Does it have gold pins on the front panel connectors? If not, all kinds
of strange problems can arise.
Dave Hachadorian, K6LL
Yuma, AZ
On 11/19/2021 5:52 PM, Dick Frey wrote:
My k3 keeps losing its mind. One day it won't transmit SSB - I can whistle
up 100W but speech gives 5W of avg and
I have used the Heil Pro 7 also. While they displayed no RFI issues, they
fall far behind the Bose QC35s, Radiosport, and even Bose QC25s in keeping
out KPA1500 fan noise. They worked FB for me in the CQWW SSB test, where
the KPA1500 fans rarely turn on, and never get louder than FAN1 at my
My k3 keeps losing its mind. One day it won't transmit SSB - I can whistle
up 100W but speech gives 5W of avg and ~15W peak.
On another day it says "KAT500 not turned ON". I have a KPA500 but no
KAT500.
My fix for both these has been to do a factory reset and reload my last
saved configuration --
FWIW, I have been using Heil Pro 7 headphones successfully for years. I use cw
95% of the time, including during quite a few enjoyable CWT events. I only
occassionally use the mic and ssb mode. I own several pair that I use with
their specific radios. I use them on my Elecraft K2, and KX2, my
Eric,
The schematic for the KXV3B-2 BNC Board
shows a COR and associated RF detector
circuitry for the RX ANT IN port. There
is also a protective spark gap on that
input, presumably for lightning induced
voltages on the RX antenna.
I haven't checked the K3s manual,
but the RF detector circuit
Dave,
Being a little 'tongue in cheek' the answer is -- That depends on what
you mean by "good"!
Seriously, the fact that you can turn it on and off in the menu only
means that there is a response from the KIO2 when it is communicating
with the MCU over the AUXBUS line.
I would suspect the
I agree. I had a strike zap the KIO3 in my K3 because even though all
my other gear was unplugged at the time, my laptop (which interfaces to
my K3) wasn't. at first thought it was the KUSB. I bought a second
one figuring it wouldn't hurt to have a spare if the cable turned out to
not be
On 11/19/2021 1:40 PM, Dave Sublette wrote:
I'm wondering if the KUSB cable is bad(probably due to the strike)?
I would expect damage to electronics rather than cables. But ya never
know. :)
73, Jim K8YC
__
Elecraft mailing list
I had a lightning strike and am getting things back together. I am
attempting to connect via a KUSB cable with a series adapter to make it a
proper cable for the K2.
The PORT menus says the port is ON and I can turn it ON and OFF as outlined
in the manual.
Prior to the strike, this same radio
I've heard unsubstantiated tales that a KX2 is in operation at Mayotte.
He's on 21.001 (listening up 2) now (1915Z) with a decent signal into W5.
Smallish pile-up given the Rarity Factor.
John AE5X
https://ae5x.blogspot.com
__
Elecraft
Bill,
That was why Elecraft released MCU 2.04r which is exactly the same as
2.04P, but the sidetone source is locked at U8-4.
That can happen if someone EDITs the ST-L menu and then taps the DISPLAY
button without exiting the menu first.
Many hours of support time had been spent on the "I lost
Bill,
In the KPA100, the normal Vss is about -25 volts, so suspect that
something may be loading that negative supply.
Pull U4 out and measure that voltage again. If it is still not negative
enough, you may have a problem in the T/R switch. Check for 90 to 150
volts on the highest voltage
Alright, I have figured this out.
I’m not sure why I was seeing Vss of -5 volts. I re-checked the negative supply
on the KPA100, flowed the solder on D7 and D8. After that, I was seeing almost
-24 volts at the Vss pin, without U4 in place.
With U4 connected and everything hooked up, Vss was
I have the WH1000-MX3. I use them daily but for non-radio stuff. Easily the
best headphones I’ve ever had or used, for comfort and noise cancellation.
They sound great too.
I have used them with my KX2 when traveling, but I don’t think I’ve ever
used them at higher power so can’t comment on RFI or
Don,
Managed to do a little diagnosis.
I pulled the MAX1406 chip KPA100 U4.
I see proper continuity between pin 12 of U4 and pin 25 of the MCU, and pin 11
of U4 and pin 26 of the MCU.
Going back, I checked out the Vdd, Vss an Vcc voltages on U4.
Vdd is 14 volts
Vcc is 5 volts
Vss is -5 volts
Serial Number 2548.
The current MCU I have is version 2.04P. (latest)
The unit I swapped in earlier was, I think 2.03. I don’t have it with me, and
I’m not sure.
> On Nov 18, 2021, at 5:14 PM, Don Wilhelm wrote:
>
> Bill,
>
> What is the level of the MCU (before you changed it), and what
Exactly, working one day with WSJT-X, next day, not.
> On Nov 18, 2021, at 5:10 PM, Don Wilhelm wrote:
>
> Matt,
>
> I Forgot to mention that to Bill. The special cable does not have to be very
> long, but it must be present. Only pins 2, 3 and 5 should connect to the
> RS232 connector on
Yes, I know. I’ve been using the cable that I built back in 2002, when I added
the KPA100, and later modified when I added the KAT100.
> On Nov 18, 2021, at 4:14 PM, Matt Maguire wrote:
>
> Don’t forget, you can’t plug in a USB adapter directly into a K2, as the
> wiring is not standard
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