Very interesting discussion. I'm not a SSB op but I do listen some and
occasionally chat with friends. On my P3 with a fairly narrow span, I
notice that a lot of signals [like most] seem to have most of their
power concentrated close to the suppressed carrier frequency. From the
discussion here, I get the impression that the microphone is the primary
driver of the transmit audio spectrum. I use a K3 with a Yamaha CM500
and have the TX EQ set to K9YC specs and my spectrum is fairly flat,
maybe a little weakish in the lows. I don't know if equalizers are
common in contemporary radios but it seems that one can correct a mic
deficiency with one?
73,
Fred ["Skip"] K6DGW
Sparks NV DM09dn
Washoe County
Joe Subich, W4TV <mailto:[email protected]>
Tuesday, June 24, 2025 6:04 PM
On 2025-06-24 5:44 PM, bill kipping via Elecraft wrote:
> but the best is the choice is the Shure 450, dual impedance with a
> wider frequency response
No, the best choice is the 444D. You *DON'T WANT* a "wide frequency
response" mic for communications. The 444/444D response is tailored
specifically for SSB communications and paging purposes - i.e., maximum
voice "punch".
73,
... Joe, W4TV
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bill kipping via Elecraft <mailto:[email protected]>
Tuesday, June 24, 2025 2:44 PM
The 444 is HiZ, the 444D is dual Z, high and low. The mobile versions
404C is HiZ the 404B is LowZ, but the best is the choice is the Shure
450, dual impedance with a wider frequency response
BillKE7KK
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Jim Brown <mailto:[email protected]>
Tuesday, June 24, 2025 11:33 AM
Lo-Z.
73, Jim K9YC
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Steve Lawrence <mailto:[email protected]>
Tuesday, June 24, 2025 8:36 AM
There appears to be a LowZ and HiZ variations of the Shure 444
available in addition to the handheld version 404 and the 414. Which
is appropriate for the K3 (KX3, KX2)?
Otherwise, I like the idea of a “communications specific” microphone
tailored for a good voice intelligibility on SSB and new ones appear
to be rare, specifically with published response curves. So many are
mystery microphones with unstated acoustic/electric details.
Steve
AA8AF
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Ken WA8JXM <mailto:[email protected]>
Monday, June 23, 2025 8:58 PM
Yes the Shure 444 is a good mic, mine dates back to when I bought my Drake
T4x almost 60 years ago.
Ken WA8JXM
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