Turned on my K2 after about 4 months of not being used. No evident output
power! The rig has worked well without issues for several years since I built
it.
Checked with dummy load and was actually putting out about 200mW. Searching
archives, found similar problem mentioned with Don suggest
: elecraft@mailman.qth.net
Sent: Saturday, May 11, 2013 2:57:55 PM GMT -06:00 US/Canada Central
Subject: Re: [Elecraft] K2: Low Output Only on 160M
Mike,
The easiest way to troubleshoot that problem is to isolate the problem
to the failing stage.
Use the RF Probe and measure the points given for the transmit pat
appears to be
correct.
Checking the TP1, I get 6714 khz.
- Original Message -
From: "Don Wilhelm"
To: mtebe...@mchsi.com
Cc: elecraft@mailman.qth.net
Sent: Saturday, May 11, 2013 2:57:55 PM GMT -06:00 US/Canada Central
Subject: Re: [Elecraft] K2: Low Output Only on 160M
Mike,
T
Mike,
The easiest way to troubleshoot that problem is to isolate the problem
to the failing stage.
Use the RF Probe and measure the points given for the transmit path
starting halfway down the left column on page 14
Making those measurements on 40 meters will not be meaningful for your
problem
Hi,
I am having problems with my output power on 160M. It will only put out
about 1.5 watts when set for 10 watts. On all the other bands I am
getting between 9.4 and 10.3 watts.
I have double checked capacitors in the BPF section, double checked
capacitors and counted turns on toroid induct
Tomy,
What happens into a 50 ohm dummy load?
Do you see any HI CUR messages?
Has it always been this way? Or is this a new failure?
Is your power supply voltage dropping significantly during transmit?
If you power the K2 only through the 2.1mm coaxial power jack (remove
the APP connector from
I have lower output on all bands except 75 meters. I get 115 watts output on
75, and about 65 to 75 watts on all the other bands. Does not matter what
antenna I use the swr is about 1.2 to 1 on all bands. The serial number is
3213. Any ideas would be helpful!
Thanks
73! Tomy Ivan kf7gc
Raimon,
If you have the RTTY FL1 filter set to OP1 and the BFO frequencies set
the same as for SSB, there should be no difference.
EXCEPT
The RTTY filter set has an independent SSBCr setting in the menu, and it
should always be set to 1-1 for data modes.
If you have the SSB menu SSBC set to add
Hi Elekrafters
I need your help.
My K2/100 nr. 03529 with KSB2 SSB adapter and KAT 100 Antenna Tuner has
been working perfectly since I built it, with the exception of some
minor problems that were solved either with the help of Don Wilhelm or
after a search in the e-mail list reflector.
But
A couple of ideas: Make sure the trimmers that tune the bandpass filters
are not set at the extreme end of their range. Also check that T2 and T4
are wound properly, as shown in the manual.
G4BUE wrote:
Did you solve your problem, Ozzie?
I ask because I have the same problem on one of my K2s
Did you solve your problem, Ozzie?
I ask because I have the same problem on one of my K2s and cannot fix it.
Thanks and 73 de Chris, G4BUE
W6ICM wrote:
>
> My K2 has been working OK, until now...
> 80, 40 and 30 it has full output, but the higher bands, the output is
> down.
> Did the alignm
Phil,
The first thing to check is the bandpass filter for 80 meters. Check
that L5 is properly soldered and has a value of 33 uHy. Recheck the BPF
peaking using a transmit power of 1.5 watts.
Normally, the response across 80 meters is rather flat, and I suspect
that you have a problem with
I recently noticed while on 80 cw with a watt meter attached, that my output on
80 cw was only about 2 to 3 watts at the low end of the band, even though the
drive setting was for about 12 watts. I can't say I that I have checked the
output on 80 cw recently, so this may not be new. I built and
Hi, John-
Thank you for your post, as well as for the use of my service. In rereading
what I had written, I believe that my post might have come with a terseness
that I had not intended, so my apologies as well. K2-T2 is a little tricky
to get right, as is communicating with the written word it wo
On 9/4/07, Mychael Morohovich <[EMAIL PROTECTED]> wrote:
> I would like to offer that I do include a note with my K2 sets
> instructing the builder not to pull the leads too tightly while
> installing K2-T2.
Hi Mychael.
I didn't mean to sound insulting or belittle your service in anyway.
However,
Hi, John-
Since I am the fellow who provides the pre wound toroids, I would like to
offer that I do include a note with my K2 sets instructing the builder not
to pull the leads too tightly while installing K2-T2 . Its design is a
little unusual insofar that the toroid is spaced slightly up off of
JT,
The green leads of T2 are meant to be long so they can be routed under
the core as shown in the manual. Mychael does a good job of tinning the
leads for the proper length, but if you tug on them during installation,
you can pull the untinned portion of the lead into the hole and the
resu
Holy cow! I got it to work!
It was definitely a improperly tinned green lead on T2. So much for
buying pre-wound/tinned 'roids to save me some grief. Heh.
Thanks Don. What a relief. Time to button it back up and continue
40M TX alignment.
--
JT Croteau, N1ESE - Manchester, NH
_
On 9/4/07, Don Wilhelm <[EMAIL PROTECTED]> wrote:
> You should have zero ohms between the end of R54 and the end
> of R53 (the ends that are connected to the T2 winding) - if not, T2
> is not well tinned and soldered
Well, I am showing 12 ohms so I guess I'll have to take another look
at this bugg
JT,
Fine information. You have a problem between the collector of Q6 and
the bases of Q7 and Q8.
Your next step is to turn to the schematic RF Board sheet 4 of 4 and
locate Q6, Q7 and Q8 and all the components between them. Check all for
good soldering and be certain the 3 and 4 (green) le
On 9/4/07, Don Wilhelm <[EMAIL PROTECTED]> wrote:
> If you have little or no RF output
Exactly, this is my problem. Continuing onward.
> An added note - measure the RF voltage across your dummy load.
I'm not seeing any RF voltage across the dummy load. I am only seeing
about 350 mV of DC volta
JT,
If you have little or no RF output, do not be concerned about the early
stages having more RF voltage than is expected when the power is normal
(and that is your case). Continue onward.
If the K2 senses no power output, VPWR will ramp up to a high level
trying to obtain more power outpu
Don and others,
I just returned from buying a new DMM at RS and I didn't get very far
in signal tracing the transmitter before I started getting some
strange readings.
In my previous email, I mentioned that VPWR was reading high at 4.9V.
This can sometimes point to a problem in the RF output dete
On 9/4/07, Don Wilhelm <[EMAIL PROTECTED]> wrote:
> The quickest and IMHO the easiest way to find the problem is to build up
> the RF Probe (the parts were included with your K2 kit).
Yeah, I need to go buy a new DMM as I have no way to connect the RF
probe to my current DMM.
However, I just chec
JT,
The quickest and IMHO the easiest way to find the problem is to build up
the RF Probe (the parts were included with your K2 kit). Then turn the
manual to Preparing for Transmit Signal Tracing in the troubleshooting
appendix. Follow the steps until you find a place where you have
signifi
On 9/4/07, John Graf <[EMAIL PROTECTED]> wrote:
> One thing you might try is a relay reset.
Thanks John, this was one of the first things I tried. No luck. I've
done most of the checks in the 155 section of the troubleshooting
guide. I'm at a loss as everything appears to be fine.
Back to it..
During the initial TX alignment of my K2, I can't seem to get the
output power above 0.2W - it fluctuates between 0.1 and 0.2 and
doesn't change as I adjust L1 and L2. I am, however, able to tune L1
and L2 for RX just fine. I am showing 350 mV at my dummy load so some
RF seems to be getting throu
I have one the early early K2's (SN:247) that's been on the air since 1999
and so believe it or not, I just finally put it on a QRP watt meter to see
what it was putting out and was surprised to see it was a pretty consistent
7-8 watts on all bands. It doesn't seem to make any difference if I raise
On Fri Aug 5 23:04:11 2005, "Pat N8VW" <[EMAIL PROTECTED]> wrote :
>
> After some more debugging it appears that the ksb2 is causing the problem.
> Removing it returns tx power to normal levels. Some might say, good you
> don't need ssb anyway.
>
> Looking at the dac u2 I find that pin 5 is
Hi Pat,
There are three two signals fed into the KSB2 that directly affect
power output. One is V RFDET which controls the base of Q1 and the
other is ALC which is applied to the collector of Q1. Since removing
Q1 makes no difference, V RFDET isn't likely the cause. But the ALC
on the collector
G'day,
> After some more debugging it appears that the ksb2 is causing the
problem.
> Removing it returns tx power to normal levels. Some might say, good
you
> don't need ssb anyway.
Sounds somehow familiar. Check the resistor packs.
Regards,
Mike VP8NO
_
On 4 Aug 2005 22:40:19 -0400, "Pat N8VW" <[EMAIL PROTECTED]> wrote :
> My K2 (2016) is suffering low output starting on 20 and wrapping around to
> 10 and 160 where I get little to no output. 80,40,30 are unaffected. Rx is
> great. Symptoms include, low output and inability to increase output
My K2 (2016) is suffering low output starting on 20 and wrapping around to
10 and 160 where I get little to no output. 80,40,30 are unaffected. Rx is
great. Symptoms include, low output and inability to increase output beyond
a certain level. Both symptons vary per band. When I'm less tired I'll
OK,
I confess that after building control and receiver circuits [carefully]
with no problems, I wanted to believe the rig was 100% after initial
transmitter alignment. I put the rig on the air and made contact immediately.
THEN: a friend loaned me his OHR WM-1 wattmeter so I could actua
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