[Elecraft] Attenuator audio "pop" in K1

Wed Apr 24 10:11:01 2002

Ken,
I installed the inductor in my K1 last night -- but only after careful 
listening for the Attenuator "pop".  Prior to making the modification, the 
pop was particularly evident in a pair of light-weight, hook over the 
ear/stick in - ear type Sony headphones, and while listening to strong 
signals -- just where one might turn on the Attenuator.  It wasn't 
particularly objectionable, but there none the less.

Installation of the inductor smooooothed out the pop subtly.  The volume 
transitions from soft to loud, but I have the sense the transition is more 
of a curve and not a spike.

I would recommend this quick and simple modification to anyone who is 
experiencing and would like to minimize this anomaly.

Thanks for your help!

73,
Steve
aa8af

[email protected]
04/23/2002 09:27 PM

        To:     [email protected]
        cc: 
        Subject:        Re: [Elecraft] Attenuator audio "pop" in K1

Steve,
Yes,   you can identify Relay K1 from the top if you have not
mounted your speaker.   It is almost in the middle of the PC board
next to R16 and R18 and C31.
Flip it over on the bottom and take out the screws holding the bottom
cover.
Identify Relay K1 from the bottom side.
>From the top left count down to the number 3 pin.  Across from 3 is 8
and the
10 uH will fit between the pins by cutting the leads short and soldering
pins 3 and
8 with a small amount of solder.  Check for shorts...
Reattach the bottom cover and test it.

Ken Brown-N4SO
Mobile, AL  EM50tk
Elecraft K-1
4 ele. monoband yagi
[email protected]