[Amps] Ameritron AL-82/1200/1500 amps mis-wired!

[WA3GIN]

Louis,

Thank You, but you should now turn this information over to the manufacturer 
so they can ensure no new amps built are miswired and two issue a factory 
bulletin with complete instructions for remediation.  I'm no attorney but I 
believe you've opened yourself up for liability if anyone attempts to follow 
your instructions as you have not included a disclaimer in your message.  A 
radio operator might appreciate your infomation but a family of a dead radio 
operator who tried to following them and failed may not be appreciative...

73,
dave
wa3gin
----- Original Message ----- 
From: "Louis Parascondola" <gudguyham at aol.com>
To: <amps at contesting.com>
Sent: Saturday, October 12, 2013 7:04 AM
Subject: [Amps] Ameritron AL-82/1200/1500 amps mis-wired!


> For those of you who might have any of these amps, they are mis wired. 
> Seems that pretty much all of them going back quite some time.  They are 
> not wired according to the schematic and therefore a possible shock hazard 
> is possible.  One might assume that when interlock switch S5 is open 
> (cover removed) that there is ZERO high voltage in the amp.  But due to 
> the mis wiring there is about 400vdc which is in the power supply and on 
> the tube anodes.  I suggest you "CAREFULLY" make the test to your amp to 
> see if the problem exists.  Simply remove the cover and turn the amp on 
> and look at the HV meter.  If you get any reading other than zero, your 
> amp is mis-wired and you should consider wiring it properly.  The fix is 
> simple. There is a blue/white wire coming from the contactor relay going 
> over to the step start relay at junction with R3.  There is a wire on S5 
> (on left contact as viewed from front).  These 2 wires need to be switched 
> to conform to the schematic.  In doing so, th
> e 400vdc with S5 open goes away.  Although the manual states never to plug 
> the amp in with the lid off, I know many of us do troubleshooting and we 
> may wrongly assume that no HV is present when S5 is open.   If you are not 
> qualified to make the repair, ask someone that is to do it for you.  I 
> believe this is a repair that should be made to all these amps that 
> exhibit this problem.  Please be careful in making the test or doing the 
> repair. Lou
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