N4TZE ITEMS FOR SALE
If you are interested in these items, please send me an email at N4TZE@comcast.net
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UPDATED 1-28-12
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MOTOROLA
MICOR UHF 75 WATT MOBILE
55 units for sale comes with channel elements and vibrasenders and vibrasounders.
These are T54RTA3800BA UHF 75 WATT Motorola Micor mobile units only.This units come with a tranmit and receive channel element.
Also here is a list of additional channel elements...13 of the KXN1024A's (silver) and 8 KXN1024A's (blue).
Vibrasenders..1 of the 179.9 Hz, 6 of the 107.2 Hz, 3 of the 118.8 Hz, 7 of the 131.8 Hz, 38 of the 146.2 Hz tone modules.
Vibrasounders..2 of the 107.2 Hz, and 35 of the 146.2 Hz tone modules.
At least 1 manual.
This will be a pickup or meet within a resonable distance to Lynchburg, Virginia.
If the buyer wants the units shipped to them, then the buyer will pay and arrange everything to pack and ship the units.
These units were working when removed from service.
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Hughey and Phillips 300mm Beacon
$100.00
Local Pickup Only in Lynchburg, Virginia
Model number KG-114. Serial number 3888.
Uses two 600 watt bulbs in working order. Has some small chips in the hinge side of the beacon which you can see in the photos below, which happened when the tower crew removed the beacon as I was there when it was removed. The lenses have no cracks. The bottom red lens has a piece missing where someone dropped a replacement bulb and knocked out a small piece out as you can see in the picture. Both bulb sockets are clean and the bulbs can easily be removed. I replaced the wiring inside and added two 120 volt AC 3 prong plugs on about 4 feet of wire. I have cleaned the beacon and repainted the outside aluminum frame. As you can see from the photo below, this beacon is fully functional. You can remove the inner red lenses (upper and lower globes) and then the beacon will emit the white light from the bayonet base style bulbs. This beacom measures 35 inches high and is 14 inches in diameter.
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Optical Amplifier Buffer-Key
$35.00 (shipping included)
This is an electronic optical amplifier buffer-key interface box. This device operates on a 9 volt battery and provides 100 percent electrical isolation between your expensive amateur transceiver and any linear amplifier. This Optical Amplifier Buffer-Key is purely electronic and there is NO mechanical moving parts and can key any linear amplifier relay circuit up to 160 volts AC or DC at 15 amps. This O.A.B.K. has a front panel 3 position switch which provides a center OFF position and an AMP ON A left and an AMP ON B right position to accommodate the correct polarity of either the AC or DC voltage on your linear amplifier. With the switch in the OFF position, disables your linear amp from keying allowing you to operate your transceiver as “stand-alone.” This O.A.B.K. is perfect for the FLEX or other software defined radios as it keeps the computer and Flex radio totally isolated from linear amplifiers. This keeps the electrical/mechanical keying noise from going back into your radio, and in the event your amplifier detonates, your transceiver will not be exposed to high voltages to ground. The power consumption from the 9 volt battery only occurs when you key your radio. There is NO idle current consumption from the battery and will usually last (depending on much you key your amplifier) more than a year. The O.A.B.K. comes with an RCA plug for the transceiver, and two bare wires for the connector for the amplifier, and each cable is about 4 feet long. If you want a male RCA connector on the AMP cable, let me know and I will put one on. Instructions are included and you will need a 9 volt battery. WARNING. .. DO NOT use an AC adaptor (wall-wart) for 9 volts DC as this will defeat the 100 percent optical isolation properties. $35.00 this includes shipping.
COMPARED TO THE AMERITRON DEVICE
I have looked at the schematic of the Ameritron device and compared it to my device, AFTER I developed it.
#1. The biggest difference is that the Ameritron device has all the METALLIC grounds tied together. That means that the chassis of the linear amp, the chassis of the transceiver and the AC 120 volt outlet ground are all tied together. This has many disadvantages. If the linear amp fails and shorts out. that voltage is sent to ground, exposing your very expensive transceiver to that voltage surge.
#2. My O.A.B.K.. also does not allow any mechanical or RFI noise back into the control board of your transceiver.
#3. My device handles more relay current than the Ameritron device.
#4. The Ameritron device uses a "merry-go-round" current keying design. Meaning that the two Ameritron power keying transistors allows the keying current to "find-is-way" to your linear amp, meaning that a voltage spike could find its way back into your transceiver. The O.A.B.K. has only one power transistor and will not allow the voltage spike back into your transceiver and the O.A.B.K. uses a front panel, 3-position switch to accommodate either AC/DC or +/- current direction. The switch is LEFT-MIDDLE-RIGHT, or as it is on the O.A.B.K. ......AMP ON A / OFF /AMP ON B.
#5. The O.A. B.K. is in a plastic box and the Ameritron is in a metallic box. Why? Ground isolation between the transceiver and the linear amplifier. The other reason is that where you might place the O.A.B.K. in your shack. You can place my device on anything and it will not contribute to ground loops keeping down the RFI that is present in your shack.
#6. If you take an ohm meter and try to find continuity between the O.A.B.K. you will not find any. Why do you have to use a 9 volt battery with my device? Because if you use an AC adapter to power the O.A.B.K. you will defeat the 100 percent optical isolation between your transceiver and linear amplifier.
The cost is $35.00 and that includes shipping. No personal checks. I accept Paypal, Postal Money Orders, or other certified funds. My address is good on QRZ.
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