[Elecraft] K2 SSB Performance Improvement

[Brian Denley]

Phil:
Yeah my audio reports are fine with the MH2 as well.  I'm not looking to widen the K2 bandwidth.
Thanks

Brian 
KB1VBF
Sent from my iPad

> On Feb 10, 2015, at 12:57 AM, Phil Wheeler <w7ox at socal.rr.com> wrote:
> 
> Good question. I've never had any issues with my audio reports, using the Elecraft MH2 mic; in fact all audio reports have been positive. It sounds like these mods are for the Proset K2 Heil mic/headset (I'm not sure which Heil mic element is in this model).
> 
> There were some K2 mods related to the SSB bandwidth, but these were not so much "audio", if I understand the question -- though they would impact the audio.
> 
> 73, Phil W7OX
> 
>> On 2/9/15 8:33 PM, Brian Denley wrote:
>> George et al:
>> Did Elecraft ever adopt these (or any other) K2 SSB audio changes?
>> 
>> Brian
>> KB1VBF
>> Sent from my iPad
>> 
>>> On Feb 9, 2015, at 10:32 PM, George Winship, NC5G <gwwa5uih at hotmail.com> wrote:
>>> 
>>> Thanks for posting this, Ray. I also was getting those kind of reports on my
>>> K2. I was able to get the 1uF electrolytics but was unable to find the
>>> 0.1uF. G3RXQ was quick to respond to my email and said that a 0.1uF
>>> monolithic could be used instead. The results are great, as confirmed by
>>> hams I talk to on a regular basis for many years.
>>> 
>>> Now, if I could only get the circuit between my ears to work so that I could
>>> tell that I had not put my K2 in split mode while trying to work K1N a
>>> little while ago, all would be good. The "frequency police" were not bashful
>>> in letting me know the error of my ways.
>>> 
>>> Thanks again.
>>> 
>>> 73,
>>> George NC5G
>>> 
>>> 
>>>> Other K2 owners may be interested in this.
>>>> After getting many reports of poor quality transmit audio with my K2 (using
>>> the Proset K2 Heil boom >microphone and headset), I carried out the
>>> modifications described by G3RXQ which increase the lower cut >off frequency
>>> of the microphone circuit on the KSB2.  This involves changing C34 from
>>> 2.2uF to 1uF, C31 >from 2.2uF to 1uF and C20 from 0.33uF to 0.1uF.
> 
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