[Elecraft] OT Heath
Quite a few hams boast an old Heathkit equipment, transceiver or accessory, that they proudly display on a shelf of their shack, or occasionnaly still use You surely know that Edward Heath, who started the Heath Company around 1900, created aeroplane kits first ? There's still one flying*, restored in 2000. It's at Brodhead, Wisconsin, owned and piloted by Chris Price...There are also many vintage planes, all flying on this airfield. Sorry to be OT...but this could have interested somebody. 73 Jacques References ; French Air Magazine " Le Fana de l'Aviation" July 2006 p. 56/63 with a gorgeous double-page photo of the Heath Parasol On the web : All about Heathkit history, Brodhead plane collection, etc... ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] 8R hold question
Hi, The K2 manual says to use "8R hold" to "improve" amplifier keying. It appears that this is to prevent a mechanical relay in an amp from cycling too frequently with the K2's QSK. Is 8R hold necessary with PIN diode switched amps like the Alpha? Enabling 8R hold in my K2 introduces a slight popping into the T-R switching as the rig returns to receive. This degrades the otherwise nearly flawless break-in. It would certainly be preferable to leave 8R in the normal setting if this does not introduce keying problems. 73, Larry, K0RS Don't pick lemons. See all the new 2007 cars at Yahoo! Autos. http://autos.yahoo.com/new_cars.html ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] 8R hold question
Larry Clark wrote: Hi, The K2 manual says to use "8R hold" to "improve" amplifier keying. It appears that this is to prevent a mechanical relay in an amp from cycling too frequently with the K2's QSK. Is 8R hold necessary with PIN diode switched amps like the Alpha? Enabling 8R hold in my K2 introduces a slight popping into the T-R switching as the rig returns to receive. This degrades the otherwise nearly flawless break-in. It would certainly be preferable to leave 8R in the normal setting if this does not introduce keying problems. There's no mechanical relay in the t/r path. You don't need to use 8R hold with an Alpha -- I used it both ways with an Alpha 86 that was pin diode switched. There's enough delay built into the amplifier keying circuit. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: OT Other kits
Mark this: Thursday 1 February 2007 = Happy Hour at Elektor Download your favourite Elektor articles for free! No matter if you're using a pencil and an old-fashioned diary, a Post-It sticky note on the fridge door, a PDA or Outlook's calendar function, we believe everyone should mark February 1, 2007 as a special date. On that day, from 9.00 am till 9.00 pm GMT our internet servers are ready to supply a selection of 25 top ranking articles from Elektor Electronics magazine, all free of charge. Join the Happy Hour crowd and save up to £25! This may have already been posted as I receive the list as a grouping. If not.. a nice savings!!! 73, Roger WA7BOC K2 #755 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS KPA100 & KAT100 in EC2
I HAVE FOR SALE KPA100 & KAT1OO IN EC2 . BUILT 2 YEARS AGO AND IS IN EXCELLENT WORKING CONDITION . IF YOU HAVE A K2 WITH A KIO2 (RS232) PORT ITS PLUG AND PLAY. CABLE INCLUDED, WILL ALSO WORK EVEN IF YOU HAVE KAT2 TUNER IN YOUR K2. WHEN CABLE IS PLUGED IN KAT2 IS TURNED OFF AND KAT100 IS ON. UNPLUG CABLE AND TURN KAT2 BACK ON. IF YOU ARE INTERESTED PLEASE EMAIL ME AT; [EMAIL PROTECTED] If you would like to see pictures go to http://web.mac.com/w9lr/iWeb/Site/Library.html Current Elecraft prices for KIO2, KPA100, EC2, KAT100, & cable is 747.00 WILL SELL FOR 470.00 plus shipping Bill W9LR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KPA100 & KAT100 For Sale
Hi all, I lost the email that was just sent to me by someone ??? who's first name is Bill IF your name is Bill and you emailed me at [EMAIL PROTECTED] about my KPA100 & KAT100 please email again Thanks Bill W9LR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS KPA100 & KAT100
ITS SOLD, Bill W9LR ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FSK on a K2?
Hi folks, I'm thinking of getting a MicroKeyer from MicroHam for my K2. One of the attractions is that it claims I can run FSK RTTY instead of AFSK. Really? I don't find any mention of FSK with a K2 in anything I've read...so either I don't know enough about FSK or I don't know enough about my K2. How do you do FSK on a K2? I'd also be interested in hearing from anyone using a MicroKeyer with their K2. Thanks and 73, Ken Alexander, VE3HLS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] RTTY FL Settings
On Dec 20, 2006, at 12:08 PM, Bernard Gaffney, N8PVZ/QRP wrote: I want to set up the RTTY FL filter settings for use with PSK31/63. As a good starting point, I assume the RTTY settings should be set to match the SSB settings. You should have the at least one filter set to the OP1 filter. Same for the BF settings? No problems experienced using SSB for PSK. There are a couple of benefits to using the RTTY filters instead of the SSB: 1) You can set the variable bandwidth filter centered around RTTY (or PSK) frequencies, settings that wouldn't make sense for copying SSB. 2) the audio compression settings are separate for RTTY and SSB. So, if you set the SSBC value for one mode, you can set it to 1:1 for RTTY. Currently, my FL settings are: SSBRTTY FL1 OP12.20 FL2 OP12.00 FL3 1.80 1.80 FL4 0.75 1.60 This doesn't make much sense to me. You're using the variable- bandwidth filter for all three RTTY filter settings. Unfortunately, the VBF has a very asymmetric response at bandwidths greater than about 1.0 kHz. I set up my RTTY filters as follows FL1 OP1 FL2 1.0 FL3 0.5 FL4 0.3 All the variable bandwidth filters are centered on 1500 Hz (1415 Mark, 1585 Space). RTTY REV is set up the same way for use with PSK. I try to pick PSK frequencies near 1500 Hz. The nice thing about this set up is that the FL1 filter is set wide, FL2 is narrow enough to tune RTTY stations, FL3 and FL4 can be put in to really block out adjacent QRM. Also, when switching to RTTY, does that imply I'm using the SSBCr setting? Yes. I may of course have to tweak the settings as I go along. I wouldn't suggest using the VBF at bandwidths wider than about 1.2 kHz. Once the filter stops being a single peak with smooth slopes, you might as well go to the OP1 filter. Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] OT: FS Vibroplex "Original Deluxe"
For sale: Vibroplex model "Original Deluxe" with serial # in the 200,000's that dates it to 1962. It is in very good condition and a well constructed homebrew felt lined wooden carrying case is included. Asking $125.00 shipped to anywhere in the US. Outside the US will require extra postage and the recipient will be responsible for customs duties and VAT if applicable. Pix can be viewed at http://members.cox.net/asheldon/vibroplex1.jpg http://members.cox.net/asheldon/vibroplex2.jpg and http://members.cox.net/asheldon/vibroplex3.jpg I'll take certified check, money order or PayPal Please email off the reflector if interested. Aubrey J. Sheldon 2029 East Evanston Dr. Park City, KS 67219 Cum catapultae proscriptae erunt tum soli proscripti catapultas habebunt. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] SKN - REPORT YOUR RESULTS!
On Jan 1, 2007, at 6:54 PM, [EMAIL PROTECTED] wrote: Now that SKN is over, please report your results to ARRL ASAP. There's a short deadline to report. An entire month is not a short deadline. I operated SKN. You can find my notes in the Soapbox. I used my K2/100 for receive, but my transmitter was a homebrew 6CL6 Osc / 6146 PA crystal-controlled rig. What fun! Bill Coleman, AA4LR, PP-ASELMail: [EMAIL PROTECTED] Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] OT: FS Vibroplex "Original Deluxe"
Jim Sheldon wrote: For sale: Vibroplex model "Original Deluxe" with serial # in the 200,000's that dates it to 1962. Without knowing Jim or his bug, let me say that this is a very good year for Vibroplex Originals. Vibroplex used various thicknesses of metal for the mainsprings, and the thinner ones are capable of working smoothly at lower speeds than the thicker ones. In the early '60's they used springs as thin as 0.0125" (if I recall correctly), while immediately earlier and later bugs used springs as thick as 0.018". Get out your micrometers! In any event, if I didn't already have a 1962 OD, this is one I would be interested in. -- 73, Vic, K2VCO Fresno CA http://www.qsl.net/k2vco ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] FS: OT: Vibroplex "Original Deluxe" SOLD!
The key has been sold. - Going to KH6 land. W0EB Cum catapultae proscriptae erunt tum soli proscripti catapultas habebunt. (When catapults are outlawed, only outlaws will have catapults!) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
Re: [Elecraft] FSK on a K2?
Hi Mark, The main benefit to FSK seems to be not having to fiddle with audio levels to and from the computer, which are constantly being changed depending on what I'm doing with the computer. Other than that I don't think there's any functional difference between FSK and AFSK. I went back to the MicroHam website and had a look at the schematics for the cables they provide for other transceivers (something I should have thought of before) and I see that they show a dedicated FSK line going to a multi-pin plug on some of the Icom cable sets. So, I guess the MicroKeyer provides the capability for FSK on rigs that have FSK inputs like your '820, but not on the K2. That is unless they do some fancy tricks on the KIO2 line, which doesn't seem likely. Thanks for your help! 73 - Ken --- "Mark J. Schreiner" <[EMAIL PROTECTED]> wrote: > Some radios, back in their day, not sure about > modern ones, had an input > for RTTY. It was a stereo plug or something > similar. Sort of worked > like paddles do, but one side was for Mark and one > for Space. I > remember my TS-820S had that. Got me curious, so I > just took a look, it > was actually a 1/4" stereo jack on the upper right > corner of the rear > chassis and labeled RTTY Key, right next to a > similar jack labeled CW > Key. The radio had a fixed frequency shift (maybe > was selectable from > under the covers for a couple of different > standards) so that the Mark & > Space would automatically frequency shift the proper > amount when keyed > with the correct interface. No, your K2 doesn't > have that, so AFSK is > the method used for your K2. If you get responses > otherwise, let me > know, though, however I am not sure I even could > find any hardware to > drive the Mark/Space correctly anymore! Oh, I guess > the MicroKeyer > would, hence the purpose of your email, DUH! > > I'm not sure if there are any benefits to hardware > FSK versus AFSK. The > "A" is really a method as they are both "FSK" > regardless. It seems like > the benefit for AFSK would be the versatility and > many software programs > out there now that use a computer and soundboard to > give the proper > audio signals fed into your microphone connector to > generate a multitude > of modulation schemes from PSK31 and PSK63 to RTTY > to Hellschreiber, and > so on. Used to be different hardware solutions > required for different > modes, now it is all done with computer and sound > card. > > So, if interested, I have an old TS-820S for you to > try if you would > like to do "true FSK" instead of plain old "AFSK", > just let me know! > > Mark, NK8Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
RE: [Elecraft] FSK on a K2?
FSK is FSK. That means the frequency of the signal shifts to encode the data. The only difference is in how the FSK is created. Half a century ago FSK was generated by shifting the frequency of the oscillator that determined the transmitter's frequency. The usual approach was to use a reactance tube or even a relay to switch a capacitor or inductor in and out of the oscillator that shifted the frequency of the oscillator slightly. (Think of very slow frequency modulation ). The K2 is not designed for that form of FSK (or frequency modulation either). Indeed the whole design is to prevent such frequency shifts because, when they happen very slowly, we call it "drift"!! But, by driving the K2 in SSB mode with an audio tone, the K2 generates essentially *one* RF frequency: the carrier offset by the tone either above (USB) or below (LSB) the carrier frequency. By shifting the audio tone the one RF frequency produced by the K2 shifts accordingly. This produces FSK that, at the rig's output, is exactly the same as that produced by the old rig's shifting oscillator. At the receiving end, nothing has changed. In the old days an FSK signal was received and the beat-frequency oscillator (which made a CW signal audible as a tone) was adjusted so you'd hear in the speaker an audio tone that shifted in frequency. In modern rigs designed for SSB, the product detector produces those tones as well. There is *no* difference between the audio output of a K2 listening to another K2 develop FSK using SSB mode and the audio output of a 1950's receiver listening to a 1950's transmitter producing FSK by shifting the oscillator frequency. AFSK, Audio Frequency Shift Keying, is something quite different. It was commonly used on VHF/UHF half a century ago and some use might still exist today. It had a huge advantage for VHF/UHF because it did not require a very stable transmitter or receiver. In the 1930's, through perhaps the 1970's it was enough of a challenge to produce a stable enough carrier frequency on the HF bands for critical tuning, much less on VHF or UHF. So, up on the higher frequencies it was common to us an AM transmitter. The AM transmitter produced a carrier and two sidebands just like a conventional SW broadcaster or any broadcast band AM station does today. When tuning across such a station, the only thing that changes is the strength of the signal. Unlike SSB, tuning across an AM signal does not cause the modulation tones to shift. A 1 KHz tone modulating an AM signal will be a 1 kHz tone at the receiver, no matter the tuning. For that reason AFSK was very popular on the higher frequencies back then. Conventional transmitters and receivers which might drift hundreds of Hz during a single transmission could be used easily to receive radio teletype (RTTY) using AFSK. Today, some folks mistakenly call what we do on the HF bands with an SSB rig (like a K2 equipped with the SSB module) "AFSK". They are partially right. The output of their source, usually a computer, is an audio tone that shifts in frequency. But their rigs produce true FSK as a result: an RF frequency that shifts according to the modulation. So the way to do FSK on a K2 is to develop audio tones within the normal voice bandpass of 300 to about 2.1 KHz whose separation is equal to the shift you need in frequency. Apply those to the K2's mic input and it'll produce a shifting RF output or FSK. Today, those tones normally come from a PC or special controller of some sort. Ron AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken Alexander Sent: Wednesday, January 31, 2007 6:46 PM To: Elecraft Subject: [Elecraft] FSK on a K2? Hi folks, I'm thinking of getting a MicroKeyer from MicroHam for my K2. One of the attractions is that it claims I can run FSK RTTY instead of AFSK. Really? I don't find any mention of FSK with a K2 in anything I've read...so either I don't know enough about FSK or I don't know enough about my K2. How do you do FSK on a K2? I'd also be interested in hearing from anyone using a MicroKeyer with their K2. Thanks and 73, Ken Alexander, VE3HLS ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Transmitter alignment
So, I'm finally getting to the transmitter alignment section on K2 #5945. With a dummy load, I set power on 40M to 2W, and go into tune mode. I can never get more than about 0.4W on the K2 display, and my wattmeter barely moves, which would jive with that also. Moving L1/L2 through their full range has no effect, the power fluctuates between 0.2 and 0.4W regardless. It's the same on all bands. Current draw is about 0.75A in tune mode. I had previously aligned the receiver, and the reciever was listening nicely on 40M. Going through the troubleshooting section, I can't find any problems with the suggested troubleshooting points. One thing that struck me as wierd, is that the two 1% resistors that Troubleshooting refers to (1.5k and 226 ohm), I think R66/67 (?) both read 195 ohms, but they are the correct color code and I confirmed that I checked them before installing. It appears strange to me because the other resistors read correctly while installed, but these do not. So, perhaps this is my problem? Any ideas? Thanks, Jeff ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] Re: Transmitter alignment
Oh, and I have checked, and C167 is indeed installed. :) On Wed, Jan 31, 2007 at 11:45:54PM -0500, Jeff Kinzli wrote: > So, I'm finally getting to the transmitter alignment section on K2 #5945. > > With a dummy load, I set power on 40M to 2W, and go into tune mode. I can > never get more than about 0.4W on the K2 display, and my wattmeter barely > moves, which would jive with that also. Moving L1/L2 through their full range > has no effect, the power fluctuates between 0.2 and 0.4W regardless. It's the > same on all bands. > > Current draw is about 0.75A in tune mode. > > I had previously aligned the receiver, and the reciever was listening nicely > on 40M. > > Going through the troubleshooting section, I can't find any problems with the > suggested troubleshooting points. > > One thing that struck me as wierd, is that the two 1% resistors that > Troubleshooting refers to (1.5k and 226 ohm), I think R66/67 (?) both read > 195 ohms, but they are the correct color code and I confirmed that I checked > them before installing. It appears strange to me because the other resistors > read correctly while installed, but these do not. So, perhaps this is my > problem? > > Any ideas? > > Thanks, > Jeff ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
