Strange device PH-7?
 

I came across a little black "cube" about and inch thick and 1 x 1.25 inches
on the sides. The top is pitch black and the bottom is gray with four
tinned leads. The top is stenciled PH-7. (Philbrick?) Because it's somewhat
conical and rounded at the top it looks like it might have been cast in an
old style ice cube tray. Google doesn't help so I wonder if anyone out
there has an idea?
tnx
hank wd5jfr

Might be a Epoxied FWB rectifier. In the early days that is how they
looked and was potted. Sparks

I forgot to mention that my Fluke on diode check shows germanium voltage and
multiples in just about all combinations,..
Looking closely at it I can see what might be TO-3 edges thru the dark epoxy
...
73
hank

"Henry Kolesnik" wrote in message
...
I came across a little black "cube" about and inch thick and 1 x 1.25
inches
on the sides. The top is pitch black and the bottom is gray with four
tinned leads. The top is stenciled PH-7. (Philbrick?) Because it's
somewhat
conical and rounded at the top it looks like it might have been cast in an
old style ice cube tray. Google doesn't help so I wonder if anyone out
there has an idea?
tnx
hank wd5jfr

There was a company, forget their name, that used to package simple
modules like you describe. Like audio amps and the like. The package
was just a clear plastic with a piece of paper closing the top. Seems
like the pins were stuck in a square of styrofoam.

On Tue, 23 Dec 2003 20:59:15 -0600, "Henry Kolesnik"
wrote:

I forgot to mention that my Fluke on diode check shows germanium voltage and
multiples in just about all combinations,..
Looking closely at it I can see what might be TO-3 edges thru the dark epoxy
..
73
hank

"Henry Kolesnik" wrote in message
...
I came across a little black "cube" about and inch thick and 1 x 1.25
inches
on the sides. The top is pitch black and the bottom is gray with four
tinned leads. The top is stenciled PH-7. (Philbrick?) Because it's
somewhat
conical and rounded at the top it looks like it might have been cast in an
old style ice cube tray. Google doesn't help so I wonder if anyone out
there has an idea?
tnx
hank wd5jfr

Phil Witt wrote:
There was a company, forget their name, that used to package simple
modules like you describe. Like audio amps and the like. The package
was just a clear plastic with a piece of paper closing the top. Seems
like the pins were stuck in a square of styrofoam.

You guys are triggering my failing memory. I vaguely remember these
things...something like a black ice-cube with a little wires coming out
of them. Price was something like $1.29-$2.59. I'm struggling to think
of where I saw a magazine article about ho-rigging about three of these
together for something like an AM broadcaster or some such gizmo.
Woulda had to be PE, EI or R-TV-Experimenter in the mid-late 60s since
that was all I had access to.

-Bill M

In article ,
- - Bill - - exray@coquidotnet wrote:
Phil Witt wrote:
There was a company, forget their name, that used to package simple
modules like you describe. Like audio amps and the like. The package
was just a clear plastic with a piece of paper closing the top. Seems
like the pins were stuck in a square of styrofoam.

You guys are triggering my failing memory. I vaguely remember these
things...something like a black ice-cube with a little wires coming out
of them. Price was something like $1.29-$2.59. I'm struggling to think
of where I saw a magazine article about ho-rigging about three of these
together for something like an AM broadcaster or some such gizmo.
Woulda had to be PE, EI or R-TV-Experimenter in the mid-late 60s since
that was all I had access to.

Everybody and his brother made them. Philbrick, Hewlett-Packard, and
Opamp Labs are some of the ones that are still around today. But
ITI up in Maryland, Solid State Electronics Corporation, Modular Audio
Products. Oh yeah, and Burr-Brown got their start doing this kind of
thing. I think Stephens, the company that later made 2" tape machines,
also started out doing amplifier modules.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

Scott Dorsey wrote:

You guys are triggering my failing memory. I vaguely remember these
things...something like a black ice-cube with a little wires coming out
of them. Price was something like $1.29-$2.59. I'm struggling to think
of where I saw a magazine article about ho-rigging about three of these
together for something like an AM broadcaster or some such gizmo.
Woulda had to be PE, EI or R-TV-Experimenter in the mid-late 60s since
that was all I had access to.


Everybody and his brother made them. Philbrick, Hewlett-Packard, and
Opamp Labs are some of the ones that are still around today. But
ITI up in Maryland, Solid State Electronics Corporation, Modular Audio
Products. Oh yeah, and Burr-Brown got their start doing this kind of
thing. I think Stephens, the company that later made 2" tape machines,
also started out doing amplifier modules.
--scott


Well, in perspective, it sounds like some sort of cheapo stuff that
never really caught on...like those early TenTec modules.

-bm

OK, who made the "Mity-Amp"? A 2 watt audio amplifier potted into a block
about 1" x 2" x 3". Worked great, lsted a long time, vanished off the face
of the earth. Wish I had a few left over

"Scott Dorsey" wrote in message
...
In article ,
- - Bill - - exray@coquidotnet wrote:
Phil Witt wrote:
There was a company, forget their name, that used to package simple
modules like you describe. Like audio amps and the like. The package
was just a clear plastic with a piece of paper closing the top. Seems
like the pins were stuck in a square of styrofoam.

You guys are triggering my failing memory. I vaguely remember these
things...something like a black ice-cube with a little wires coming out
of them. Price was something like $1.29-$2.59. I'm struggling to think
of where I saw a magazine article about ho-rigging about three of these
together for something like an AM broadcaster or some such gizmo.
Woulda had to be PE, EI or R-TV-Experimenter in the mid-late 60s since
that was all I had access to.

Everybody and his brother made them. Philbrick, Hewlett-Packard, and
Opamp Labs are some of the ones that are still around today. But
ITI up in Maryland, Solid State Electronics Corporation, Modular Audio
Products. Oh yeah, and Burr-Brown got their start doing this kind of
thing. I think Stephens, the company that later made 2" tape machines,
also started out doing amplifier modules.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."

BFoelsch wrote:
OK, who made the "Mity-Amp"? A 2 watt audio amplifier potted into a block
about 1" x 2" x 3". Worked great, lsted a long time, vanished off the face
of the earth. Wish I had a few left over

Well I'm here to save you. I've got an AIWA bookshelf job that has been
killed from several directions that has such a proprietary chip still
functioning that was good for something like 600 PMPO watts, or 1-2
watts for real people. I can make you a good deal but the postage may
prove to be prohibitive.
At your pleasure, inquire within.

-BM

PolyPaks?