HF WIRE ANTENNAS MADE IN GERMANY
HF WIRE ANTENNASMADE  IN  GERMANY

NEWS FLASH  New QRP RIG:

"ALT-512"

Photo: LZ1JY

AVAILABLE NOW!

SKY-SDR

Photo:  DJ0IP

(No longer available)

RMU Selection

80m Resonance of the 807-xx is determined by the choice of RMU . . . NOT by adjusting the overall length of the antenna.  

 

Changes to the overall length might improve 80m, but it will affect the resonanceon the higher (harmonic) bands.

 

DO NOT CHANGE THE LENGTH OF THE ANTENNA!

 

Aerial-51 offers a choice of 4 different RMU's

for setting the resonance of the 807-xx antenna;

RMU- CW | RMU-R1 | RMU-R2 | RMU-75

The RMU itself is very small and light as a feather, yet handles 1 kW of SSB/CW power.

It was co-developed be DJ0IP and DF4SA.

(The photo is intentionally fuzzy ... to confuse the copy cats.)

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Spiderbeam now has RMU circuit boards in stock

for ALL FOUR versions of the RMU.

 

AVAILABILITY:  Beginning mid July 2019

 

Here are the tentative Resonant Frequencies*:

  • Region 1 (RMU-R1):     3.670 MHz
  • Region 2 (RMU-R2):     3.800 MHz
  • 75m Bnd (RMU-75):     3.880 MHz
  • CW/Digi (RMU-CW):     3.570 MHz

 

* These are the frequencies where minimum SWR occurs.

The actual resonant frequency is slightly removed from the frequencies shown here.

Resonance can vary slightly from one QTH to the next. 

 

(Updated: 10-JUN-2019)


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