Re: [Elecraft] K3 Main RF Gain problem
On 09-12-23 8:09 , Don Wilhelm wrote: Don, When the sub is using the main gain potentiometer I thought that the sub should also be effected but it is not. Jim Jim, The gain controls are potentiometers, not encoders, so yes, you could have a bad spot on your RF Gain control such that the resistance has a bump in it near the 9:30 position. Firmware efforts are not likely to fix it if the pot itself has a resistance bump. 73, Don W3FPR Jim Byers wrote: The problem is with the main RF gain. If I turn down the Main RF gain S meter goes up as expected, the gain is heard to decrease and seen to decrease by Spectrogram. So far so good. When I keep turning the gain down the S meter will increase to S 30 (Rf knob position 10 o'clock) When the knob position reaches 9:30 the S meter drops to S6 and the gain comes back up both heard and seen by spectrogram. Further movement will decrease the gain to zero as heard and seen but the S meter stays at S6. Increasing the gain the reverse happens. This is true in all modes. The sub acts normally as heard and seen by spectrogram and the S-meter acts as it should. __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Main RF Gain problem
Wes, The s-meter indications are really no more than a nuisance. But the RF gain behavior is something I need to address. I am using the latest utility and firmware. Will start from scratch again (third time) see if anything changes Jim On 09-12-23 9:54 , Wes Stewart wrote: In working with Lyle on earlier versions of the rf calibration I saw some of this same action. In some cases, the s-meter wouldn't even reach FS at min RFG. You might try backing off to factory defaults and starting over, making sure you have the latest utility. On 09-12-23 0:59 , Wes Stewart wrote: Wes RF Gain calibration completed as per manual no problems seen in the calibration procedure. If in Config menu Smeter OF or other Smeters menus and I move the RF Gain the Smeter will respond as you would expect.(this is just a curious sidebar that is probably not useful info) In normal operation AGC OFF or ON S or F , PRE ON or OFF, ATT IN or OUT, ALL MODES ALL FITERS I get a gain increase in the main rcvr at the 9:30 position of the the main rf gain. Since the RF Gain calibration works for the sub reciever and the RF gain and S meter on the Sub rcvr work correctly I am beginning to suspect the JFET IF Amp and associated circuits of the main rcvr. Jim __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Main RF Gain problem
To All Your input was helpful and appreciated, Thanks. Problem solved. It was the Rf Gain Calibration that caused the problem. Initial run was done using a MacPro running Snow Leporad problem may have started here. ( will check into that tomorrow) Second and Third runs done on a MacPro using Boot Camp and Win 7 64bit Home Premium Went Straight to the option of using the XG 2 as the source. (a mistake on my part should have known to start from a known state) Problem still there after both runs. Fourth run done on a MacPro using Boot Camp and Win 7 64bit Home Premium Picked first option of writing factory values only. Problem Gone. Fifth run done on a MacPro using Boot Camp and Win 7 64bit Home Premium Used XG 2 as source Problem Gone Short version_ Stay with Factory defaults_ unless you have a good reason to make a change. Jim VE3AJ On 09-12-23 11:33, Wayne Burdick wrote: Lyle and I will look into this issue when he gets back from vacation. 73, Wayne N6KR __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
[Elecraft] K3 Main RF Gain problem
Hi Looking for some insight. K3 # 1189 FW revs 3.68 KAT3 KBPF3 main reciever KDVR3 KIO3 KPA3 KRX3 KXV3 S-Meter in relative mode. The problem is with the main RF gain. If I turn down the Main RF gain S meter goes up as expected, the gain is heard to decrease and seen to decrease by Spectrogram. So far so good. When I keep turning the gain down the S meter will increase to S 30 (Rf knob position 10 o'clock) When the knob position reaches 9:30 the S meter drops to S6 and the gain comes back up both heard and seen by spectrogram. Further movement will decrease the gain to zero as heard and seen but the S meter stays at S6. Increasing the gain the reverse happens. This is true in all modes. The sub acts normally as heard and seen by spectrogram and the S-meter acts as it should. I suspected the main encoder? I set both the sub and main to the main RF gain encoder. The main acts the same as before. I expected the sub to act like the main indicating an encoder problem but the Sub worked exactly as it should. During the Smeter calibration the main RF gain acted as it should. Turning down the gain the s meter goes up, gain goes down as expected with smooth movement no jumps or lags. What I have done twice so far without any improvement is Fresh reload of firmware Reset to Factory norms RF Gain Calibration both main and Sub redone S Meter reset using XG2 main and sub What should I look at next I really thought it would be the encoder. Jim VE3AJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Main RF Gain problem
On 09-12-23 0:59 , Wes Stewart wrote: Wes RF Gain calibration completed as per manual no problems seen in the calibration procedure. If in Config menu Smeter OF or other Smeters menus and I move the RF Gain the Smeter will respond as you would expect.(this is just a curious sidebar that is probably not useful info) In normal operation AGC OFF or ON S or F , PRE ON or OFF, ATT IN or OUT, ALL MODES ALL FITERS I get a gain increase in the main rcvr at the 9:30 position of the the main rf gain. Since the RF Gain calibration works for the sub reciever and the RF gain and S meter on the Sub rcvr work correctly I am beginning to suspect the JFET IF Amp and associated circuits of the main rcvr. Jim Jim, You say that when you do the S-meter calibration the gain control operates as you expect, but is somehow different otherwise. First, I hope you mean the rf gain calibration, which isn't calibrating the S-meter but trying to compensate the ill-defined gain v. volts curve of the JFET i-f amplifier. Nevertheless, after doing this, what are you changing that makes the difference? Is the AGC is the same state, i.e. on or off both ways? Wes Hi Looking for some insight. K3 # 1189 FW revs 3.68 KAT3 KBPF3 main reciever KDVR3 KIO3 KPA3 KRX3 KXV3 S-Meter in relative mode. The problem is with the main RF gain. If I turn down the Main RF gain S meter goes up as expected, the gain is heard to decrease and seen to decrease by Spectrogram. So far so good. When I keep turning the gain down the S meter will increase to S 30 (Rf knob position 10 o'clock) When the knob position reaches 9:30 the S meter drops to S6 and the gain comes back up both heard and seen by spectrogram. Further movement will decrease the gain to zero as heard and seen but the S meter stays at S6. Increasing the gain the reverse happens. This is true in all modes. The sub acts normally as heard and seen by spectrogram and the S-meter acts as it should. I suspected the main encoder? I set both the sub and main to the main RF gain encoder. The main acts the same as before. I expected the sub to act like the main indicating an encoder problem but the Sub worked exactly as it should. During the Smeter calibration the main RF gain acted as it should. Turning down the gain the s meter goes up, gain goes down as expected with smooth movement no jumps or lags. What I have done twice so far without any improvement is Fresh reload of firmware Reset to Factory norms RF Gain Calibration both main and Sub redone S Meter reset using XG2 main and sub What should I look at next I really thought it would be the encoder. Jim VE3AJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] K3 Main RF Gain problem
On 09-12-23 0:59 , Wes Stewart wrote: Wes RF Gain calibration completed as per manual no problems seen in the calibration procedure. If in Config menu Smeter OF or other Smeters menus and I move the RF Gain the Smeter will respond as you would expect.(this is just a curious sidebar that is probably not useful info) In normal operation AGC OFF or ON S or F , PRE ON or OFF, ATT IN or OUT, ALL MODES ALL FITERS I get a gain increase in the main rcvr at the 9:30 position of the the main rf gain. Since the RF Gain calibration works for the sub reciever and the RF gain and S meter on the Sub rcvr work correctly I am beginning to suspect the JFET IF Amp and associated circuits of the main rcvr. Jim Jim, You say that when you do the S-meter calibration the gain control operates as you expect, but is somehow different otherwise. First, I hope you mean the rf gain calibration, which isn't calibrating the S-meter but trying to compensate the ill-defined gain v. volts curve of the JFET i-f amplifier. Nevertheless, after doing this, what are you changing that makes the difference? Is the AGC is the same state, i.e. on or off both ways? Wes Hi Looking for some insight. K3 # 1189 FW revs 3.68 KAT3 KBPF3 main reciever KDVR3 KIO3 KPA3 KRX3 KXV3 S-Meter in relative mode. The problem is with the main RF gain. If I turn down the Main RF gain S meter goes up as expected, the gain is heard to decrease and seen to decrease by Spectrogram. So far so good. When I keep turning the gain down the S meter will increase to S 30 (Rf knob position 10 o'clock) When the knob position reaches 9:30 the S meter drops to S6 and the gain comes back up both heard and seen by spectrogram. Further movement will decrease the gain to zero as heard and seen but the S meter stays at S6. Increasing the gain the reverse happens. This is true in all modes. The sub acts normally as heard and seen by spectrogram and the S-meter acts as it should. I suspected the main encoder? I set both the sub and main to the main RF gain encoder. The main acts the same as before. I expected the sub to act like the main indicating an encoder problem but the Sub worked exactly as it should. During the Smeter calibration the main RF gain acted as it should. Turning down the gain the s meter goes up, gain goes down as expected with smooth movement no jumps or lags. What I have done twice so far without any improvement is Fresh reload of firmware Reset to Factory norms RF Gain Calibration both main and Sub redone S Meter reset using XG2 main and sub What should I look at next I really thought it would be the encoder. Jim VE3AJ __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Elecraft@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Re: [Elecraft] CP1 Power Handling
Bob What combination of core/turns would give up to 40dB and able to handle 100 watts and what frequency range would it have? Main interest is HF 73 Jim VE3TTN On Mar 7, 2006, at 11:46, Robert Friess wrote: Hi Michael, I designed the CP1 for Elecraft and in the process I performed many tests to evaluate the power handling capabilities. The power is limited by heating of the core and that is primarily a function of flux density and time. The published specification allows the rated power to be applied for long periods of time without excessive heating. ___ 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] Test ignore
Jim 73 Jim VE3TTN ___ 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] microKeyer with K2/100
James If you look in the box your cable came in you should find a female stereo 1/8 plug and about 12 inches of black shielded audio cable. I used a three pin Moldex style jack at J5 (same style as the frequency counter but with three pins) and then used a matching plug on the shielded wire. As far as the mike goes microHam are quite adamant that use only those mikes with that cable. I have not been able to get enough info yet to figure a way to use other mikes. I think the problem is that they have to assume that the Mic configuration header is done one way and they picked Elecraft/ Heil format as the most common. I am presently comparing the diagrams for the Kenwood cables sets and building a test cable to use a Kenwood desk mic. If I have success with the test cable I will pass the info on. If you make any progress let us know please. Jim VE3TTN On Feb 8, 2006, at 14:08, James C. Hall, MD wrote: Yep, I'm using all but the XVTR holes now. It wouldn't be a big deal to mount a stereo 1/8 plug though. I'll investigate further. ___ 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] MicroHam microkeyer
To all This URL will take you to the schematic of the cable set used with the Microham Microkeyer http://www.microham.com/Downloads/DB37-EL-K2.pdf If you look in the accessories section you can see the schematics of all the cables At present the US supplier is back ordered on the K2 cables until Nov 4th. If you wish to roll your own the online store does allow for a price reduction if you do not order a cable. I have no connection to Microham 73 Jim VE3TTN On Oct 23, 2005, at 14:34, Don Wilhelm wrote: Stewart and all, That is precisely why I hesitate to refer to the DE9 connector on the KIO2 and the KPA100 as an 'RS232' connector. To those not yet informed, please be aware that connecting a standard RS232 serial cable to this K2 connector (and the other end to a computer) will most certainly do harm to your K2. This connector carries K2 control signals (non-RS232) as well as the RS232 signals (only TXD and RXD and Signal Ground are RS232 standard levels). The connector itself does not follow the RS232 standard - perhaps it would have been better implemented as a DIN connector, but it is too late for that now. There are only 3 pins (OK, 4 if you include frame ground on pin 1) that are RS232 signals. The rest of the pins should not be subjected to the up-to plus/minus 25 volts levels that may be present should the other end of the cable be connected to a device which presents standard RS232 signals. For my own K2, I have put a plug into pin 4 and broken off pin 4 of the mating cable, so only that special cable can be plugged into the K2 to prevent an accident that can happen to the best of us. 73, Don W3FPR -Original Message- It seems to have the ability to send commands to the K2 via the serial port. What I meant to have said, was that Elecraft have some fairly non standard usage of the pins on a RS232 D type. 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
[Elecraft] Xytronic One-Shot 2008 Desoldering Gun
Selling at a local shop for $148.00 CDN seems like good unit for the price. Has anyone had any experience with this desoldering gun. _ 73 Jim VE3YZA ___ 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
