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1. [Amps] Clipperton-L question (score: 1): Author: "Larry" <lknain@nc.rr.com>; Date: Wed, 11 Sep 2013 14:43:03 -0400; One day when I switched from CW to SSB mode on my Clipperton-L it blew the fuse with a good bang. The switch picks between a tap and one side of the power transformer secondary tap being for CW. I fo; /archives//html/Amps/2013-09/msg00038.html (7,111 bytes)
2. Re: [Amps] Clipperton-L question (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 11 Sep 2013 14:58:48 -0400; Id check the SSB/CW switch carefully for arcing to a metal part. Common problem with an underated switch. Carl KM1H One day when I switched from CW to SSB mode on my Clipperton-L it blew the fuse wit; /archives//html/Amps/2013-09/msg00039.html (8,452 bytes)
3. Re: [Amps] Clipperton-L question (score: 1): Author: "Larry" <lknain@nc.rr.com>; Date: Wed, 11 Sep 2013 16:34:15 -0400; Thanks guys for the input. I looked at the switch and it didn't have any obvious problems but I figured a better inspection is required. Disconnecting the transformer leads was on my list as well. A; /archives//html/Amps/2013-09/msg00047.html (10,104 bytes)
4. Re: [Amps] Clipperton-L question (score: 1): Author: Robert Morris <robrk@nidhog.net>; Date: Wed, 11 Sep 2013 17:49:07 -0400; One day when I switched from CW to SSB mode on my Clipperton-L it blew the fuse with a good bang. Why switch? Higher plate volts, lower grid current. Don't have to play the 1 kw input game any more.; /archives//html/Amps/2013-09/msg00051.html (7,067 bytes)
5. Re: [Amps] Clipperton-L question (score: 1): Author: Louis Parascondola <gudguyham@aol.com>; Date: Wed, 11 Sep 2013 19:52:45 -0400 (EDT); check your power supply diodes. Simple task with a VOM on diode check mode. If that is OK then remove all the tubes and try again. If fuse does not blow then you have at least one bad tube. Look clos; /archives//html/Amps/2013-09/msg00053.html (8,563 bytes)
6. Re: [Amps] Clipperton-L question (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Wed, 11 Sep 2013 20:24:11 -0400; I dont see how it can be the transformer since all 3 HV leads are always "hot" and the fuse only blows in SSB. Something on the PS board could be the problem and all that is easy enough to test. Carl; /archives//html/Amps/2013-09/msg00055.html (11,803 bytes)
7. Re: [Amps] Clipperton-L question (score: 1): Author: "Larry" <lknain@nc.rr.com>; Date: Wed, 11 Sep 2013 20:47:32 -0400; You are correct that the transformer leads are always hot. One side of the HV winding is always connected and the switch selects the other side of HV secondary or a tap on the HV secondary. If there; /archives//html/Amps/2013-09/msg00057.html (12,194 bytes)
8. Re: [Amps] Clipperton-L question (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Wed, 11 Sep 2013 18:37:25 -0700; I actually had to check the schematic ... I couldn't believe they switch the HV side of the Xfmr, but they do. That's a terrible design. 73, Dick, W1KSZ ______________________________________________; /archives//html/Amps/2013-09/msg00058.html (13,966 bytes)
9. [Amps] Clipperton-L question (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Wed, 11 Sep 2013 21:58:06 -0700; I actually had to check the schematic ... I couldn't believe they switch the HV side of the Xfmr, but they do. That's a terrible design. 73, Dick, W1KSZ smaller desk top amps. They used an OPTIONAL $; /archives//html/Amps/2013-09/msg00062.html (9,277 bytes)
10. Re: [Amps] Clipperton-L question (score: 1): Author: "Larry" <lknain@nc.rr.com>; Date: Thu, 12 Sep 2013 07:01:32 -0400; The amp groans quite a bit when first powered on of course. I never noticed any surge in the sense of "groaning" or lights dimming when going from CW to SSB. That doesn't mean it's not there just som; /archives//html/Amps/2013-09/msg00065.html (10,780 bytes)
11. Re: [Amps] Clipperton-L question (score: 1): Author: Louis Parascondola <gudguyham@aol.com>; Date: Thu, 12 Sep 2013 08:01:15 -0400 (EDT); Just because "they all do it" doesn't make it right. their The amp groans quite a bit when first powered on of course. I never noticed any surge in the sense of "groaning" or lights dimming when goin; /archives//html/Amps/2013-09/msg00066.html (10,943 bytes)
12. Re: [Amps] Clipperton-L question (score: 1): Author: Ron Youvan <ka4inm@gmail.com>; Date: Thu, 12 Sep 2013 09:30:35 -0400; Id check the SSB/CW switch carefully for arcing to a metal part. Common problem with an underrated switch. One day when I switched from CW to SSB mode on my Clipperton-L it blew the fuse with a good; /archives//html/Amps/2013-09/msg00069.html (8,923 bytes)
13. Re: [Amps] Clipperton-L question (score: 1): Author: Robert Morris <robrk@nidhog.net>; Date: Thu, 12 Sep 2013 09:51:03 -0400; Why would you get a surge ? Every thing has been "on", the caps are charged most of the way, you are just going up a couple hundred volts. The amp groans quite a bit when first powered on of course.; /archives//html/Amps/2013-09/msg00071.html (7,441 bytes)
14. Re: [Amps] Clipperton-L question (score: 1): Author: "Larry" <lknain@nc.rr.com>; Date: Thu, 12 Sep 2013 10:21:06 -0400; I looked at the switch this morning in the amp (it's at the top of the front panel). With a mirror I spotted on the bottom side of the switch where it arced from some part of the switch contact to th; /archives//html/Amps/2013-09/msg00072.html (10,377 bytes)
15. Re: [Amps] Clipperton-L question (score: 1): Author: Richard Solomon <dickw1ksz@gmail.com>; Date: Thu, 12 Sep 2013 08:04:07 -0700; ..."No its not"... ??? Then you back that up with reference to a Vacuum Relay design ?? Apples and Kumquarts. Switching HV with any toggle switch is an invitation to disaster. If you can tap the Seco; /archives//html/Amps/2013-09/msg00073.html (11,479 bytes)
16. Re: [Amps] Clipperton-L question (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 12 Sep 2013 11:18:25 -0400; What was done likely before you were a ham was simply the way it was back then. Lots of WW2 BC-375 switches were used to switch HV taps even on commercial gear. Dentron just chose a cheaper way which; /archives//html/Amps/2013-09/msg00074.html (12,881 bytes)
17. Re: [Amps] Clipperton-L question (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 12 Sep 2013 11:18:28 -0400; Just as I suspected Larry, its very common. That is a standard Centralab switch so finding a suitable wafer shouldnt be too hard on fleabay, hamfests, etc. As long as the replacement has 2 positions; /archives//html/Amps/2013-09/msg00075.html (12,178 bytes)
18. Re: [Amps] Clipperton-L question (score: 1): Author: peter chadwick <g8on@fsmail.net>; Date: Thu, 12 Sep 2013 17:40:05 +0200; Carl, Do you know if those BC375 switches (still available from Fair Radio Sales!) were a standard switch that mostly got used in the BC375, or were they manufactured especially for the BC375? 73 Pet; /archives//html/Amps/2013-09/msg00078.html (8,062 bytes)
19. Re: [Amps] Clipperton-L question (score: 1): Author: "Carl" <km1h@jeremy.mv.com>; Date: Thu, 12 Sep 2013 12:40:02 -0400; I believe they were initially unique to the BC-375 (maybe the BC-196 predecessor) and then used as surplus in a lot of HB and commercial ham gear. Ive not seen them in any other WW2 or earlier gear.; /archives//html/Amps/2013-09/msg00082.html (9,214 bytes)
20. Re: [Amps] Clipperton-L question (score: 1): Author: Louis Parascondola <gudguyham@aol.com>; Date: Thu, 12 Sep 2013 15:12:01 -0400 (EDT); Switching the secondary is not the problem its not using a suitable switch for the job that is. I would take the switch out and put a "wire nut" on one transformer connection sealing it off and make; /archives//html/Amps/2013-09/msg00086.html (9,408 bytes)

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