[TechAssist] Re: Home made variable DC Power Supply
- From: Gary McCartney <gary@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 02 Aug 2003 02:34:02 -0400
Thats interesting. I have an old semiconductor cross ref. book from the
70's and it lists a lot of Elcom parts but it skips from IC320 to
IC322. This IC321 number on the chip wouldn't be a house number would
it? I mean a number that a kit manufacturer stamped on the IC
themselves, as in location IC321 on the circuit board. Some companies do
this so you can't easily copy their kits with off the shelf parts.
Gary McCartney
McCartney Electronics
7134 Fife Rd, RR 7
Guelph Ontario Canada N1H 6J4
Fax: (519)821-1530
email: gary (at) number63.ca
Al Gutz wrote:
>
> IC 321 sounds like a number used by Elcom who were a company like ECG
> with a replacement line. If you can find an old ECG catalog you can
> likely cross it back to an ECG number. Oldest I have is catalog 212Q and
> it lists IC320 and skips to IC322
>
> Al G
> Al's TV-Electronics
> Pembroke Ont.
> Canada
>
> "Warren C." wrote:
> >
> > Jerry and All
> > Thanks for your replies thus far. The only number written on the IC is
> > .....IC321 that's it.
> > You'd think that would be a location number but no IC321 is the actual
> > number.
> > Anyone have a source for ESR testers in Canada?
> >
> > J Silverman wrote:
> >
> > > Are there any numbers on the top or side of the IC?
> > > Jerry Silverman
> > > Greentron Inc
> > > 4 Newland Ave
> > > Greenville SC 29609
> > > 864 232 3889
> > > Fax 271 2080
> > > mailto:greentron@xxxxxxx
> > > ----- Original Message -----
> > > From: "Warren C." <warrenca@xxxxxxxxx>
> > > To: "techassist" <techassist@xxxxxxxxxxxxx>
> > > Sent: Friday, August 01, 2003 12:52 AM
> > > Subject: [TechAssist] Home made variable DC Power Supply
> > >
> > > > Hi All
> > > >
> > > > My old DC PS finally Quit regulating, problem is it was built so many
> > > > years ago
> > > > that I no longer have the schem.
> > > > It controls the Voltage output from 35 V down to about 1.5V
> > > > The current can be adjusted from 2A down to about 5ma.
> > > >
> > > > I've found some bad caps and replaced them but it still does not
> > > > regulate down below
> > > > 10 V and it used to.
> > > > The main problem (I think) is the reg. IC# is IC321 and I can't find it
> > > > or cross it.
> > > > It is a 5/16" can type with 8 legs on it. The IC controls a large heat
> > > > sinked T O 3 trans.
> > > >
> > > > Does anyone have info on this IC??
> > > > I would welcome your schematics for similar home made PS's
> > > >
> > > > Secondly where in Canada can I buy a ESR cap tester. No insult but I
> > > > had a bad experience
> > > > years ago with an electronics company in the States. I sent down a mail
> > > > order for about $350.00
> > > > It was cashed but never received any thing for it and no replies
> > > > afterwards..!
> > > >
> > > > TIA
> > > >
> > > > Warren Campbell
> > > > Campbell's TV & Appliances
> > > > Cannington On
> > > > Canada
> > > >
> > > >
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