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 othe
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 same
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
freq
From: 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
.
-
-Original Message-
From: BILL GUYGER
To: Discussion of AM Radio in the Amateur Service
Sent: Thu, Sep 24, 2009 4:07 pm
Subject: Re: [AMRadio] Microphone recomendation
Not sure that Euro or Phoenix connectors were around (or at least
readily
available) when these beasties were built
> 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, a
er 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 lines
> 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
". Kind of handy device
overall with all the audio routing, monitor switching, etc. but they make me
cringe.
Bill AD5OL
From: "sbjohns...@aol.com"
To: amradio@mailman.qth.net
Sent: Thursday, September 24, 2009 2:31:40 PM
Subject: Re: [AMRadio]
> 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 PR&E
product, from time-to-time they also have reconditioned consoles av
Just for curiosity, has anyone built and used the homebrew boom mic and used it
from the article in QST a few years ago?
-Original Message-
From: Todd, KA1KAQ
Sent: Tuesday, September 22, 2009 12:56 PM
To: Discussion of AM Radio in the Amateur Service
Subject: Re: [AMRadio] Microphone
ntertainment value.
-
-Original Message-
From: VJB
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.htm
On Wed, Sep 23, 2009 at 8:33 PM, Rob Atkinson 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 the average power
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 averag
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 tha
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 hal
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
On Tue, Sep 22, 2009 at 1:36 PM, Ed Sieb 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 never quite make t
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. B
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
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
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
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, a
On Mon, Sep 21, 2009 at 3:40 PM, Stevan A. White 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 "decent" s
On Tue, Sep 22, 2009 at 11:56 AM, Jim Tonne wrote:
>
> The discussion had seemingly gotten into a "runaway" mode
> where folks were telling everyone how to make the input
> impedance super duper high. I just sat here shaking
> my head and wondering why :-)
>
Even more odd since the original q
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 h
- Original Message -
From: "Jim Tonne"
To: "Discussion of AM Radio in the Amateur Service"
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
ubject: 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 of as a voltage genera
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 t
> 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 JFE
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 to
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
__
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 pl
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: http://www.mail-archive.c
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
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 wou
: amradio-boun...@mailman.qth.net
> [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 t
It's also a great Lo-Z mic too.
I use it on my FT-990 with excellent results.
Ed, VA3ES
Bob Peters wrote:
Also the EV-664 is a great HI Z mic
__
Our Main Website: http://www
] 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
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 T
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
http://www.carl-yaffey.co
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 5
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 s
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. Last week a good
> amount of time was spent on audio quality so I
&g
...@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 tim
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 recomme
#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 P
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. Last week a good
> amount of time was spent on audio quality so I
> thought I
...@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
-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 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
exper
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 ask here.
The rig is a Collins KW-1. I need a good quality (broadcast if you will)
micropho
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