Re: [Elecraft] XTAL AND DSP simply is the best design
I remember I had one of the first of those external rf clipper processors about 20 years ago... it was called Com-something. They used an if of about 50 kHz, with LC filters... it worked amazingly well and was sought after by DXers and contesters. Larry N8LP [EMAIL PROTECTED] wrote: You look at the TS-870, 746pro, and many other DSP rigs all make the same stupid design flaw. Dual conversion DSP! No multiple pole xtal filter. No computer algorythm can emulate a multipe pole IF filter. These are your $2000-$3000 rigs The TS-850 had dual xtal IFs. However there was much junk from all the CPU's and yes up conversion, then downconversion and demod after the 2nd IF filter adds to the noise floor. How the R-7A did it was interesting. A 4 pole Fixed Xtal filter followed the upconverter. It has a pass band of 12kcs. That's right a 12Khz wide IF. This gives this collectors radio its used price tag of $2000. The 2nd IF used those 8 pole can filters. I found the K-2 has crystal clear SSB with the 1.8khz filter position. The R-7A the SSB gets muffled at 1.8khz. I use 1.8 khz only on the K2. The TR-7 used a 2 pole filter after up conversion. If you look at the schematic of the TS-850, you see the dual IFs are in the back of the receiver. So after upconversion the passband is 50kc wide. That is a large window for synth junk to get in. HOWEVER IF YOU USE CW filters in both IFs, your CW reception will be as good as a K2 The K2 wisely put much non xtal filtering right after the antenna jack. The band pass filters are wide enough for the Ham bands and very little general coverage. You lose general coverage ability of an R-7A. However do you really need a short wave rcvr in a ham rig? So yes one can compare the K2 with up to $3000 dollar rigs. However on SSB TX the K2 comes up average. It is average because the SSB adapter is a simple design. The all important audio chain is mostly in 2 chips. However I always get good audio reports. A RF proc of the TS-850's design would make the K2 rock. There is a cheap way of doing this. There are a few speech procs that go between the mic and rig. They are true RF procs. Your audio is up converted to 500kc. The 500Kc RF is processed by using an AGC like amp. At the RFstage more compression can be used with out AUDIO DISTORTION. Any RF clipping by products are filtered out. The DSB signal is then down converted back to audio with the exact same phase it entered the device. So one is feeding in audio that was RF processed. One can use up to 12db of RF processing. Audio processing gets distorted after 6db. One company makes this device for $60. It can be put in the mic or in the rig. I am ordering one. I will give on air checks for those that want too. ___ 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
Re: [Elecraft] XTAL AND DSP simply is the best design
A British company called Datong brought out an RF clipper a few years back. It used active filters to tailor the mic audio then CMOS switches to produce a DSB signal at 50kHz, diode clip it, and demod it back to audio. They made 3 products - an upmarket one with switches to select the clip level, one with pots on the front panel, and a board to fit in any suitable box or TX. It worked like a champ. They are still available on the second user market. I believe that a company in Germany now does an updated version. RF speech clipping is the most effective simple audio processing as it does not produce in-filter distortion products, unlike clipping at audio base band. 73 Stewart G3RXQ On Fri, 04 Mar 2005 03:33:31 -0500, Larry Phipps wrote: I remember I had one of the first of those external rf clipper processors about 20 years ago... it was called Com-something. They used an if of about 50 kHz, with LC filters... it worked amazingly well and was sought after by DXers and contesters. Larry N8LP [EMAIL PROTECTED] wrote: You look at the TS-870, 746pro, and many other DSP rigs all make the same stupid design flaw. Dual conversion DSP! No multiple pole xtal filter. No computer algorythm can emulate a multipe pole IF filter. These are your $2000-$3000 rigs The TS-850 had dual xtal IFs. However there was much junk from all the CPU's and yes up conversion, then downconversion and demod after the 2nd IF filter adds to the noise floor. How the R-7A did it was interesting. A 4 pole Fixed Xtal filter followed the upconverter. It has a pass band of 12kcs. That's right a 12Khz wide IF. This gives this collectors radio its used price tag of $2000. The 2nd IF used those 8 pole can filters. I found the K-2 has crystal clear SSB with the 1.8khz filter position. The R-7A the SSB gets muffled at 1.8khz. I use 1.8 khz only on the K2. The TR-7 used a 2 pole filter after up conversion. If you look at the schematic of the TS-850, you see the dual IFs are in the back of the receiver. So after upconversion the passband is 50kc wide. That is a large window for synth junk to get in. HOWEVER IF YOU USE CW filters in both IFs, your CW reception will be as good as a K2 The K2 wisely put much non xtal filtering right after the antenna jack. The band pass filters are wide enough for the Ham bands and very little general coverage. You lose general coverage ability of an R-7A. However do you really need a short wave rcvr in a ham rig? So yes one can compare the K2 with up to $3000 dollar rigs. However on SSB TX the K2 comes up average. It is average because the SSB adapter is a simple design. The all important audio chain is mostly in 2 chips. However I always get good audio reports. A RF proc of the TS-850's design would make the K2 rock. There is a cheap way of doing this. There are a few speech procs that go between the mic and rig. They are true RF procs. Your audio is up converted to 500kc. The 500Kc RF is processed by using an AGC like amp. At the RFstage more compression can be used with out AUDIO DISTORTION. Any RF clipping by products are filtered out. The DSB signal is then down converted back to audio with the exact same phase it entered the device. So one is feeding in audio that was RF processed. One can use up to 12db of RF processing. Audio processing gets distorted after 6db. One company makes this device for $60. It can be put in the mic or in the rig. I am ordering one. I will give on air checks for those that want too. ___ 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 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
R: [Elecraft] K2 S/N 4787 Build In Progress
So I'm not the only one.. What a relief! 73 de Giulio IW3HVB -- Quote: On the front panel board while trying to add SSB components after the fact I managed to slightly burn the edge of a push button. Wish the instructions had mentioned to put the low SSB components in before the higher and vulnerable parts were added. ___ 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] Speech processing
Hi, all concerned: I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100 discrete parts on a 4X6in board. What the device does is to heterodyne baseband audio to vlf, put it through a USB filter, limit it, lowpass-filter it, and heterodyne it to baseband. Inband distortion products are kept down this way. If there's enough interest, it could be resurrected by retrofitting with newer parts, eg, inductors other than telco toroids ;o) and kitted. If anyone knows of contra indications, do please step forward. I've done a cursory search for Comdel and its successors and found nothing except old ads and a review in June 1968 HAM RADIO magazine (it sure was a pleasure to reread some Jim Fisk). I do recall reading that the unwary occasionally fried amps which couldn't stand the increase in average power. Caveat user. If anyone wants to hear what the thing sounds like, I could get on 160-10M ssb once I figure out the internal mic connections to my to K2/100. Fingertalk is much easier, for me in any case. 73, Dave, N3HE ___ 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] 70cm Transverter
Hi, I'ld love to know when and if we can expect the transverter for the 70cm band. Can anyone comment? vy 73 de toby ___ 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
R: [Elecraft] XTAL AND DSP simply is the best design
Yes I can confirm it! I got it abt 15 yaers ago and used and had a great succes in QRP/SSB. I still have it, but now I use just CW and don't use the clipper now. Look for this type and you'll have very good results. Best 72 Alex I0SKK -Messaggio originale- Da: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] conto di Stewart Baker Inviato: venerdì 4 marzo 2005 10.10 A: [EMAIL PROTECTED]; [EMAIL PROTECTED] Cc: elecraft@mailman.qth.net Oggetto: Re: [Elecraft] XTAL AND DSP simply is the best design A British company called Datong brought out an RF clipper a few years back. It used active filters to tailor the mic audio then CMOS switches to produce a DSB signal at 50kHz, diode clip it, and demod it back to audio. They made 3 products - an upmarket one with switches to select the clip level, one with pots on the front panel, and a board to fit in any suitable box or TX. It worked like a champ. They are still available on the second user market. I believe that a company in Germany now does an updated version. RF speech clipping is the most effective simple audio processing as it does not produce in-filter distortion products, unlike clipping at audio base band. 73 Stewart G3RXQ On Fri, 04 Mar 2005 03:33:31 -0500, Larry Phipps wrote: I remember I had one of the first of those external rf clipper processors about 20 years ago... it was called Com-something. They used an if of about 50 kHz, with LC filters... it worked amazingly well and was sought after by DXers and contesters. Larry N8LP [EMAIL PROTECTED] wrote: You look at the TS-870, 746pro, and many other DSP rigs all make the same stupid design flaw. Dual conversion DSP! No multiple pole xtal filter. No computer algorythm can emulate a multipe pole IF filter. These are your $2000-$3000 rigs The TS-850 had dual xtal IFs. However there was much junk from all the CPU's and yes up conversion, then downconversion and demod after the 2nd IF filter adds to the noise floor. How the R-7A did it was interesting. A 4 pole Fixed Xtal filter followed the upconverter. It has a pass band of 12kcs. That's right a 12Khz wide IF. This gives this collectors radio its used price tag of $2000. The 2nd IF used those 8 pole can filters. I found the K-2 has crystal clear SSB with the 1.8khz filter position. The R-7A the SSB gets muffled at 1.8khz. I use 1.8 khz only on the K2. The TR-7 used a 2 pole filter after up conversion. If you look at the schematic of the TS-850, you see the dual IFs are in the back of the receiver. So after upconversion the passband is 50kc wide. That is a large window for synth junk to get in. HOWEVER IF YOU USE CW filters in both IFs, your CW reception will be as good as a K2 The K2 wisely put much non xtal filtering right after the antenna jack. The band pass filters are wide enough for the Ham bands and very little general coverage. You lose general coverage ability of an R-7A. However do you really need a short wave rcvr in a ham rig? So yes one can compare the K2 with up to $3000 dollar rigs. However on SSB TX the K2 comes up average. It is average because the SSB adapter is a simple design. The all important audio chain is mostly in 2 chips. However I always get good audio reports. A RF proc of the TS-850's design would make the K2 rock. There is a cheap way of doing this. There are a few speech procs that go between the mic and rig. They are true RF procs. Your audio is up converted to 500kc. The 500Kc RF is processed by using an AGC like amp. At the RFstage more compression can be used with out AUDIO DISTORTION. Any RF clipping by products are filtered out. The DSB signal is then down converted back to audio with the exact same phase it entered the device. So one is feeding in audio that was RF processed. One can use up to 12db of RF processing. Audio processing gets distorted after 6db. One company makes this device for $60. It can be put in the mic or in the rig. I am ordering one. I will give on air checks for those that want too. ___ 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 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.):
Re: [Elecraft] K2 S/N 4787 Build In Progress
Ron D'Eau Claire wrote: I'm inventorying each board as it is begun. ... At this point capacitors for the RF board are a wild blur. I'm sure I have not correctly identified at least a third of them. Many numbers on the caps are simply not in the parts list. If anyone has a good way to ID them I would be pleased to hear English is not my mother tongue. I am not a technician. However, I managed to identify all the capacitors. Some of them are tiny, you could use magnifier. Remember to check both sides of capacitors. I had some difficulties identifying because I looked another side of capacitors. DVM with a capacitance measuring function. Several resistor packs have not had the right part numbers. So far I've been able to ID them by measureing Right! There were some different numbers. This topic was covered in list archives. Multimeter helped. I had some red resistor packs with wrong numbers when comparing to inventory list. Their resistance was OK. Rolf Moberg (s/n 4759 waiting to be built) oh6kxl ___ 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] FS: K2 4181 FOR SALE
G'morning: K2 #4181 has been sold. Thanks to those who showed an interest 73, Ken K3IU -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Ken K3IU Sent: Tuesday, March 01, 2005 7:07 PM To: 'Elecraft Reflector' Subject: [Elecraft] FS: K2 4181 FOR SALE ___ 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] Speech processing
In a message dated 04/03/05 11:00:07 GMT Standard Time, [EMAIL PROTECTED] writes: I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100 discrete parts on a 4X6in board. --- I have one of the Datong D75 RF speech processors since about 1980 (25 years). The leaflet that came with it shows it as being derived from earlier products, the RFC and the automatic model the ASP, though not sure when these were first on the market. By the time the D75 was introduced the circuitry had been reduced to 7 IC and 2 transistors. Uses the phasing method to generate an SSB signal at 60kHz then clipped before demodulation back to audio. Draws 9mA from a small PP3/6F22 internal 9V battery or can be externally powered from the radio which is what I did with a Yaesu FT707 used at one time. It worked well though the resultant audio quality was not for local usage at higher levels of clipping! What does what inside the box is a mystery as Datong are infamous for not releasing schematics, a policy carried through to this day I found out when trying to obtain circuit information of their DF1 FM RF direction finding system. I have one with a missing head unit and need to get into operation for tracking local morons on the repeaters. A request to Datong who are now in the professional RF surveillance field after pulling out from the amateur market for help and schematic information led to a polite, but firm refusal. The main station HF transmitter in use at this end the JRC NSD-515 (1982 vintage) uses RF clipping in the IF chain with 2 filters cascaded, one either side of the TA7302 clipper IC at 8.7MHz. This works very well with resultant audio quality good enough to leave it in circuit at all times for SSB and just varying the amount of clipping to suit the occasion. A great pity that the K2 does not use something similar with the KSB2, but with available space at a premium, would guess that this would be rather difficult to fit in. Bob, G3VVT ___ 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] Speech processing
Yes, that's the one I had and was referring to... it worked great. I knew it was Com-something ;-) Sounds like there are already a couple of knockoffs out there. Larry N8LP David J Windisch wrote: Hi, all concerned: I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100 discrete parts on a 4X6in board. What the device does is to heterodyne baseband audio to vlf, put it through a USB filter, limit it, lowpass-filter it, and heterodyne it to baseband. Inband distortion products are kept down this way. If there's enough interest, it could be resurrected by retrofitting with newer parts, eg, inductors other than telco toroids ;o) and kitted. If anyone knows of contra indications, do please step forward. I've done a cursory search for Comdel and its successors and found nothing except old ads and a review in June 1968 HAM RADIO magazine (it sure was a pleasure to reread some Jim Fisk). I do recall reading that the unwary occasionally fried amps which couldn't stand the increase in average power. Caveat user. If anyone wants to hear what the thing sounds like, I could get on 160-10M ssb once I figure out the internal mic connections to my to K2/100. Fingertalk is much easier, for me in any case. 73, Dave, N3HE ___ 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
Re: [Elecraft] Speech processing
This is one for Eric to weigh in on, but with proper in/out routing between transmit and receive, I wonder if it wouldn be possible to come up with an algorithm to make the KDSP2 work as an rf clipper/filter in transmit with baseband audio output? Of course, the settling time between T/R might well be a problem. Larry N8LP [EMAIL PROTECTED] wrote: In a message dated 04/03/05 11:00:07 GMT Standard Time, [EMAIL PROTECTED] writes: I have an old Comdel in-mic-line r-f clipper, which uses fewer than 100 discrete parts on a 4X6in board. --- I have one of the Datong D75 RF speech processors since about 1980 (25 years). The leaflet that came with it shows it as being derived from earlier products, the RFC and the automatic model the ASP, though not sure when these were first on the market. By the time the D75 was introduced the circuitry had been reduced to 7 IC and 2 transistors. Uses the phasing method to generate an SSB signal at 60kHz then clipped before demodulation back to audio. Draws 9mA from a small PP3/6F22 internal 9V battery or can be externally powered from the radio which is what I did with a Yaesu FT707 used at one time. It worked well though the resultant audio quality was not for local usage at higher levels of clipping! What does what inside the box is a mystery as Datong are infamous for not releasing schematics, a policy carried through to this day I found out when trying to obtain circuit information of their DF1 FM RF direction finding system. I have one with a missing head unit and need to get into operation for tracking local morons on the repeaters. A request to Datong who are now in the professional RF surveillance field after pulling out from the amateur market for help and schematic information led to a polite, but firm refusal. The main station HF transmitter in use at this end the JRC NSD-515 (1982 vintage) uses RF clipping in the IF chain with 2 filters cascaded, one either side of the TA7302 clipper IC at 8.7MHz. This works very well with resultant audio quality good enough to leave it in circuit at all times for SSB and just varying the amount of clipping to suit the occasion. A great pity that the K2 does not use something similar with the KSB2, but with available space at a premium, would guess that this would be rather difficult to fit in. Bob, G3VVT ___ 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] (no subject)
ORRY TO HAVE OPENED A BEE'S NEST WITH MY QUEST FOR A TS-850 TYPE SPEECH PROC. tHE PROC IN THE K2 WOULD BE USEFULL FOR A SMALL AMOUNT OF PRE-COMPRESSION. ALSO ONE CAN USE AN OP AMP TO MEASURE THE DIFFENCE BETWEEN AVERAGR POWER AND PEAK POWER. THIS GIVES US A CONTROL VOLTAGE TO VARY THE GAIN OF AN RF AMP WITH TWO SHTOKEY DIODES FOR ULTRA HIGH PEAKS. THE ENVELOPE IS CLAMPED AT ..15-.18 VOLTS. A SINGLE POLE FILTER(SHAPINNG AND BW) BEFORE WE GO THROUGH THE 7 POLE SSB FILTER. tHIS DESIGN IS CLOSE TO WHAT IS DONE IN THE TS-850. ___ 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] (no subject)
tHE ORIGINAL TS-520 HAD A DX SWITCH. IT WAS A CHEAP AND EASY WAY FOR RF PROCESSING. WHEN THE DX SWITCH WAS KICKED IN, A AMPLIFIER BEFORE THE DRIVER INCREASED GAIN. THE ATTACK AND DELAY OF THE FINAL ALC THEN WOULD USE SHORTER TIME CONSTANTS. THE RESULT WAS GREAT ___ 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] K2 and RF-clipping
In stead of modifying the well-designed interior of K2, the clipper can be external. Look at www.qsl.net/df4zs where a small print is inside the microphone itself. Having access to + voltage, mic can have a genuine RF-clipper built inside (AF-filtered SSB-clipper-filtering-prod.det-AF). Hence, the same mic can supply correctly cipped speec to any rig. Another thing: see that your microphone capsule can be used with RF-clipping. I have tested, every time a new clipper is installed, by listening the result. A 6dB/octave roll-off of low frequencies from 1kHz down seems to be necessary before balanced modulator. My tests have always ended to BROWN 2 military dynamic capsule or HEIL units (where preaccentuation is already built-in). Result: Heil always because of size. -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ ___ 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] RF-clipper
Instead of modifying the well-designed interior of K2, the clipper can be external. Look at www.qsl.net/df4zs. I have 36x27 mm print INSIDE THE MICROPHONE itself. Of course it is a 10mA miniversion, but a genuine RF-clipper with two filters,3 ICs and 3 potmeters. Variables are input, output, pitch (oscillator frequency = passband tuning). Should df4zs invent it again? Another thing: take care your microphone is compatible with RF-clipping. I have tested, every time a new clipper is installed, by listening the result. Normally I had more than 6 mic candidates. A 6dB/octave roll-off of low frequencies from 1kHz down seems to be necessary. My tests have always ended to an old BROWN 2 military dynamic capsule or HEIL units (where preaccentuation is already built-in). Result: Heil always because of size. -- Using Opera's revolutionary e-mail client: http://www.opera.com/m2/ ___ 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] RF-clipper to K2
That looks perfect Benny, no matter where you mount it. Larry N8LP Benny Aumala wrote: In stead of modifying the well-designed interior of K2, the clipper can be external. Look at www.qsl.net/df4zs where a small print is inside the microphone itself. Having access to + voltage, mic can have a genuine RF-clipper built inside (AF-filtered SSB-clipper-filtering-prod.det-AF). Hence, the same mic can supply correctly cipped speec to any rig. Another thing: see that your microphone capsule can be used with RF-clipping. I have tested, every time a new clipper is installed, by listening the result. A 6dB/octave roll-off of low frequencies from 1kHz down seems to be necessary. My tests have always ended to BROWN 2 military dynamic capsule or HEIL units (where preaccentuation is already built-in). Result: Heil always because of size. ___ 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: Rubber knobs
I use the rubber ring from the Yaesu FT-100 fitted over the K2's knob. It's a tight fit. I like it ! :-) Dave KK7SS ___ 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] KX-1 output problem
I recently finished my KX-1 and installed the ATU board only to find that my ouput is only about 0.9 watts on 40 and 0.2 on 20. When I finished the basic KX-1, I put it on an uncalibrated QRP wattmeter and it read about 2 watts, so I thought I was in the ballpark. Now, assuming that my original 2 watt reading is really 0.9, I find that the output is the same both with and without the ATU, so the problem must be in the transmitter and not the ATU. The KX-1 checked out fine through stages 1 and 2 and the resistance readings for stage 3 were all OK. I just checked the voltages on Q4, Q5 and Q6 and they are within 10% of the table. I've checked the continuity for all the toroids and T1, as well and recounting the turns and lead placement. The output control is fully clockwise and the output is being fed into a 50 ohm dummy load. All control functions appear to be working correctly and the receiver seems to be normal on all the bands. I'm at a loss and could use a healthy does of elecraft mojo Thanks, John WA8FNJ ___ 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] KX-1 output problem
I recently finished my KX-1 and installed the ATU board only to find that my ouput is only about 0.9 watts on 40 and 0.2 on 20. I had a similar problem in my recently completed KX1. I solved it by redoing the step in which you null the voltage reading from the trimmer cap (step says to set your meter at 2-3 VDC max, etc..) The first time, I attached a 40 meter antenna, which may or may not have presented a proper 50 ohm load. The null was at about 78 mV. The second time, I used a real 50 ohm dummy load, and got the null down to zero volts, easily. Don't forget to set ATU to CAL in the menu, rather than TUNE, before doing this. Also don't forget to set it back to TUNE when operating for real :) Power is back to normal, showing about 2 watts on the 40 meter antenna, under battery power. Haven't tried external 12 VDC yet. Good luck and email me directly if I can be of any more help. Wayne/Eric and all: this KX1 is simply fantastic. Nice user interface, nice quality kit, great sounding CW note (monitored on separate rx), very very happy op. Have yet to make my first QSO and looking forward to it. Nice job. --Andrew, NV1B ___ 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] my final word on tight skirts
I'm pleased that the KDSP2 addresses the issues that limit the KSSB2's performance. And yes, that is a common approach these days; have an unspectacular filter close to the antenna, and clean things up at audio with DSP. This leads me to say two things: We all know, or at least we should know, that the best approach has always been and continues to be, putting the best selectivity as close to the antenna as possible. If the KDSP2 is designed to improve (read, make tolerable) the SSB performance of the K2, the advertising should indicate that the K2 should not be used for serious SSB pursuits unless it's combined with the KDSP2. That would be fair. I'll probably order one (KDSP2) today. I hope Eric realizes that these criticisms come only because the K2 is a history making radio in most other respects. 73, Merlin, W3ICT ___ 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] RS solder station and ESD Equipment
I wonder who makes that station for them. Stan Rife W5EWA Houston, TX K2 S/N 4216 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Daniel Reynolds Sent: Thursday, March 03, 2005 11:13 PM To: George Cortez; elecraft@mailman.qth.net Subject: Re: [Elecraft] RS solder station and ESD Equipment It's what I used for K2 #3421 almost two years ago. Both are ESD safe - just have to use an extra wire with banana plugs betwen the matt and the soldering iron to get everything at the same potential. I have had no trouble at all with any of the ESD sensitive devices in my rig (although, I did have a flaky PLL crystal). Daniel AA0NI --- George Cortez [EMAIL PROTECTED] wrote: Took a walk throrugh Radio shack today and they had a digital soldering station for about 69$ in stock also has a ESD set with mat and hand strap for 25$ (I bought this one) May be worth a look if you need the stuff now. George NE2I ___ 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 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] KSB2-Filter Measurements
Having had to today off work because of the snow, I had a chance to look at my KSB2 SSB filter characteristics. My biggest interest was whether the filter had blow-by and if so, how much. First I modeled the filter input and output switching networks using 150 ohms as the source and filter load impedance. I expected more leakage from the switching, and was pleasantly surprised when I got 110 dB of isolation. Of course the real thing will have greater leakage, but at least it is in the Ball Park. To get a rough idea of the crosstalk between the input and output connectors on the RF board and also the tracking I used the CW filter. Using a signal generator I injected a low level signal and peaked it in the filter. I then removed the CW filter and increased the signal generator level until I got the same S meter reading. Although rather crude this measurement gave me a measurement of around -95dB. Again not bad. Using Spectrum Lab set to 24bit sampling I got a K2 OFF on screen noise floor of about -115dB. Switching the K2 ON raised this to -95dB. I connected a noise generator and set my K2 to 28MHz, AGC OFF, and PreAmp ON. I made the following measurements:- 0dB 1kHz -6dB 2.7kHz -60dB 3.5kHz -90dB 3.9kHz Shape factor 1.3 The noise floor was intercepted at about 4.5kHz. Both sidebands were nearly identical. Switching off the PreAmp improved the reading slightly. This performance was very much better than I expected. The passband has, however about a 2dB ripple in it. Any suggestions on a cure for this ? I tried to improve the filter response by adding brass shim as screening on the top and bottom of the board, but it made no noticeable difference. No blow-by here... I think that the filter is working just about as well as the design permits and I am very pleased with the results. 73 Stewart G3RXQ ___ 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] K2 S/N 4787 Build In Progress
Jim, I am only speaking from my experience and this may be a childish statement from your point of view, and I am not trying to be smart or anything like that, but be sure and look at both sides of the capacitors. Some of them have numbers on both sides. I got in a hurry when doing my inventory and could not find a couple of capacitors because I made this mistake. But then again, that's me. I'm sure you are already aware of this but I thought I would mention it. I actually called Elecraft and told them I was missing a couple of caps because of this. I had egg on my face when I realized what I had done. The plus side is that I had a couple of caps for my junk box. Hi Hi Stan Rife W5EWA Houston, TX K2 S/N 4216 Jim, AB0UK, wrote: I'm inventorying each board as it is begun. ... At this point capacitors for the RF board are a wild blur. I'm sure I have not correctly identified at least a third of them. Many numbers on the caps are simply not in the parts list. If anyone has a good way to ID them I would be pleased to hear from you. Measuring them so far has proved somewhat futile with a simple DVM with a capacitance measuring function. Several resistor packs have not had the right part numbers. So far I've been able to ID them by measureing them. My impression so far is that there are components of some of the accessories to be installed on the three main boards but when and sometimes how is not always clear. -- ___ 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] RS solder station and ESD Equipment
--- Stan Rife [EMAIL PROTECTED] wrote: I wonder who makes that station for them. Stan Rife W5EWA Houston, TX K2 S/N 4216 My guess is that it is a contract out of China. I don't think they are 'rebranded' from another manufacturer (although my knowledge of electronics tools and soldering stations is quite limited). I bought the R/S setup (ESD matt/wrist strap and Temp controlled iron) thinking - It would be a good experiment for others who don't want to, or can't, acquire the higher end tools like Weller, etc. Since I know that they worked for me - I offer my little endorsement - but keep in mind that the soldering station might not be grounded by plugging it in - you should use an extra cord that does not come with either the station or the ESD matt wrist strap. That cord was easily assembled with some simple wire and a couple banana plugs from R/S. I think I ran the soldering iron and wrist strap to the matt, and the matt to the ground plug on the outlet. Most of the time I ran the iron around 700 deg F. Although it's not really a bragging point - I was able to build the kit completely from resources I acquired at R/S (including a mini-screwdriver kit, flush cut diagonal cutters, needle nose pliers, forceps, solder, etc). They're not the best tools, but they worked - and they enabled me to put together the 'best' little radio. I built my K2 (#3421) and all of my options (KNB2, KAF2, KAT2, KSB2, KBT2, PLL stability kit, Dummy Load, 4:1 Balun) with this set up - and the only problem I had was non-ESD related (flakey PLL crystal started to go out after a few weeks). This is perhaps more of a testimony to the design of the kit than it is to the quality of the tools - but it can be done. = For those lurking... If you are on the fence wondering whether or not to build a K2 - wonder no longer. 90% of the requests for help you see here are from fewer than 10% of kit builders (should I dare say 3%?). The chances that you will really need help are low - and if you do need help - you'll get a reply very quickly from this group. For any new builder ... keep in mind the following: - If you don't know how to solder - practice on one of the mini-kits or a K1 - Inventory before you build - Use ESD safe procedures - Build when you are awake and alert - Check twice Solder once - Make sure the K2 works before you start adding options Finally - have fun! This is one of the greatest little radios you'll ever build and own. 73, Daniel AA0NI -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Daniel Reynolds Sent: Thursday, March 03, 2005 11:13 PM To: George Cortez; elecraft@mailman.qth.net Subject: Re: [Elecraft] RS solder station and ESD Equipment It's what I used for K2 #3421 almost two years ago. Both are ESD safe - just have to use an extra wire with banana plugs betwen the matt and the soldering iron to get everything at the same potential. I have had no trouble at all with any of the ESD sensitive devices in my rig (although, I did have a flaky PLL crystal). Daniel AA0NI --- George Cortez [EMAIL PROTECTED] wrote: Took a walk throrugh Radio shack today and they had a digital soldering station for about 69$ in stock also has a ESD set with mat and hand strap for 25$ (I bought this one) May be worth a look if you need the stuff now. George NE2I ___ 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] K2 paint
Hi o all This morning I ordered the repair paint from Elecraft. I was not aware of this nice addition to the parts and mod kits page but thanks to Mick, M1MDG, I found the solution to my problem (I hope I will need it only for the light scratch on the bottom cover, Hi). I really believe that my mistake was as a result of the excitement to fire up the rig. Fortunately everything went well and K2 #4726 passed alignment and test part I with any trouble. I am just waiting for the weekend to go on building. I will let you know. What a big pleasure to fire the K2 for the first time. Lisa Jones at Elecraft was, as always, absolutely kind and helpful. Many thanks once more to the Elecraft team for an excellent job and outstanding service. Best 72 de Vicens, EA3ADV ___ 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] K1 RIT Mod!!!
Hi again, I just soldered a bit. Changing C7 is not to my satisfaction as it also increased the tuning range considerably. So C2 or L1 would have to be adjusted too. After a more thorough search in the web I found out that changing R4 and R5 on the FPB has the same effect on the RIT range but leaves the tuning (VFO) range as is. I changed the 10k resistors to 56k which gives me about +/- 700Hz RIT. I wonder why this simple method is not described in the manual... And I wonder why the side effect of changing C7 is not mentioned either. It would be nice to decide the RIT range during build time like the VFO range. Keep on building! Gerhard Schwanz DH3FAW mailto:[EMAIL PROTECTED] http://www.gs-personal.de ___ 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] KX-1 output problem
Hey John: I had a similar problem with my KX1. It ended up being a bad solder joint on a resistor pack. I cannot remember which one, but if you look at the schematic you will be able to locate it. After applying a little heat to the joint all was OK. Hope this helps in some way. Ken/NO4D john gindlesberger wrote: I recently finished my KX-1 and installed the ATU board only to find that my ouput is only about 0.9 watts on 40 and 0.2 on 20. When I finished the basic KX-1, I put it on an uncalibrated QRP wattmeter and it read about 2 watts, so I thought I was in the ballpark. Now, assuming that my original 2 watt reading is really 0.9, I find that the output is the same both with and without the ATU, so the problem must be in the transmitter and not the ATU. The KX-1 checked out fine through stages 1 and 2 and the resistance readings for stage 3 were all OK. I just checked the voltages on Q4, Q5 and Q6 and they are within 10% of the table. I've checked the continuity for all the toroids and T1, as well and recounting the turns and lead placement. The output control is fully clockwise and the output is being fed into a 50 ohm dummy load. All control functions appear to be working correctly and the receiver seems to be normal on all the bands. I'm at a loss and could use a healthy does of elecraft mojo Thanks, John WA8FNJ ___ 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 -- 73 God Bless, Ken/NO4D http://webpages.charter.net/kgk Ambassadors For Christ Net +/- 7.280 M-F at 2:00 EST Sat at 2:30 EST ___ 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] Kx1 Mobile Ant
I've run HF mobile since the 1950's and over the years I found out what works and what dosn't. The worst mobile ant I ever used was the type with bottom loading coil. It was the next best thing to a dummy load. Later I tried the top loaded Hustlers and they were a little better but not by much. Then when the Lakeview Ham Sticks came on the market, the increased efficiency of that design was amazing. I used them 40 to 10M with excellent results. Worked a lot of DX on 20M while in motion using the Ham Stick. The 80M ham stick is mostly loading coil but it did work better than any other 80M mobile ant I had tried. On the motor home I finally settled on using a 40M ham stick on one side and a 20M ham stick on the other side of the roof. That way I could switch bands on the road. When spending the night on the road I always tried to stop where there was a tree nearby to throw up a 35 ft wire Simply unscrewed the ham stick and used that wire with a long wire tuner in the vehicle on all bands. That of course was much better than a 7 ft long Ham Stick. Its no wonder these hams who are using the center loaded screwdriver ant's need to have a 500w amp in the vehicle to be heard :-)Frank W7is - This mail sent through IMP: http://horde.org/imp/ ___ 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] K2 S/N 4787 Build In Progress
I've been doing electronics for years and there's some pattern matching you have to do when sorting out parts. Especially caps and resistor packs. It's not completely automatic like resistors used to be. (I say used to be because I could swear the colors were clearer when I was younger. :) ) I'd take all the capacitors and group them together first. Then you know that you have 12 marked 104 (for example) and then look on the list to see which capacitor you should have 12 of. Once in a while Elecraft gets the counts wrong so make sure you double check the values and ask here if you have to. Jim, AB0UK, wrote: I'm inventorying each board as it is begun. ... At this point capacitors for the RF board are a wild blur. I'm sure I have not correctly identified at least a third of them. Many numbers on the caps are simply not in the parts list. If anyone has a good way to ID them I would be pleased to hear from you. Measuring them so far has proved somewhat futile with a simple DVM with a capacitance measuring function. Several resistor packs have not had the right part numbers. So far I've been able to ID them by measureing them. -- Hisashi T Fujinaka - [EMAIL PROTECTED] BSEE(6/86) + BSChem(3/95) + BAEnglish(8/95) + MSCS(8/03) + $2.50 = latte ___ 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] WTD:Kenpro/Yaesu G600RC Rotator Info...
Guys' Apologise if this is OT...but need help on this one... Does anyone on the list...have a copy of the Kenpro/Yaesu G600RC Rotator manual... The 600RC IS NOT the same circuit diagram as the G400 or G400RC made either by Kenpro or Yaesu... There are differences in the switches on the diagram...and also some other wireing is different I need the G600RC information either in Kenpro or Yaesu formatwhich I'm sure will be found in the manual for the said rotator... I will pay for shipping/copying if someone can help supply the information... Thanks In Advance...apologies for the OT thread Andy [EMAIL PROTECTED] ...I Just See It.!.. John A. Ross (RSD Communications circa 2004) A.R.S. GM0NWI QRP ..It is vain to do with more A Dis-Orientated Kiwi... K2 S/n 01432 Soon To Be On-Airwhat can be done with less.. In The Northern Hemisphere... GQRP No.9576 QRP-L No.2165 ARCI No.10561 Alaska QRP Club No.190 Flying Pigs QRP Club No. FP#-1061 ICQ No.31899603 ___ 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] WTD:Kenpro/Yaesu G600RC Rotator Info...
Guys' Apologise if this is OT...but need help on this one... Does anyone on the list...have a copy of the Kenpro/Yaesu G600RC Rotator manual... The 600RC IS NOT the same circuit diagram as the G400 or G400RC made either by Kenpro or Yaesu... There are differences in the switches on the diagram...and also some other wireing is different I need the G600RC information either in Kenpro or Yaesu formatwhich I'm sure will be found in the manual for the said rotator... I will pay for shipping/copying if someone can help supply the information... Thanks In Advance...apologies for the OT thread Andy [EMAIL PROTECTED] ...I Just See It.!.. John A. Ross (RSD Communications circa 2004) A.R.S. GM0NWI QRP ..It is vain to do with more A Dis-Orientated Kiwi... K2 S/n 01432 Soon To Be On-Airwhat can be done with less.. In The Northern Hemisphere... GQRP No.9576 QRP-L No.2165 ARCI No.10561 Alaska QRP Club No.190 Flying Pigs QRP Club No. FP#-1061 ICQ No.31899603 ___ 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] K2 #4785
Hello all K2 #4785 Has arrived in the UK today no parts missing..5 days to get here wow. 2 years since i built my K1 #1532 so this should be fun. Mick m1mgd ___ 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] Rubber Knobs and Tight Skirts
Hello All: A little levity for weekend. I have been inundated with pornographic spam and e-mails lately. So, when I saw e-mails regarding Rubber Knobs and Tight Skirts, I thought the worse. I'm glad it was all some nice clean Amateur Radio Elecraft traffic. 73, Mark, K7MAS K2 874 ___ 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] Rubber Knobs and Tight Skirts
On Fri, 2005-04-03 at 12:55 -0800, Mark Sandler wrote: A little levity for weekend. I have been inundated with pornographic spam and e-mails lately. So, when I saw e-mails regarding Rubber Knobs and Tight Skirts, I thought the worse. I'm glad it was all some nice clean Amateur Radio Elecraft traffic. At least it wasn't tight knobs and rubber skirts... :-/ For those who get lots of spam, there are some good spam filtering solutions, some of which are free. I recommend a Bayesian filter. It's a statistical technique that works by first learning what the contents of your typical ham and spam are, then applying that knowledge to filter incoming mail. Once it has been trained it is incredibly accurate - a well trained Bayesian filter can approach 100% accuracy. If it does make a mistake, you can retrain it with the email that it got wrong; it just keeps getting more accurate. I use SpamAssassin on Linux (which uses other filtering techniques as well as Bayesian filtering). I'm not sure if it's available for Windows or not. I have very few false negatives, and *no* false positives (i.e. once in a while it misses a spam, but *never* identifies a good email as spam - not bad for over 500 emails per day). A good place to start for more information on Bayesian filtering is Paul Graham's site: http://www.paulgraham.com/antispam.html If you don't care how it works and just want links to download software, there's some links in the FAQ: http://www.paulgraham.com/spamfaq.html As always, Google is your friend. Try searching on bayesian, or something like free windows bayesian, and you'll find lots of information, and quite a few good free software packages. If you're using Linux, just get SpamAssassin... Sorry for the off-topic post - as punishment I'll buy some more Elecraft kits. :-) -- 73, Brian VE7NGR ___ 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] Power Supplies and Amplifiers
Hello Group, I've been kinda lurking for a while and haven't seen much about power supplies. Is there a 'supply of choice' for the K2? It's needs are modest, and present no difficulty, but for the 100 watt overshoes - well, that might be a different story. While I'm on the subject of power... Is it possible to purchase the power amp and tuner, build 'em both in a single enclosure and operate them from the K2 while leaving the K2 in a pure QRP state? 73, Tom ___ 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] Power Supplies and Amplifiers
Is it possible to purchase the power amp and tuner, build 'em both in a single enclosure and operate them from the K2 while leaving the K2 in a pure QRP state? See http://home.pacbell.net/johngreb/k2_100_in_ec2.pdf and http://www.kk7p.com/k2kpa100.html. 73, Lyle, KK7P ___ 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] Power Supplies and Amplifiers
Tom, There is no 'power supply of choice' that I am aware of except for MY choice! I don't like the noise potential of switching supplies (but I admit many are reported as no noise problem). I use a linear supply and keep it on the floor under the operating table. Transformers can couple into the K2 and cause a bit of hum on the transmitted signal if positioned close (keep them 2 feet or more away from the K2). If you are considering battery power for your QRP K2 (either the internal KBT2 or an external gel cell), you might want to take some hints from the 'SmartCharger' article on my website www.qsl.net/w3fpr. I use the K2 internal battery and the SmartCharger on my QRP K2 and use an Astron RS-35A to power my separately mounted KPA100. Battery Powered K2 to go and 100 watts from the home QTH - just pick it up, disconnect 4 cables (KIO2, Antenna, Key, and SmartCharger lines) and it is ready to go portable. 73, Don W3FPR -Original Message- I've been kinda lurking for a while and haven't seen much about power supplies. Is there a 'supply of choice' for the K2? It's needs are modest, and present no difficulty, but for the 100 watt overshoes - well, that might be a different story. While I'm on the subject of power... Is it possible to purchase the power amp and tuner, build 'em both in a single enclosure and operate them from the K2 while leaving the K2 in a pure QRP state? ___ 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] (no subject)
He did not want a full 100W, and he wanted to not have to swap tops to convert rig. There are HF amps 30-40W that are made for the yeasu Ft-817. Do not be tempted to buy the cheap ad filthy Palomar TX-50. It is a broad band 3-30mhz 50W out either, unless you can design filters well. I use MATLAB. A computer lauguage that lends it self to write RF simulation programs, as well as any other science simulation. This program will give you the step function as well as response on desired frequency. It is a fun program. to see if your gizmo will work before you build it! ___ 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: Mobile Antenna for KX1
I have had success using the Outbacker Outreach antenna with my KX-1. I just screw it into the ball mount on my pickup truck bed when wanting to operate portable. Of course, I do not leave the Outbacker there while moving the vehicle as it is 12 ft tall. It does work better in my application than the smaller ham sticks tried earlier. Just find what works well for you and enjoy. Doug KJ4X ___ 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] Trip to Canada
But he has to operate within the Canadian band plan - right? Just to make a point - not to whine - I often hear Canadian SSB on top of the 7.070 PSK frequency. 73, Paul ___ 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] W4PA MUTILE RIG SOFTWARE
Any body have experience with the new dual rig control. You can use one rig for TX THE OTHER FOR RX. Of course the K2 wins out in the RX dept. In fact it rated up there with the orion and the $10,000 ICOM My K2 is for QRP. I AM not going to put in the 100W amp, I will put in the DSP The W4PA software was orginaly for the Pegsus/Jupiter. After many saw how bad the all DSP IF was, they came out with a comercial quality RX. Now the list includes the ELEKRAFT K2, as well as just about any other rig. The idea is to have the variable TX bandwidth of some rigs and use a known for its excellent RX. I have an old Pegasus. However I think the softwre allows any two rigs with a seriel port. They even have a DDS VFO/rs-232 interface for the Drake TR-7. I think, I a not sure that this latest revision allows any two rigs to use separate TX/RX. I was thinking of using the K2 for the receiver and a FT-100D for the 100W tx and VHF/UHF The HF RX on the FT-100D is horrible. Anybody have experience and/or tips for me to make dream microshack? ___ 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] Trip to Canada
On Fri, 2005-04-03 at 16:59 -0800, designer wrote: But he has to operate within the Canadian band plan - right? Just to make a point - not to whine - I often hear Canadian SSB on top of the 7.070 PSK frequency. He has to operate according to Canadian regulations, yes. Our regulations do not specify what mode may be operated where, either by mode or by bandwidth. There is a maximum bandwidth for each band (6kHz for all HF bands except 30m and 10m). As long as we are within the maximum bandwidth and within the ham bands, we are legal. The only bandplan we have is a gentleman's agreement. It lists 7.050 to 7.100 as SSB. It doesn't list PSK31 at 7.070, probably because it hasn't been updated since 1995. There are probably lots of operators who don't realize that 7.070 is a common PSK31 frequency. -- 73, Brian VE7NGR ___ 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] Power Supplies and Amplifiers
Tom Skinner wrote: I've been kinda lurking for a while and haven't seen much about power supplies. Is there a 'supply of choice' for the K2? It's needs are modest, and present no difficulty, but for the 100 watt overshoes - well, that might be a different story. The following is my experience with power supplies. I was using an Astron 12A (9 A continuous, 12 A ICS) power supply for my K2 and KTA100, and an Astron 20A (16 A continuous and 20 A ICS) for my KPA 100. The KPA100 and KAT100 are in a separate EC2 case. Both power supplies are under my desk, so the transformers magnetic field will not mess up the K2. I had them set up so I could go QRP by only turning on the Astron 12A for the K2 and KAT100 from the top of my desk and then if I wanted QRO I would turn on the Astron 20A. The above worked great till I started to work 80 CW and got complaints of a rough CW signal whether or not I had the KPA 100 on or off. In other words, if I was running the K2 with the Astron 12A I got rf into the power line to the K2, (note this was also with the K2 into a good 50 ohm dummy load and with power down as low as 5 watts) I tried another power supply for the K2 and found the problem was in the Astron 12A. The solution was to use a Tripp Lite PR10B (7.5 A continuous, 10 A ICS) for the K2 and KAT100. This cured the rf problem on 80 meters. For general interest, I do not have an amp meter to measure the power supply current for the KPA100, but I did measure the voltage drop at the Astron 20A output terminals when it is driving the KPA100 at 100 watts. The volt drop was 50 mV, from 13.78 volts to 13.73 volts, in other words insignificant. This was on all bands 160 to 10 meters (except 60 meters, do not have that mod) and verifying my rf output power at 100 W using a scope. The power drop at the terminals of the Tripp Lite which is used for the K2 and KAT100 was less then 20 mV with the K2 putting out 10 W, again verifying my output power using a scope. I am not into portable operation, so it is setup permanently with switches (Computer AC power distribution panel that fits under my monitor) and power supplies under my desk. I just turn on the main switch and the K2 switch and I am QRP with the K2 and KAT100, by powering up the Tripp Lite power supply,and if I go QRO with the KPA100 turn on the switch for the Astron 20A. 72, Steve Ray K4JPN ex K1VKW EM82ep Warner Robins GA Elecraft K2 1422 KPA-100 Heath Fan HW-101, HW-8 http://www.thewinstonator.com/k4jpn.htm ___ 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] (no subject)
On Mar 3, 2005, at 7:38 PM, [EMAIL PROTECTED] wrote: The performance of its filter, and the way that it performs when installed in the radio, is DISMAL On sideband, tight skirts (the electronic kind, gentlemen!) are terribly important, maybe more so than on CW. There is nothing neater than listening to a weak SSB signal through an IF system that has a 1.2:1 shape factor. That complete absence of interference on the sides is marvelous to hear. I'd be surprised if the KSB2 manages 2:1. Just tune through loud broadcast signals on forty meters sometime; listen to the audio images the other side of zero beat even on moderately strong signals. Of course, every K2 is subject to variability in its construction and alignment. While I'll agree the filter in the KSB2 isn't perfect, I am not experiencing this kind of performance. I do not hear images in my KSB2, even with the strongest 40m signals. I would suggest something is amiss either with your BFO alignment or with the construction of your KSB2. 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] Kdsp2 Problems
Hi, I cannot get the initializing led to flicker on my kdsp2. When I do the voltage checks, I really cannot make sense of it, versus the schematic. I have double checked that the right parts are installed in the proper orientation, re-checked for bridges, etc. I have checked that none of the control board components are rubbing against it and I am currently blind to the problem. The voltages on U1 are not right. Pin 5 should be 0 and its 4.96v Pin 14 should be 5 and its 0v Pins 15-19 should be 0 and they are all 4.96v I saw a post from January with these same indications but never saw an answer. Any clues? 73 de Neal ___ 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] Kdsp2 Problems
Hello Neal, I cannot get the initializing led to flicker on my kdsp2. When I do the voltage checks, I really cannot make sense\ of it, versus the schematic. Any clues? Here are a couple of things to try: 1) Turn the K2 on. 2) Be sure the rtc menu item is on, per page 18 of the KDSP2 manual. 3) Turn the K2 off. 4) Turn the K2 on again, then press AFIL (hold the XFIL button rather than tap it). Depending on mode, you should see CF1, CF2, or SF1, SF2, etc. on the display. 5) If you get the expected CFsomething, SFsomething, or RFsomething (depending on mode) then U1 is operating properly and the DSPx may be at fault. 6) If you see not inst then it means the K2 and U1 are not communicating. This is not a DSPx problem. It is most likely an auxbus issue, and I'd carefully double check the 2N3906 location on the KDSP2. Let me know... 73, Lyle KK7P ___ 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
