Sanjin,
In that case, certainly try the resistor changes. The change is
reversible. If the SSB power out is not up to what it should be after
the change, then you will know that there is some other problem.
The K2 LED bargraph is almost as fast as an oscilloscope display - after
the change, c
Hello Don, hello Peter,
I tried to transmit in a dummy load before the effect was the same. In fact
I did almost all the testing with a dummy load.
Just tried what you suggested, set requested power to 4 Watts and
transmitted CW in a 20 W dummy load through my Wattmeter - I do not have an
Oscill
Sanjin,
Those resistors that Peter mentioned are the same changes to the KSB2
ALC circuit that I was referring to.
However, since your KSB2 has no additional gain modifications, I would
prefer that you determint that there is no other problem before making
those changes. I suggest the followin
Tajic, E71DX
> Gesendet: Montag, 9. August 2010 15:13
> An: elecraft@mailman.qth.net
> Betreff: Re: [Elecraft] K2 SSB ALC Problem
>
>
> Hello Peter,
>
> I have seen your suggested mod in the Summary of K2 Mods Document on your
> Site before but was not sure if I should
Hello Peter,
I have seen your suggested mod in the Summary of K2 Mods Document on your
Site before but was not sure if I should do it since the behaviour is the
same weither the KPA100 is connected or not.
Dankeschön für deinen Input!
73, Sanjin
E71DX
--
View this message in context:
http://e
Sanjin,
I have seen this in some seldom cases when KPA100 was used. Absolutely
successful is following Mod I got from Elecraft Support some time ago:
You need to change R9 to 1.5K on the KSB2 if the ALC
is not able to keep the SSB RF output under control.
Then also cut the PCB trace to the base
Hello Don,
thanks a lot for taking you time!
I have SSB-A set to 1 but I can get a lot ALC action very easily.
My KSB2 Board is a Revision D with firmware 1.08 and there is no additional
transistor around U5 on the top or the bottom side of the board. I do have
an KPA100/KAT100 in an EC2 enclos
Sanjin,
What setting do you have for the SSBA menu parameter - for the MH2, it
should be set at 1.
Does your K2 have any additions to the KSB2 board, such as the KI6WX
increased gain mod? If you don't know, open the K2, remove the KSB2
board and check for an additional transistor mounted on t
Hi All,
I have a K2 which I bought used. I never really used it on SSB but from time
to time would like to.
The problem is when I transmit (Mic is the Elecraft MH2) I get very hard ALC
action which jumps to full ALC scale reading.
I tried to "inject" (via the Mic in a quiet room) a constant mod
ve no RF earth. I would suggest that you try
grounding the station to get rid of any stray RF that might be coming in
especially on voice peaks. Other than that, the suggestions that Don made
will hopefully cure the problem
73, George, NC5G
--
View this message in co
Martin,
You may be driving the internal ALC too hard. With the MH2 mike, it is
rare to have to use SSBA higher than 1. Try bumping up the compression
to 3, I think you will like it better.
A HiCur message only relates to the base K2, not the KPA100, and means
the current set in CAL CUR is b
Hello, I've recently started to use my K2/KPA100 on SSB running 100W
with an MH2 mike mostly on 80m. I use 2:1 compression and mic preamp is
set to 2. The antenna is an 120ft doublet, 30ft of 300ohm ribbon feeder,
remote mounted z match tuner right under the centre of the doublet and
approx 70ft RG
Thanks to all who replied with suggestions. I traced the signal and
found the problem. Turns out to be user error... I have the K60XV module
installed using BNC connectors on the top cover. Well, when installing
the SSB module, I removed the top cover and hence the K60XV, but didn't
bypass it b
On May 12, 2010, at 11:45 PM, Sean Cavanaugh wrote:
>
> Any ideas on where to start troubleshooting?
Isn't there a signal tracing guide in the K2 manual? I would start there.
Bill Coleman, AA4LR, PP-ASELMail: aa...@arrl.net
Web: http://boringhamradiopart.blogspot.com
Quote: "Not within
Hi,
I was installing the SSB module in my K2 earlier this evening, and think
I have majorly messed up the rig. I installed the SSB module per the
instructions. While I was plugging in the K2, I brushed the chassis with
the end of the connector which apparently was energized and blew the
circui
Doug,
Well, stuff like that happens to all of us at one time or another. When
it happens to me, I just jot down a "Dear Dummy" note to myself and go
on with life. Glad to hear you found it.
73,
Don W3FPR
Doug Heacock wrote:
> Boy, is my face red. For the benefit of those who helped with sug
Boy, is my face red. For the benefit of those who helped with suggestions
concerning my SSB issue (power output pegging and out of control on PTT), I
must confess that when I began looking at this again (for the first time in
several years), I had completely forgotten that when I removed the SSB
a
Thanks, Don--I do have the same symptoms when I connect paddles and hit the
dot paddle in SSB mode--I'll try the adjustment you recommended and keep
working at it.
73 de aa0ms
On Mon, Feb 8, 2010 at 6:08 PM, Don Wilhelm wrote:
> Doug,
>
> Start with the easy things first - it could be RF Feedba
Brian,
Don't do a "re-boot" of the K2, it is not likely to solve anything and
will only lose your menu settings including the filter and PLL data.
You have an intermittent somewhere, most likely on the KSB2 board. I
have (only once or twice) seen an intermittent connection in the carrier
balan
Doug,
I have owned and used my K2/100 on SSB and CW for almost 10 years, but it
has been relegated to "second radio" duty since getting my K3 a year ago.
I've been getting the K2 ready for a DXpedition for the last few days and I
have noticed a similar symptom to what you describe, as part of a
m
Doug,
Start with the easy things first - it could be RF Feedback or some type
of oscillation in the mic itself - or it could be a lack of carrier
balance on the KSB2 board. To check quickly, do not connect a
microphone at all - just connect your paddles to the key jack, and in
SSB mode, close
I dusted off my old K2 recently and decided to try to wire up an electret
mic and give SSB a try--I've had the SSB module since I built the K2 years
ago, but just never used it, because I had no mic at the time. I've
discovered that when I ground the PTT line with the K2 in LSB or USB mode, I
get
Allen,
Set SSBC to 3-1 and try it again. I believe you will be pleasantly
surprised. You may even be able to move the SSBA parameter to 1 if you
set the compresssion higher.
73,
Don W3FPR
Allen Wisbey wrote:
> Ok, smart people, I am having a problem and I know not where to look...
>
> I have
Ok, smart people, I am having a problem and I know not where to look...
I have a newly assembled K2 with DSP, NB, SSB, 160mtr, 60 mtr options,
MH2 mike. All testing went fine throughout.
I am not able to get any ALC indication unless I yell into the mike,
whistling sometimes will flicker one ba
Joe,
It is difficult to say what others may perceive as "fuzzy around the edges".
May I suggest that you operate the K2 into a dummy load and listen to it
yourself on your FT-1000D. Actually it would be better to record the
output of the FT-1000 and listen to the recording because it is
diffic
I have a K2, mid 5000 serial number, mic input wired for Kenwood, 50 amp 12
volt Amidon power supply, with a KPA100 running 100 watts. I can easily switch
my HM-10 mic between transceivers using seperate audio cables for each radio to
perform on air testing. When using a Heil microphone HM-10 wi
On Fri, 07 Nov 2008 09:34:02 -0500, Don Wilhelm wrote:
>Those are the pros and cons that I know about.
I'll add a few things.
1) The K2 with KSB2 is a bit low on transmit audio gain, so with
some mics, you may not get as much "processing" as in some other
rigs.
2) The K2 with KSB2 has a bit
I used and did some testing with original KSB2 and QRP mode. The SSB signal
is readable and useful although neither contest nor HiFi quality. While it
does not have RF processing, it has some compression to a degree that
outboard speech processors do not help any more. The narrow signal may be an
Curt,
I do not know which threads you are referring to. The K2 with the KSB2
is quite good with excellent carrier suppression and will provide an
audio passband consistent with the filter width you have installed on
the KSB2 board.
If you have the older 2.1 kHz filter width, the passband plac
I've had my K2 (5705) for a couple of years, with the KSB2. Alignment is a
little tricky and it is important that it is done correctly, but I've had no
problems with it. I've made a good many contacts (been using CW more) and
have gotten some complements on the audio, so I think the bad reputa
If you want to wow the hi-fi crowd with your SSB prowess, the K2 isn't
the rig. If you're wanting a good sounding SSB rig, the K2 is fine. It
generates perfectly workable SSB comms despite rumors to the contrary.
It is important that you align the filters correctly to get the best
audio it can g
Completed K2 s/n 6424 a few months back, am thinking of adding a KSB2
adapter kit I own. I've seen several threads indicating that the SSB
performance of the K2 with the adapter isn't very good. Would adding this
capability be worthwhile, or is leaving the K2 as CW only a better option?
73,
DW,
When adjusting the carrier balance, you are adjusting for minimum
transmitted carrier - you want that to be at the lowest level possible.
Yes, if you have something sensitive enough to measure a low RF output
level - then run the K2 into a dummy load and connect the sensitive RF
meter ac
Hello,
I'm trying to align the SSB board on a K2. The manual on page 19 says to do the
fine carrier balance adjustment using an external receiver.
It says "If you're tuned to a setting that allows you to hear the voice signal,
you'll be at the zero-beat frequency of the carrier and will not be
Raimon,
I am pleased to hear you now have it working.
Yes, solder connections may be like that, particularly if the solder pad
did not receive enough heat during the initial soldering. No matter how
good one's soldering skills are, it is always possible to be distracted
and not to notice the
Dear Don
I thank you for the information.
Following your advice. I looked first for a bad solder in the KSB2
module. As no poor solder was apparent, I decided to resolder all
connections. After this re-work the failure has been cured. The K27100
in SSB mode is working again as it had been unti
Raimon,
I do believe your first checks should be on the KSB2 option board.
Look at the schematic for the KSB2 in the lower left corner area - you
will find several passive components associated with Q1, D1 and D2 -
those are the components are in the SSB ALC section and are the ones to
check.
Hi all
I am having troubles with my K2, and need your help.
My K2 is nr. 3529, with K2/100, KAT 100 and KSB2SSB
It has been working fine until now, mainly CW and BPSK31
Now it continues to work all right in CW in all bands, but in SSB power
output drops substantiably in 20, 30, 15 ,12 and 10
I just finished constructing the KSB2 Adapter and have installed the unit and
am at the alignment stage (P-19 of the manual).
The Course Carrier Balance Adjustment went fine.
When I plug in the microphone and try the fine Carrier Balance Adjustment the
unit begins to transmit at full output
ROTECTED]>
To: "Elecraft List"
Sent: Friday, May 16, 2008 7:12 AM
Subject: [Elecraft] K2 SSB Watery Audio Distortion
> There has always been some watery distortion on my SSB signal from
my
> K2/100.
>
> It is there with or without the KPA100.
>
> It is there with thr
John,
You said it is there with and without the KPA100. Have you physically
removed the KPA100 and tried it with just the base K2?
If not, please try that. Should the base K2 be clean, re-install the
KPA100, but after it is installed, remove the right side panel and
fold/tuck the ribbon cabl
There has always been some watery distortion on my SSB signal from my
K2/100.
It is there with or without the KPA100.
It is there with three different mikes.
It is there with two different KSB2 modules.
It is there on both upper and lower sideband.
The CW signal sounds pretty good, no obviou
Jay,
Info 230 says that the K2 is not detecting the internal counter probe
plugged into TP2.
Either you forgot to put the probe in or there is something wrong with
the probe.
73,
Don W3FPR
Jay wrote:
Thought I would touch up the SSB alignment of the filters on my K2
#279 since the audio on
Thought I would touch up the SSB alignment of the filters on my K2 #279
since the audio on both lower and upper SSB seems to lack base. CW is
perfectly centered on freq as I like it. Downloaded the latest
Spectrogram and procedure, but after changing the BFO setting (on the
2.4 filter from 11
(Brian WB6RQN asks for an easy way to do digital modes on a K2, for
his Montessori school rig:)
If you have a Mac, the soundcard SSB modes can be done easily. I use
CocoaModem. Receive needs only a stereo cable from the K2, either
the headphones jack or the aux speaker, to the mic input o
Lennart,
I am glad to hear you found the problem source.
Things like that happen to all of us at one time or another. Mark it up
to experience and go on with other things more important.
73,
Don W3FPR
Lennart wrote:
So I check on the schematic and there is a lot of "RP3" there... When I t
Don Wilhelm wrote:
>
> Lennart,
>
> If you have transmit power problems in CW mode or TUNE, then the only
> part of the SSB opyion board that could cause that condition is Q1, Q2,
> Q3 and the associated components.
>
> Look at the KSB2 board schematic near the bottom and you will see which
Jerry,
T1 and T2 are not in the path for CW or TUNE, so they are not high on
the list of suspects for Lernart's situation.
OTOH, if the low power is on SSB (but CW and TUNE are good), then T1 and
T2 would be the prime suspects.
73,
Don W3FPR
n0jrn wrote:
Lernart:
I had a similar problem
Lernart:
I had a similar problem with my K2 #6272. Gary sent me a response
stating that T1 and T2 could cause
a low power situation on the higher bands IF they were
switch or the turn count was wrong or bad solders
I checked all mine and found that I had all turns co
Lennart,
If you have transmit power problems in CW mode or TUNE, then the only
part of the SSB opyion board that could cause that condition is Q1, Q2,
Q3 and the associated components.
Look at the KSB2 board schematic near the bottom and you will see which
components need to be checked.
Th
After I installed the K2 SSB adapter I get half or less power on all bands
except 30 meter. On 20 almost nothing. SWR low through SGC239. Removed
adapter and everything worked normal. Put the adapter back in and power is
back to low level. It behaves like the SWR suddenly increased or SWR sense
ac
Nope, KSB2 kit had an extra 10K in it.
I checked all others to insure there wasn't a second mistake. all is
well.
Jerry N0JRN
On 3/8/2008 8:47:17 PM, Ken Kopp ([EMAIL PROTECTED]) wrote:
Hi Jerry,
Where did the 10K resistor you put in the wrong place
-really-
Thanks to Gary and the tip he sent me.
Just a note, IF your not getting good power while in SSB on the higher
bands,look at T1 and T2.
Gary ask me to check them to insure I had the right number of turns and had
them in the correct place. Course all that was good but it prompt
Well, this is a strange deal and I'm not seeing anything in the archives
relative to this particular situation.
Just installed the KSB2 in K2 # 6272...
Finished the alignment and filter settings
Figured I would play with it for awhile and see how it does. WRO
On my site I have some mods which I think improve the K2 transmit
audio.
http://homepages.nildram.co.uk/~baker/
73
Stewart G3RXQ
On Fri, 8 Feb 2008 14:34:54 -0700, DW Holtman wrote:
> Hello,
>
> First let me state, I was not trying to run down the K2. Just
curious about
> the reviews. I own a K1
CTED]
[mailto:[EMAIL PROTECTED] On Behalf Of David Cutter
Sent: Friday, February 08, 2008 11:32 AM
To: G4ILO; elecraft@mailman.qth.net
Subject: Re: [Elecraft] K2 (ssb)
My K3 has yet to arrive, but, wouldn't this "punch" come from the voice
equaliser? ie setting the voice band to
Hello,
First let me state, I was not trying to run down the K2. Just curious about
the reviews. I own a K1 and I'm on the waiting list for a K3. I would not
sit around and wait months for something if I did not think it is the best
available.
Thank to most that responded both on and off list
My K3 has yet to arrive, but, wouldn't this "punch" come from the voice
equaliser? ie setting the voice band to suit your own voice to peak in the
right place.
David
G3UNA
If I wanted to be controversial (what, me?) I'd say that the K2 SSB audio
is
better than the K3's. The K3 sounds clea
Tim O'Rourke wrote:
>
> I have had opposite experience. I use mine (Serial 8XX) on both ssb and
> cw. I have had excellent audio reports and busted lots of pileups with
> 5-10 watts ssb due to excellent audio quality. I do have a small preamp on
> the back of the mic connector and I use all Heil
All K2'ers
When aligning SSB filters be ware of the low freq cutoff in the audio
chain if you are measuring across the loudspeaker terminals.
The original RX audio low freq. cutoff (-3db) freq. is approx. 640Hz
(with KAF or DSP moduls installed)
or 400Hz (with no audio moduls). The cutoff is
de
Mike,
As has been stated earlier on the reflector, 80 or 40 meter LSB should
sound the same as 10 meter USB - there is a sideband swap due to the VCO
injection frequency at 15 meters and above. You could be having some RF
feedback problems on 10 meters, or it could just be a matter of more
p
hi Mike,
On 29 Nov 2007 at 22:33, Mike Geddes wrote:
> The audio quality on my K2 was pretty bad on SSB, transmit and
> receive. I followed the SSB manual advice and adjusted BFO1 using Cal
> Fil on upper and lower sideband (on 80 meters) until I got it sounding
> pretty good. Not perfect. But p
On Nov 30, 2007 3:33 AM, Mike Geddes <[EMAIL PROTECTED]> wrote:
> The audio quality on my K2 was pretty bad on SSB, transmit and receive. I
> followed the SSB manual advice and adjusted BFO1 using Cal Fil on upper and
> lower sideband (on 80 meters) until I got it sounding pretty good. Not
> perfec
The audio quality on my K2 was pretty bad on SSB, transmit and receive. I
followed the SSB manual advice and adjusted BFO1 using Cal Fil on upper and
lower sideband (on 80 meters) until I got it sounding pretty good. Not
perfect. But pretty decent. I then tried to transmit on 10 meters upper, an
> I don't have my manuals in front of me now, but it seems to
> me there is a filter on the SSB mod board in the K2 that sets
> the bandwidth.
If you could send this email, you should be able to access the Elecraft web
site where manuals are readily available.
> The filter is built with crystal
Does anyone know...
I don't have my manuals in front of me now, but it seems to me there
is a filter on the SSB mod board in the K2 that sets the bandwidth.
The filter is built with crystals and there is no way to tune
it. You theoretically could change the fixed capacitors to widen out
the
Paul Pollock wrote:
2). A pad buffer (at the output of the dummy load) to be used to filter
out/reduce the transmitter RF, and detect/output the audio. This is used
as the input to a computer soundcard (for use with Spectrogram or other
spectrum analyzer)) for transmitter bandwidth/BFO analysis
:
Date : Sat, 28 Jul 2007 15:19:50 -0400
Subject : Re: [Elecraft] K2 SSB Problem
> Have you removed C167 from the RF Board?
> If you have removed it, there may be a problem with the ALC circuits on
> the KSB2 - check D1, D2 - look at the schematic and identify the
> comp
27;73 de IZ1DUG Fabio
-- Initial Header ---
>From : "Don Wilhelm" [EMAIL PROTECTED]
To : "[EMAIL PROTECTED]" [EMAIL PROTECTED]
Cc : "elecraft" elecraft@mailman.qth.net
Date : Sat, 28 Jul 2007 08:17:10 -0400
S
Fabio,
I cannot be specific, but the most probable area causing that trouble is
the area of Q2 and Q3 (those direct the BFO signal either to the
balanced modulator in SSB mode or back to the RF board for CW) or the
balanced modulator U5.
Check carefully to be certain diodes D5, D4 and D3 ar
Hi,
I just finished installing the KSB2 module on my K2 QRP version (full
optional). I go to operate for the first time but when I push the PTT I get
this problem: the current absorbed increases (the voltage decrease) until it
exceeds the value 4 A (set at this value after some test) and the
Kenneth E. Harker wrote:
example). With the K2, you can get a 10 kHz per knob revolution at 100 Hz
tuning, or 10 Hz tuning at just 1 kHz per knob revolution. 100 kHz tuning
Was the kHz a typo here?
I've tried replacing the optical encoder in the K2 with one that is higher
resolution. If
Whoops - I failed to see the KSB2 in the subject line, so I assumed a
K2. There are 2 RP3s in the KSB2 - one mounts on the front panel board
and is a 10K r-pak (last 3 digits - 103) and there is an RP3 that mounts
on the KSB2 board of 2k in value (last 3 digits = 202).
73,
Don W3FPR
Clark M
Clark,
You must be doing an inventory for the control board - the front panel
has no RP3 and the RF Board has the thermistor board in place of RP3.
On the R-Paks, the last 3 digits of the number on the body are
significant. In the case if CB RP3, it is 47k ohms, so look for a '473'
at the e
Ooops - KSB2 should have read K2! Sorry.
73,
Geoff
GM4ESD
- Original Message -
From: "Geoffrey Mackenzie-Kennedy" <[EMAIL PROTECTED]>
To: "Elecraft Discussion List"
Sent: Saturday, June 16, 2007 3:46 PM
Subject: Re: [Elecraft] K2 SSB Option RP3 Question
Clark, I do not have my manual for the KSB2 here but you could try measuring
the resistance between pins and see if the results agree with the values
shown in the schematic. If they do and the physical size is OK I would use
it, but you might like to get a second opinion before doing so.
73,
Geof
I'm buidling my K2 purchased at Dayton and found a problem when doing a parts
inventory. The Parts List designator for RP3 is far different than the part I
received: it says 806345. Does anyone know if this is a acceptable substitute?
There's nothing in the manual/Addenda nor in the reflector
Is it only on SSB (and not on CW)?
I've had this with many rigs (but not just SSB). Tapping the CW key
(providing watts output) may "cure" it by assuring continuity at some
downstream contact or relay (antenna box, coax connections, etc).
When I note this, it is time to clean (or at least cycle
In a recent message, Mike Short <[EMAIL PROTECTED]> wrote ...
My K2 has an interesting problem. While listening to SSB, after a period of
time, the audio fades way back. If I tap the key, and briefly put it in
transmit, it comes back.
That sounds like a similar problem to what I had. It turned
My K2 has an interesting problem. While listening to SSB, after a period of
time, the audio fades way back. If I tap the key, and briefly put it in
transmit, it comes back. Also, I do not have any audio on transmit unless
the meter is set to ALC. If it is in the RF position, it transmits, but only
Mike,
Unless you have good IDS connectors to stick the wires into, yes those
things are tricky.
Personally I prefer the straight across computer jumpers where
applicable and I use wirewrap for the rest, but for those who do not
have wirewrap tools and wire, that is not a really good solution
Ugh-h-h! Been trying to do Tom's (N0SS) microphone configuration header for
P1. After hour and a half I figure there must be a better solution! Maybe
my connectors were not very good quality . . . but had trouble keeping the
wire in, tabs breaking, blah blah blah. Messed up the two connector
Harold,
If the mic element is an electret type, yes the mic needs power. Use a
5600 ohm resistor in most cases. If the resistor is omitted, behavior
will be as you describe.
You will have to consult the information for the mic plug pinout to
determine which pins the resistor connects acros
I just finished installing my new SSB board and have a couple questions.
1) Can I use my HTX-10 mike?
My rig will mute when I hit the PTT but no power out.
I don't know if this is the mike or something wrong with my board.
There is no indication of power or any signal out.
I did the coarse adjust a
Steve:
PTT is the same as the dit line for CW, so that works because all you
are doing is closing the dit line with your mic PTT switch.
John AA0VE
[EMAIL PROTECTED] wrote:
This morning I connected a Heil - Elecraft MH2 mic after installing all 8 RF
board header pins and the requisite 5.6K re
Steve,
I believe these are both configuring parameters of the KSB2 board (audio level
and compression level). So you can't change them without that. Sounds like you
are trying to use SSB without the KSB2??
73,
Tom KG3V
Quoting [EMAIL PROTECTED]:
> Hello Everyone,
>
> This may be a pretty elem
Hello Everyone,
This may be a pretty elementary question, but I'll ask it anyway.
Am I correct in concluding that the SSBa and SSBc menus CANNOT be edited
without the KSB2 accessory in place on the K2 RF board? (All I see are --
entries in both menus when I try to edit them.)
This morning I
I?m receiving reports that my SSB slightly sounds like "C"-Amplifier
instead of "AB". This is independent of power setting and mike
amp-setting, but increases, when I increase the gain of the speech
processor. I?m using the Heil MH2-Mike.
I?ve looked at the circuit diagram and the voltage char
Fred:
I find the K2 on SSB is perfectly adequate, I even get compliments on audio
quality. No problems in DX pile ups. I'm using a Kenwood MC-60 desk mike and
previously a Kenwood hand mic, an MC-43 perhaps?
And if you're looking for a 100 watt amp, the KPA100 is the only game in town.
I use m
Fred,
What specifically are you referring to?
As is, the KSB2 offers excellent carrier rejection and a good filter for the
transmitted SSB signal to provide excellent undesired sideband suppression.
One must align the SSB FL1 filter properly if the full capabilities are to
be realized - you can
Elecraft Inc. -
Does Elecraft have any plans to upgrade the K2,
for better SSB operation?
I probably lean more towards SSB voice, vs CW.
I know the K2 is an outstanding CW rig, even in
QRP mode - but it seems evident that the K2 is
lacking or secondary, when it comes to robust
SSB operation. I d
When I tune my K2 in a carrier ( all HF bands excl. 160 mtrs ) I notice the
K2 SSB setting has an over 10 dB worse s/n.
I really mean worse s/n, no difference in audio ( gain ).
My calibrated HP 3335A generates the carriers.
My calibrated HP 8568B spectrum analyzer shows the the audio output S/N.
I just wanted to post a general thankyou note to all the people who
sent helpful hints to try and resolve the problem I was having with
the SSB filter in my K2. It turns out that I'd installed D4 and D5
on the SSB board backwards (doh!).
Anyway, lots of useful tips pointed me quickly in th
Ken,
The mistake I made on my KSB2 adaptor acted/sounds like what you are
getting. Have you tried to transmit? Is there audio/RF out? Check the
switching diodes found at either end of the Xtal filter section. Is the
right end up? Are they installed in the right direction. I got one backwards
and go
Ken,
That is a sign that something is amiss with the filter on the SSB board.
Check all the diodes and the toroid transformers. Be certain the tiny RFCs
do not have any bare wire that is shorting to the crystal cases (slip a
piece of paper between the RFC and the xtal case to check).
On the RF B
Ken -
I installed/built KSB2 in my K2 # 5422, last month.
I got poorly sounding "filters", before I went thru
an entire "SPECTROGRAM rev 5.7" filter and BFO
settings alignment. Spectrogram 5.7, is the
last free version of this software. I used my
laptop's sound card system (mike input), to
run
Hi Everyone,
I've just fitted the KSB2 adaptor to my K2 (#5294), and seem to be
experiencing some oddness. When I select OP1 as the filter, the
signal seems to be greatley attenutated (no signal strength on the S
meter), and you need to have the AF control at near maximum to hear
any out
f Stewart Baker
> Sent: Sunday, March 12, 2006 7:21 AM
> To: ON4WIX; elecraft@mailman.qth.net
> Subject: Re: [Elecraft] K2 - SSB TX audio
>
>
> Hi Glenn,
>
> The audio gain on the KSB2 board is marginal. Some get away
> with it, but others
> do not. Your diagn
Hi Glenn,
The audio gain on the KSB2 board is marginal. Some get away with it, but others
do not. Your diagnosis of the effect of the compressor chip noise gate is
probably correct. This affects not only the level of the audio vs RF in the
balanced modulator, but also the VOX operation.
I have
Hi all,
another day, another question it seems...
I finished building the KSB2 board yesterday and installed it in my K2 s/n 5361.
All test results were OK. I changed the BFO settings as per the manual
instructions.
This morning I made a recording of my transmissions. The K2 is hooked up to a
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