] Drake L-7 arc - plate
capacitor
issue?
To: drakelist@zerobeat.net
drakelist@zerobeat.net
Message-ID: 20100518034250.eab1b31b...@mail01.inebraska.com
Content-Type: text/plain; charset=iso-8859-1
All the amp gurus must still be recovering from
Dayton.
Bill, you didn't
mention if you
In a message dated 5/18/2010 10:38:27 P.M. Eastern Daylight Time,
billdz@yahoo.com writes:
http://www.youtube.com/watch?v=iJRyNQnkEWA
I notice 2 things:
The tube nearest the transformer is displaying a red plate before the tube
nearest the side panel and it appears to be more
of the camera angle. If not, what could it mean?
73, Bill NZ5N
--- On Wed, 5/19/10, w4...@aol.com w4...@aol.com wrote:
From: w4...@aol.com w4...@aol.com
Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video
To: billdz@yahoo.com, drakelist@zerobeat.net
Date: Wednesday, May 19
From: drakelist-boun...@zerobeat.net
[mailto:drakelist-boun...@zerobeat.net] On Behalf Of Bill Dzurilla
Sent: Wednesday, May 19, 2010 3:35 PM
To: drakelist@zerobeat.net; w4...@aol.com
Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with
video
Thanks, John. I noticed the black
You might want to check the impedance of your Heathkit Cantenna.
===
Also, the brass clamps on each end of the Cantenna resistor have a tendency
to become (age or work hardened) brittle and break causing an intermittent
or an open.
K7DFW
..._._
, 2010 3:20 pm
Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video
In a message dated 5/18/2010 10:38:27 P.M. Eastern Daylight Time,
billdz@yahoo.com writes:
http://www.youtube.com/watch?v=iJRyNQnkEWA
I notice 2 things:
The tube nearest the transformer
/10, k9...@aol.com k9...@aol.com wrote:
From: k9...@aol.com k9...@aol.com
Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor issue? Now with video
To: w4...@aol.com, billdz@yahoo.com, drakelist@zerobeat.net
Date: Wednesday, May 19, 2010, 5:09 PM
Caution is in order when testing the amp
Jim,
The arc occurred with a dummy load, so the antenna system is not to blame.
73, Bill
From: Jim Shorney jshor...@inebraska.com
Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor
issue?
To: drakelist@zerobeat.net
drakelist@zerobeat.net
Message-ID: 20100518034250.eab1b31b...@mail01
, advice?
73, Bill NZ5N
issue?
From: Jim Shorney jshor...@inebraska.com
Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor
issue?
To: drakelist@zerobeat.net
drakelist@zerobeat.net
Message-ID: 20100518034250.eab1b31b...@mail01.inebraska.com
Content-Type: text/plain; charset=iso-8859-1
and
caused the arc, I'm not sure how to proceed, because output was very low with
the Load cap set at 5.
Comments, ideas, advice?
73, Bill NZ5N
issue?
From: Jim Shorneyjshor...@inebraska.com
Subject: Re: [Drakelist] Drake L-7 arc - plate capacitor
issue?
To: drakelist@zerobeat.net
drakelist
All the amp gurus must still be recovering from Dayton. Bill, you didn't
mention if you were testing with an antenna or a dummy load.
73
-Jim
On Sun, 16 May 2010 09:19:35 -0700 (PDT), Bill Dzurilla wrote:
I opened up the amp and everything looks OK, except for one of the 25 or so
stators on
I opened up the amp and everything looks OK, except for one of the 25 or so
stators on the plate tuning capacitor has graffiti-like white traces on it. I
suspect this is the source of the 80m arcing, as the rotor does not the spot
with the traces on 40m and up. I have not tried the amp on
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