[Elecraft] Keiths idea on audio test two rigs

[Darwin, Keith]

The first time I hooked up 2 rigs like this and listened I was
absolutely amazed at how differently they sounded.  I've since done this
with several different rigs:

TS-830s,
IC-735,
Omni V,
Drake R-4A
Drake 2B
K1
K2

After all the testing I ended up with 1 rig - the K2.  That has since
been replaced my the K3.  That 2B really did sound smooth & sweet though
as did the K1.  The rest of the rigs no longer interest me in the least.

- Keith N1AS -
- K3 711 -


-----Original Message-----
From: elecraft-bounces at mailman.qth.net
[mailto:elecraft-bounces at mailman.qth.net] On Behalf Of dw
Sent: Thursday, April 02, 2009 12:37 PM
To: Elecraft_List
Subject: [Elecraft] Keiths idea on audio test two rigs

KEITH THANK!!
I do have a small adio mixer I could use!
And I could also jury-rig up a switch to toggle the headphones between
the two.
Thanks

Duane

Here's my technique:

1.  Connect both rigs to the same antenna, through some sort of
(jury-rigged) Y arrangement.
2.  Feed the speaker outputs from both rigs into separate inputs on my
Behringer or Mackie mixer.
3.  Set rig's AF gains to about 1/2 way point to improve AF S/N ratio.
4.  Trim the inputs on the mixing board to get both channels to the same
level.
5.  Set both channel EQ control to the same (flat).
5.  Plug headphones into the mixer.
6.  Tune both rigs to the same signal.

Now, to compare the rigs, you adjust the channel volume controls on the
mixer.  Listen to each channel by itself or put one rig in the L ear and
one in the R.

You will definitely hear differences that you wouldn't hear if you
listened to one rig for 30 minutes, then disconnected, hooked up the 2nd
rig and listened for 30 minutes.

Oh, wait, you wanted a suggestion that didn't involve any equipment.

- Keith N1AS -
- K3 711 -
--
 Bw_dw at fastmail.net

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