Skip to content

EF Johnson ATLAS 4100 335-4121-001 P25 UHF R1 100W MultiMode Repeater Station

FREE Returns

This item is Haloid Guaranteed and includes a four-month warranty. Learn more about Haloid Guaranteed.


  • Manufacturer: EF Johnson
  • Model: ATLAS 4100
  • Part #:  335-4121-001 UHF 


Please note, we do not support modifying this ham frequencies. If it is modified, the item becomes unreturnable to Haloid.

These repeaters were recently sold to us by a defense contractor. They were barely used and are in excellent condition. They are fully-featured modern equipment; and include P25 and trunking capabilities. It was part of a system that included an EFJ Stargate, ATLAS 4100, and ATLAS 8100 equipment Their original cost was over $20,000 each repeater. We are selling them for a very low price because their split is limited to 370 to 400 MHz, which limits their potential application.

  • P25 UHF repeater
  • 100 watt repeater
  • 370-400 MHz
  • FCC Compliance: Parts 15 and 90
  • Weight: 20 lbs
  • Fits 19" rack shelf
  • Supports P25 Phase 1 mode of operation only

Estimated Value
Original price $14,999.00
Original price $14,999.00 - Original price $14,999.00
Original price $14,999.00
Current price $499.00
$499.00 - $499.00
Current price $499.00
You Save: $14,500.00(97%)

FREE Returns

No restocking fees for 30 days.

You can return this item in unused condition and we won’t charge a restocking fee. Learn more about our returns.

FREE shipping over $99

Manufacturer: EF Johnson

10 In Stock

Trust Guard Security Scanned Secure transaction

Your transaction is secure - guaranteed.

We guarantee that your transaction will be 100% safe. Our payment platform uses military-grade encryption and is approved by VISA, American Express, and others And we don’t share or sell your information to others. Learn more about our commitment to you.

Low Price Guarantee

If you purchase an item from Haloid, and find a competitor offering it online at a lower final price, then we will match the price, refund you the difference, AND beat the price by 10%!

Learn more about our Guarantee.