How to Identify which radiosport Mic you have.

• Close-Talk, Noise-Canceling Communications Mics

Close-Talk, Noise-Canceling Mics are supplied as standard for all radiosport headsets. These offer true communications frequency response with superb voice articulation making them excellent for DX, Contesting as well as casual operating, without picking up and transmittimng room noises and even conversations around you while operating.

All Close-Talk, Noise-Cancelling Communications Mics are used with the Mic set directly in front and within 1/8" of your lips. If the Mic is moved away you will beging loosing low frequency response as those frequencies beging being treated as outside noise and are cancelled. So for full output anf full frequency response care must be taken in proper use of the Mic.

Over the years we have offered both Dynamic and Electret- Condenser Mics based on the type of Mic originally supplied with the radio by the manufacture.

On all RS60CF headsets produced up until 2020, these Mics were of the MIL M101 package style allowing for quick interchange. Most modern HF radios of the era (1990's and early 2000's) had no capability for adjusting transmit EQ. As a result we offered at least a couple of different Dynamic Mics and a couple of different Electret-Condenser Mics to suit the operating style of the user. Restricted response for DX and Contesting and a Broader response Mic for casual Rag-Chew.

In general these Mics could be best identified between Dynamic and Electret-Condenser by the polarity markings on the Electret-Condenser Mics.

For our original RS60CF Headset our most popular Dynamic Mics were our 200 Ohm M207 (300-8000Hz response) and later our 600 Ohm M208 (100-6000Hz response), plus our M350 Electret-Condenser Mic (300-8000Hz response) that was far and away our most popular Mic of all.

If you have a question about which Mic you have installed on one of our earlier RS60CF Headsets, just give us a ring and we can look it up from your original invoice. If you purchased through one of our Dealers or Distributors, we can still help you identify your original Mic.

Initially we expected that the headset and Mic would be chosen for their primary operating station. We quickly learned however that more than 60% of our users wanted to use their radiosport headset on 2, 3 or more radios in their shack. This was certainly my case as well, so we set about to make it possible to use our Electret-Condenser Mic on any modern HF Amateur Radio we had in the shack.

Note: ALL VHF/UHF Mobile radios as well as all VHF/UHF Handheld radios from all manufacturers use Electret-Condenser Mics.

Beginning with October 2014 production of our Headset-To- Radio cables for poular HF desktop radios we offered support for using the same RS60CF headset equipped with an Electret- Condenser Mic on all of the radios in your shack.

We quickly followed this with a new Headset-To-Radio cable for the popular small Mobile/Portable HF/VHF/UHF radios and additionally added support for adding an external PTT Switch for these radios as external PTT interfaces and indeed accessory interfaces shrank or disappeared from many of these radios, replaced with headsinks and cooling fans occupying the rear panel space.

In 2020 we introduced our 10th Anniversary Edition radiosport hesdsets. These headsets were revised to address the dramatic changes in the capabilities of our most modern HF radios. These headsets offered two significant changes from our original RS60CF headsets while retaining the Durability and Comfort features of the most popular headsets for Amateur Radio.

These changes were two fold:

First we redesigned the headphone drivers (speakers) to extend the low frequency response from 300Hz down to 70Hz to support the high quality ESSB Audio coming from these new rigs, while maintaining the crtical high frequency roll-off of any audio above 6000Hz to eliminate any radio's Audio Amplifier Generated Noise from reaching your ears and covering up weak signals. Not to mention with these high frequencies, even those we can't hear, from bombarding our ear drums and the significant listening fatigue this causes. This change applies to both our RS20S-10A and RS60CF-10A Headsets.

Second we replaced the interchangeable MIL Mic Mount of our original RS60CF headset with a new fixed Mic Boom with a Broad Response (M20) Electret-Condenser Mic, also with response from 70-6000Hz, for all of our modern HF radios that now support TX EQ and for the Software Defined Radios, the additional ability to vary TX bandwidth supporting high quality ESSB for transmit, while also allowing the operator to narrow and tailor the transmit bandwidth and Audio spectrum with TX EQ for superb DX and Contest operating.

Now one headset along with our Headset-To-Radio cables available since 2014, may be used across any radio in your shack, all while supporting whatever operating style you prefer.

Mohave County AZ:

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