Well, Pat, I never tried that trick with the plate cap of a 6146, but I have
gotten clipped a time or two by voltage from the flyback transformer. I
once came in contact with a few hundred volts on the output side of a bridge
rectifier circuit I built, and that felt like someone hit my finger with a
hammer. Oh yes, and then there's the times I was trying to adjust some
coils on the underside of a hollow-state Heathkit receiver and got jolted by
the plate voltage on one of the tubes. Life is just so dull in today's
solid-state low-voltage world.
Steve
----- Original Message -----
From: "Pat Byrne" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Monday, February 28, 2011 18:27
Subject: Re: RFI Saga continued
> Sounds like an old guy who ripped up his knuckles coming out of the
> back of an old TV set!! Or if you put your palm on the plaate cap of
> an on-the-air 6146 it smells like burning matches and leaves a hole
> in your hand!!
> The young guys missed all the fun Steve!!
> Pat, K9JAuAt 11:28 AM 2/28/2011, you wrote:
>>Tom,
>>
>>As long as you've unplugged the supply, there's nothing to worry about.
>>The
>>caps in there probably don't have much more than 20 volts, and you
>>probably
>>wouldn't feel anything even if you happened to put your fingers directly
>>across them. Getting zapped was much more of a reality back in the good
>>old
>>days of tubes when the voltage across a filter cap could range anywhere
>>from
>>100 to 1000 volts (more if you were playing around inside a TV set's high
>>voltage section). If you're still concerned about discharge, just poke
>>around inside the supply with a screwdriver, but I really don't think
>>there's any reason for concern.
>>
>>Steve
>>
>>----- Original Message -----
>>From: "tom behler" <[log in to unmask]>
>>To: <[log in to unmask]>
>>Sent: Monday, February 28, 2011 06:59
>>Subject: Re: RFI Saga continued
>>
>>
>> > Steve:
>> >
>> > Yeah, I was afraid of that.
>> >
>> > I can't believe they make the thing so hard to work with.
>> >
>> > When I do take the cover off, if it comes to that, I'm going to have to
>> > figure out how I'm going to work safely in there without zapping
>> > myself
>> > with the discharge from the capacitors. If anyone has some fullproof
>> > way
>> > to
>> > do that, let me know. Otherwise, I may have to get some sighted
>> > assistance
>> > over here.
>> >
>> > 73 from Tom Behler: KB8TYJ
>> >
>> > ----- Original Message -----
>> > From: "Steve Dresser" <[log in to unmask]>
>> > To: <[log in to unmask]>
>> > Sent: Sunday, February 27, 2011 10:16 PM
>> > Subject: Re: RFI Saga continued
>> >
>> >
>> > Tom,
>> >
>> > You'll probably have to take the cover off to tighten that lug. If you
>> > don't tighten it, you won't be able to use it whether you want to or
>> > not.
>> >
>> > Steve
>> >
>> > ----- Original Message -----
>> > From: "tom behler" <[log in to unmask]>
>> > To: <[log in to unmask]>
>> > Sent: Sunday, February 27, 2011 22:03
>> > Subject: RFI Saga continued
>> >
>> >
>> >> Hey, all.
>> >>
>> >> Well, I tried John's suggestion of eliminating the ground connection
>> >> between
>> >> the ground lug on the Astron power supply, and the common ground of my
>> >> window feed through panel leading to the ground rod outside, and no
>> >> joy.
>> >>
>> >> The RFI problem still exists.
>> >>
>> >> And, now, I have another little issue.
>> >>
>> >> The ground lug on the Astron, just to the right of the left-hand
>> >> corner
>> >> is
>> >> loose, and I can't seem to get it nice and tight again.
>> >>
>> >> This is not a major issue, since I may not use the ground connection
>> >> again,
>> >> but does anyone have any brilliant ideas as to how to tighten the
>> >> ground
>> >> lug
>> >> back up again, short of taking the cover off of the power supply, and
>> >> getting at it from the inside?
>> >>
>> >> It still amazes me that they made the ground connection so hard to
>> >> find,
>> >> and
>> >> so tricky to use.
>> >>
>> >> I think I'm going to bed now before I do any more damage. (grin)
>> >>
>> >> 73 from Tom Behler: KB8TYJ
>> >>
>> >
>
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