[TechAssist] Re: Home made variable DC Power Supply
- From: "Warren C." <warrenca@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 02 Aug 2003 08:39:36 -0400
Gary
The parts in the circuit were all parts from tv's etc. and I've etched the
circuit
board myself, so I don't think
that the number was written on the side in black ink because of a kit. Nice
thought
though I thought of this
myself. It's in an akward spot so I'll use a bright light and a mirror today
Gary. The
Elcom theory is an
interesting one---my father when he was alive used elcom, years ago!
BTW this PS has a switch on the front which changes the meter from a Volt M to a
Current M very handy.
I would like your schematics for your PS incase I need to turn to them someday
Thanks
Gary
WC
Gary McCartney wrote:
> 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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