I used my K3 on 495-502 KHz as an experimental station. I got 1mw
output at the XVT Tx output jack running the TEST mode.
For amplifier, I bought a surplus Southern Avionics NDB (aircraft Non
Directional Beacon) transmitter. It is a xtal controlled oscillator
amplified to 100w into 50-ohm lo
Jack,
You will need the new synthesizer - two if you have the KRX3.
You will also need the KBPF3A. If you already have a KBPF3, there is an
upgrade kit that you can install - the KBPF3MDKT (see K3 Parts and Mod
Kits).
You will also need the KXV3 (or KXV3A or KXV3B) option in your K3
because t
These seem to be popular from what I've been reading lately:
http://www.monitorsensors.com/ham-radio/630m-transverter
--
John AE5X
https://ae5x.blogspot.com
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[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Jack Colson
Sent: Sunday, October 1, 2017 10:59 PM
To: elecraft@mailman.qth.net
Subject: [Elecraft] Upgrading K3 s/n 11xx to operate on the 472KHz
What needs to be upgraded or added to a stock K3 s
What needs to be upgraded or added to a stock K3 s/n 11xx to receive/transmit
on 472KHz?
Thank you,
73,
Jack, W3TMZ
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Pos
Wouldn't the new subrx also have to have the extra preamp to match the
one in the KXV3B?
73,
Victor, 4X6GP
Rehovot, Israel
Formerly K2VCO
http://www.qsl.net/k2vco/
On 24 Jun 2017 02:54, Don Wilhelm wrote:
I believe it has to do with reducing low frequency noise on the 8 volt
line.
The additio
I believe it has to do with reducing low frequency noise on the 8 volt line.
The addition of the capacitor was mentioned by Eric at the FDIM when the
K3S was introduced.
The new synthesizers made that lower frequency operation possible, and I
assume that during testing, the noise was noticed.
OK Don, I'll bite: What does a "220uF Solid Polymer Electrolytic
Capacitor on the output of the 8 volt regulator" have to do with an
"extension of the K3 tuning range to 100 KHz?" Voltage regulators are
usually found at the far end of the circuit from frequency determining
components. Enquir
Mike,
The KRX3A includes the 220uF Solid Polymer Electrolytic Capacitor on the
output of the 8 volt regulator.
As far as I know, there is no other difference. This capacitor allows
extension of the K3 tuning range (with the modified KBPF3 option) to
100kHz. See
http://www.elecraft.com/manua
An interesting question is just what is the difference between the KRX3
and the KRX3A.
Regards,
Mike VP8NO
On 23/06/2017 17:57, Gmail - George wrote:
The above assumes the new sub-receiver will operate with the old style
synthesizer!
__
Christopher,
Many of us who have upgraded have extra old style synthesizers with no plans
for them.
If the cost of upgrading your main synthesizer is stopping you from getting
a sub-receiver, I and many others would be glad to loan or give you an old
style one.
In the long run a sub-receive wi
Chris -
The new sub receiver comes with the new synthesizer, so you will only need
to replace the one in your main receiver, if you have not already done
that. The synthesizers must both be the same.
73 de Dave - K9FN
On Fri, Jun 23, 2017 at 4:08 PM, Matthew George
wrote:
> I assume you mean s
I assume you mean sub receiver? If so, yes you will need two of the new
synthesizers. It's all in the FAQ from 2015 located here on the elecraft
website: http://www.elecraft.com/manual/KSYN3A%20FAQ-ver-C-2.pdf
Well worth the upgrade by the way!
Mg NG7M
--
Matthew George
801-560-8754
> On Ju
Hi I am looking to upgrade my K3 with a sun receiver, to do this am I
correct in assuming that the new part will come as per K3S spec? if this
is the case do I then have too upgrade the existing with the new K3S
synthesiser card also?
What else do I then need?
regards
G0TZZ
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Yes, it can be tricky (I call it "fiddly"), especially the first time.
If the connectors are aligned with the KRX3A pc board as seen from above in
Fig 48 in the KRX3A manual, they are properly mated.
73, Ron AC7AC
-Original Message-
Removing the left side panel also makes it much easie
true of the front-panel connectors, by the way.)
73 from Ian GM3SEK
>-Original Message-
>From: Elecraft [mailto:elecraft-boun...@mailman.qth.net] On Behalf Of
>Don Wilhelm
>Sent: 15 July 2016 00:37
>To: Brian F Wruble; Elecraft Reflector
>Subject: Re: [Elecraft] Upgradi
ailman.qth.net] On Behalf Of Brian
F Wruble
Sent: Thursday, July 14, 2016 13:10
To: Elecraft Reflector
Subject: [Elecraft] Upgrading K3 --- order of installation
When the K3S first came out, I ordered the new synthesizer boards for my K3,
and they installed easily and worked great.
I also ordered
Brian,
Those are in physically different areas of the K3, so I don't think the
order is significant.
If you have the KRX3 installed, I would suggest adding the KBPF3A first
(don't forget the added capacitor to the regulator output), and then
leave the KRX3 assembly out until you have install
They're kind of spread out so I don't thinking makes much difference.
Download the various assembly manuals and see if there are two or more that
need common panels/parts unassembled and do those at the same time.
Sent from my iPhone
...nr4c. bill
> On Jul 14, 2016, at 4:10 PM, Brian F Wrubl
When the K3S first came out, I ordered the new synthesizer boards for my K3,
and they installed easily and worked great.
I also ordered the KXV3B, KAT3A and the KBPF3A. I am just now getting ready
to install these. Does anybody have advice on the best order to install them?
Or any cautions
On Sun, 2010-09-19 at 09:06 -1000, John Buck wrote:
>
> Given a number of reports about trouble downloading the latest K3 and P3
> firmware, I decided to report my success conditions.
Currently, in order to update K3 firmware with the P3 in line, you first
have to turn off the P3. That can be d
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