STA5141 , TO5 transistor from 1974

N

N_Cook

Guest
In the pa of HH HA100 amp from 1974, probably ok but cannot find any info on
it, just maybe STA6141, a bit indistinct
 
N_Cook <diverse@tcp.co.uk> wrote in message
news:i38htv$pbu$1@news.eternal-september.org...
In the pa of HH HA100 amp from 1974, probably ok but cannot find any info
on
it, just maybe STA6141, a bit indistinct
Click to expand...
Logo on this and the other contemporaneous TO5 of 2N3440 and 2N5415 is
indistinct that at first sight looks like curvey M but is STT or SIT or STI
with shaded and sloping capital letters melded together
 
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:i38jil$uni$1@news.eternal-september.org...
N_Cook <diverse@tcp.co.uk> wrote in message
news:i38htv$pbu$1@news.eternal-september.org...
In the pa of HH HA100 amp from 1974, probably ok but cannot find any info
on
it, just maybe STA6141, a bit indistinct



Logo on this and the other contemporaneous TO5 of 2N3440 and 2N5415 is
indistinct that at first sight looks like curvey M but is STT or SIT or
STI
with shaded and sloping capital letters melded together
Click to expand...
Wasn't STT one of Thomson's before they became Thomson Microelectronics, or
some such ?

Arfa
 
Arfa Daily <arfa.daily@ntlworld.com> wrote in message
news:Jw26o.18757$MQ3.15750@hurricane...
"N_Cook" <diverse@tcp.co.uk> wrote in message
news:i38jil$uni$1@news.eternal-september.org...
N_Cook <diverse@tcp.co.uk> wrote in message
news:i38htv$pbu$1@news.eternal-september.org...
In the pa of HH HA100 amp from 1974, probably ok but cannot find any
info
on
it, just maybe STA6141, a bit indistinct



Logo on this and the other contemporaneous TO5 of 2N3440 and 2N5415 is
indistinct that at first sight looks like curvey M but is STT or SIT or
STI
with shaded and sloping capital letters melded together



Wasn't STT one of Thomson's before they became Thomson Microelectronics,
or
some such ?

Arfa
Click to expand...
I cannot be sure it is STT logo, I would not say it was STC , no C at the
end. There was an STC STA9... range. Anyway for anyone meeting one in
earnest it is TO3, NPN, "D" pinning EBC and probably 300V rating like the
others in that area
 
N_Cook wrote:
In the pa of HH HA100 amp from 1974, probably ok but cannot find any info on
it, just maybe STA6141, a bit indistinct
Click to expand...
Perhaps a hi-resolution picture uploaded somewhere of the transistor?

I see nothing in my 1979 D.A.T.A (Edition 46) Book for anything like
ST*5141.

Also who is HH?

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
 
John Robertson <spam@flippers.com> wrote in message
news:n6j6o.10624$z%6.92@edtnps83...
N_Cook wrote:
In the pa of HH HA100 amp from 1974, probably ok but cannot find any
info on
it, just maybe STA6141, a bit indistinct



Perhaps a hi-resolution picture uploaded somewhere of the transistor?

I see nothing in my 1979 D.A.T.A (Edition 46) Book for anything like
ST*5141.

Also who is HH?

John :-#)#

--
(Please post followups or tech inquiries to the newsgroup)
John's Jukes Ltd. 2343 Main St., Vancouver, BC, Canada V5T 3C9
Call (604)872-5757 or Fax 872-2010 (Pinballs, Jukes, Video Games)
www.flippers.com
"Old pinballers never die, they just flip out."
Click to expand...

I will try photos of the logo later today
HH , logo H||H on my screen H 2 vertical bars H
http://www.hhamplification.co.uk/history.asp
I think H&H is a different company
 
I decided to remove the cover on the output pair and the same shaded logo
there reads definitely STC, so presumably before the rasterfied form of
their logo. TO3 devices marked 9029 and date code also 7429

That 'dropped' piece of white in the TO5 logo stamps , at the end
(beware intrusive Java on this hosting site)
http://diverse.4mg.com/STA5141_logo.jpg
is consistent on all of the TO5 so perhaps a broken stamp
The STA 5141marked device is in an awkward position to photo.

Remnant of H&H I think is printed on the front Al girder, so not a different
company. When was the last time anyone saw a fully working ZnS
electrophosphorescent panel on these (not HA100) MA100 amps?
Is the oily feel but not oily smelling coating over the boards inside ,
broken down conformal coating, or owner squirting Snibbo (Spike Milligan TM)
everywhere
 
Was it US STC = Silicon Transistor Corporation
or UK STC Standard Telephones and Cables
interesting info
http://homepages.nildram.co.uk/~wylie/STC/STC.htm
different logo again
 
On Thu, 5 Aug 2010 10:21:08 +0100, "N_Cook" <diverse@tcp.co.uk> wrote:

:I decided to remove the cover on the output pair and the same shaded logo
:there reads definitely STC, so presumably before the rasterfied form of
:their logo. TO3 devices marked 9029 and date code also 7429
:
:That 'dropped' piece of white in the TO5 logo stamps , at the end
:(beware intrusive Java on this hosting site)
:http://diverse.4mg.com/STA5141_logo.jpg
:is consistent on all of the TO5 so perhaps a broken stamp
:The STA 5141marked device is in an awkward position to photo.
:
:Remnant of H&H I think is printed on the front Al girder, so not a different
:company. When was the last time anyone saw a fully working ZnS
:electrophosphorescent panel on these (not HA100) MA100 amps?
:Is the oily feel but not oily smelling coating over the boards inside ,
:broken down conformal coating, or owner squirting Snibbo (Spike Milligan TM)
:everywhere
:

This looks to me like STC - but not the ITT company. It is Silicon Transistor
Corporation http://freespace.virgin.net/matt.waite/resource/logos/logo4.htm

Page from short form catalog
http://www.datasheetarchive.com/pdf/getfile.php?dir=Databooks-1&file=17-8.pdf&scan=
 
I picked up my 1976 D.A.T.A transistor book , back face up and it has on the
back, a full page ad for Silicon Transistor Corporation devices, with that
logo (undisplaced C-top) but no reference to those sorts of numbers on that
page or inside pages. Maybe export versions
 
On Thu, 05 Aug 2010 17:59:08 +0800, Ross Herbert <rherber1@bigpond.net.au>
wrote:
:
:This looks to me like STC - but not the ITT company. It is Silicon Transistor
:Corporation http://freespace.virgin.net/matt.waite/resource/logos/logo4.htm
:
:page from short form catalog
:http://www.datasheetarchive.com/pdf/getfile.php?dir=Databooks-1&file=17-8.pdf&scan=


STC was acquired by New England Semiconductor and then by Microsemi
http://www.sherlab.com/index.htm?/electronics/ss.html
 
You must log in or register to reply here.

Welcome to EDABoard.com

Sponsor

Back
Top