- Original Message -
From: Charles Bostian bost...@vt.edu
To: drakelist@zerobeat.net
Sent: Friday, November 14, 2014 1:58 PM
Subject: [Drakelist] Drake R4B 5595 kHz oscillator/mixer
I am trying to bring my old R4B/T4XB combination back to
life after about
35 years of non-use
- From: Charles Bostian bost...@vt.edu
To: drakelist@zerobeat.net
Sent: Friday, November 14, 2014 1:58 PM
Subject: [Drakelist] Drake R4B 5595 kHz oscillator/mixer
I am trying to bring my old R4B/T4XB combination back to life after about
35 years of non-use.
The 5595 kHz oscillator part
My thanks to everyone who has sent me ideas. At one of your suggestions I
built a simple circuit to check the xtal performance. It works fine -
series resonant at 5563.3 kHz and parallel resonant between 5599.1 and
5599.3 kHz. So the problem must be in the four caps I haven't checked
yet.
To: drakelist@zerobeat.net
Sent: Friday, November 14, 2014 1:58 PM
Subject: [Drakelist] Drake R4B 5595 kHz oscillator/mixer
I am trying to bring my old R4B/T4XB combination back to life after
about
35 years of non-use.
The 5595 kHz oscillator part of the second mixer 12BE6 circuit
I am trying to bring my old R4B/T4XB combination back to life after about
35 years of non-use.
The 5595 kHz oscillator part of the second mixer 12BE6 circuit does not
oscillate. I have tried several tubes with no effect. As far as I can
determine, the tube is functioning normally and I can make
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