On Wed, 6 Jul 2011 22:34:15 -0700, Richard Knoppow wrote:
> I am somewhat surprized that the frequency responce is
>affected enough to be heard through the rather narrow and
>sharp filters in modern SSB rigs.
Depends on the rig and the D-104, to a degree. A non-amped D-104 on a rig with
50
On Thu, 7 Jul 2011 06:51:00 -0400, Paul Christensen wrote:
>The stock Astatic 2-stage preamp is an engineering disaster IMO.
So, I'm not too far off the mark in calling it an"abomination"? :)
Generally speaking, I'm against preamped mics except in the case of rigs that
require them (i.e., radi
*Thanks Guys for the help, I will install a 470K resistor in the Mic.
I appreciated all the feedback but remember I said I was a pretty good
Toolmaker/Machinist not a electronics man so a LOT of the reply's was WAY
above this Old Country Boy's head.
*
*Thanks
*
Woody
___
Note: if the high level input pin is used, the load is 470K + the low
level
impedance. I use 470K for the series resitor, for a total of around a meg.
Jim, Excellent point.
If you were going to use the D104 with a modern DSP-based transceiver, I
would have suggested gutting the Astatic preamp
- Original Message -
From: "Jim Shorney"
To:
Sent: Wednesday, July 06, 2011 9:16 PM
Subject: Re: [Drakelist] D104 and TR7
On Wed, 6 Jul 2011 22:26:44 -0500, Grant Youngman wrote:
That's true. But if one has an amplified stand it will
work fine, too.
Better with
On Wed, 6 Jul 2011 21:33:11 -0400, Paul Christensen wrote:
>You can add a 100K resistor in the D104's + mic lead. That will help to
>unload the crystal element from the TR-7's moderately low input Z.
Note: if the high level input pin is used, the load is 470K + the low level
impedance. I use
On Wed, 6 Jul 2011 21:23:08 -0500, Grant Youngman wrote:
>Why wouldn't you use the preamp?
Because you don't need it, and it can cause more trouble than it's worth.
>The preamp eliminates the need to be concerned about matching the input Z of
>the radio and eliminates the effect of the input Z
On Wed, 6 Jul 2011 22:26:44 -0500, Grant Youngman wrote:
>That's true. But if one has an amplified stand it will work fine, too.
Better without. It's extra gain that is not needed, and it adds another failure
point and a point for feedback and distortion to enter. I've gotten excellent
results b
That's true. But if one has an amplified stand it will work fine, too.
Sent from my iPhone
On Jul 6, 2011, at 10:13 PM, K9sqg wrote:
> Grant,
>
> There is no real need for the pre-amp circuit when the D-104 is used with the
> TR-7, more than enough gain exists. Don't have to replace the bat
----
> From: Woody
> To: Drake List
> Sent: Wed, Jul 6, 2011 9:19 pm
> Subject: [Drakelist] D104 and TR7
>
> Does any one know the mod to make the 104 work well with the TR7, I was told
> you added a resistor of some value but they didn't know the value or where to
>
al Message-
From: Woody
To: Drake List
Sent: Wed, Jul 6, 2011 9:19 pm
Subject: [Drakelist] D104 and TR7
Does any one know the mod to make the 104 work well with the TR7, I was told
you added a resistor of some value but they didn't know the value or where to
put it. I need to know it a
to use the D104
with a modern DSP-based transceiver, I would have suggested gutting the Astatic
preamp and replace it with one of the FET buffer circuits shown on my QRZ.com
page.
Paul, W9AC
- Original Message -
From: Woody
To: Drake List
Sent: Wednesday, July 06, 2011 9:1
*Does any one know the mod to make the 104 work well with the TR7, I was
told you added a **resistor of some value but they didn't know the value or
where to put it. I need to know it at the Mod's for Dummies level, I was a
Toolmaker not a electronics man, well just enough to be dangerous and stay
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