You can't plug 811 tubes in wrong but be sure to get the voltage 
discharged before attempting that job.
sometimes it takes a while for the bleeder resistors to discharge the caps 
in the supply.  73 to all Ed  K7UC
----- Original Message ----- 
From: "Gerry Leary" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Wednesday, August 18, 2010 5:35 AM
Subject: Re: Kevin's amplifier tuning cheat sheet


> Hey Tom, I say don't ever become afraid of Mechanical things.  The worst 
> you
> can do is break them and all sighted people do that to.
> ----- Original Message ----- 
> From: "tom behler" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Monday, August 16, 2010 6:25 AM
> Subject: Re: Kevin's amplifier tuning cheat sheet
>
>
>>    Pat:
>>
>> Oh, I know they are relatively easy to swap in and out, which is why I 
>> say
>> that once I get the hang of the procedure, I'm sure I'll be fine.
>>
>> And, I think that would go for most other folks on the list too.
>>
>> What you say here is important, so others like me are encouraged, and
>> don't
>> get intimmodated about trying.
>>
>> 73 from Tom Behler: KB8TYJ
>>
>> ----- Original Message ----- 
>> From: "Pat Byrne" <[log in to unmask]>
>> To: <[log in to unmask]>
>> Sent: Sunday, August 15, 2010 10:16 PM
>> Subject: Re: Kevin's amplifier tuning cheat sheet
>>
>>
>> In the old days!! when we had tubes to change it was never a
>> problem.  Occasionally tubes had to be neutralized - that was
>> something that as a blind man I couldn't do.  It involved watching
>> grid current and making adjustments to stop that current from
>> showing.  Only a problem with triodes and no longer an applicable 
>> concern.
>> Not to demean anyone's knowledge or abilities but the tubes will only
>> go in the "right" way and the plate cap just presses on to the top of the
>> tube.
>> Hope this helps.
>> Pat, K9JAu
>>