as a collectible and not for use.
The final picture shows the frequencies listed on the back of three radios that we picked at random from the lot, but we do not guarantee that all the radios have those frequencies listed or that one with those frequencies listed is the one that you will receive.
These are the only ones on the market - don't let them get away!
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