[R-390] Diode Load Tap for Audio

[Dan Merz]

Jim,  I assume you connected the amp ground to the radio ground via the
shielded wire, as prescribed by Rippel.  I have this circuit in a small box
and used it today on the 390 and it worked fine.  Boy,  what great sound
with an external amplifier.  The sparks are visible when you make the ground
connection on the 390 and no sound until you do that because,  in my case,
the amp has a two wire power plug and the chassis on the amp doesn't
necessarily have ground in common with the 390 (I should fix that, shouldn't
I).  Maybe your problem has something to do with an inadequate ground
connection on the phono cable at one end or the other.   Dan.

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of James Cottle
Sent: Tuesday, May 10, 2005 6:28 PM
To: R-390 at mailman.qth.net
Subject: [R-390] Diode Load Tap for Audio

Hmmm..Interesting. I soldered up the Diode Load tap for audio as per Chuck
Rippel's web page instructions and get no audio out!!! The R-390A I have
works great if I use headphones..but alas, not an peep from the output of
the phono plug through a 10uF NP capacitor and 470K resistor connected to
the Diode Load jumper..Anyone have any idea why?
Jim
San Francisco
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