RE: [Elecraft] KPA100 Final Transistor base resistance
For some reason the latest Errata hasn't been posted to the web site, but it should be shipped with the kits (D-4, December 2, 2006). In any case, the 11-16 ohm spec is correct for both Q1 and Q2 base to ground. Ron (whose finger slipped on the key that day) AC7AC -Original Message- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Darwin, Keith Sent: Saturday, December 23, 2006 1:10 PM To: Elecraft@mailman.qth.net Subject: RE: [Elecraft] KPA100 Final Transistor base resistance Maybe. When I did my Rev D KPA100 a few weeks ago, only ONE of the resistances was changed to read 11 - 16 in the errata. The other still said 12 - 16. Maybe the errata has been update in the last few weeks? In my case, both transistors measured 11.5 ohms and the rig works fine. 73! - Keith N1AS - - K2 5411.ssb.100 - From: [EMAIL PROTECTED] on behalf of Don Wilhelm Sent: Sat 12/23/2006 12:25 PM To: Kevin Schmidt; Elecraft@mailman.qth.net Subject: RE: [Elecraft] KPA100 Final Transistor base resistance Kevin, You are OK - check the Rev D manual and its errata sheet and you will find the range has been changed to 11 to 16 ohms. 73, Don W3FPR ___ 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] KPA100 Final Transistor base resistance
Maybe. When I did my Rev D KPA100 a few weeks ago, only ONE of the resistances was changed to read 11 - 16 in the errata. The other still said 12 - 16. Maybe the errata has been update in the last few weeks? In my case, both transistors measured 11.5 ohms and the rig works fine. 73! - Keith N1AS - - K2 5411.ssb.100 - From: [EMAIL PROTECTED] on behalf of Don Wilhelm Sent: Sat 12/23/2006 12:25 PM To: Kevin Schmidt; Elecraft@mailman.qth.net Subject: RE: [Elecraft] KPA100 Final Transistor base resistance Kevin, You are OK - check the Rev D manual and its errata sheet and you will find the range has been changed to 11 to 16 ohms. 73, Don W3FPR ___ 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] KPA100 Final Transistor base resistance
Kevin, You are OK - check the Rev D manual and its errata sheet and you will find the range has been changed to 11 to 16 ohms. 73, Don W3FPR > -Original Message- > > My daughter and I are slowly assembling a KPA100 Rev C. We are at the > alignment and installation resistance checks, and the bases of Q1 and Q2 > measure 11.4 ohms. The manual gives 12-16 ohms. Looking at the schematic, > it seems that the resistance for Q2 base should be the resistance of R9 > (10 ohms) in series with the combination of R20 (1.6 ohms) in parallel > with the series combination of R34 (10 ohms) and R19 (1.6 ohms). This > works out to 11.4 ohms. 5 percent tolerances all working together might > get this to 12 ohms, but its hard for me to see how anyone would ever > get a resistance in the specified range. Am I missing something or is > the manual wrong? > > 73 Kevin w9cf > -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.15.26/597 - Release Date: 12/21/2006 6:45 PM ___ 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 Final Transistor base resistance
My daughter and I are slowly assembling a KPA100 Rev C. We are at the alignment and installation resistance checks, and the bases of Q1 and Q2 measure 11.4 ohms. The manual gives 12-16 ohms. Looking at the schematic, it seems that the resistance for Q2 base should be the resistance of R9 (10 ohms) in series with the combination of R20 (1.6 ohms) in parallel with the series combination of R34 (10 ohms) and R19 (1.6 ohms). This works out to 11.4 ohms. 5 percent tolerances all working together might get this to 12 ohms, but its hard for me to see how anyone would ever get a resistance in the specified range. Am I missing something or is the manual wrong? 73 Kevin w9cf ___ 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
