Perhaps a caveat is needed here, and that is, if you have
old as-new stocks of wire-ended components, (with the possible
exception of electrolytics), then hang onto them like gold dust!

Also, if you're moving in the direction of SMD, then
the easily-installed 1206 former larger sizes are
something to get hold of while you can.

My regret is that a couple of years ago in a clear-out,
I binned all my "geranium" semiconductors and RTL logic chips.

(Not sure, however, if that applies to the 12AT7 up in
the box in the loft, although if I remember correctly,
the filament connections were on pins 4, 5 & 9, giving
you the choice of either 6V3 or 12V heaters)

/WAFFLE :-)

On 28/01/2020 11:48, Gareth Evans wrote:
Perhaps a caveat is needed here, and that is, if you have
old as-new stocks of wire-ended components, (with the possible
exception of electrolytics), then hang onto them like gold dust!

Also, if you're moving in the direction of SMD, then
the easily-installed 1206 former larger sizes are
something to get hold of while you can.

My regret is that a couple of years ago in a clear-out,
I binned all my "geranium" semiconductors and RTL logic chips.

(Not sure, however, if that applies to the 12AT7 up in
the box in the loft, although if I remember correctly,
the filament connections were on pins 4, 5 & 9, giving
you the choice of either 6V3 or 12V heaters)

/WAFFLEÂ* :-)



RTL? Bloody hell, I was already building stuff in DTL in 1968.

You mean germanium, probably. Are you saying they don't make wire ended bits
any more, somebody does cos I've seen them in some of the wall warts
recently purchased, usually silicon transistors, small but higher wattage
resistors etc.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Gareth Evans" wrote in message
...
Perhaps a caveat is needed here, and that is, if you have
old as-new stocks of wire-ended components, (with the possible
exception of electrolytics), then hang onto them like gold dust!

Also, if you're moving in the direction of SMD, then
the easily-installed 1206 former larger sizes are
something to get hold of while you can.

My regret is that a couple of years ago in a clear-out,
I binned all my "geranium" semiconductors and RTL logic chips.

(Not sure, however, if that applies to the 12AT7 up in
the box in the loft, although if I remember correctly,
the filament connections were on pins 4, 5 & 9, giving
you the choice of either 6V3 or 12V heaters)

/WAFFLE :-)

Yes way back when I had sight I built a heathkit short wave radio and it
used dual gate mosfets.
Good fun lining it up.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"newshound" wrote in message
o.uk...
On 28/01/2020 11:48, Gareth Evans wrote:
Perhaps a caveat is needed here, and that is, if you have
old as-new stocks of wire-ended components, (with the possible
exception of electrolytics), then hang onto them like gold dust!

Also, if you're moving in the direction of SMD, then
the easily-installed 1206 former larger sizes are
something to get hold of while you can.

My regret is that a couple of years ago in a clear-out,
I binned all my "geranium" semiconductors and RTL logic chips.

(Not sure, however, if that applies to the 12AT7 up in
the box in the loft, although if I remember correctly,
the filament connections were on pins 4, 5 & 9, giving
you the choice of either 6V3 or 12V heaters)

/WAFFLE :-)



RTL? Bloody hell, I was already building stuff in DTL in 1968.

Yes unfortunately the likes of tandy and maplin put the little guys out of
business and now they have both gone off the high street and rates are high,
the little guys are unlikely to return.
Brian

--
----- --
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...

Blind user, so no pictures please
Note this Signature is meaningless.!
"Dave Plowman (News)" wrote in message
...
In article ,
Gareth Evans wrote:
Perhaps a caveat is needed here, and that is, if you have
old as-new stocks of wire-ended components, (with the possible
exception of electrolytics), then hang onto them like gold dust!

Also, if you're moving in the direction of SMD, then
the easily-installed 1206 former larger sizes are
something to get hold of while you can.

My regret is that a couple of years ago in a clear-out,
I binned all my "geranium" semiconductors and RTL logic chips.

I've not had a problem sourcing any discrete components as yet. Via mail
order. The days of having several shops round here that sold them long
gone, though.

--
*Sorry, I don't date outside my species.

Dave Plowman London SW
To e-mail, change noise into sound.

On Tuesday, 28 January 2020 15:01:40 UTC, Dave Plowman (News) wrote:
In article ,
Gareth Evans wrote:
Perhaps a caveat is needed here, and that is, if you have
old as-new stocks of wire-ended components, (with the possible
exception of electrolytics), then hang onto them like gold dust!

Also, if you're moving in the direction of SMD, then
the easily-installed 1206 former larger sizes are
something to get hold of while you can.

My regret is that a couple of years ago in a clear-out,
I binned all my "geranium" semiconductors and RTL logic chips.

I've not had a problem sourcing any discrete components as yet. Via mail
order. The days of having several shops round here that sold them long
gone, though.

Some things are more difficult to get and come at a price watch out.

74LS76

https://www.cricklewoodelectronics.c...CYg YQAvD_BwE

£6.60

https://www.amazon.co.uk/HD74LS76AP-...0304105&sr=8-2

~£4 for five but £7 P&P

We had to scap these from a lab because we couldn't get them reasonably priced
and that was over 5 years ago.

They used be be 25p or so.

On 29/01/2020 13:24, whisky-dave wrote:
Some things are more difficult to get and come at a price watch out.
74LS76
https://www.cricklewoodelectronics.c...CYg YQAvD_BwE
£6.60
https://www.amazon.co.uk/HD74LS76AP-...0304105&sr=8-2
~£4 for five but £7 P&P


perhaps my stocks of original TTL from 1973 might be worth something
(First computer attempt, own instruction set, 8bit)

We had to scap these from a lab because we couldn't get them reasonably priced
and that was over 5 years ago.

They used be be 25p or so.

I wonder at which institution you are a lecturer? (My alma
mater was Essex '69 - '72)

On Wednesday, 29 January 2020 15:41:58 UTC, Gareth Evans wrote:
On 29/01/2020 13:24, whisky-dave wrote:
Some things are more difficult to get and come at a price watch out.
74LS76
https://www.cricklewoodelectronics.c...CYg YQAvD_BwE
£6.60
https://www.amazon.co.uk/HD74LS76AP-...0304105&sr=8-2
~£4 for five but £7 P&P


perhaps my stocks of original TTL from 1973 might be worth something
(First computer attempt, own instruction set, 8bit)

Yes check the BBC website there might be an antigues roadshow near you soon..



We had to scap these from a lab because we couldn't get them reasonably priced
and that was over 5 years ago.

They used be be 25p or so.

I wonder at which institution you are a lecturer? (My alma
mater was Essex '69 - '72)

I've never been a lecturer.

On Wednesday, 29 January 2020 16:49:35 UTC, Rambo wrote:
On Wed, 29 Jan 2020 05:24:20 -0800 (PST), whisky-dave
wrote:

On Tuesday, 28 January 2020 15:01:40 UTC, Dave Plowman (News) wrote:
In article ,
Gareth Evans wrote:
Perhaps a caveat is needed here, and that is, if you have
old as-new stocks of wire-ended components, (with the possible
exception of electrolytics), then hang onto them like gold dust!

Also, if you're moving in the direction of SMD, then
the easily-installed 1206 former larger sizes are
something to get hold of while you can.

My regret is that a couple of years ago in a clear-out,
I binned all my "geranium" semiconductors and RTL logic chips.

I've not had a problem sourcing any discrete components as yet. Via mail
order. The days of having several shops round here that sold them long
gone, though.

Some things are more difficult to get and come at a price watch out.

74LS76

https://www.cricklewoodelectronics.c...CYg YQAvD_BwE

£6.60

https://www.amazon.co.uk/HD74LS76AP-...0304105&sr=8-2

~£4 for five but £7 P&P

We had to scap these from a lab because we couldn't get them reasonably priced
and that was over 5 years ago.

They used be be 25p or so.


Russia is a happy hunting ground. The Old Soviet semiconductors are
usually straight copes of western components and work just as well.
And they are usually a few pence.

https://ganswijk.home.xs4all.nl/chip...viet/index.htm

I wouldn't send my CC details to a russian company.

But if anyone can provoide a link to some reasonably priced 74LS76
then I'd be interested, we'd need about 100 to start with.

But personally I;d prefer we teach our students how to use cpmponents that
are currently easy to get a a little more modern.
I;m pushing to go exclusively to the HC series.
Not interested in the 7400, or 74LS, or 74S or 74F or 74ALS.

Some chips/components are getting difficult to get as 'through hole"