I currently use two microphones mixed together in proper phase, with a
homebrew tube type 2-channel audio mixer. One mic is a vintage hi-Z Astatic
D-104 and the other is an Electrovoice model 670 dynamic that otherwise
might have been tossed out because it somehow developed very poor high
Very nice combination Don. Have you decided what those big triodes tubes
are that I gave you, characteristics, etc., and speaking of Microphones have
you found one of those connectors or a part number.
As for the 12AX7s, I have always wondered if a guy could build a SS
replacement with the
I've been having some success replacing the preamp in the base of
amplified D104 mics with an FET buffer stage to ensure the crystal
element is working into a very high load impedance. See...
http://www.wd8das.net/D104-FETbuffer.gif
The 4.7k resistor in the drawing can be changed to match
.
-
-Original Message-
From: VJB wa3...@yahoo.com
To: amradio@mailman.qth.net
Sent: Wed, Sep 23, 2009 7:55 pm
Subject: Re: [AMRadio] Microphone recomendation
Steve I really enjoy that photo/text page of your transmitter project.
http://www.wd8das.net/gates.html
@mailman.qth.net
Subject: Re: [AMRadio] Microphone recomendation
On Tue, Sep 22, 2009 at 1:36 PM, Ed Sieb es...@sympatico.ca wrote:
Why operate split, Max? Most of us can operate on 3705 now.
We Canadians have been down there for years!
And us Yanks got to join the fun a few years back. I've heard Henk
found a better rackmount mixer to replace it yet. I'd like to get a
Pacific Recorders NewsMixer but haven't found one priced cheap enough
for my budget.
I would check with Mooretronix. Although they primarily service PRE
product, from time-to-time they also have reconditioned consoles
.
-
-Original Message-
From: VJB wa3...@yahoo.com
To: amradio@mailman.qth.net
Sent: Wed, Sep 23, 2009 7:55 pm
Subject: Re: [AMRadio] Microphone recomendation
Steve I really enjoy that photo/text page of your transmitter project.
http://www.wd8das.net
Amen to Steve's comments on Logitek. They run 120V. from the back panel to
the power switch on the front panel on a piece of Belden 8451 shieded pair
audio cable bundled in with the microphone lines from the back panel
connectors. Shall we say less than best engineering practices.
And...
@mailman.qth.net
Sent: Thursday, September 24, 2009 3:53:28 PM
Subject: Re: [AMRadio] Microphone recomendation
Amen to Steve's comments on Logitek. They run 120V. from the back panel to
the power switch on the front panel on a piece of Belden 8451 shieded pair
audio cable bundled in with the microphone
Not sure that Euro or Phoenix connectors were around (or at least readily
available) when these beasties were built. Strictly 1970's low tech.
Bill AD5OL
They were around in 1995 -- the last time I had seen a Logitek Mixer
installed. Other options existed then as well, including 6, 9, 12,
: amradio-boun...@mailman.qth.net [mailto:amradio-boun...@mailman.qth.net]
On Behalf Of sbjohns...@aol.com
Sent: Thursday, September 24, 2009 7:44 PM
To: amradio@mailman.qth.net
Subject: Re: [AMRadio] Microphone recomendation
This Logitek rack mixer has XLRs and TRS phone jacks on the back
Well at the risk of starting another long blowout, I would like to
meekly make the point that I find some justification in outboard
processing for AM if will add a little punch and clarity to the
sidebands and increase the average power in them. I think since AM in
the U.S. is limited to about
Steve I really enjoy that photo/text page of your transmitter project.
http://www.wd8das.net/gates.html
There's nothing like seeing a Gates on a trailer hitch carrier. I can only
imagine what people thought you were a-totin' going down the road.
That's a nice audio setup you described. Is
, 2009 8:33 PM
Subject: Re: [AMRadio] Microphone recomendation
Well at the risk of starting another long blowout, I would like to
meekly make the point that I find some justification in outboard
processing for AM if will add a little punch and clarity to the
sidebands and increase the average
On Wed, Sep 23, 2009 at 8:33 PM, Rob Atkinson ranchoro...@gmail.com wrote:
Well at the risk of starting another long blowout, I would like to
meekly make the point that I find some justification in outboard
processing for AM if will add a little punch and clarity to the
sidebands and increase
I have been lurking here and reading the discussion
which seems to me to have reduced itself down to a
kind of my daddy is better than your daddy kind of
thing.
The person who said the D104 microphone could be
thought of as a voltage generator in series with a
500 pF capacitor hit the nail on
Serviceamradio@mailman.qth.net
Subject: Re: [AMRadio] Microphone recomendation
I have been lurking here and reading the discussion
which seems to me to have reduced itself down to a
kind of my daddy is better than your daddy kind of
thing.
The person who said the D104 microphone could be
thought
Message -
From: Jim Tonne to...@comcast.net
To: Discussion of AM Radio in the Amateur Service
amradio@mailman.qth.net
Sent: Tuesday, September 22, 2009 11:07 AM
Subject: Re: [AMRadio] Microphone recomendation
I have been lurking here and reading the discussion
which seems to me to have reduced
Paul:
Although not shown through the model diminishing returns
hits pretty fast
just above 5 megohm.
That was basically my point.I seem to recall that the
D-104
folks were recommending a 5.1 megohm load. That was a
very long time ago so perhaps my memory is faulty.
The discussion had
On Mon, Sep 21, 2009 at 3:40 PM, Stevan A. White w5...@pathwayz.com wrote:
Todd, KA1KAQ wrote:
You can probably make a soup can sound decent with enough processing, so
mic
choice becomes more a choice of preference and less one of performance.
Funny but quite true, you just need a
Yes, Todd has tried to re-focus the intended discussion!
It normally is helpful. The individual indeed has a KW-1, Remembered
that he HAS a Shure-55, as the discussion went, AND is looking to get
all the specific information to work on the modulation deck - in a
one shot one kill strike, as
Wow, Such a massive amount of mails in my inbox today, I had to find out
what was going down, actually this is one of the most interesting threads
for a long time, keep it up people, great reflector, I am going to try some
of these with my own big AM (BC-610E) here in the UK, I have a Shure 55
Since I am the troublemaker that started this thread I want to say
thanks to Bob and Todd. I will admit that I have enjoyed watching this
thread veer off toward the moon and I will also say I enjoyed reading
all the different comments. I agree with Bob's summation. Right on. If I
wanted to run
Why operate split, Max? Most of us can operate on 3705 now.
We Canadians have been down there for years!
Ed, VA3ES
-
Max M0GHQ wrote:
[...] keep your ears out on 3705 over the winter months for
European stations we can split rx to
On Tue, Sep 22, 2009 at 1:30 PM, Gerald Stockinger
cliogunsm...@centurytel.net wrote:
I am going to make the recommended audio changes to the KW-1 including
jumpering the clipper and eliminating the splatter filter. I will start
with the Shure 55SH that I have and may also try other mics. But
On Tue, Sep 22, 2009 at 1:36 PM, Ed Sieb es...@sympatico.ca wrote:
Why operate split, Max? Most of us can operate on 3705 now.
We Canadians have been down there for years!
And us Yanks got to join the fun a few years back. I've heard Henk, Jean and
the gang on 3705 a few times, but could
Voices can be so radically different that it is hard to say that one
mic is a good one for everyone. And just because you like how you
sound to yourself in the headphones, that doesn't mean you really sound
good, due to the mixing of the sound coming in your ears with the sound
that travels
...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf
Of Gerald Stockinger
Sent: Monday, September 21, 2009 10:10 AM
To: AM Radio
Subject: [AMRadio] Microphone recomendation
Good morning to all. Since I will soon be new to
AM having been on SSB
since 1957 I need the benefit of others
experience
...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of Bob Peters
Sent: Monday, September 21, 2009 11:51 AM
To: 'Discussion of AM Radio in the Amateur Service'
Subject: Re: [AMRadio] Microphone recomendation
Hi Jerry... I have 2 heil PR-40 mics that I use on Am... These have
tremendous
Heil's PR-781 works great on AM and full body SSB.
Pete, wa2cwa
-Original Message-
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf
Of Gerald Stockinger
Sent: Monday, September 21, 2009 10:10 AM
To: AM Radio
Subject: [AMRadio] Microphone
#1605
CCA 98 00827
CRA 1701
W9DVM
-Original Message-
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On Behalf Of manualman
Sent: Monday, September 21, 2009 12:24 PM
To: amradio@mailman.qth.net
Subject: Re: [AMRadio] Microphone recomendation
Heil's PR-781
Funny, as I was typing my other mic comments I was thinking that a good
condition, properly adjust D-104 would be the first thing I'd try on
just about any hi-Z input BA rig, especially a Collins.
73 de W5SAW, Steve White
Phil LaMarche wrote:
I use a K3 on SSB and a 32V-3 on AM. What
...@mailman.qth.net] On Behalf
Of Phil LaMarche
Sent: Monday, September 21, 2009 11:31 AM
To: 'Discussion of AM Radio in the Amateur
Service'
Subject: Re: [AMRadio] Microphone recomendation
I use a K3 on SSB and a 32V-3 on AM. What
recommendation for the Collins.
Get rave reviews with a D-104 every time I get
] Microphone recomendation
Heil's PR-781 works great on AM and full body
SSB.
Pete, wa2cwa
-Original Message-
From: amradio-boun...@mailman.qth.net
[mailto:amradio-boun...@mailman.qth.net] On
Behalf
Of Gerald Stockinger
Sent: Monday, September 21, 2009 10:10 AM
To: AM Radio
Subject: [AMRadio
I use a Heil GM-4 hand mike on am and ssb. I also have a deep voice
and used to be in radio broadcasting. The Heil wide element has a
freq response of 60-16k with a bump at 2k to improve intelligence
while still having a good low end. The mike also has the Heil high
freq element with a
Firstly, that's one hell of a first rig for AM! Congratulations. To
me, the mic to use depends on what's been done to the KW1. Is it
stock? A later KW1? It seems to me that then you would want a Hi Z
communications mic. Besides what has been mentioned, there is the
Shure 444 and 520. The
My D-104 seems to work just fine on my unmodified Valiant I and Ranger
I. What microphones have you guys used with those rigs?
Carl Yaffey K8NU
Banjo, guitar, bass, mandolin, dobro lessons.
Pro Tools recording studio.
cyaffeyno_s...@gmail.com
614 268 6353, Columbus OH
Jerry,
There are two good Hi-Z mics that come to mind. Both are, (were), mfg
by Shure. The 55S and the 737A.
Both have a response from about 100cps to 10Kc.
I know that most folks seem to no longer consider them, BUT, Mike M.,
W3NB has won the Heavy Metal Rally several times with his Gates
] Microphone recomendation
Jerry,
There are two good Hi-Z mics that come to mind.
Both are, (were), mfg
by Shure. The 55S and the 737A.
Both have a response from about 100cps to 10Kc.
I know that most folks seem to no longer consider
them, BUT, Mike M.,
W3NB has won the Heavy Metal Rally several times
[mailto:amradio-boun...@mailman.qth.net] On Behalf
Of rbethman
Sent: Monday, September 21, 2009 1:44 PM
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio] Microphone recomendation
Jerry,
There are two good Hi-Z mics that come to mind.
Both are, (were), mfg
by Shure
On Mon, Sep 21, 2009 at 11:09 AM, Gerald Stockinger
cliogunsm...@centurytel.net wrote:
Good morning to all. Since I will soon be new to AM having been on SSB
since 1957 I need the benefit of others experience. Last week a good
amount of time was spent on audio quality so I thought I would
Earlier, in my enthusiasm for Heil mics I failed to mention (except at
the end of my post) that I like and still use Shure mics. The 55S and
737A are good hi-Z mics as are the Shure 585SD, 565SD, and 545SD (all
dual-Z) and the E-V 664 which was a very popular podium mic in the 60s
and 70s. I
Bob Peters wrote:
Also the EV-664 is a great HI Z mic
And, in a pinch, it makes a pretty decent hammer!
73, Bob W9RAN
__
Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives:
Todd, KA1KAQ wrote:
[lots of snips]
I've always used a crystal D-104 with excellent results, ... but if you do
the simple mods to the audio
of your transmitter and plug in a decent D-104 (make sure the element is in
good shape with a scope), you'll be very pleased.
An excellent place
Todd, KA1KAQ wrote:
You can probably make a soup can sound decent with enough processing,
These fellers sounded pretty good (and got paid ten dollars) for singing
into a can ;-)
http://www.youtube.com/watch?v=krwywj_gIjk
73, Bob W9RAN
The D-104 or any other crystal mic needs to work into PLENTY of megohms of
load resistance. Astatic recommends 5 megohms, but I run mine at 10 megs -
probably about as high a grid leak resistance that you can use in a tube
type preamp and maintain stable operation. I have plans in the works
pair of high-mu triodes in a push-pull mic preamp. That way, each tube
can
have its own 10 meg grid leak to allow for a 20 megohm load on the xtal.
It's possible to duplicate a similar circuit using an FET differential
amplifier with dual FETs in a single package (e.g., 2SJ109), or a
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