[Elecraft] K1 AGC mod

[William Carpenter]

Hi Don,

Thanks for your response.  I'm sure it's not the "thump" but rather a spike
in the audio derived AGC before it reduces the the level.  I'll try
decreasing C31 first

On Sun, Feb 1, 2015 at 3:51 PM, Don Wilhelm <w3fpr at embarqmail.com> wrote:

> Bill,
>
> Decreasing C31 may decrease the attack time, and decreasing C67 will
> reduce the hang time.
> If you are having trouble with the initial 'spike', then I would suggest
> reducing C31 first.
> You can experiment with the values.
>
> Also take a look at Wayne's comments at http://www.qsl.net/ve3mcf/
> elecraft_reflect/K1_AGC_Notes.txt and be sure what you are hearing is not
> the audio 'thump'.
>
> 73,
> Don W3FPR
>
>
> On 2/1/2015 10:37 AM, NZ0T wrote:
>
>> I just built K1 SN 3353 and it's a neat little rig.  I usually wear
>> headphone
>> so now that I've experienced the AGC lag I would like to do something
>> about
>> it.  I know it's audio derived so it will never sound like a  K2 or K3 but
>> if I could reduce the loud spike at the start of a received transmission
>> it
>> would help.  From perusing the net it looks to me like the most common mod
>> involves replacing C31 on the RF board with a 1uf and C67 on the same
>> board
>> with a .22uf.  Is this the best mod or are there others that I should look
>> at?
>>
>>
>>
>