[Amps] Alpha 76 problem

[Carl]

I have a 76 3 holer here and its had its share of that aggravating relay circuitry. A real PITA to get at, especially during a contest!

Carl
KM1H


  ----- Original Message ----- 
  From: Val Erwin 
  To: k9sd ; amps at contesting.com ; Carl 
  Sent: Thursday, December 10, 2009 5:06 PM
  Subject: Re: [Amps] Alpha 76 problem


        Hi Sam........

        I agree with Carl's assesment of the problem.

        Don't forget that K-1 is latched on when the power switch is depressed on. The power on/off buttons are only temporary contact type switches.. Also, when K-1 is activated, it also starts the step-start sequence as I recall........

        Thus, per Carl, I would go straight to the power on/off switch assembly. It sounds to me like the contacts are shorted or there is something wrong with the mechanical aspect of the switch assembly. This would cause K-1 to latch up as soon as you plug in the amp.........

        Is the reverse true?.............You can't turn off the amp?............I assume so.

        Let us know what you find.....

        GL

        Val / W5PUT

        --- On Thu, 12/10/09, Carl <km1h at jeremy.mv..com> wrote:


          From: Carl <km1h at jeremy.mv.com>
          Subject: Re: [Amps] Alpha 76 problem
          To: "k9sd" <k9sd at ezl.com>, amps at contesting.com
          Date: Thursday, December 10, 2009, 8:30 PM


          Have you checked the obvious...the On/Off switch?

          Carl
          KM1H


          ----- Original Message ----- 
          From: "k9sd" <k9sd at ezl.com>
          To: <amps at contesting.com>
          Sent: Thursday, December 10, 2009 3:16 PM
          Subject: [Amps] Alpha 76 problem


          > When the amp is first plugged in and before the power switch is thrown the 
          > power comes on..the blower runs
          > There was a bad tube which caused the inrush resistor 20 ohm at 25 watts 
          > to burn out...I have replaced it ..
          >
          > I have removed all the tubes
          >
          > When I plug the amplifier in I can see that K1 relay closes....that is 
          > before the power switch is thrown..
          >
          >
          > I hope someone has had this problem before and could save me time...
          >
          >
          > Thanks for any help..
          >
          >
          >
          > also if anyone has any parts for a Harris RF-3230 amplifier let me know 
          > (mine works perfect just thinking ahead )...or If anyone is using 
          > one...always looking for
          > new folks that use them..
          >
          >
          >
          > Sam  K9SD
          > _______________________________________________
          > Amps mailing list
          > Amps at contesting.com
          > http://lists.contesting..com/mailman/listinfo/amps 

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