Bow wrote:
Hey Geoff,
I actually have this set up for SSB, but wanted to give AM a shot. I never
had this problem on SSB.
I would love to chat on 75M, but with my 40 watts (Icom IC-718 wide open on
AM) and no amplifier (the amp sets the house alarm off in PANIC mode), you
probably wouldn't
Bow wrote:
Anyone have a single 12AX7 mic preamp schematic?
I could roll my own for a change...
Here's a high-impedance microphone input circuit that might help..
http://www.qsl.net/wa5bxo/xtal-mic-eq.gif
You could get any old tube-type PA system, and use an interstage audio
driving
: Saturday, September 15, 2007 04:05
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio] Audio Warble?
Bow wrote:
Hey Geoff,
I actually have this set up for SSB, but wanted to give AM a shot. I
never had this problem on SSB.
I would love to chat on 75M, but with my 40 watts
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Bow
Sent: Saturday, September 15, 2007 8:40 PM
To: 'Discussion of AM Radio in the Amateur Service'
Subject: RE: [AMRadio] Audio Warble?
So you saying I should find me a crystal for my Knight T-60 and give it
a go?
Hmmm
Bow wrote:
So you saying I should find me a crystal for my Knight T-60 and give it a
go?
Hmmm, Screen Modulation.. ;)
I just need a crystal for the 75m band I guess...
Or a VFO.
Someone on here (WD5JKO? NE1S? KC3OL?) had plans for a DDS digital VFO.
Who was that masked AM'er?
--
Geoff/W5OMR wrote:
Someone on here (WD5JKO? NE1S? KC3OL?) had plans for a DDS digital VFO.
Who was that masked AM'er?
Tweren't me - at least not anytime soon - too many other projects! I
think Steve WD8DAS(?) has done it.
73,
-Larry/NE1S
: [AMRadio] Audio Warble?
So you saying I should find me a crystal for my Knight T-60 and give it a
go?
Hmmm, Screen Modulation.. ;)
I just need a crystal for the 75m band I guess...
Or a VFO.
Bow
W5EFR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED
This is weird but worth mentioning. I had a rig with a warble and it turned
out to be the fan. When the blades were turning, it put some crud on the
power supply. It may have been a DC to AC converter in the hub of the fan.
?Anyway, jam something into the blades and turn on the rig, if
Bow wrote:
It seems that I am getting this warble even with nothing on except the
Phantom power on the VX-2000, and the EQ, UltraFlex and Compressor turned
off.
I even get it using a dynamic mic (Shure SM-57) instead of the condenser...
I wonder if my VX-2000 is heading south?
What
--- Bow [EMAIL PROTECTED] wrote:
Steven,
Thanks for the reply.
It seems that I am getting this warble even with
nothing on except the
Phantom power on the VX-2000, and the EQ, UltraFlex
and Compressor turned
off.
I can't tell you how many hams had nothing other than
a crystal element
.
Bow
W5EFR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Geoff/W5OMR
Sent: Friday, September 14, 2007 04:33
To: Discussion of AM Radio in the Amateur Service
Subject: RE: [AMRadio] Audio Warble?
I can't tell you how many hams had nothing other than
Subject: RE: [AMRadio] Audio Warble?
I can't tell you how many hams had nothing other than a crystal element
D-104 microphone being run straight into a single 12AX7 as their first
speech stage. And 99% of 'em sound good enough to hear on the air.
You certainly don't need -all- that, to be heard
Bow - I think a LIMITER is nice for AM. Maybe you could add that
to the chain (LOL) and how about adding a T.C. Helicon CREATE
for when you want to add that Jazz Effect to your transmission, hi
hi
OK.. I was playing around with my Icom IC-718 and the audio setup that I
normally run for
Bow,
I suggest that something early in the chain is generating a low-frequency
oscillation, which is beating with your audio, particularly your lows,
generating a form of intermodulation distortion. . Maybe something in the
Behringer VX2000 Mic Preamp is either taking off, or maybe it's
south?
Bow
W5EFR
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Stevan A. White
Sent: Thursday, September 13, 2007 00:13
To: AM Radio Mail List
Subject: Re: [AMRadio] Audio Warble?
I listened to your audio clip. It really sounds to me like all your FX
It seems that I am getting this warble even with nothing on except the
Phantom power on the VX-2000, and the EQ, UltraFlex and
Compressor turned
off.
It was my impession from listening to the recording that I could hear
something going on before you turned on the expander in the VX-2000.
If
in the Amateur Service'
Subject: RE: [AMRadio] Audio Warble?
It seems that I am getting this warble even with nothing on except the
Phantom power on the VX-2000, and the EQ, UltraFlex and Compressor
turned off.
It was my impession from listening to the recording that I could hear
something going
OK.. I was playing around with my Icom IC-718 and the audio setup that I
normally run for SSB.
I was playing around with AM, because I have never used it for AM before,
and recording the audio, because someone on an internet forum actually said
the outboard processing is a waste on AM...
I listened to your audio clip. It really sounds to me like all your FX
units are fighting each other to some degree. Example: I can tell you
have a fair amount of de-essing set on your VX2000, you also have a good
amount of high-mid and high EQ set on your PEQ-2200. This in itself
creates
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