ent call.
Ron AC7AC
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of [EMAIL PROTECTED]
Sent: Monday, March 31, 2008 9:16 PM
To: [EMAIL PROTECTED]; elecraft@mailman.qth.net
Subject: Re: [Elecraft] CW rise time mod
It's not that 3ms is a lot of time i
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Hash: SHA1
I agree John.
The list moderators have asked, on several occasions, for people to put
the model of elecraft product in the subject line. It was suggested that
doing this would allow people to use the filtering capabilities of their
mail clients to so
Hi everyone:
I have Thunderbird check for the magic characters "K3" in the subject.
When they are found, those emails are put into a separate folder. Not
owning a K3, that makes it easier for me to quickly scan through topics
that probably aren't of interest to me. Some folks don't bother to
al Message -
From: "Lyle Johnson" <[EMAIL PROTECTED]>
To: "Elecraft Reflector"
Sent: Saturday, March 29, 2008 5:21 PM
Subject: Re: [Elecraft] CW rise time mod
>> Or do Rev A RF boards have a lower value for C222 than that shown on the
>> schemati
D]
[mailto:[EMAIL PROTECTED] On Behalf Of John Reiser
Sent: Saturday, March 29, 2008 5:33 PM
To: Lyle Johnson; Elecraft Reflector
Subject: Re: [Elecraft] CW rise time mod
People,
8 ms.- 5 ms.= 3 ms., does it matter in any practical sense? I would really
like to know who cares, and why? Can anyon
AIL PROTECTED]>
To: "Elecraft Reflector"
Sent: Saturday, March 29, 2008 5:21 PM
Subject: Re: [Elecraft] CW rise time mod
Or do Rev A RF boards have a lower value for C222 than that shown on the
schematic?
Early production K3 RF boards have a 1 uF capacitor instead of a 0.1 uF
c
David Pratt wrote:
Elecraft says.
"Some owners prefer a faster CW keying waveform rise time. The rise time
can be reduced from about 8 milliseconds to 5 milliseconds without
affecting the fall time by replacing capacitor C222 on the K3 main RF
board with a 0.1 uF capacitor. This change wil
Measured C222 in my K3 s/n 285 a while back and it is .1uf.
73, Joe W2KJ
QRP, therefore I am
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Oops, make that originally a 1 uFD cap at C222. Now the recommended value is
0.1 uFd
Ron
-Original Message-
From: Ron D'Eau Claire [mailto:[EMAIL PROTECTED]
Sent: Saturday, March 29, 2008 2:26 PM
To: 'David Pratt'; 'Elecraft Reflector'
Subject: RE: [Elecra
Hi, David:
The original value for C222 was 0.01 uF. Wayne asked that it be changed to
0.1 uFd.
I wasn't privy to the source of the comment that the rise time might be
further shortened in firmware. If Wayne plans to control the keying in
firmware, it's probably important that all the hardware be
I guess I didn't say... my K3 is #202
73,
Ken KIU
Don Ehrlich wrote:
That was me .. My actual measurement was 0.985 microfarad when I
checked the RF board in S/N 195 I rounded it up to 1 microfarad in
my earlier report.
Don K7FJ
Someone else here mentioned that C222 was 1 uF, but I don
Or do Rev A RF boards have a lower value for C222 than that shown on the
schematic?
Early production K3 RF boards have a 1 uF capacitor instead of a 0.1 uF
capacitor installed at C222. Yes, the published schematics show a 0.1
uF capacitor. The effect of the larger capacitor is to increase th
That was me .. My actual measurement was 0.985 microfarad when I checked the
RF board in S/N 195 I rounded it up to 1 microfarad in my earlier
report.
Don K7FJ
Someone else here mentioned that C222 was 1 uF, but I don't remember who
it was.
73,
Ken K3IU
___
In a recent message, Ken Wagner <[EMAIL PROTECTED]> writes
I measured C222 *in place* with my aade cap checker and it measured ~1
uF(actually 0.965 uF)... not the 0.1 in the schematic. I'm guessing
that the schematic available for download is not current with
production. Someone else here menti
Hi David:
I measured C222 *in place* with my aade cap checker and it measured ~1
uF(actually 0.965 uF)... not the 0.1 in the schematic. I'm guessing that
the schematic available for download is not current with production.
Someone else here mentioned that C222 was 1 uF, but I don't remember
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