In my experience, I have found that the Heil Pro Set introduces a
white noise type of low level hiss when operating CW with narrow filters in
line (use of the LP or NR DSP facilities reduces or deletes this situation).
Perhaps this additional internally generated noise is due to the wider audio
pass band of the Pro Set headset.
I currently use the Yaesu YH-55 headset which, because it is very
sensitive and requires little audio gain to produce adequate volume, does
not introduce any hiss when using CW filters. It's chief advantage to me is
that it appears to have a limited audio passband which peaks around 700-800
Hz, perfect for CW reception. Although not quite as comfortable as the Pro
Set, the YH-55 has been an excellent CW headset over the years.
Vince/K7NA
> From: "Dale L Martin" <kg5u@hal-pc.org>
To: <tentec@contesting.com>
> Date: Sun, 19 Nov 2000 10:04:49 -0600
> To: <tentec@contesting.com>
> Subject: RE: [TenTec] early morning questions
>
>
>
>> To follow up on my previous email to you Clark, I did some critical
>> listening and I think it is hard to beat the Heil Pro headset.
>> Fidelity is
>> almost on par with top shelf Sennheisers, long-term comfort level is
>> excellent, and the HC5 cartridge does a good job. Well worth the
>> money and
>> Bob Heil will get right on the phone with you to answer questions a la
>> Ten-Tec.
>>
>>
> As I commented on in a previous note, I use stereo headphones with little
> problem.
>
> However... I would love to have a pair of headphone that are audio-lly
> optimized for copying CW. That is, have the roll off below and above what
> may be an optimum CW range, say, 300Hz-1000Hz or something like that. It
> can be done with filters (I used to use SuperSCAF--which was it says it is:
> Super), but can it be done physically in the headphone? Our telephones are
> optimized for 300-3000Hz. Maybe our headphones can be similarly optimized.
>
> Besides, high fidelity and SSB are somewhat opposites, aren't they? I mean,
> SSB is ratty audio to begin with. No amount of hi-fi headphone quality will
> improve it. CW is CW.
>
>
> 73,
> dale, kg5u
>
>
>
>
>
>
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>
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