[Elecraft] Transmit EQ for Heil PR40 and 781 Mics

[Tom Coletti]

Thanks Bob, your profiles give me a starting point. 

Tom C
NA7AA

> On Dec 2, 2025, at 10:02 AM, Elecraft-request at mailman.qth.net wrote:
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> Today's Topics:
> 
>   1. TX Equalizer Profiles (Bob McGraw)
>   2. K3/P3 For Sale (Allen Bush)
>   3. K3/P3 For Sale Updated (Allen Bush)
> 
> 
> ----------------------------------------------------------------------
> 
> Message: 1
> Date: Mon, 1 Dec 2025 12:26:59 -0600
> From: Bob McGraw <rmcgraw at benlomand.net>
> To: elecraft at mailman.qth.net
> Subject: [Elecraft] TX Equalizer Profiles
> Message-ID: <3f9d0470-3a68-48b6-b3a1-4f40b16adfde at benlomand.net>
> Content-Type: text/plain; charset=UTF-8; format=flowed
> 
> I've used both with my K3S.? I didn't care for the sound of either one
> for SSB.? For AM, the 781 was better.? ?The mike technique, i.e. mike to
> mouth distance, is critical as proximity effects are very pronounced.?
> Likewise the mike on axis position is critical.? ?Variations in these
> two parameters will greatly change the transmitted sound.? ? The
> transmit bandwidth has TX ESSB set to OFF.
> 
> The profile I used for both mikes:
> 
> 50 Hz? ?-16
> 
> 100 Hz? -16
> 
> 200 Hz? -16
> 
> 400 Hz? -12
> 
> 800 Hz? 0
> 
> 1.6 kHz? ?0
> 
> 2.4 kHz? +3
> 
> 3.2 kHz? +6
> 
> The bottom line, I sold both mikes in favor of a different microphone,
> which I much prefer, being a Shure SM-58.? My evaluation is based solely
> on using a remote SDR, recording my test transmission, and then
> listening back to my recording.? I make adjustments from that
> evaluation.? I always get complements on my "great sounding audio".?
> I'll stand by that any day.? ?And I don't have the pipes of Don Pardo
> (SNL), Richard (Dick) Dudley (Voice of NBC) , or Jack Parnell.
> 
> 73
> 
> Bob, K4TAX
> 
> 
> 
>> On 12/1/2025 11:00 AM, elecraft-request at mailman.qth.net wrote:
>> Message: 1
>> Date: Sun, 30 Nov 2025 10:43:25 -0700
>> From: Tom Coletti<tcoletti at me.com>
>> To:elecraft at mailman.qth.net
>> Subject: [Elecraft] TX Equalizer Profiles
>> Message-ID:<BF542643-5909-4785-91B5-85B810889890 at me.com>
>> Content-Type: text/plain; charset=utf-8
>> 
>> Anyone have TX profiles for Heil PR40 or 781 mic?s?
>> 
>> Tom C
>> NA7AA
> --
> Common sense is a flower that doesn't grow in everyone's garden.
> 
> 
> ------------------------------
> 
> Message: 2
> Date: Tue, 2 Dec 2025 00:48:38 +0000 (UTC)
> From: Allen Bush <adb66856 at yahoo.com>
> To: "Elecraft at mailman.qth.net" <Elecraft at mailman.qth.net>
> Subject: [Elecraft] K3/P3 For Sale
> Message-ID: <1143939300.149205.1764636518303 at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
> 
> I have a very nice K3 setup for sale:
> K3/100 S/N 6025 with all the available modifications performed and documented and latest firmware installed.? Includes:2.8 filter?KIO3B USB and internal sound card interfaceKDVR3 Digital voice recorderKAT3 antenna tunerKPA3 100 watt PAUpgraded VFO grip
> P3 S/N 3648 with no options.
> Both units have no scratches on sides and only a slight scuffing on top panel of K3? (very hard to see in photos)
> All interconnect cables and binder full of documentation included
> Asking $2300 shipped to US destinations.
> Feel free to inquire and ask for photos, etc.? Thanks for looking.
> Allen Bush, W0OUU
> 
> 
> 
> ------------------------------
> 
> Message: 3
> Date: Tue, 2 Dec 2025 00:58:21 +0000 (UTC)
> From: Allen Bush <adb66856 at yahoo.com>
> To: "elecraft at mailman.qth.net" <elecraft at mailman.qth.net>
> Subject: [Elecraft] K3/P3 For Sale Updated
> Message-ID: <625268562.145445.1764637101377 at mail.yahoo.com>
> Content-Type: text/plain; charset=UTF-8
> 
> Update.... unit also has KXV3B transverter interface
> 
> 
> I have a very nice K3 setup for sale:
> K3/100 S/N 6025 with all the available modifications performed and documented and latest firmware installed.? Includes:2.8 filter?KIO3B USB and internal sound card interfaceKDVR3 Digital voice recorderKAT3 antenna tunerKPA3 100 watt PAUpgraded VFO grip
> P3 S/N 3648 with no options.
> Both units have no scratches on sides and only a slight scuffing on top panel of K3? (very hard to see in photos)
> All interconnect cables and binder full of documentation included
> Asking $2300 shipped to US destinations.
> Feel free to inquire and ask for photos, etc.? Thanks for looking.
> Allen Bush, W0OUU
> 
> 
> 
> ------------------------------
> 
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> End of Elecraft Digest, Vol 260, Issue 2
> ****************************************