He replaced the tube.
I just fixed a T-4XC that exhibited a cold or broken solder joint this month,
in 2013. Joint was soldered in 1977.
Not quite the old "House, MD" maxim of it never being Lupus.
If swapping the tube brings no resolution, check all the connections. That
means both tube socket and all solder joints.
Still good maxims to live by.
Steve Wedge, W1ES/4
Time flies like an arrow; fruit flies like a banana.
All my computers have my signature with various pearls of wisdom appended
thereto.
From: Rich Jones
Sent: Friday, October 11, 2013 7:13 PM
To: drakelist@zerobeat.net
Subject: Re: [Drakelist] Drakelist Digest, Vol 64, Issue 5
You ever notice when trouble the R4A, it always says, its the tube....its the
tube. I have one, and yes, it is always the tube. Get a new tube. 73 Rich
K8UV
On Friday, October 11, 2013 12:00 PM, "drakelist-requ...@zerobeat.net"
<drakelist-requ...@zerobeat.net> wrote:
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Today's Topics:
1. R4A erratic audio output (k5eh)
----------------------------------------------------------------------
Message: 1
Date: Thu, 10 Oct 2013 16:36:06 -0500
From: k5eh <k...@cox.net>
To: drakelist@zerobeat.net
Subject: [Drakelist] R4A erratic audio output
Message-ID: <52571dc6.8070...@cox.net>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
R4a s/n 5404b has erratic, changing audio levels. 6EH5 (V7) gets very
HOT! Pin voltages and resistance readings a little off ( IAW tube chart
in alignment procedure). Can tap tube and change audio and signal
levels. Changed tube with no improvement. Previous posts show very
different voltage and resistance readings from those in my manual. I
have the 11 tube version. Open to suggestions and comments.
I refer to this GREAT site daily, and hope to be a constructive
contributor in the future.
73, Jim, K5EH
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