40 & 60 meters K2 #5266
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Tom-
I hate to bother you again but I've encountered another glitch. After I located the problem on 40 meters with your Cheap 'N Dirty Signal tracing (very effective!), everything aligned perfectly on all bands. This weekend, I installed the 60 meter and 160 meter mods and when I powered up my K2 recognized both - that was the good news. The bad news is I can hear no signals on 40 meters and only hiss on 60 but I am clueless as to whether there are any signals on that 60 meter band since its so new (all I hear is a loud hissing and the same on 40 meters). I hooked up my DMM to R30 and get a steady 7.95 volts (a bit above the 7.5 max in the manual but within 10%...the voltage does not change whether I am on 7000, 7300, 5300 or 5450....it doesn't budge - a steady 7.95 volts I tried aligning L30 on transmit and can't get above .3 volts on the power meter (that's "point 3" volts). Aligning L30 on receive is equally as disappointing - the audio his doesn't vary in intensity at all. On 160, my receive antennna (R ant) menu is on "off" so that's not an issue. I hear signals on 160 and the voltages on alignment are 1.85 volts at 1800 Mhz and 6.85 at 2000 Mhz. I'm fairly confident the 160 mod is not the problem (but next time I'll install one mod at a time and align before doing the next! But I did have to take the heat sink off to install both so it made sense at the time). I have checked J15 and I have continuity between pins 1 and 3 (that replaced C-6 which was my original problem with being deaf on 40 meters). At this point, I'm tempted to remove the 60 meter mode and replace some RF Board components to put it back to the original state but I hate to throw in the towel so easily. Have you any ideas? 73, Cary, K4TM K2 #5266 ________________________________ From: H. Cary III Sent: Fri 2/17/2006 11:20 PM To: Tom Hammond Cc: [hidden email] Subject: RE: K4TM K-2 deaf...no wonde! Tom- I just substituted a 5pF NPO from W4QE's "junk" box of parts and my K-2 now has ears...thanks again for all your help...tomorrow I'll work on the receiver alignment...even without it my K-2 sure does sound good!! Thanks again for all your help. 73, "H" Cary, K4TM ________________________________ _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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Cary, on 60 meters I usually pick up WWV loud at 5000 kHz in the evening.
Harvey KN6VP ----- Original Message ----- From: "H. Cary III" <[hidden email]> To: <[hidden email]> Cc: <[hidden email]>; <[hidden email]> Sent: Sunday, March 05, 2006 7:32 PM Subject: [Elecraft] 40 & 60 meters K2 #5266 Tom- I hate to bother you again but I've encountered another glitch. After I located the problem on 40 meters with your Cheap 'N Dirty Signal tracing (very effective!), everything aligned perfectly on all bands. This weekend, I installed the 60 meter and 160 meter mods and when I powered up my K2 recognized both - that was the good news. The bad news is I can hear no signals on 40 meters and only hiss on 60 but I am clueless as to whether there are any signals on that 60 meter band since its so new (all I hear is a loud hissing and the same on 40 meters). I hooked up my DMM to R30 and get a steady 7.95 volts (a bit above the 7.5 max in the manual but within 10%...the voltage does not change whether I am on 7000, 7300, 5300 or 5450....it doesn't budge - a steady 7.95 volts I tried aligning L30 on transmit and can't get above .3 volts on the power meter (that's "point 3" volts). Aligning L30 on receive is equally as disappointing - the audio his doesn't vary in intensity at all. On 160, my receive antennna (R ant) menu is on "off" so that's not an issue. I hear signals on 160 and the voltages on alignment are 1.85 volts at 1800 Mhz and 6.85 at 2000 Mhz. I'm fairly confident the 160 mod is not the problem (but next time I'll install one mod at a time and align before doing the next! But I did have to take the heat sink off to install both so it made sense at the time). I have checked J15 and I have continuity between pins 1 and 3 (that replaced C-6 which was my original problem with being deaf on 40 meters). At this point, I'm tempted to remove the 60 meter mode and replace some RF Board components to put it back to the original state but I hate to throw in the towel so easily. Have you any ideas? 73, Cary, K4TM K2 #5266 ________________________________ From: H. Cary III Sent: Fri 2/17/2006 11:20 PM To: Tom Hammond Cc: [hidden email] Subject: RE: K4TM K-2 deaf...no wonde! Tom- I just substituted a 5pF NPO from W4QE's "junk" box of parts and my K-2 now has ears...thanks again for all your help...tomorrow I'll work on the receiver alignment...even without it my K-2 sure does sound good!! Thanks again for all your help. 73, "H" Cary, K4TM ________________________________ _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by K4TM
Also Cary, don't forget to go into the menu (might be secondary menu) and
set D19 to Y to enable 60 meter band. Harvey KN6VP ----- Original Message ----- From: "H. Cary III" <[hidden email]> To: <[hidden email]> Cc: <[hidden email]>; <[hidden email]> Sent: Sunday, March 05, 2006 7:32 PM Subject: [Elecraft] 40 & 60 meters K2 #5266 Tom- I hate to bother you again but I've encountered another glitch. After I located the problem on 40 meters with your Cheap 'N Dirty Signal tracing (very effective!), everything aligned perfectly on all bands. This weekend, I installed the 60 meter and 160 meter mods and when I powered up my K2 recognized both - that was the good news. The bad news is I can hear no signals on 40 meters and only hiss on 60 but I am clueless as to whether there are any signals on that 60 meter band since its so new (all I hear is a loud hissing and the same on 40 meters). I hooked up my DMM to R30 and get a steady 7.95 volts (a bit above the 7.5 max in the manual but within 10%...the voltage does not change whether I am on 7000, 7300, 5300 or 5450....it doesn't budge - a steady 7.95 volts I tried aligning L30 on transmit and can't get above .3 volts on the power meter (that's "point 3" volts). Aligning L30 on receive is equally as disappointing - the audio his doesn't vary in intensity at all. On 160, my receive antennna (R ant) menu is on "off" so that's not an issue. I hear signals on 160 and the voltages on alignment are 1.85 volts at 1800 Mhz and 6.85 at 2000 Mhz. I'm fairly confident the 160 mod is not the problem (but next time I'll install one mod at a time and align before doing the next! But I did have to take the heat sink off to install both so it made sense at the time). I have checked J15 and I have continuity between pins 1 and 3 (that replaced C-6 which was my original problem with being deaf on 40 meters). At this point, I'm tempted to remove the 60 meter mode and replace some RF Board components to put it back to the original state but I hate to throw in the towel so easily. Have you any ideas? 73, Cary, K4TM K2 #5266 ________________________________ From: H. Cary III Sent: Fri 2/17/2006 11:20 PM To: Tom Hammond Cc: [hidden email] Subject: RE: K4TM K-2 deaf...no wonde! Tom- I just substituted a 5pF NPO from W4QE's "junk" box of parts and my K-2 now has ears...thanks again for all your help...tomorrow I'll work on the receiver alignment...even without it my K-2 sure does sound good!! Thanks again for all your help. 73, "H" Cary, K4TM ________________________________ _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006 -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006 _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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In reply to this post by K4TM
Cary,
You must get the VFO range select voltages within an acceptable range before you will be able to hear any signals - your 7.95 volts says that the VCO frequency is out of range (and therefore on the wrong frequency) - first things first!!! First make certain you have set D19 = Y in the menu, then adjust L30 to obtain somewhere between 6 and 7 volts when tuned to 4000 kHz - with the K60XV installed it may be closer to 7 volts when everythig is adjusted within range. After that, if you still have almost 8 volts when the frequency is set to 5300, you have something wrong in the VFO Range Selection area. Check the capacitor (C71) that you changed to be certain it is 120 pf and check the soldering of C71, D19 and D20. Check to be certain the orientation of D19 and D20 are correct. I assume you had readings on R30 that were within range before adding the K60XV - if that is true, then the problem can be found in the components that you added to the VFO Range Selection area - C71, D19 and D20. Once you find the problem, check the ends of each band to be certain the voltage at R30 is within range at all band edges - if not, re-adjust L30 and check again. 73, Don W3FPR > -----Original Message----- > > Tom- > I hate to bother you again but I've encountered another glitch. > After I located the problem on 40 meters with your Cheap 'N > Dirty Signal tracing (very effective!), everything aligned > perfectly on all bands. > This weekend, I installed the 60 meter and 160 meter mods and > when I powered up my K2 recognized both - that was the good news. > The bad news is I can hear no signals on 40 meters and only hiss > on 60 but I am clueless as to whether there are any signals on > that 60 meter band since its so new (all I hear is a loud hissing > and the same on 40 meters). > I hooked up my DMM to R30 and get a steady 7.95 volts (a bit > above the 7.5 max in the manual but within 10%...the voltage does > not change whether I am on 7000, 7300, 5300 or 5450....it doesn't > budge - a steady 7.95 volts > I tried aligning L30 on transmit and can't get above .3 volts > on the power meter (that's "point 3" volts). Aligning L30 on > receive is equally as disappointing - the audio his doesn't vary > in intensity at all. > On 160, my receive antennna (R ant) menu is on "off" so that's > not an issue. I hear signals on 160 and the voltages on > alignment are 1.85 volts at 1800 Mhz and 6.85 at 2000 Mhz. I'm > fairly confident the 160 mod is not the problem (but next time > I'll install one mod at a time and align before doing the next! > But I did have to take the heat sink off to install both so it > made sense at the time). > I have checked J15 and I have continuity between pins 1 and 3 > (that replaced C-6 which was my original problem with being deaf > on 40 meters). > At this point, I'm tempted to remove the 60 meter mode and > replace some RF Board components to put it back to the original > state but I hate to throw in the towel so easily. > Have you any ideas? > 73, > Cary, K4TM K2 #5266 > > ________________________________ > > From: H. Cary III > Sent: Fri 2/17/2006 11:20 PM > To: Tom Hammond > Cc: [hidden email] > Subject: RE: K4TM K-2 deaf...no wonde! > > > Tom- > I just substituted a 5pF NPO from W4QE's "junk" box of parts > and my K-2 now has ears...thanks again for all your > help...tomorrow I'll work on the receiver alignment...even > without it my K-2 sure does sound good!! > Thanks again for all your help. > 73, > "H" Cary, K4TM > > ________________________________ > > _______________________________________________ > Elecraft mailing list > Post to: [hidden email] > 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 > > > -- > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.375 / Virus Database: 268.1.2/274 - Release Date: 3/3/2006 > > _______________________________________________ Elecraft mailing list Post to: [hidden email] 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 |
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