Looks like making C8 a little bigger (like 10uF) would help to reduce
some of the turn on pop that you see on the speakers when powering the
unit on. There is mention of this on page 17 under Selecting External
Components Bypass Capacitor Value. Wonder how difficult fitting
10uF in there will
Looks like making C8 a little bigger (like 10uF) would help to reduce
some of the turn on pop that you see on the speakers when powering the
unit on. There is mention of this on page 17 under Selecting External
Components Bypass Capacitor Value.
A couple thoughts...
First, that may, or may
Looks like making C8 a little bigger (like 10uF) would help to reduce
some of the turn on pop that you see on the speakers when powering the
unit on...
This capacitor value also affects the behavior of the speaker amplifier
when headphones are inserted/removed. The present value was arrived
Yea I remember having to add relays to our amps when I was working at
Phoenix Gold to kill the TINIEST of pops! The sales guys would put the
speaker up to their ear and if they heard ANYTHING it was too loud... I
found another really good way to pass is to accidentally have music
playing on the
Hrm. Oh well. I do think that the audio section would benefit from a
rejiggering of quite a few of those caps for more LF.
On the Rx side, there's not much left to consider after the DAC --at least
what I can see on the schematic. The circuit path is pretty darn simple.
However, the cap
Turn on Pop(WAS K3 Audio)
Hrm. Oh well. I do think that the audio section would benefit from a
rejiggering of quite a few of those caps for more LF.
On the Rx side, there's not much left to consider after the DAC --at least
what I can see on the schematic. The circuit path is pretty darn
Brett,
Is this an exchange/upgrade to the current DSP board?
Or did I miss something?
73'
Paul
PD0PSB
Yes actually I was just hearing about almost 30 discrete value changes on
the main DSP board... I've also been told that Elecraft can exchange your
older boards out... You pay 50 bucks
.
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of pd0psb
Sent: Tuesday, July 07, 2009 12:24 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Turn on Pop(WAS K3 Audio)
Brett,
Is this an exchange/upgrade
: [Elecraft] K3 Turn on Pop(WAS K3 Audio)
Well let's put it this way... I tried to order 100uF caps for my headphone
circuit and they told me that they can't send me those but they would allow
me to replace my mainDSP board (and exchange) for $50 USD. This was of
course providing that I
@mailman.qth.net
Subject: RE: [Elecraft] K3 Turn on Pop(WAS K3 Audio)
Well let's put it this way... I tried to order 100uF caps for my headphone
circuit and they told me that they can't send me those but they would
allow
me to replace my mainDSP board (and exchange) for $50 USD. This was of
course
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Brett Howard
Sent: Tuesday, July 07, 2009 4:02 PM
To: 'Brett Howard'; 'pd0psb'; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Turn on Pop(WAS K3 Audio)
I just took a closer look at the email that I received and it said if I was
interested to call
Sorry if I missed the context of the original discussion, but I came across
this email as my K3 also exhibits a loud pop noise when turning on...
The K3 audio amplifier has a characteristic that results in a pop when
power is cycled. This is normal; it has been present from the first
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Lyle Johnson
Sent: Tuesday, July 07, 2009 8:36 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 Turn on Pop(WAS K3 Audio)
Sorry if I missed the context of the original discussion, but I came
across
this email as my K3 also exhibits
I think pop is a very inaccurate description of the sound, at least in my
stock K3. Here's it's more of a quiet 'bump-bump' sound when the power is
cycled, even in a very quiet room.
It's very low frequency, so perhaps those K3's whose audio has been enhanced
to emphasize the very low
Maybe that's why the old AM radios had the power switch linked to the
volume control :)
Bob, N7XY
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