Message-
From: James Sarte [mailto:k2qi@gmail.com]
Sent: Wednesday, January 06, 2010 5:59 PM
To: d...@w3fpr.com
Cc: 'Elecraft'
Subject: Re: [Elecraft] K3 output buffer modification
Hi Don,
I don't have anything that sensitive, so that's out. Perhaps I can borrow a
spectrum analyzer from
'
Subject: Re: [Elecraft] K3 output buffer modification
Hi Don,
I don't have anything that sensitive, so that's out. Perhaps I can
borrow a
spectrum analyzer from someone near me... or just wait for the P3 to
come
out. That's the only reason I performed the mod in the first place.
BTW
; d...@w3fpr.com
Subject: Re: [Elecraft] K3 output buffer modification
GreAt question!
73
John WD1V
Sent from my iPhone
On Jan 7, 2010, at 11:16 AM, Terry Schieler
terry.schie...@wirelessusa.com
wrote:
Did something change or am I misunderstanding Jim's post here. I
thought
: Thursday, January 07, 2010 11:17 AM
To: 'James Sarte'; d...@w3fpr.com
Cc: 'Elecraft'
Subject: RE: [Elecraft] K3 output buffer modification
Did something change or am I misunderstanding Jim's post here. I thought
that the IF Output Buffer Mod would not be necessary with the P3. If one
does
, 2010 11:17 AM
To: 'James Sarte'; d...@w3fpr.com
Cc: 'Elecraft'
Subject: RE: [Elecraft] K3 output buffer modification
Did something change or am I misunderstanding Jim's post here. I thought
that the IF Output Buffer Mod would not be necessary with the P3. If one
does the IF buffer mod
Hello group,
Just finished installing the K3 output buffer modification this afternoon.
I used the SMD resistor, and not the leaded part. Anyway, the most
difficult aspect was soldering the replacement back on and ensuring it
didn't move. I think I was successful. I may have chipped a tiny
If you have a second receiver, you could connect it to the K3 IF output.
Tune the second receiver to 8.215 MHz and you should hear whatever the
K3 is hearing at a similar signal level. (About an S-unit lower with
the K3 preamp off, one S-unit higher with preamp on.)
Alan N1AL
On Wed,
Hi Alan,
Unfortunately, I do not have a second receiver. Is there a way I can test
output voltages with my meter - anything at all to just confirm that the
resistor is indeed working?
Anyway, the rig passed the smoke test upon turning on so that's a good start
right there.
James K2QI
On Wed,
Unfortunately you won't be able to measure an RF signal at the IF output
connector with a meter or oscilloscope unless you have a REALLY strong
signal at the K3 antenna input.
As a general sanity check, you could do a DC voltage measurement on the
JFET just to make sure it is still drawing
...@elecraft.com]
Sent: Wednesday, January 06, 2010 4:44 PM
To: James Sarte
Cc: Elecraft
Subject: Re: [Elecraft] K3 output buffer modification
Unfortunately you won't be able to measure an RF signal at the IF output
connector with a meter or oscilloscope unless you have a REALLY strong
signal at the K3
James,
What do you propose to measure a 50 uV signal with? If you have
equipment that will measure levels that low, then well and good, but if
you are expecting to see it on an oscilloscope or RF Probe, you may as
well forget it. Recall that 50 uV is an S-9 level, and is -73 dBm which
is a
tonight.
Cheers!
James K2QI
-Original Message-
From: Don Wilhelm [mailto:w3...@embarqmail.com]
Sent: Wednesday, January 06, 2010 6:37 PM
To: James Sarte
Cc: 'Elecraft'
Subject: Re: [Elecraft] K3 output buffer modification
James,
What do you propose to measure a 50 uV signal with? If you
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