[Elecraft] K3 question re dual receive
I'm confused. I've assumed that the K3 sub-receiver must be connected to a second antenna - a luxury many don't have. However, as I read more I'm starting to wonder if the sub-receiver can be used for dual receive even though you are using one antenna? Is that the case or have I just exposed the depths to which my ignorance can sink hi hi? 73/Tim NZ7C ___ 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] Why buy a K3
I've been off the reflector for months, and off the air for months, and about to get back on. Now am seeing the K3 seeming to take the world by a storm. In a nutshell, other than perhaps a second receiver - what benefits does the K3 really have over a K2 - (in layman's non-engineer language :-) Is the difference in specs something I would truly hear? Thanks all. 73/Tim NZ7C PS Does anyone know if the K3 will have much stronger audio than the K2? ___ 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] update on any changes to late serial #'s re. rx audio?
I have been away from K2's for perhaps a year and am considering building again. The only (and I mean only) frustration I've ever had with K2's is the lackluster audio (a subjective observation) which has been a subject on this reflector. My way around it in the past, to a point, was judicious adjustment in how the AGC was set during the build (balancing tradeoffs). I never did get around to hooking up an amplified Motorola speaker. Anyway, my question is this: since about serial #'s 4200-4300 or so have there been any design changes to the current K2 kit that address this question. I know it's been raised by many in the past - but just curious if there were any changes I missed. Thank you in advance. Regards, Tim NZ7C ___ 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 - please ignore
___ 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's and switching power supplies
Hi folks - I would like to know what experiences anyone has had using switching power supplies within close proximity of a K2 or K2-100. I'm considering building a fifth K2 (keep selling the dang things to people that don't build) and am toying with the idea of making up a portable module that would include a switching power supply. Thanks in advance. 73/Tim NZ7C ___ 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's and switching PS - got my answer
Thanks Frank and others - as luck has it the switching supply I have is the 1223 Frank mentioned - all who responded have not had any problems - thanks again everyone. 73/Tim W6NEK wrote: Hi Tim, I use the Simplex America Model SEC 1223 on all the K2/K2100's I build with no problems at all. Handles max current no problem and I have yet to hear any hash generated by the supply in the K2 receiver. Cheap, light weight and small foot print. It's a very good choice. Reviews here: http://www.eham.net/reviews/detail/432 Buy it here for best price: http://www.universal-radio.com/CATALOG/hamps/3747.html Good luck, Frank - W6NEK - Original Message - From: Tim Logan [EMAIL PROTECTED] To: elecraft@mailman.qth.net Sent: Saturday, January 06, 2007 1:14 PM Subject: [Elecraft] K2's and switching power supplies Hi folks - I would like to know what experiences anyone has had using switching power supplies within close proximity of a K2 or K2-100. I'm considering building a fifth K2 (keep selling the dang things to people that don't build) and am toying with the idea of making up a portable module that would include a switching power supply. Thanks in advance. 73/Tim NZ7C ___ 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] K2 has one freq with low swr - all others fine - what to check
Hi all - I have a K2 connected to a separate KPA/100 - KAT/100 box. Any frequency on my rig will tune with an SWR of 1.5 or less EXCEPT in the 7.200 MHz area where it only hits about 3.7 - 1.0. It seems odd to me that only such an isolated freq range would do thisso it makes me wonder if there is something within the rig I need to check.vrs blaming it on my wire loop which has served me so well. Being a guy whose highest technical acheivement is turning on a soldering iron - I would like a suggestion for where to start and how to proceed checking out my rig for this particular issue. Could someone offer a suggestion? Thanks very much in advance. 73/ Tim, NZ7C ___ 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 has one freq with low swr - all others fine - what tocheck
Yep that appears to have done it - thanks Dan - and thanks Don! 73/Tim Dan Barker wrote: Change the length of the feedline by a few feet. See if the problem can be encouraged to move outside the ham bands. Dan / WG4S / K2 #2456 snip is something within the rig I need to check.vrs blaming it on my wire loop which has served me so well. /snip ___ 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] Fan for Speaker in EC2?
EXcellent thought! Steven Pituch wrote: Hi all, I was looking at my KPA100 while waiting for some parts and am wondering. Since the KPA100 is in the EC2 case, I'm guessing there is no reason to put the speaker in the EC2 by screwing it to the heatsink of the KPA100. What if I found a small fan and placed it where the speaker should be to compliment the small fan at the back of the kpa100? With the opening in the heat sink it seems a perfect substitution. Any suggestions? Steve, W2MY ___ 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] KPA100 - left, right, counter clockwise?
Hi folks - I wonder if somebody can confirm part of the instructions on page 47 of the KPA100 manual. I have the KPA100 connected to my K2. The KPA100 is lying with the heat sink down and the fan to the rear next to my K2. In this position all component labels are upside down. The errata for page 47 says to touch the left side of R12 (the lead closest to RFC5). If you were looking at the board with the component levels right side up this would be the RIGHT side of R12. SO - this makes me wonder about R6. When the manual says rotate counter clockwise does this mean counterclockwise when you are looking at the components from a position where all the component labels are upside down? It seems that it must based on how the left side of R12 is described. What is correct? Thanks for any help! 73/Tim NZ7C ___ 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] Why is K2 so easy to send cw with?
Hello fellow Elecraft addicts - I've been using my Icom 706 a lot lately while I build the amp for my K2. As an 18- 20wpm cw novice I seem to have FAR more difficulty SENDING cw on the 706 then I do on the K2. I could swear it's not my imagination. After 30min on the 706 - a switch over to sending on the K2 makes it feel like I just jumped into a Formula I from an old truck. Are there factors that make one radio far easier to send cw with than another or is it just my imagination? If so - what are the factors that affect how sending cw feels? Thanks folks. 73/Tim NZ7C (non engineer electrical nimno) ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
[Elecraft] KPA100 in EC2 question - any reverse steps?
Hi folks - I am at page 21 of the KPA100 manual. I will be placing the am in my EC2 with the KAT100. My K2 is number 4667. On page 21 it begins to discuss the internal ribbon cable connections. My question is this. If I follow the KAP100 manual will I have to reverse any of the steps from this point on if I will be using the amp externally? Good advice on the reflector seems to be to build the amp, remove the current K2 top with the battery and AT etc and check out all amp functions as if the final product would be a K2/100. I am just wondering if this means that any steps will have to be reversed or desoldered when I get to the remote connection stage. Thanks for any input in advance. 73/Tim NZ7C ___ 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 to remote KPA100/KAT100 question
Hi folks - I am in the process of building a remote KPA100/KAT100 in an EC2 enclosure. The KAt100 is done and I am starting the amp. I have read Lyle and Bob's excellent descriptions of the connections between the K2 and the remote unit but in either case I believe (maybe I missed it) the KPA100 has a separate power cord from the K2. I would like to have one power cord with a Y connection to the KPA100 - and have the KAT100 get it's power internally in the EC2 from the KPA/100. I would like to be able to have all three modules (the K2, the KPA100, and KAT100) turn on via the front on/off switch on the K2. Is there any reason I should NOT do it this way or a preferred power on sequence? Thanks folks. 73/Tim NZ7C ___ 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] K60XV alignment question
Hi folks - I have all options installed in K2 and all are working extremely well. I am just finishing up with the K60XV. In doing the alignment I get a slightly low voltage reading on 5300kHZ of .79 (where the manual says it should no be less than 1.0 on page 11). All other voltages are within range. Is this a significant issue or should I leave well enough alone.rather than do the VCO alignment again from the K2 manual Alignment and Test Part II? Thanks for any advice in advance! 73/Tim NZ7C ___ 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] Insatll SSB and things go dead - question
Hello all - My basic K2 #4667 was operating on cw EXTREMELY well (audio outstanding by the way compared to two prior K2's). However, today I finished and installed the SSB board. W2-W3and C167 were removed from the RF board per instructions. According to the menu the SSB board is communicating with the K2. However I literally hear nothing but very quiet unchanging background noise. Before WWV was knocking my ears off at 10 o'clock on the AF knob. If I remove the antenna there is no change in sound. If I remove the SSB board the background sound comes up but I still don't to hear anything including WWV. What SHOULD I be able to hear in cw mode with W2-3 cut and C167 removed and the SSB board off? I first need to determine if I may have harmed the RF board when removing the 3 items, but I do not not what it should be capable of with C167 removed. If it should be pretty much just like it was prior to cutting the jumpers and C167 then I have a major problem. (Shoot - that baby was running dyno-mite on cw!) If I can confirm the RF board is still OK then I will put SSB board back in and start voltage checks. Thanks in advance for any help. 73/Tim NZ7C ___ 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] Q7 base problem solved! Thanks Don
Don Lerche was right and I thank him so much! Although I could not SEE the short I disconnected the T4 windings one by one until the Q7 base resistance shot up to 2.6k. Then I resoldered one by one - measuring Q7 after each new solder joint. Finally I redid all of the page 71 measurements and I'm back in business! It is so nice to be able to get some help on a Sunday afternoon and go to Alignment Part III 73/Tim NZ7C Don Lerche wrote: Tim, Yes, the resistance should be between 2500 3000 ohms. As you say a short on Q7 itself should be obvious, so if nothing looks bad, then after having a look at the schematic a good place to look may be around T4. There is a ground connection to winding 3-4, so a short around here to winding 5-6 would put a ground onto the base of Q7. Good hunting 73 Don, M1DIC K2/100 #3082 -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of [EMAIL PROTECTED] Sent: 30 January 2005 18:56 To: elecraft@mailman.qth.net Subject: [Elecraft] Q7 base resistance test - low reading Hi folks - I just completed the RF board and am doing the resistance checks on page 71. For Q7 base it requires 2.5 - 3.0 k. My DVM onky meausres .4 ohms - no where near 2300 - 3000 ohms. I assume this means I have a short. There is no short between the soldered pads on Q7 and I rechecked the mounting screw hardware to make sure each part was correctly in place. All other measurements for the RF board are OK. Not being anything but a paint-by-number solderer, am I reading the table correctly? That does mean 2500 - 3000 ohms write? If so, I very stumped because a short on this component should be very obvious - but I don't see it. Can someone offer some help please? Thank you very much in advance. 73/Tim NZ7C ___ 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] #4667 on the air and THANKS GARY!
Hofolks - :-) Number #4667 (sans SSB and any other modules yet) is on the air and appears to operate fb. Still blows me away to hear that first signal pulled out the air into this little box of parts I just glued together! I love it! As usual Gary Surrency was a model of patience. I was having trouble calibrating S-HI and Gary dutifully put me through every analytical step he could (all to no avail) - then he asked me if I was turning the RF gain all the way counter clockwise before callibratiing.. Well, of course yours truly had not (and apparently cannot read)! Dah! Gary was as patient and polite as can be and deserves all the kudos everyone so often gives him. It's nice to be a K2 op again!! 73/Tim NZ7C ___ 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 RF board part C72 Identity
I'm having trouble locating this part. Manual says it should be labeled 271. I have a small blue cap that is labeled 2.7C. Could this be C72? Thanks for any help. 73/Tim NZ7C ___ 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 problem at page 43 of Rev. F manual - need some help
Hi folks - I will confess I just sent Gary a query about this, but you know how it goes when it is after working hours and you would sorta' like to solve the problem tonight hi hi! Anyway, if someone truly in the know can shed insight on either of the following this evening I would be most appreciative. I am at the stage where the K2 is pluged in for the first time (my favorite part!!!). All tests up to the 2nd column of page 43 have passed (ie up to the paragraph titled RF PROBE ASSEMBLY). Bands, change, menus seem to work, voltage display works, VFO works. PF! 2 work etc. HOWEVER two problems have appeared. Before I go through every trouble shooting step in the manual maybe someone has been there done that already? 1 - The PRE annunciator is turned on for all bands - even after a reset to factory defaults. The PRE/ATT switch works and activates relays. If I go through each band and turn off the PRE and then turn the K2 off and on again, the bands WILL retain the status of having the PRE turned off. However, I do not understand why it defaulted to being turned on from the factory settings. Can you point me in the right direction to understand this? 2 - The RATE switch does not change rates. I checked the secondary menu and the basic 3 rate default is set. Can you suggest where I start to solve this issue? Thanks in advance for any help. 73/ Tim Logan NZ7C ___ 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 problem at page 43 of Rev. F manual - need some help
Jim - Your thoughts helped in narrowing the question. The A=B switch does function - so I pulled the rig apart and looked all around the rate switch for any possible solder joint problem but saw none. For good measure thought I reheated/soldered the 4 mounting posts for the switch. I also checked continuity on the bottom side of the switch. In normal position each pair of top and bottom solder points show continuity. If I depress the switch and check continuity then the diagonal point also shows continuity. Alas, the rate switch and lock still do not function. I shall await with anticipation the words of Gary the Great One tomorrow :-) The nice thing about electronics is that one way or another it all boils down to something being on or off - ie anything is solvable. Sure am enjoying building this K2 with a 4000+ serial number. My first was in the early 2000's and did not have all the mods nicely built in to the kit! Thanks for the input Jim. 73/Tim NZ7C James T. Jim Rogers, W4ATK wrote: Tim, I think the rig defaults to PRE ON. The only bands where I routinely do not use the preamp are 40 sometimes, 80, and 160. The rate switch is one of the switches read by U2 on the control panel. Look for a cold solder joint there. Rate and A=B/SPLIT share the same pull up resistor on RP1 so if A=B/SPLIT does its thing the the trouble is around the rate switch. The switch data is returned to the MCU serially so the fact that all the other switches are working excludes U2 and the serial path to the MCU. Jim, W4ATK -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Tim Logan Sent: Tuesday, January 18, 2005 7:21 PM To: Elec-Reflector Subject: [Elecraft] K2 problem at page 43 of Rev. F manual - need some help Hi folks - I will confess I just sent Gary a query about this, but you know how it goes when it is after working hours and you would sorta' like to solve the problem tonight hi hi! Anyway, if someone truly in the know can shed insight on either of the following this evening I would be most appreciative. I am at the stage where the K2 is pluged in for the first time (my favorite part!!!). All tests up to the 2nd column of page 43 have passed (ie up to the paragraph titled RF PROBE ASSEMBLY). Bands, change, menus seem to work, voltage display works, VFO works. PF! 2 work etc. HOWEVER two problems have appeared. Before I go through every trouble shooting step in the manual maybe someone has been there done that already? 1 - The PRE annunciator is turned on for all bands - even after a reset to factory defaults. The PRE/ATT switch works and activates relays. If I go through each band and turn off the PRE and then turn the K2 off and on again, the bands WILL retain the status of having the PRE turned off. However, I do not understand why it defaulted to being turned on from the factory settings. Can you point me in the right direction to understand this? 2 - The RATE switch does not change rates. I checked the secondary menu and the basic 3 rate default is set. Can you suggest where I start to solve this issue? Thanks in advance for any help. 73/ Tim Logan NZ7C ___ 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] EC2 for batteries charger KAT100
The EC2 could be a nice companion to a K2/100 when using for portable QRP if it contained the KAT100; more amp-hours in battery storage as compared to the single 2.9 A/H battery in a traditional K2; and battery/monitoring /charging cicuitry. If anyone has done this I would like to hear from you. It would probably be best to reply on the reflector so others can hear about your efforts. Thanks in advance. 73/Tim Logan NZ7C ___ 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 Control Board U1 component number correct?
Hi folks - My K2 inventory lists Control Board component U1 as SA602AN. The actual part supplied is SA612AN. I assume this is a correct part but would like to verify before soldering to the board. I'd check with Elecraft support but it's the weekend - anybody know by chance? Thank you in advance. 73/Tim NZ7C ___ 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] R U1 component number correct - got answer
Thank you Lyle! 73/Tim Lyle Johnson wrote: Hello Tim! SA602 and SA612 are interchangeable in the K2. 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
[Elecraft] An amazing manual and building procedure
As I once again delve into building a K2 knowing little if anything about how they work I am again reminded of one of the truly amazing features of the K2 - the manaul(s) and building procedures. It takes a very together mind to create an assembly process that literally anyone can follow and even teach themselves to troubleshoot. The approach to kitting this radio is just as amazing as the capability of the resulting rig. Just had to say it once again! My compliments to Wayne, Eric, and I believe Lyle for such excellent manuals and organized building procedures! 73/Tim NZ7C ___ 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] Latest status of dirft in K2/100 vs K2 with 100w amp separate
Hi folks - Could some one bring up to date on what to expect for drift if I build a new K2/100 vs a K2 with the 100w amp separated? My understanding is that initially it was a better idea to keep the amp separate - that combining it in the box with the K2 increased drift - a bit frustrating if you have $1600 tied up in a K2/100. With all the continiual mods and improvements what should a builder of a new current K2/100 now expect if he builds it proberly for drift? Thanks for any input. 73/Tim NZC ___ 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] Latest status of dirft - answer received THABKS!
Ron - Thank you - that brings me right up to date and good news as well! 73/Tim NZ7C Ron D'Eau Claire wrote: Tim, NZ7C asked: Could some one bring up to date on what to expect for drift if I build a new K2/100 vs a K2 with the 100w amp separated? My understanding is that initially it was a better idea to keep the amp separate - that combining it in the box with the K2 increased drift - a bit frustrating if you have $1600 tied up in a K2/100. -- I have a K2/100 with the current drift compensation circuits all new K2's have. If I really hammer it with very high duty cycle transmissions at 100 watts with the amplifier mounted IN the K2, I've measured drift as high as 50 Hz. On most bands it's 20 Hz or less. That's hitting it so hard the internal temperature of the K2 rises near 60C and the heat sink is too hot to hold my hand on it. I never run the K2 anywhere near that hard in normal operation. I abused mine specifically to test the PLL Temperature compensation circuit before it was added to the production kits. Also, that's after a 15 minute warm-up in receive. From a dead cold start, the drift might approach 100 Hz on the worst bands with the rig sitting in the shack. The total drift is a function of both the BFO and PLL Reference Oscillator drifts. On mine, they tend to add on the higher bands, which produces the up-to-50Hz number, and cancel on the lower bands. I believe that's typical behavior of all K2's. On the lower bands the drift on my K2 is too small to measure reliably - less than 20 Hz. Rigs may differ slightly, of course. For a short time after it was discovered that the extra heat from the KPA100 was causing excessive drift, some ops did avoid mounting it in the K2 for best stability. My K2 drifted over 200 Hz on the higher bands, running the KPA100, before the mods were incorporated. There's no longer any reason to separate them for that purpose now. I'd be surprised if you saw any difference in a new unit with the KPA100 in or out of the K2. And the heavy abuse did not harm the KPA100 at all. Of course, some of the other rigs advertise less than 50 Hz. The tradeoff is a 'noisier' receiver because they use a fully-synthesized local oscillator with a fixed reference oscillator in a temperature-controlled oven. Ron AC7AC ___ 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
