[AMRadio] D 104 mic element

Discussion:

Robert Sauvan

2013-08-24 16:05:34 UTC

Hi all,
I am in need of a replacement mic element for a D104. I picked a mic up
at a swap meet this past weekend and it seems to have a bad mic element.
I am looking for anyone who might have a spare laying around that they
would be willing to part with. My next step might be to try and replace
it with one of those Radio shack elements that I have read about, but
want that as a last resort. Anyone have an opinion on those elements?

Thanks-Bob-W0YBS

Robert

2013-08-25 00:02:25 UTC

Permalink

-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>

NO NO on the Rat Shack ones. I've found the (near) best replacements
when compared to the Astatic original is one from Mouser Electronics.
Almost the same size and in the crystal variety if memory serves me
correctly. Response charts bout the same also. Fellas help me out with
the Mouser info as I can't find mine presently for Bob. Bob, it's kinda
like, if your date says she's sick, shoot, ask her sister to go barn
dancing that Saturday night as she'll be close enough. Better that
giving up and having to end up watch the cows munch grass during the
afternoon and growing overnight. Hey, even in the best of ham radio
families the other members will never know. In addendum, Bob, in all my
years in ham radio I've never run across a ham who could tell how old my
D-104 crystal microphone element was in it's life cycle nor how many
actual crystals were housed in it case indicating mv output. Shoot most
of us in our well ham radio seasoned time line nearing end of the paper
roll can't even discern our birth given names when supper calls go out
indicating it's on the table getting cold. That's why supper bells on
the back or front porch (your bride's choice) that rang out CQ were
invented in the first place. <grin>

73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a mic
up at a swap meet this past weekend and it seems to have a bad mic
element. I am looking for anyone who might have a spare laying around
that they would be willing to part with. My next step might be to try
and replace it with one of those Radio shack elements that I have read
about, but want that as a last resort. Anyone have an opinion on those
elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives: http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Dave Mayfield W9WRL

2013-08-25 12:54:55 UTC

Permalink

Mouser has not stocked these for a long time now, if you are talking
about the Kobitone 25LM022 was the part number.

Post by Robert
-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>
NO NO on the Rat Shack ones. I've found the (near) best replacements
when compared to the Astatic original is one from Mouser Electronics.
Almost the same size and in the crystal variety if memory serves me
correctly. Response charts bout the same also. Fellas help me out
with the Mouser info as I can't find mine presently for Bob. Bob,
it's kinda like, if your date says she's sick, shoot, ask her sister
to go barn dancing that Saturday night as she'll be close enough.
Better that giving up and having to end up watch the cows munch grass
during the afternoon and growing overnight. Hey, even in the best of
ham radio families the other members will never know. In addendum,
Bob, in all my years in ham radio I've never run across a ham who
could tell how old my D-104 crystal microphone element was in it's
life cycle nor how many actual crystals were housed in it case
indicating mv output. Shoot most of us in our well ham radio seasoned
time line nearing end of the paper roll can't even discern our birth
given names when supper calls go out indicating it's on the table
getting cold. That's why supper bells on the back or front porch
(your bride's choice) that rang out CQ were invented in the first
place. <grin>
73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a mic
up at a swap meet this past weekend and it seems to have a bad mic
element. I am looking for anyone who might have a spare laying around
that they would be willing to part with. My next step might be to try
and replace it with one of those Radio shack elements that I have
read about, but want that as a last resort. Anyone have an opinion on
those elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives: http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2242 / Virus Database: 3211/6106 - Release Date: 08/25/13

--
73 Dave W9WRL
http://www.w9wrl.com/w9wrl
http://www.facebook.com/w9wrl
http://www.facebook.com/qchams
Twitter @w9wrl

Warren Elly

2013-08-25 13:17:35 UTC

Permalink

I have a replacement element kit for D-104... from RB Micro... K0FR... Asking $20 plus shipping...

WWW.rbmicro.com

73, Warren W1GUD

Mouser has not stocked these for a long time now, if you are talking about the Kobitone 25LM022 was the part number.

Post by Robert
-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>
NO NO on the Rat Shack ones. I've found the (near) best replacements when compared to the Astatic original is one from Mouser Electronics. Almost the same size and in the crystal variety if memory serves me correctly. Response charts bout the same also. Fellas help me out with the Mouser info as I can't find mine presently for Bob. Bob, it's kinda like, if your date says she's sick, shoot, ask her sister to go barn dancing that Saturday night as she'll be close enough. Better that giving up and having to end up watch the cows munch grass during the afternoon and growing overnight. Hey, even in the best of ham radio families the other members will never know. In addendum, Bob, in all my years in ham radio I've never run across a ham who could tell how old my D-104 crystal microphone element was in it's life cycle nor how many actual crystals were housed in it case indicating mv output. Shoot most of us in our well ham radio seasoned time line nearing end of the paper roll can't even discern our birth given names when supper calls go out indicating it's on the table getting cold. That's why supper bells on the back or front porch (your bride's choice) that rang out CQ were invented in the first place. <grin>
73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a mic up at a swap meet this past weekend and it seems to have a bad mic element. I am looking for anyone who might have a spare laying around that they would be willing to part with. My next step might be to try and replace it with one of those Radio shack elements that I have read about, but want that as a last resort. Anyone have an opinion on those elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives: http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

--
73 Dave W9WRL
http://www.w9wrl.com/w9wrl
http://www.facebook.com/w9wrl
http://www.facebook.com/qchams
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives: http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Robert Sauvan

2013-08-25 13:20:37 UTC

Permalink

It looks like RB Micro out of Greeley Colorado has the elements that
Mouser used to carry. They even reference that in their website.$10.00.
You cant beat that.

Thanks to all for their suggestions and help.

73-Bob-W0YBS

Post by Dave Mayfield W9WRL
Mouser has not stocked these for a long time now, if you are talking
about the Kobitone 25LM022 was the part number.

Post by Robert
-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>
NO NO on the Rat Shack ones. I've found the (near) best replacements
when compared to the Astatic original is one from Mouser
Electronics. Almost the same size and in the crystal variety if
memory serves me correctly. Response charts bout the same also.
Fellas help me out with the Mouser info as I can't find mine
presently for Bob. Bob, it's kinda like, if your date says she's
sick, shoot, ask her sister to go barn dancing that Saturday night as
she'll be close enough. Better that giving up and having to end up
watch the cows munch grass during the afternoon and growing
overnight. Hey, even in the best of ham radio families the other
members will never know. In addendum, Bob, in all my years in ham
radio I've never run across a ham who could tell how old my D-104
crystal microphone element was in it's life cycle nor how many actual
crystals were housed in it case indicating mv output. Shoot most of
us in our well ham radio seasoned time line nearing end of the paper
roll can't even discern our birth given names when supper calls go
out indicating it's on the table getting cold. That's why supper
bells on the back or front porch (your bride's choice) that rang out
CQ were invented in the first place. <grin>
73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a mic
up at a swap meet this past weekend and it seems to have a bad mic
element. I am looking for anyone who might have a spare laying
around that they would be willing to part with. My next step might
be to try and replace it with one of those Radio shack elements that
I have read about, but want that as a last resort. Anyone have an
opinion on those elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2012.0.2242 / Virus Database: 3211/6106 - Release Date: 08/25/13

wrl

2013-08-25 19:23:12 UTC

Permalink

The 25LM022 is the smaller 35MM element and they work fine, but the
best one was the 25LM024 it is 50mm in size and sounds better, these are
the best ones to have.

Data sheet 25LM024
http://elcodis.com/parts/2056292/25LM024.html#datasheet

Data sheet 25LM022 http://www.rbmicro.com/prodgfx/25LM022.pdf

Post by Robert Sauvan
It looks like RB Micro out of Greeley Colorado has the elements that
Mouser used to carry. They even reference that in their
website.$10.00. You cant beat that.
Thanks to all for their suggestions and help.
73-Bob-W0YBS

Post by Dave Mayfield W9WRL
Mouser has not stocked these for a long time now, if you are talking
about the Kobitone 25LM022 was the part number.

Post by Robert
-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>
NO NO on the Rat Shack ones. I've found the (near) best
replacements when compared to the Astatic original is one from Mouser
Electronics. Almost the same size and in the crystal variety if
memory serves me correctly. Response charts bout the same also.
Fellas help me out with the Mouser info as I can't find mine
presently for Bob. Bob, it's kinda like, if your date says she's
sick, shoot, ask her sister to go barn dancing that Saturday night as
she'll be close enough. Better that giving up and having to end up
watch the cows munch grass during the afternoon and growing
overnight. Hey, even in the best of ham radio families the other
members will never know. In addendum, Bob, in all my years in ham
radio I've never run across a ham who could tell how old my D-104
crystal microphone element was in it's life cycle nor how many actual
crystals were housed in it case indicating mv output. Shoot most of
us in our well ham radio seasoned time line nearing end of the paper
roll can't even discern our birth given names when supper calls go
out indicating it's on the table getting cold. That's why supper
bells on the back or front porch (your bride's choice) that rang out
CQ were invented in the first place. <grin>
73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a
mic up at a swap meet this past weekend and it seems to have a bad
mic element. I am looking for anyone who might have a spare laying
around that they would be willing to part with. My next step might
be to try and replace it with one of those Radio shack elements that
I have read about, but want that as a last resort. Anyone have an
opinion on those elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
http://www.qsl.net/donate.html

Robert Sauvan

2013-08-25 21:59:03 UTC

Permalink

Looks like I ordered the 25LM022 .But hey, its better than the dead one
in the mic right now..

Thanks-Bob-W0YBS

Post by wrl
The 25LM022 is the smaller 35MM element and they work fine, but the
best one was the 25LM024 it is 50mm in size and sounds better, these
are the best ones to have.
Data sheet 25LM024
http://elcodis.com/parts/2056292/25LM024.html#datasheet
Data sheet 25LM022 http://www.rbmicro.com/prodgfx/25LM022.pdf

Post by Dave Mayfield W9WRL
Mouser has not stocked these for a long time now, if you are talking
about the Kobitone 25LM022 was the part number.

Post by Robert
-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>
NO NO on the Rat Shack ones. I've found the (near) best
replacements when compared to the Astatic original is one from
Mouser Electronics. Almost the same size and in the crystal
variety if memory serves me correctly. Response charts bout the
same also. Fellas help me out with the Mouser info as I can't find
mine presently for Bob. Bob, it's kinda like, if your date says
she's sick, shoot, ask her sister to go barn dancing that Saturday
night as she'll be close enough. Better that giving up and having
to end up watch the cows munch grass during the afternoon and
growing overnight. Hey, even in the best of ham radio families the
other members will never know. In addendum, Bob, in all my years in
ham radio I've never run across a ham who could tell how old my
D-104 crystal microphone element was in it's life cycle nor how
many actual crystals were housed in it case indicating mv output.
Shoot most of us in our well ham radio seasoned time line nearing
end of the paper roll can't even discern our birth given names when
supper calls go out indicating it's on the table getting cold.
That's why supper bells on the back or front porch (your bride's
choice) that rang out CQ were invented in the first place. <grin>
73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a
mic up at a swap meet this past weekend and it seems to have a bad
mic element. I am looking for anyone who might have a spare laying
around that they would be willing to part with. My next step might
be to try and replace it with one of those Radio shack elements
that I have read about, but want that as a last resort. Anyone
have an opinion on those elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Emil Dular

2013-08-25 21:27:24 UTC

Permalink

That element worked well in many of the older crystal mikes. I used it to
repair of few of them, but alas, Kobitone has discontinued it and it is
nowhere to be found at any of the usual places like Mouser, Newark, Allied,
or anyplace that used to catalog it.

...and I have used the last of my stash. Anyone find a suitable replacement
other than the junk blue plastic ones peddled on eBay it would be good to
know.

Emil WD4SCZ
----- Original Message -----
From: "Dave Mayfield W9WRL" <wrl at gwltd.com>
To: "Robert" <w4rl at bellsouth.net>
Cc: <amradio at mailman.qth.net>
Sent: Sunday, 25 August, 2013 08:54
Subject: Re: [AMRadio] Fwd: Re: D 104 mic element

Mouser has not stocked these for a long time now, if you are talking about
the Kobitone 25LM022 was the part number.

Post by Robert
-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>
NO NO on the Rat Shack ones. I've found the (near) best replacements
when compared to the Astatic original is one from Mouser Electronics.
Almost the same size and in the crystal variety if memory serves me
correctly. Response charts bout the same also. Fellas help me out with
the Mouser info as I can't find mine presently for Bob. Bob, it's kinda
like, if your date says she's sick, shoot, ask her sister to go barn
dancing that Saturday night as she'll be close enough. Better that giving
up and having to end up watch the cows munch grass during the afternoon
and growing overnight. Hey, even in the best of ham radio families the
other members will never know. In addendum, Bob, in all my years in ham
radio I've never run across a ham who could tell how old my D-104 crystal
microphone element was in it's life cycle nor how many actual crystals
were housed in it case indicating mv output. Shoot most of us in our
well ham radio seasoned time line nearing end of the paper roll can't
even discern our birth given names when supper calls go out indicating
it's on the table getting cold. That's why supper bells on the back or
front porch (your bride's choice) that rang out CQ were invented in the
first place. <grin>
73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a mic up
at a swap meet this past weekend and it seems to have a bad mic element.
I am looking for anyone who might have a spare laying around that they
would be willing to part with. My next step might be to try and replace
it with one of those Radio shack elements that I have read about, but
want that as a last resort. Anyone have an opinion on those elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Bill Guyger

2013-08-25 21:41:57 UTC

Permalink

FWIW Heil Sound makes a dynamic element for D-104's. Bob Heil is a ham

Bill AD5OL

Sent from my iPhone

That element worked well in many of the older crystal mikes. I used it to repair of few of them, but alas, Kobitone has discontinued it and it is nowhere to be found at any of the usual places like Mouser, Newark, Allied, or anyplace that used to catalog it.
...and I have used the last of my stash. Anyone find a suitable replacement other than the junk blue plastic ones peddled on eBay it would be good to know.
Emil WD4SCZ
----- Original Message ----- From: "Dave Mayfield W9WRL" <wrl at gwltd.com>
To: "Robert" <w4rl at bellsouth.net>
Cc: <amradio at mailman.qth.net>
Sent: Sunday, 25 August, 2013 08:54
Subject: Re: [AMRadio] Fwd: Re: D 104 mic element

Mouser has not stocked these for a long time now, if you are talking about the Kobitone 25LM022 was the part number.

Post by Robert
-------- Original Message --------
Subject: Re: [AMRadio] D 104 mic element
Date: Sat, 24 Aug 2013 19:01:16 -0500
From: Robert <w4rl at bellsouth.net>
To: Robert Sauvan <rsauvan at beyondbb.com>
NO NO on the Rat Shack ones. I've found the (near) best replacements when compared to the Astatic original is one from Mouser Electronics. Almost the same size and in the crystal variety if memory serves me correctly. Response charts bout the same also. Fellas help me out with the Mouser info as I can't find mine presently for Bob. Bob, it's kinda like, if your date says she's sick, shoot, ask her sister to go barn dancing that Saturday night as she'll be close enough. Better that giving up and having to end up watch the cows munch grass during the afternoon and growing overnight. Hey, even in the best of ham radio families the other members will never know. In addendum, Bob, in all my years in ham radio I've never run across a ham who could tell how old my D-104 crystal microphone element was in it's life cycle nor how many actual crystals were housed in it case indicating mv output. Shoot most of us in our well ham radio seasoned time line nearing end of the paper roll can't even discern our birth given names when supper calls go out indicating it's on the table getting cold. That's why supper bells on the back or front porch (your bride's choice) that rang out CQ were invented in the first place. <grin>
73 de Robert W4RL

Post by Robert Sauvan
Hi all,
I am in need of a replacement mic element for a D104. I picked a mic up at a swap meet this past weekend and it seems to have a bad mic element. I am looking for anyone who might have a spare laying around that they would be willing to part with. My next step might be to try and replace it with one of those Radio shack elements that I have read about, but want that as a last resort. Anyone have an opinion on those elements?
Thanks-Bob-W0YBS
______________________________________________________________
Our Main Website: http://www.amfone.net
AMRadio mailing list
Searchable Archives: http://www.mail-archive.com/amradio at mailman.qth.net/
List Rules (must read!): http://w5ami.net/amradiofaq.html
List Home: http://mailman.qth.net/mailman/listinfo/amradio
Post: AMRadio at mailman.qth.net
To unsubscribe, send an email to amradio-request at mailman.qth.net with
the word unsubscribe in the message body.
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html

Robert Nickels

2013-08-25 22:01:11 UTC

Permalink

Just thought I'd pass along what I think is a terrific deal on a little
mic preamp:

http://www.amazon.com/ART-Tube-Studio-Mic-Preamp/dp/B0002E50MC/

I haven't done any testing with RF present yet but the audio quality is
excellent as is the range of connectors and gain options (up to
60dB). It sounds nice and clean with a low-z mic, and if you need a
bit of audio gain, you sure can't build a preamp for this kind of $.

73, Bob W9RAN