$11.0 Buy It Now or Best Offer
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Seller Store scs-ct
(2031) 100.0%,

Location: New Hartford, Connecticut
Ships to: US,
Item: 153975114116

All returns accepted:ReturnsNotAccepted
Return policy details:
Compatible Brand:Universal
Unbranded/Generic:Unbranded/Generic
Type:Antenna Switch
Does Not Apply:Does Not Apply
Frequency Band(s):HF
MPN:Does Not Apply
Compatible Product:Base Station Radio

Item Description:You are bidding on one (1) bare PCB for an antenna T/R switch. The board can be configured for 12VAC, 24VAC, or DC operation by changing relays and selecting an appropriate MOV. The pictures show the front and back of the bare board and also show an assembled board that is not included in the auction. The assembled board picture shows the swage standoffs soldered in place.Note: The holes looking plugged on the bare board picture is just an illusion caused by the color of the background behind the board. The boards are double sided plated through PCBs with and silkscreen and solder mask for easy assembly. Board finish is Tin/Lead HSAL. The board size is 2.75″ by 3.15″. This board is able to use either swaged standoffs or male-female threaded standoffs. This board will work with SO-239 connectors and with type N connectors. The connectors are arranged on the board with the common connector offset from the antenna connectors for ease attaching the cables. This also keeps the traces to the relays short as they are mounted between the connectors. If square flange SO239 or type N connectors are used they should be mounted to the board using 1/4 inch long 4-40 threaded male-female standoffs (12 required) or for best results, Keystone 2261-2 swaged standoffs. Note, the swaged standoffs can be soldered into the holes in the board. When using the male-female standoffs, mount the male side of the standoff to the board using nuts. The connectors can then be temporarily attached and soldered. This will allow use of the ground plane on the boards and make for easy attachment to an enclosure. When using the standoffs, the boards may then be mounted in either plastic or metal enclosures. Use the bare board as a hole template for locating the centers of the SO239 connectors and the mounting holes. If rear mount SO239 connectors are used (no flange) they must be mounted on metal to provide the ground connection between the SO239 connectors. This may also be done with the flanged SO239 connectors without the standoffs. The board is then held in place by the soldered connector center terminals. In either case, a ground wire (braid) must be run from the metal enclosure to one of the ground pads on the PCB for the board’s ground plane. The relays used are DPDT 400V 8A. The antenna T/R relay has both sets of contacts wired in parallel for minimum resistance. The auxiliary relay switches with the T/R relay and grounds the receiver input when the transmitter is connected to the antenna. The second set of contacts on the auxiliary relay are available on a 4 pin connector. Do not use this board with a 115VAC control and relay. The relay control lines are connected through a 3 pin MOLEX connector for easy connection and removal of the wires. All of the parts for the printed circuit board except for the SO239 connectors are available at Digi Key or Mouser for under $10 not including shipping. The SO239 connectors are readily available on EBAY at prices that are better than from the distributors. Mouser and DigiKey have an aluminum box for $10 that will fit the board, Hammond 1590Y. As with anything connected to an antenna, all of the metal parts should be well grounded. This unit does not provide protection from lightning strikes, no system with relays can do that. The antenna coax should be disconnected when not in use. PayPal Confirmed Address: PayPal address must be confirmed and must be the same as the shipping address. Returns: All items are sold as-is unless otherwise stated. Returns are not accepted unless item is grossly misrepresented. Please notify me of any issue within 30 days of receipt of the item. Feedback: Feedback is important to me, please email or contact me with any concerns, issues or problems before leaving feedback and give me the opportunity to work things out if needed. I always leave positive feedback after receiving feedback from the buyer, that way I know the buyer is happy and the transaction is complete. Shipping : Shipping is to USA only.

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