Re: [Elecraft] K2 SSB Power Overshoot on First Syllable

Hi Karin, You've resurrected a topic that was once very active on this same Elecraft reflector: https://www.mail-archive.com/elecraft@mailman.qth.net/msg27397.html It's a long thread. I recommend skipping down if you're in a hurry to read the post by David, M0DHO:

Re: [Elecraft] K2 SSB Power Overshoot on First Syllable

This is all, unfortunately, in the proprietary part of the K2, the firmware. The K2 doesn't have a gain calibration tables, and I'm not sure if it even saves gain settings between transmissions. With CW it will know that the first transmit level it sees is full power, so my guess is that it

[Elecraft] K2 SSB Power Overshoot on First Syllable

Hello Group: Has anyone ever figured out why the Elecraft K2, either base version or with KPA100 amplifier, has a pronounced power overshoot on the first syllable using SSB. I did an internet search for this problem and did not find a lot of discussion about it. Difficult to use an external high

Re: [Elecraft] K2 SSB adapter problems

Chuck, L34 must have been far out to do that. It is connected right where the IF OUT signal is fed to the AGC, so it must have formed a resonance with C179 which increased the input to the AGC and desensed the receiver. Did you use Spectrogram to adjust L34? It is easily done in CW mode -

Re: [Elecraft] K2 SSB adapter problems

Don, I downloaded the software, and found I could get my SSB OPT1 filter looking great until I turned on the AGC in USB! Well I did solve it. It was a poorly aligned L34 causing the problem. I had read on this list that L34 was very broad and did not do much. Not at all true! Now turning AGC

Re: [Elecraft] K2 SSB adapter problems

Chuck, Your guess that the BFO is positioned inside the filter passbaad is likely correct. Do you have the SSB FL1 filter set to OP1? If not, try that first. Many times the filter on the RF Board (used for more narrow filter settings) becomes VERY wide - much wider than indicated by the

[Elecraft] K2 SSB adapter problems

Hello, I have been working on a new K2 the last couple of months. SN 7927 Yesterday I finished and installed the KSB2 SSB adapter. I have been mostly listening. All seemed normal with receive on 80 and 40 meters, on LSB. But, as soon as I go to USB on any band below 21 mhz, or LSB 21 and

[Elecraft] K2 SSB microphone configuration

I am installing the KSB2 SSB Adapter into my K2 S/N 7809. I have the Elecraft MH4 microphone, which includes 8 jumpers and one 5.6K resistor. My KSB2 manual shows the configuration for the Elecraft MH2 and MD2, and I've read in the MH4 PDF manual that it has the same configuration as the MH2.

Re: [Elecraft] K2 SSB option's RFC1/RFC2 mounting orientation

Jack, BMW Motorcycles From: elecraft-boun...@mailman.qth.net [elecraft-boun...@mailman.qth.net] on behalf of Mark Petrovic [mspetro...@gmail.com] Sent: Monday, April 16, 2018 9:16 AM To: elecraft@mailman.qth.net Subject: [Elecraft] K2 SSB option's RFC1/RFC2

Re: [Elecraft] K2 SSB option's RFC1/RFC2 mounting orientation

Mark, Mount them vertically on top of the board. If you mount them on the bottom, you will have trouble trimming the leads for one thing. When snugging the wires down, tighten the one where the tinned wire lead comes closest to the edge of the crystal case so it can't make contact. If you

Re: [Elecraft] K2 SSB option's RFC1/RFC2 mounting orientation

Hello, speaking about the KSB2, for what i can remember, there a 4 toroid and are all vertical. 73's de IW2NOY Graziano Il 16/04/2018 16:16, Mark Petrovic ha scritto: Hi. As I approach the final steps pertaining to toroids and chokes in assembling the SSB option for the K2, I am reading

[Elecraft] K2 SSB option's RFC1/RFC2 mounting orientation

Hi. As I approach the final steps pertaining to toroids and chokes in assembling the SSB option for the K2, I am reading older messages in the mail archives about RFC1 and/or RFC2 shorting to the adjacent crystal cans. The manual doesn't say, but are RFC1/RFC2 to be installed vertically? The

Re: [Elecraft] K2 SSB crystal filter set lacks calibration value

Mark, The SSB reception will work, but the passband may not be positioned optimally. Same goes for the CW filters, they will work but may not be centered at your desired sidetone pitch. The audio Spectrum analyzer is easy to obtain.  Go to my website www.w3fpr.com and scroll down on the

Re: [Elecraft] K2 SSB crystal filter set lacks calibration value

Thanks, Don. If I lack the spectrum analyzer and noise generator to perform the refinement, what sorts of outcomes can I expect? Will the SSB option work, but sub-optimally? On Fri, Apr 6, 2018 at 8:03 PM, Don Wilhelm wrote: > Mark, > > Assume it is 3.6 for the initial

Re: [Elecraft] K2 SSB crystal filter set lacks calibration value

Mark, Assume it is 3.6 for the initial filter alignment. That can be refined later. if you use an audio spectrum analyzer and a broadband noise generator to properly position the filter passband. 73, Don W3FPR On 4/6/2018 10:13 PM, Mark Petrovic wrote: Hi. My K2 SSB option inventory

[Elecraft] K2 SSB crystal filter set lacks calibration value

Hi. My K2 SSB option inventory correctly has the part number E850006 qty. 7 4.9MHz crystal filters, but the envelope containing the filters has no calibration value recorded on the outside. Is there an easy way to determine what this value should be? Thanks. -- Mark AE6RT

Re: [Elecraft] K2 SSB option problem

Gordon, I don't know how you would use any soundcard data to check that, but if you have an instrument that can extract crystal parameters, that will work.  It is easier to just assume your crystal set is somewhere close to the midpoint, and that is 3.6. When you get it all together, you

Re: [Elecraft] K2 SSB option problem

Don,    Thanks!   There is no number inked on the envelope.   Is there a way using soundcard data to check? Gordon -  N1MGO On 3/21/2018 7:04 PM, Don Wilhelm wrote: Gordon, If there is no number inked in somewhere on that envelope, someone dropped the ball when sorting the crystals. In the

Re: [Elecraft] K2 SSB option problem

Gordon, If there is no number inked in somewhere on that envelope, someone dropped the ball when sorting the crystals. In the absence of a calibration number, assume it is 3.6 - that is the most common. 73, Don W3FPR On 3/21/2018 6:37 PM, Gordon LaPoint wrote: I'm building a K2, and so far

[Elecraft] K2 SSB option problem

I'm building a K2, and so far its working.  I'm now assembling the KSB2 ssb adapter.  In the step where I'm to put in the Filter Crystal set I'm supposed to find a calibration number on the envelope.   the Part number is E850006, the only other numbers on the envelope are: 29870-1  171109   ,

Re: [Elecraft] K2 SSB Monitor

While not exactly what you are looking for in monitoring your output signal, this is the way I set up my audio on my K2. This was published back in May 2009 in QST Hints and Kinks. Many of the new rigs have the capability for one to listen to transmitted audio, for setting up levels,

[Elecraft] K2 SSB MONITOR

I know I'll be told to just buy a K3 or KX3, but I love the K2 and am always looking for ways to improve it. In the menu using SSBA and BAL it's possible to monitor SSB in your headphones. What I'm wondering is if there would be a way to make that feature active when actually transmitting so

Re: [Elecraft] K2 SSB Performance Improvement

Brian, I think Don, W3FPR, answered your question. FYI, My K2 and SSB is a fairly early model from 2001. I did not like the bandwidth and changed it to 2.5khz early on. I believe this was a mod from KI6XX. Don't have those notes handy. Always got many unsolicited good audio reports for many

Re: [Elecraft] K2 SSB Performance Improvement

Thanks Don, Jim and George. I would guess that any method that shapes the audio would have the same desired effect i.e. different mic element, equalizer, etc. Brian KB1VBF Sent from my iPad On Feb 10, 2015, at 1:54 AM, Don Wilhelm w3...@embarqmail.com wrote: Those mods are not 'official

Re: [Elecraft] K2 SSB Performance Improvement

Good question. I've never had any issues with my audio reports, using the Elecraft MH2 mic; in fact all audio reports have been positive. It sounds like these mods are for the Proset K2 Heil mic/headset (I'm not sure which Heil mic element is in this model). There were some K2 mods related

Re: [Elecraft] K2 SSB Performance Improvement

Phil: Yeah my audio reports are fine with the MH2 as well. I'm not looking to widen the K2 bandwidth. Thanks Brian KB1VBF Sent from my iPad On Feb 10, 2015, at 12:57 AM, Phil Wheeler w...@socal.rr.com wrote: Good question. I've never had any issues with my audio reports, using the

Re: [Elecraft] K2 SSB Performance Improvement

Those mods are not 'official Elecraft', but will help in reducing the bass response of the KSB2. That is a good thing with any microphone because the low frequency response just wastes power and does not add much to communications quality. It is applicable for any microphone, not just the

Re: [Elecraft] K2 SSB Performance Improvement

On Mon,2/9/2015 10:28 PM, Brian Denley wrote: Yeah my audio reports are fine with the MH2 as well. Nearly 10 years ago, I worked up some nice improvements to SSB TX that added 6dB of gain to the mic circuit, which improved compression, and tailored the frequency response to remove low end,

Re: [Elecraft] K2 SSB Performance Improvement

Thanks for posting this, Ray. I also was getting those kind of reports on my K2. I was able to get the 1uF electrolytics but was unable to find the 0.1uF. G3RXQ was quick to respond to my email and said that a 0.1uF monolithic could be used instead. The results are great, as confirmed by hams I

Re: [Elecraft] K2 SSB Performance Improvement

George et al: Did Elecraft ever adopt these (or any other) K2 SSB audio changes? Brian KB1VBF Sent from my iPad On Feb 9, 2015, at 10:32 PM, George Winship, NC5G gwwa5...@hotmail.com wrote: Thanks for posting this, Ray. I also was getting those kind of reports on my K2. I was able to get

Re: [Elecraft] K2 SSB Performance Improvement

Very pleased the mods still work ! 73 Stewart G3RXQ On Sat, 20 Dec 2014 22:29:48 -, Ray Collins wrote: Other K2 owners may be interested in this. After getting many reports of poor quality transmit audio with my K2 (using the Proset K2 Heil boom microphone and headset), I carried out the

Re: [Elecraft] K2 SSB Performance Improvement

I use a Heil HC4 (DX) mike element in an upgraded hand mike. I changed the mike gain with a resistor change as per mod. I get very good audio reports - the mike has the 2K boost and the low end cut... built in. I never did the SSB filter upgrade and still running stock serial number 0985 K2...

[Elecraft] K2 SSB Performance Improvement

Other K2 owners may be interested in this. After getting many reports of poor quality transmit audio with my K2 (using the Proset K2 Heil boom microphone and headset), I carried out the modifications described by G3RXQ which increase the lower cut off frequency of the microphone circuit on

Re: [Elecraft] K2 SSB Performance Improvement

On Sat,12/20/2014 2:29 PM, Ray Collins wrote: After getting many reports of poor quality transmit audio with my K2 (using the Proset K2 Heil boom microphone and headset), I carried out the modifications described by G3RXQ which increase the lower cut off frequency of the microphone circuit on

[Elecraft] K2 SSB PTT Switch

Thanks for your input guys, I'll be looking into all or your suggestions. 73, Bryan VE6HBS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

[Elecraft] K2 SSB PTT Switch

Can anyone recommend an appropriate PTT switch for my Heil Proset and K2? 73, Bryan VE6HBS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post:

Re: [Elecraft] K2 SSB PTT Switch

Hi Bryan, Well yes, here: http://www.mcmaster.com/#pedal-switches/=pt2v00 I like the type E under foot switches. Industrial quality and in many cases better that the far more expensive ham foot switches. I have one on the K2 and on the K3 have 2 from a Y

Re: [Elecraft] K2 SSB PTT Switch

Hi I just use the hand PTT switch supplied by Heil works well for me. I use a Heil Proset with the HC 5 insert. 73 Gary G7USC Sent from my iPhone On 14 Dec 2013, at 19:01, Bryan hbsav...@shaw.ca wrote: Can anyone recommend an appropriate PTT switch for my Heil Proset and K2? 73, Bryan

Re: [Elecraft] K2 SSB PTT Switch

@mailman.qth.net Subject: [Elecraft] K2 SSB PTT Switch Can anyone recommend an appropriate PTT switch for my Heil Proset and K2? 73, Bryan VE6HBS __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help

Re: [Elecraft] K2 SSB PTT Switch

The footswitches that I have had the best use from.. are the heavy metal ones used in Communications Centers,with the only failures being the cable from the metal footswitch to the equipment. I've seen this dropped, and of course kicked to no end... but never had a failure.. other than the

Re: [Elecraft] K2 SSB PTT Switch

I've got a real one now, but there was something to be said for a J-38 on a board with the spring screwed way down ... as long as you wore shoes. PTT on some transmitters of the day was good for a moderate toe-jolt if you didn't. :-) 73, Fred K6DGW - Northern California Contest Club - CU in

Re: [Elecraft] K2 SSB option performance penalty?

The two are entirely independent. 73, Wayne N6KR On Oct 22, 2013, at 9:05 AM, Harry Stone harryst...@gmail.com wrote: Pardon me if this is a dumb question, I'm still in the process of building my K2. Is there any CW performance penalty in a K2 with the SSB option installed? The SSB board

[Elecraft] K2 SSB option performance penalty?

Pardon me if this is a dumb question, I'm still in the process of building my K2. Is there any CW performance penalty in a K2 with the SSB option installed? The SSB board has its own filters, correct? Do the existing CW filters remain unchanged? thanx, harry KD0NFY -- Have old memories and

Re: [Elecraft] K2 SSB option performance penalty?

Harry... There is no CW performance penalty when the SSB option board is installed. The filter can be setup for CW independent of the SSB board filter when receiving. The K2 can be configured to use the K2 basic filter in a wide/ssb mode when receiving, but this is a less than an optimal

Re: [Elecraft] K2 SSB option performance penalty?

There's no compromise of CW performance. In fact, it gives you the option of a flatter bandpass if you want a wide CW filter (more than about 1 kHz). On 10/22/2013 9:05 AM, Harry Stone wrote: Pardon me if this is a dumb question, I'm still in the process of building my K2. Is there any CW

[Elecraft] k2 ssb

I have purchased a used k2 which has the ksb2 ssb adapter installed and was used with the elecraft hm 2 which I did not get. I have a kenwood hand mike that came with the kenwood ts590 and am looking for advise configuring the k2 for the kenwood hand mike. Thanks Royce, ke5tc

Re: [Elecraft] k2 ssb

Royce, Remove the left side panel, and you should see a 5.6k resistor soldered between pin 6 and pin 1 of the microphone jack. Lift the resistor from pin 1 and an non-amplified Kenwood microphone should work just fine. If it is an amplified mic, you will have to remove the front panel and

Re: [Elecraft] K2 SSB Audio

Tomy, Remove the right side panel and dress the ribbon cable and the speaker cable up into the space between the top of the Control Board and the KPA100 - get them as far away from the KSB2 board as possible. If that does not correct it, you may need to adjust the BFOs for the FL1 OP1

[Elecraft] K2 SSB Audio

Anyone ever have any problems with muffled audio on SSB with the K2? It seems no matter which K2 I use I keep getting reports sounding like a towel over the mic. I have tried various adjustments but it stays the same. This one I have now has that Mic kit that you can use any mic. I have tried the

[Elecraft] K2 SSB TX audio question

K2 serial number 3600+ using the Heil hand mic that Elecraft sells, also did the KI6WX wide-band mod years ago. When on LSB using the elecraft recommended settings of SSBA of 2-1 and SSBC of 2-1, I get lousy reports that there's too much base in my audio and hams find it hard to hear what I'm

Re: [Elecraft] K2 SSB TX audio question

Ed, Change 2 capacitors on the KSB2 board. C34 to 0.47 uF and C32 to something in the 3300 pF to 5000 pF range. I usually run SSBC at 3-1 and SSBA at 1 with the Elecraft MH2 microphone and it sounds good with those changes made. 73, Don W3FPR On 8/12/2013 6:18 PM, Eddy wrote: K2 serial

Re: [Elecraft] K2 SSB TX audio question

Don Changing those two caps changes the audio or band width of the signal? Thanks Gerald. On Aug 12, 2013 6:41 PM, Don Wilhelm w3...@embarqmail.com wrote: Ed, Change 2 capacitors on the KSB2 board. C34 to 0.47 uF and C32 to something in the 3300 pF to 5000 pF range. I usually run SSBC at

Re: [Elecraft] K2 SSB TX audio question

The reason I ask is that I get reports of very narrow audio when monitored by someone with a band scope. They saw between 2 and 2.5 , where most everyone else runs 3 to 3.5 Thanks Gerald On Aug 12, 2013 6:41 PM, Don Wilhelm w3...@embarqmail.com wrote: Ed, Change 2 capacitors on the KSB2

Re: [Elecraft] K2 SSB TX audio question

It reduces the low frequency energy getting to the speech compressor on the KSB2 board. 73, Don W3FPR On 8/12/2013 9:59 PM, Gerald Manthey wrote: Don Changing those two caps changes the audio or band width of the signal? Thanks Gerald. On Aug 12, 2013 6:41 PM, Don Wilhelm w3...@embarqmail.com

Re: [Elecraft] K2 SSB TX audio question

That sounds like the BFOs for the OP1 filter in SSB FL1 are not aligned properly. See part 3 of the K2 Dial Calibration article on my website www.w3fpr.com 73, Don W3FPR On 8/12/2013 10:02 PM, Gerald Manthey wrote: The reason I ask is that I get reports of very narrow audio when monitored

Re: [Elecraft] K2 SSB audio problem(an update)

George, Do you have the updated shield on that KPA100? Shield over the speaker magnet and a narrow notch at the SO-239 jack and solder lugs to directly connect the SO-239 jack to the outer surface of the shield. If you have all those, there should be no change in the K2 behavior when

Re: [Elecraft] K2 SSB audio problem(an update)

Don, Yes, installed the updated shield and the KPA100 upgrade mods in 2010. A to B mods on the K2 were done in 2003. Also, did the SSB mod to broaden the bandwidth to 2.5 KHZ back then also. 73, George, NC5G George, Do you have the updated shield on that KPA100? Shield over the speaker

Re: [Elecraft] K2 SSB audio problem(an update)

After some extensive on the air testing with my Son, this is what we have found. One by one I eliminated pieces of equipment starting with the KPA500, then the KAT100, followed by removing the KPA100 from the K2, then changing power supplies, hooking the basic K2 to the 2.5A ps that I power the

Re: [Elecraft] K2 SSB audio problem

Hi George, I have a similar set-up, having added the KPA500 two or so weeks ago. Recently a local ham using an SDR as a spectrum analyser notied that I have a lot of splatter on my signal. The KPA500 is locted about 8 inches above the K2 and KPA100. I have not fittted the VCO Shield. Thanks to

Re: [Elecraft] K2 SSB audio problem

My experience with the K2 and the much smaller transformer in an antenna rotor control lead me to believe that it is very likely that the big transformer in the KPA500 is FM-ing your K2. The VCO shield kit is likely to solve this problem. On 10/22/2012 3:53 AM, VK1OO, Mike Walkington wrote:

Re: [Elecraft] K2 SSB audio problem

You are probably right, Vic. Per Don's suggestions, I will do some more tests, but it will probably be this weekend before I get to play radio again. I will post what I find out. 73, George, NC5G My experience with the K2 and the much smaller transformer in an antenna rotor control lead me to

[Elecraft] K2 SSB audio problem

After 11 years of operating and many unsolicited reports of great audio, I am suddenly getting not so good reports from my K2/100. Present setup is K2/100, KAT100, KPA500, and resonant antennas on 75 and 40 meters. Very rarely do SSB on any other bands. Stations seem to have trouble describing the

Re: [Elecraft] K2 SSB audio problem

George, Ask yourself what has changed between good operation and now. Have you re-arranged your shack? The K2 is sensitive to devices with transformers positioned within 2 feet of the left side panel - the transformer's magnetic field modulates the K2 VFO. As a test, move your K2 away from

Re: [Elecraft] K2 SSB audio problem

FETS in low power amplifier? David KD4NUE Sent from my Verizon Wireless Phone - Reply message - From: George Winship, NC5G gwwa5...@hotmail.com Date: Sun, Oct 21, 2012 22:48 Subject: [Elecraft] K2 SSB audio problem To: elecraft@mailman.qth.net After 11 years of operating and many

Re: [Elecraft] K2 SSB question.

I agree with Jim, KL7CC. I recently completed the KSB2 module for my K2 (S/N 5995) and I also use a Kenwood MC-43 hand mic. I even received unsolicited positive comments on my TX audio quality in a recent SSB contest that I participated in. I believe that there may have been some issues

[Elecraft] K2 SSB question.

Hello, I would like some suggestions regarding getting a K2, or not. I am new to Ham radio and just built a K1. So, as far as CW is concerned, I am all set. I also just built the 4-band module, and have the components to turn my other board into an 80/17m. So, getting a K2 for me would

Re: [Elecraft] K2 SSB question.

Gil - I am sure you will get other replies, but here's my 2-cents worth: I have owned a K2 since about 2005, and while it is not my primary rig, I have used it enough to get a good feel for how it stacks up when using SSB. I use a Kenwood MC-43 hand microphone with the K2. I have also

[Elecraft] K2 SSB Mods

Earlier this week, mention was made of the K2 SSB Mods at http://www.qrpproject.de/Media/pdf/SSBModsUK.pdf I'm about to install the KSB2 in my Serial # 7235 K2. Once I've confirmed that the unit works OK per the construction manual, should I install the above mods as a matter of course? I do

Re: [Elecraft] K2 SSB Mods

George, If you are using the Elecraft MH2 (or Proset-K2) or other high output electret type microphones, then you do not need those mods. If you will have the KPA100, then the mods are not needed. If you will be operating the K2 as a QRP SSB transceiver and will be using a lower output

Re: [Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc.

. Thanks and 73, Andreas, KU7T -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Saturday, December 31, 2011 4:17 AM To: Andreas Hofmann Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc. Andy, I assume you have

Re: [Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc.

, Andreas, KU7T -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Saturday, December 31, 2011 4:17 AM To: Andreas Hofmann Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc. Andy, I assume you have the K2

Re: [Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc.

. Thank you so much for your help. Andreas, KU7T -Original Message- From: Don Wilhelm [mailto:w3...@embarqmail.com] Sent: Wednesday, January 04, 2012 2:38 PM To: Andreas Hofmann Cc: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc. Andreas

Re: [Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc.

Andy, I assume you have the K2/100 rather than the K2/10. The KPA100 can couple into the KSB2 board giving audio distortion. Remove the right side panel and tuck the ribbon cable and speaker cable up into the space between the KPA100 and the top of the Control Board. Mods to increase the

[Elecraft] K2 SSB audio distorted. Realignment, MIC gain mod etc.

Hi I have SN 2555 and have exclusively used it for CW. Now, I am trying to use it for SSB, but I am getting reports of distortion. Even with SSBA 1 and SSBC 1:1. If I speak really quietly, with microphone about 10 inches away, the distortion is manageable but not fully gone. ALC seems to go a

[Elecraft] K2 SSB wider filter mod

Hi Folks, I am not happy with the original 2.2khz ssb filter in my K2 (serial 1926). It sounds very restricted and fine tuning the BFO setting is quite critical and tx audio ends up either too bassy or too toppy. I'm thinking of fitting the wider ssb filter mod kit . That's the replacement

Re: [Elecraft] K2 SSB wider filter mod

See below. 73, Bill K9YEQ -Original Message- Has anyone done this ? [WRJ] YES!! If so - are you glad that you did or do you wish you had never tried ?[WRJ] I am glad!! 73, Vic GW4JUN __ Elecraft mailing list Home:

Re: [Elecraft] K2 SSB wider filter mod

When I ordered a KPA500, I also ordered the capacitor and crystal kit to do the wide band SSB mod on my K2. I plan to do the mod tomorrow (13th Dec) and will let you know how I feel it worked out, both from the point of view of the mod itself and audibly. My K2 has already had the 2nd filter

Re: [Elecraft] K2 SSB wider filter mod

...@mailman.qth.net] On Behalf Of Vic Sent: Monday, December 12, 2011 9:18 AM To: Elecraft@mailman.qth.net Subject: [Elecraft] K2 SSB wider filter mod Hi Folks, I am not happy with the original 2.2khz ssb filter in my K2 (serial 1926). It sounds very restricted and fine tuning the BFO setting is quite critical

[Elecraft] K2 SSB wider filter mod

I just did it. You can do 2.4 or 2.6. I chose the 2.4 for my K2. Am getting good reports and rcv works FB. You really need to do the allignment with Spectrogram to get it right. 73 George/W2BPI __ Elecraft mailing list Home:

Re: [Elecraft] K2 SSB wider filter mod

My understanding is that owners of relatively new K2s have the 2.4 KHz bandwidth if they have the KSB2 board. It's older K2s +KSB2s that came with the narrower 2.1 KHz BW. Brian KB1VBF -- View this message in context:

Re: [Elecraft] K2 SSB wider filter mod

Message- From: bdenley Sent: Monday, December 12, 2011 6:31 PM To: elecraft@mailman.qth.net Subject: Re: [Elecraft] K2 SSB wider filter mod My understanding is that owners of relatively new K2s have the 2.4 KHz bandwidth if they have the KSB2 board. It's older K2s +KSB2s that came

Re: [Elecraft] K2 SSB wider filter mod

The crystals used in the filters vary somewhat within the parameters set by Elecraft. Indeed, I believe Elecraft tightened up the parameters somewhat a number of years ago. The bottom line is that they do vary from filter to filter. Checking with Spectrogram is an excellent idea. I found that my

[Elecraft] [K2] SSB Failure

I bought a used K2/100, at the end of last year. (Serial 5540 - K2 MCU 2.04P, K2 IOC 1.09, KSB2 1.08, KPA100 1.10). I mostly use CW but do need SSB at times. SSB had been working fine but recently RF output starts out fine - folks reply to my calls - but it then fades out to zero after

Re: [Elecraft] [K2] SSB Failure

[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of W4CU Sent: Monday, March 28, 2011 8:56 AM To: elecraft@mailman.qth.net Subject: [Elecraft] [K2] SSB Failure I bought a used K2/100, at the end of last year. (Serial 5540 - K2 MCU 2.04P, K2 IOC 1.09, KSB2 1.08, KPA100 1.10). I mostly use

Re: [Elecraft] [K2] SSB Failure

Tom, My first suspicion is that the ALC is continually building as you speak. You should be able to confirm that by switching the LED bargraph display to indicate ALC - if the ALC meter does decrease between voice peaks, but slowly builds up, you should see it on the bargraph. A bad solder

Re: [Elecraft] K2 SSB Receive issue

The USB and LSB BFO for each filter was almost identical to each other. I used the BFO numbers in the K2 SSB manual as a starting point and used spectrogram to fine tune the filters. I am now able to receive readable SSB on all bands. I knew it was something I overlooked. Thank you for your help.

[Elecraft] K2 SSB Receive issue

I recently finished aligning my K2 with the spectrogram software and with the procedures from Elecraft. I am able to receive SSB on all bands except on 21m and 12m. The SSB signal is very distorted and sounds like the filter is not wide enough to receive the SSB signal. I completed all of the

Re: [Elecraft] K2 SSB Receive issue

I am going to make 2 assumptions - correct me if they are wrong. 1) You do not have the KSB2 installed with its fixed 2.4 kHz width filter, and you are attempting to use the variable IF filter at wide widths. 2) Your K2 has a serial number somewhere near 6800. If those conditions are true, the

Re: [Elecraft] K2 SSB Receive issue

I am sorry I should have mentioned I have the KSB2 SSB board installed. I followed the K2 Dial calibration procedures on your website to verify everything is aligned properly and it is. I checked for SSB reception on 21m and 12m and the SSB audio is still distorted. All other bands work below

Re: [Elecraft] K2 SSB Receive issue

This may or may not be relevant but low side mixing is used on 15m, 12m and 10m where distortion is heard, and high side mixing on the lower frequency bands where distortion is not heard. 73, Geoff GM4ESD KA1YMX wrote on Saturday, January 15, 2011 at 9:04 PM: I am sorry I should have

Re: [Elecraft] K2 SSB Receive issue

I shouldn't have used the word distortion. The SSB stations are completely unreadable, very similar to a narrow filter. -- View this message in context: http://elecraft.365791.n2.nabble.com/K2-SSB-Receive-issue-tp5925220p5925482.html Sent from the [K2] mailing list archive at Nabble.com.

Re: [Elecraft] K2 SSB Receive issue

Is your reference to 21m a typo instead of 20m, or are you referring to the 21 MHz band which is 15m. Are you choosing USB for the 20m, 17m, 15m, 12m and 10m bands?. How does the LSB signals on 80m and 40m sound? The sideband inversion Geoff mentioned is such that on 15m, 12m and 10m, the

Re: [Elecraft] K2 SSB Receive issue

I used my K3 to transmit a USB/LSB on all bands except for 10m. The only two bands that I could receive a readable SSB signal was on 20m and 17m. I tried USB and LSB on all other bands and could not receive a readable signal. I used my S-Meter to adjust the frequency on the signal in which I did

Re: [Elecraft] K2 SSB Receive issue

Go back to the filter alignment and look at the BFOs for each filter (you may look either at the DAC values or at the frequency). If the settings for LSB are the same as you have for USB, then you have the BFOs set to the wrong sideband. Use 40 meters for this test so there is no confusion

[Elecraft] K2/SSB with installed K6XX CW Indicator

Hello Elecrafters, A friend told me that if I install the K6XX CW Indicator in my K2, the display will also blink in SSB mode. My question: Is there a way or a modification which would de-activate the indicator when working in SSB mode? 73 de Pierre VE2PID K2 # 5170 KX1 # 441

[Elecraft] K2 SSB Adjustments?

I built and installed the KSB2 into my K2 awhile ago, rarely use it. Today, used it for SS on 15M and it seemed to work OK. But, with power setting much above 5W, would get the Hi Cur warning. SSBA is 1, SSBC is 2-1, and microphone is Elecraft MH2. Is there a better way to optimize the

Re: [Elecraft] K2 SSB Adjustments?

Curt, The answer is yes, although I suspect that you are not going to like it. If you are getting Hi Cur warnings on SSB, I suspect that you have something wrong on CW as well. normally HiCur warnings are associated with T4 or the Low Pass Filter - or low power supply voltage. Is this

Re: [Elecraft] K2 SSB Adjustments?

Curt, Do you have any mods installed on the KSB2 - most particularly the KI6WX Increased SSB RF Gain mod? That mod requires changes to the KSB2 ALC circuit which were not known when the original mod was documented. 73, Don W3FPR On 11/21/2010 8:59 PM, Curt wrote: I built and installed the

Re: [Elecraft] K2 SSB ALC Problem

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

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 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:

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