Old Microphone Connector
 

A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector? TNX es 73 de KE9EX

Old Microphone Connector
 

"KE9EX" ) writes:
A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector? TNX es 73 de KE9EX

I always knew them as "Amphenol connectors".

Michel

Old Microphone Connector
 

In article .com,
KE9EX wrote:
A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector? TNX es 73 de KE9EX

What diameter was it?

If it was about 5/8" or so, it's an Amphenol 75 MC1 connector. They
were used often for crappy unbalanced high-Z microphone inputs on all
kinds of gear, as well as occasionally for headphones.

There was also a miniature version, the 75 PC1, which is about a quarter
inch, and was used for recorder control and for synch signals for motion
picture recording gear.

Switchcraft had both of them in the catalogue as late as 1990 or so,
which is the last time I went looking for them. Connector-World Supply
in Seattle definitely stocks them.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Old Microphone Connector
 

Scott Dorsey wrote:
There was also a miniature version, the 75 PC1, which is about a quarter
inch, and was used for recorder control and for synch signals for motion
picture recording gear.

Also shows up on some test equipment (I remember it being the AC input
for a kit VTVM... Allied? Eico?)

Tim.

Old Microphone Connector
 

I have a drawer full of them, but they're mfg by Switchcraft. Part
number on the little yellow tag reads: 250JF

KE9EX wrote:
A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector? TNX es 73 de KE9EX

Old Mic Connector Amendment
 

Amend that... it reads 2501F (not 250JF)

K3HVG wrote:

I have a drawer full of them, but they're mfg by Switchcraft. Part
number on the little yellow tag reads: 250JF

KE9EX wrote:

A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector? TNX es 73 de KE9EX

Old Microphone Connector
 

In article , K3HVG wrote:
KE9EX wrote:
A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector? TNX es 73 de KE9EX
I have a drawer full of them, but they're mfg by Switchcraft. Part
number on the little yellow tag reads: 250JF

I think you may be misreading the tag... the OP's description sounds like
a Switchcraft 2501F:

http://switchcraft.com/products/connectors-53b.html

This is the same as an Amphenol 75-MC1F, but I think the Switchcraft PN is
more common.

Old Microphone Connector
 

"KE9EX" wrote in message
oups.com...
A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector?
TNX es
73 de KE9EX


Many Amphenol connectors are now made by WPI - at the same Salem, NJ plant
that Amphenol used for decades.
http://www.wpi-interconnect.com/salem.htm

The former Amphenol product lines include the following:

a.. 17/117/177 and 777 Series D-subminiature Connectors
b.. 26 Series Blue Ribbon Rack and Panel Connectors
c.. 77/78 and 146 Series Tube and Relay Sockets
d.. 78 and 86 Series Commercial Plugs and Accessories
e.. 80 and 91 Series Microphone Connectors
f.. 126 Series Hexagonal Connectors
g.. 133/143 Printed Circuit Connectors
h.. 220/221/222 and 223 Tiny Tim® and Mighty Mite® Connectors
Additional Lines Acquired from Amphenol Include:

a.. CNI Series - Environmentally Sealed Rectangular Connectors
b.. CX Series - Various Military Connectors and Cable Assemblies
c.. H Series - Naval Sound Powered Connectors
d.. Q Series - MIL-C-55169 Submersion Proof Connectors
e.. ONO Series - Poke Home Rectangular Coax Contact Connectors
f.. PL Series - Military Circular Connectors
g.. Q2 Series - MIL-C-55169 Submersion Proof Power Plugs
h.. Q7A Series - MIL-C-55169 Submersion Proof Power Receptacles
i.. 45 Series - MIL-C-55169 Submersion Proof Power Connectors
j.. 84 Series - Miniature High Temperature "R" Connectors
k.. 89 Series - Submersion Proof Power Connectors
l.. 93 Series - Poke-Home Rectangular Connectors
m.. 94 Series - Poke-Home Rectangular Combination Contact
Connectors
n.. 126 Series - CNI Environmentally Sealed Rectangular Connectors
o.. 164 Series - Military Power Connectors

Old Microphone Connector
 

David DiGiacomo wrote:

In article , K3HVG wrote:
KE9EX wrote:
A co-worker here at the Radio Pier brought in an odd mic connector and
asked me if I knew
the formal name for it. I answered it was a "mic connector on 50-year
old Ham Radios".
Specifically, it was the type that had a dot of solder in the middle,
and a screw-on ring.
This one was made by Switchcraft. Our chief called it an "Amphenol
Mini". I didn't find one in the Switchcraft catalog, but maybe didn't
look hard enough. Was there a more specific
title for this connector? TNX es 73 de KE9EX
I have a drawer full of them, but they're mfg by Switchcraft. Part
number on the little yellow tag reads: 250JF

I think you may be misreading the tag... the OP's description sounds like
a Switchcraft 2501F:

http://switchcraft.com/products/connectors-53b.html

This is the same as an Amphenol 75-MC1F, but I think the Switchcraft PN is
more common.


I have a good supply of the shorting version of the 2501MP that
shorts an input when there is no connector screwed on. Switchcraft no
longer lists this version in their catalog.


--
Service to my country? Been there, Done that, and I've got my DD214 to
prove it.
Member of DAV #85.

Michael A. Terrell
Central Florida