Various accessories

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WiMo QRM Eliminator

Problems with local QRM on short wave? Very often the answer to this question is a clear 'YES'. Those living in rural areas know how 'clean' the frequencies can be - except maybe the near-by high-power land line makes noise...
However, most interferences are caused by local electronic sources, like TV's, computer, bad connections.
With this new accessory you can get rid of local interference up to an S9 level almost entirely; the result is a clean QRG! You don't have to know what kind of a interference is present neither would you have to have knowledge about the location of the interference. It doesn't matter if the interference originates from the own Packet station of from a welder 100 meters away.

The QRM Eliminator is inserted into the feedline from the trx to the antenna without any additional modifications required to the radio. The box has a built-in PTT control which enables the Eliminator to stay connected during transmit. An additional auxiliary receiving antenna is required, though, like a 2m antenna or simply a couple of meters wire in the shack.
The unwanted signal is received with both antennas resulting in different phases. The QRM Eliminator now allows to adjust the phase angle as well as amplification in a way to cancel out the unwanted signal before it reaches the receiver front end!
It's based on a totally innovative concept and cannot be compared to the normal 'noise blanker' performance.

  • Additional data:
  • Dimensions: 110 x 46 x 69 mm (W x H x D)
  • ##anschluesse: 3 x PL female connectors for radio, main and auxiliary antenna, 1 x Cinch jack for PTT, 1x barrel connector for DC
  • Power requirements: 12 V, 150 mA
  • Metal enclosure
  • LED status display
Order No.
26000 QRM Eliminator 159.00 € Add to shopping cart In stock, shipped in 1 to 2 days.
40075.15 Cable 2 x Cinch, 150cm 1.40 € Add to shopping cart In stock, shipped in 1 to 2 days.
SNG-1210 12V/1A Power supply 12.90 € Add to shopping cart In stock, shipped in 1 to 2 days.
Info freight charges
Download: Instruction Manual QRM-Eliminator (PDF, DE/EN, 35KB)
Download: Review from FUNKAMATEUR 1/15 (PDF, DE, 432KB)
Here is a nice video, demonstrating the efficiency of the WiMo QRM Eliminator. (Video by Youtube user 'FinRadar', many thanks.)

MFJ-434B Voice-Keyer

Let this microprocessor controlled MFJ Contest Voice Keyer call CQ, send your call and do contest exchanges for you in your own natural voice! Store frequently used phrases like "CQ Contest this is DA0HQ", "You're 59" . . . "QTH is Ilmenau" and more! Contest by pressing a few buttons and save your voice.

You can record and play back five natural sounding messages in a total of 75 seconds. EEPROM technology keeps messages stored for up to 100 years -- no battery backup needed.

You can repeat messages continuously and vary the repeat delay from 3 to 500 seconds. Makes a great voice beacon and calling CQ is so easy. A receive audio jack lets you record and play back off-the-air signals -- great help if you didn't get it right the first time! No more "Please repeat".

A playing message can be halted by pressing the Stop Button, your PTT mic button or by your VOX PTT line. A closure to ground via remote control or computer also halts messages.

Has jack for remote or computer control (using CT, NA, TR or other program and its interface). Lets you select, play and cancel messages.

The MFJ-434B is transparent to your microphone -- your mic's audio characteristics do not change when your MFJ-434 is installed. Dual controls make it easy to tailor audio level to match your voice.

All audio lines are RF filtered to eliminate RFI, audio feedback and distortion. An audio isolation transformer totally eliminates hum and distortion caused by ground loops.

It's easy to use -- just plug in your 8 pin microphone cable (FOster round or RJ45) and plug the MFJ-434B shielded cable into your transceiver's mic connector. Internal jumpers let you customize it to Kenwood, Icom, Yaesu, Alinco or Radio Shack rigs. Adaptor cables Forster and RJ-45 are included. Use your station or built-in microphone for recording.

Built-in speaker-amplifier lets you monitor stored messages. 3.5 mm speaker/headphone jack. SMT technology. Use 9 Volt battery, 9-15 VDC. Size 162x162x62mm.

Model MFJ-434 (no "B", discontinued) is suitable only for radios with 8 pin round mic connector (Foster connector). Current model MFJ-434B has connectors and cables for both 8 pin round and 8 pin RJ-45 mic connectors.

Order No.
MFJ-434B MFJ Voicekeyer, 8pin round, RJ-45 252.00 € Add to shopping cart In stock, shipped in 1 to 2 days.
SNG-1210 12V/1A Power supply 12.90 € Add to shopping cart In stock, shipped in 1 to 2 days.
Info freight charges