[Amps] SB 200 Input Wafer Switch

Benjamin Deovlet w6fdu at aol.com
Sat Jan 30 16:49:00 EST 2021


I've repaired several SB-200 amplifiers, and in all but one case, the input switch index alignment was the problem.  Once it was properly aligned, the amplifiers worked fine. Ben, W6FDU In a message dated 1/30/2021 1:13:38 PM Pacific Standard Time, amps at contesting.com writes: 
The problem might not be the switch.  If the contacts are in good condition and you cleaned the switch the problem might be alignment.  The shaft from the main switch can be rotated by loosening the main nut on the front panel, you have to align the opening on either end of the switch rotor so that the center of the opening is in the center of the free switch contact.  If the opening is off the error is compounded and some bands might be shorting.  Your moving the band switch might be breaking the short.  Make sure you check that before you go nuts changing the wager.  Sent from the all new Aol app for iOS  On Saturday, January 30, 2021, 2:12 PM, Ken Claerbout <kenk4zw at gmail.com> wrote: I have an SB-200 I restored for a friend.  It had a fried bandswitch.I installed the Harbach mods also.  It works great except for theinput wafer switch, which is a little flaky.  On a couple of bands,the transceiver see's a high VSWR, which can be resolved by nudgingthe bandswitch a little further clockwise. I wouldn't mind replacing that switch.  It's a little beat up.  But Idon't see any for sale.  Before I start searching for a suitablereplacement, I thought I would see if anyone knows where I might beable to get a replacement? 73Ken K4ZW_______________________________________________Amps mailing listAmps at contesting.comhttp://lists.contesting.com/mailman/listinfo/amps   _______________________________________________Amps mailing listAmps at contesting.comhttp://lists.contesting.com/mailman/listinfo/amps


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