fake germanium transistor?

[asdf]

I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case, I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold on
the bay.

On a similar subject, I have somewhere a bag of rather strange germanium
transistors in TO-5 case I got at a surplus store years ago and never
identified: PNP with grounded base and low (very consistent among them)
hFe, very long leads. I don't have their part name here but I recall
digging the net to no avail for hours as it's very likely a custom
product. The grounded base suggests an use as common base amplifiers in
RF, any thoughts?


Thanks!

 

[Baron]

asdf Inscribed thus:

I stumbled upon this one.

http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case,
I never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold
on the bay.

I agree ! I do have several genuine AC128 (Mullard). I've never seen
one in that style case.

On a similar subject, I have somewhere a bag of rather strange
germanium transistors in TO-5 case I got at a surplus store years ago
and never identified: PNP with grounded base and low (very consistent
among them) hFe, very long leads. I don't have their part name here
but I recall digging the net to no avail for hours as it's very likely
a custom product. The grounded base suggests an use as common base
amplifiers in RF, any thoughts?


Thanks!

There are all sorts of weird and exotic devices kicking around. Over
the past few days I've been searching the web for an "OT114" device
specifications. I've a couple of dozen new unpackaged ones in a box.
The best guess from playing with one or two is that they are triacs.

Happy new year all.

--
Best Regards:
Baron.

 

[Cydrome Leader]

asdf <asdf@nospam.com> wrote:

I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case, I
never saw them in what appears a TO-5 one.

those cases look too fresh and new too.

 

[Ian Field]

"asdf" <asdf@nospam.com> wrote in message
news:kbs21j$gin$1@speranza.aioe.org...

I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case, I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold on
the bay.

AFAIK all the Mullard AC1xx transistors were in TO1 case, some germanium
(with AC prefix) from continental Europe had a smaller diameter, like a
*VERY* tall TO18 and hermetic flange.

The Motorola branded TO5 AC128s could very well be Kosher - its hard to see
counterfeiters faking a device in a case style it was never released in. The
AC126/127/128 were often found clamped to a heatsink - a different case
style would complicate things.

 

[legg]

On Mon, 21 Jan 2013 02:26:15 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"asdf" <asdf@nospam.com> wrote in message
news:kbs21j$gin$1@speranza.aioe.org...
I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case, I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold on
the bay.

AFAIK all the Mullard AC1xx transistors were in TO1 case, some germanium
(with AC prefix) from continental Europe had a smaller diameter, like a
*VERY* tall TO18 and hermetic flange.

The Motorola branded TO5 AC128s could very well be Kosher - its hard to see
counterfeiters faking a device in a case style it was never released in. The
AC126/127/128 were often found clamped to a heatsink - a different case
style would complicate things.

I don't like the logo used - it's too differently stylized to be
Motorola. An odd shortcoming in a counterfeit.

The Motorola circled M had filled peaks, not thin/thick strokes.
Motorola date codes were pretty unambiguous.

Also, I don't think Motorola ever bothered to compete in this product
line, or would have attempted to do so in this manner. 0nly 8 or so
house numbers in germanium TO1. No Pro-electron types. No Motorola
germanium in TO5 was ever rated above 200mW, no TO39 part ever rated
above 300mW.

Another germanium part - the AC141 - is reported as being marked by
Motorola in TO39 packages, but I've never seen one and regard this as
being the product of an amateur enthusiast's imagination.

Both AC128 and AC141 are Pro-Electron registered parts with defined
body styles. Their electrical ratings could be provided in TO5 or TO39
package sizes by other registered part types - there was no reason
ever to produce the variation shown.

RL

 

[Ian Field]

"legg" <legg@nospam.magma.ca> wrote in message
news:4rg1g8h7v20jppvo0tn3qld5t6shfbo72f@4ax.com...

On Mon, 21 Jan 2013 02:26:15 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"asdf" <asdf@nospam.com> wrote in message
news:kbs21j$gin$1@speranza.aioe.org...
I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case, I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold on
the bay.

AFAIK all the Mullard AC1xx transistors were in TO1 case, some germanium
(with AC prefix) from continental Europe had a smaller diameter, like a
*VERY* tall TO18 and hermetic flange.

The Motorola branded TO5 AC128s could very well be Kosher - its hard to
see
counterfeiters faking a device in a case style it was never released in.
The
AC126/127/128 were often found clamped to a heatsink - a different case
style would complicate things.

I don't like the logo used - it's too differently stylized to be
Motorola. An odd shortcoming in a counterfeit.

The Motorola circled M had filled peaks, not thin/thick strokes.
Motorola date codes were pretty unambiguous.

Also, I don't think Motorola ever bothered to compete in this product
line, or would have attempted to do so in this manner. 0nly 8 or so
house numbers in germanium TO1. No Pro-electron types. No Motorola
germanium in TO5 was ever rated above 200mW, no TO39 part ever rated
above 300mW.

Another germanium part - the AC141 - is reported as being marked by
Motorola in TO39 packages, but I've never seen one and regard this as
being the product of an amateur enthusiast's imagination.

Both AC128 and AC141 are Pro-Electron registered parts with defined
body styles. Their electrical ratings could be provided in TO5 or TO39
package sizes by other registered part types - there was no reason
ever to produce the variation shown.

There is one glaring anomaly I didn't spot - The listing says its NPN, the
AC126 & 128 were PNP - the AC127 was NPN.

 

[legg]

On Thu, 24 Jan 2013 15:01:17 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"legg" <legg@nospam.magma.ca> wrote in message
news:4rg1g8h7v20jppvo0tn3qld5t6shfbo72f@4ax.com...
On Mon, 21 Jan 2013 02:26:15 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"asdf" <asdf@nospam.com> wrote in message
news:kbs21j$gin$1@speranza.aioe.org...
I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case, I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold on
the bay.

AFAIK all the Mullard AC1xx transistors were in TO1 case, some germanium
(with AC prefix) from continental Europe had a smaller diameter, like a
*VERY* tall TO18 and hermetic flange.

The Motorola branded TO5 AC128s could very well be Kosher - its hard to
see
counterfeiters faking a device in a case style it was never released in.
The
AC126/127/128 were often found clamped to a heatsink - a different case
style would complicate things.

I don't like the logo used - it's too differently stylized to be
Motorola. An odd shortcoming in a counterfeit.

The Motorola circled M had filled peaks, not thin/thick strokes.
Motorola date codes were pretty unambiguous.

Also, I don't think Motorola ever bothered to compete in this product
line, or would have attempted to do so in this manner. 0nly 8 or so
house numbers in germanium TO1. No Pro-electron types. No Motorola
germanium in TO5 was ever rated above 200mW, no TO39 part ever rated
above 300mW.

Another germanium part - the AC141 - is reported as being marked by
Motorola in TO39 packages, but I've never seen one and regard this as
being the product of an amateur enthusiast's imagination.

Both AC128 and AC141 are Pro-Electron registered parts with defined
body styles. Their electrical ratings could be provided in TO5 or TO39
package sizes by other registered part types - there was no reason
ever to produce the variation shown.

There is one glaring anomaly I didn't spot - The listing says its NPN, the
AC126 & 128 were PNP - the AC127 was NPN.

- and there's no claim for a germanium material type or manufacturer
either - so it can't be a serious attempt at counterfeiting.

If the actual manufacturer and logo could be reconciled, I'd even be
willing to list it as a new part type.

I've requested more info from the vendor.

RL

 

[legg]

On Thu, 24 Jan 2013 16:52:49 -0500, legg <legg@nospam.magma.ca> wrote:

On Thu, 24 Jan 2013 15:01:17 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"legg" <legg@nospam.magma.ca> wrote in message
news:4rg1g8h7v20jppvo0tn3qld5t6shfbo72f@4ax.com...
On Mon, 21 Jan 2013 02:26:15 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"asdf" <asdf@nospam.com> wrote in message
news:kbs21j$gin$1@speranza.aioe.org...
I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case, I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold on
the bay.

AFAIK all the Mullard AC1xx transistors were in TO1 case, some germanium
(with AC prefix) from continental Europe had a smaller diameter, like a
*VERY* tall TO18 and hermetic flange.

The Motorola branded TO5 AC128s could very well be Kosher - its hard to
see
counterfeiters faking a device in a case style it was never released in.
The
AC126/127/128 were often found clamped to a heatsink - a different case
style would complicate things.

I don't like the logo used - it's too differently stylized to be
Motorola. An odd shortcoming in a counterfeit.

The Motorola circled M had filled peaks, not thin/thick strokes.
Motorola date codes were pretty unambiguous.

Also, I don't think Motorola ever bothered to compete in this product
line, or would have attempted to do so in this manner. 0nly 8 or so
house numbers in germanium TO1. No Pro-electron types. No Motorola
germanium in TO5 was ever rated above 200mW, no TO39 part ever rated
above 300mW.

Another germanium part - the AC141 - is reported as being marked by
Motorola in TO39 packages, but I've never seen one and regard this as
being the product of an amateur enthusiast's imagination.

Both AC128 and AC141 are Pro-Electron registered parts with defined
body styles. Their electrical ratings could be provided in TO5 or TO39
package sizes by other registered part types - there was no reason
ever to produce the variation shown.

There is one glaring anomaly I didn't spot - The listing says its NPN, the
AC126 & 128 were PNP - the AC127 was NPN.

- and there's no claim for a germanium material type or manufacturer
either - so it can't be a serious attempt at counterfeiting.

If the actual manufacturer and logo could be reconciled, I'd even be
willing to list it as a new part type.

I've requested more info from the vendor.

RL

The vendor has not acknowledged any communication.

RL

 

[Ian Field]

"legg" <legg@nospam.magma.ca> wrote in message
news:0bibh8dsp68c00j2rvmjciujikgc3uk5d1@4ax.com...

On Thu, 24 Jan 2013 16:52:49 -0500, legg <legg@nospam.magma.ca> wrote:

On Thu, 24 Jan 2013 15:01:17 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"legg" <legg@nospam.magma.ca> wrote in message
news:4rg1g8h7v20jppvo0tn3qld5t6shfbo72f@4ax.com...
On Mon, 21 Jan 2013 02:26:15 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"asdf" <asdf@nospam.com> wrote in message
news:kbs21j$gin$1@speranza.aioe.org...
I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case,
I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold
on
the bay.

AFAIK all the Mullard AC1xx transistors were in TO1 case, some
germanium
(with AC prefix) from continental Europe had a smaller diameter, like a
*VERY* tall TO18 and hermetic flange.

The Motorola branded TO5 AC128s could very well be Kosher - its hard to
see
counterfeiters faking a device in a case style it was never released
in.
The
AC126/127/128 were often found clamped to a heatsink - a different case
style would complicate things.

I don't like the logo used - it's too differently stylized to be
Motorola. An odd shortcoming in a counterfeit.

The Motorola circled M had filled peaks, not thin/thick strokes.
Motorola date codes were pretty unambiguous.

Also, I don't think Motorola ever bothered to compete in this product
line, or would have attempted to do so in this manner. 0nly 8 or so
house numbers in germanium TO1. No Pro-electron types. No Motorola
germanium in TO5 was ever rated above 200mW, no TO39 part ever rated
above 300mW.

Another germanium part - the AC141 - is reported as being marked by
Motorola in TO39 packages, but I've never seen one and regard this as
being the product of an amateur enthusiast's imagination.

Both AC128 and AC141 are Pro-Electron registered parts with defined
body styles. Their electrical ratings could be provided in TO5 or TO39
package sizes by other registered part types - there was no reason
ever to produce the variation shown.

There is one glaring anomaly I didn't spot - The listing says its NPN,
the
AC126 & 128 were PNP - the AC127 was NPN.

- and there's no claim for a germanium material type or manufacturer
either - so it can't be a serious attempt at counterfeiting.

If the actual manufacturer and logo could be reconciled, I'd even be
willing to list it as a new part type.

I've requested more info from the vendor.

RL

The vendor has not acknowledged any communication.

Surprise surprise!

 

[legg]

On Sat, 9 Feb 2013 14:53:06 -0000, "Ian Field"
<gangprobing.alien@ntlworld.com> wrote:

"legg" <legg@nospam.magma.ca> wrote in message
news:0bibh8dsp68c00j2rvmjciujikgc3uk5d1@4ax.com...
On Thu, 24 Jan 2013 16:52:49 -0500, legg <legg@nospam.magma.ca> wrote:

On Thu, 24 Jan 2013 15:01:17 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"legg" <legg@nospam.magma.ca> wrote in message
news:4rg1g8h7v20jppvo0tn3qld5t6shfbo72f@4ax.com...
On Mon, 21 Jan 2013 02:26:15 -0000, "Ian Field"
gangprobing.alien@ntlworld.com> wrote:



"asdf" <asdf@nospam.com> wrote in message
news:kbs21j$gin$1@speranza.aioe.org...
I stumbled upon this one.
http://www.ebay.it/itm/1pcs-AC128-AC128-NPN-Transistor-NEW-/360493462641

If memory doesn't fail AC128s were produced in a very different case,
I
never saw them in what appears a TO-5 one.
I don't need that transistor, just asking if anybody has seen them in
TO-5 case, otherwise it could be one of the many fake components sold
on
the bay.

AFAIK all the Mullard AC1xx transistors were in TO1 case, some
germanium
(with AC prefix) from continental Europe had a smaller diameter, like a
*VERY* tall TO18 and hermetic flange.

The Motorola branded TO5 AC128s could very well be Kosher - its hard to
see
counterfeiters faking a device in a case style it was never released
in.
The
AC126/127/128 were often found clamped to a heatsink - a different case
style would complicate things.

I don't like the logo used - it's too differently stylized to be
Motorola. An odd shortcoming in a counterfeit.

The Motorola circled M had filled peaks, not thin/thick strokes.
Motorola date codes were pretty unambiguous.

Also, I don't think Motorola ever bothered to compete in this product
line, or would have attempted to do so in this manner. 0nly 8 or so
house numbers in germanium TO1. No Pro-electron types. No Motorola
germanium in TO5 was ever rated above 200mW, no TO39 part ever rated
above 300mW.

Another germanium part - the AC141 - is reported as being marked by
Motorola in TO39 packages, but I've never seen one and regard this as
being the product of an amateur enthusiast's imagination.

Both AC128 and AC141 are Pro-Electron registered parts with defined
body styles. Their electrical ratings could be provided in TO5 or TO39
package sizes by other registered part types - there was no reason
ever to produce the variation shown.

There is one glaring anomaly I didn't spot - The listing says its NPN,
the
AC126 & 128 were PNP - the AC127 was NPN.

- and there's no claim for a germanium material type or manufacturer
either - so it can't be a serious attempt at counterfeiting.

If the actual manufacturer and logo could be reconciled, I'd even be
willing to list it as a new part type.

I've requested more info from the vendor.

RL

The vendor has not acknowledged any communication.

Surprise surprise!

Also a note saying the vendor could not be reached during the Chinese
New Year. This on an Italian language website......