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Jan Panteltje
Guest
On a sunny day (Sun, 2 Jan 2022 18:27:08 -0000 (UTC)) it happened Cursitor
Doom <cd@notformail.com> wrote in <sqsqps$vv9$1@dont-email.me>:
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
As to transistors, just buy some BC107 BC109 and play with those.
Never mind the f*cking math, these are current amplifiers. with high Zout
high beta NPNs
Doom <cd@notformail.com> wrote in <sqsqps$vv9$1@dont-email.me>:
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
As to transistors, just buy some BC107 BC109 and play with those.
Never mind the f*cking math, these are current amplifiers. with high Zout
high beta NPNs
C
C Doom
Guest
On Sun, 02 Jan 2022 19:18:57 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
<pNaonStpealmtje@yahoo.com> wrote:
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
J
Jan Panteltje
Guest
On a sunny day (Mon, 03 Jan 2022 15:31:21 +0000) it happened C Doom
<cd@notformail.com> wrote in <7g56tgpn84jk9em9eerjdan4deorlrcd1v@4ax.com>:
The 10V minimum is actually 8V depending how you read the datasheets:
https://www.ti.com/lit/an/snaa086/snaa086.pdf
at 8V your battery is likely empty?
<cd@notformail.com> wrote in <7g56tgpn84jk9em9eerjdan4deorlrcd1v@4ax.com>:
On Sun, 02 Jan 2022 19:18:57 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Sun, 2 Jan 2022 18:27:08 -0000 (UTC)) it happened Cursitor
Doom <cd@notformail.com> wrote in <sqsqps$vv9$1@dont-email.me>:
Gentlemen,
I have a fairly substantial Hacker Helmsman transistor radio made in 1970
and its audio board has failed. Repair does not seem practicable so I\'m
now going to replace the faulty board with an IC I\'ve found in my
inventory. I\'m just wondering if it will be suitable, though. In
particular I\'m concerned about the line in the datasheet that says it\'s
especially suitable for mains-powered applications. That seems to imply
it\'s a current hog and will drain batteries in short order. This radio
runs off batteries, although admittedly quite heafty ones: 8x 1.5V \'D\'
cells for 12V in total.
Here\'s the chip:
https://pdf1.alldatasheetru.com/datasheet-pdf/view/19258/PHILIPS/
TDA2611A.html
I\'m sure there are better-suited ones out there, but I\'d far sooner use
one \'from stock\' unless there\'s a compelling reason not to.
Observations from contributors north of the Tropic of Capricorn only,
please. Thanks!
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
The 10V minimum is actually 8V depending how you read the datasheets:
https://www.ti.com/lit/an/snaa086/snaa086.pdf
at 8V your battery is likely empty?
C
Cursitor Doom
Guest
On Mon, 03 Jan 2022 16:10:24 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:
This is odd. The datasheet I found clearly says 10V min!
https://www.ti.com/lit/ds/symlink/lm380.pdf
I\'d sooner have a bit more headroom to be on the safe side.
<pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Mon, 03 Jan 2022 15:31:21 +0000) it happened C Doom
cd@notformail.com> wrote in <7g56tgpn84jk9em9eerjdan4deorlrcd1v@4ax.com>:
On Sun, 02 Jan 2022 19:18:57 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Sun, 2 Jan 2022 18:27:08 -0000 (UTC)) it happened Cursitor
Doom <cd@notformail.com> wrote in <sqsqps$vv9$1@dont-email.me>:
Gentlemen,
I have a fairly substantial Hacker Helmsman transistor radio made in 1970
and its audio board has failed. Repair does not seem practicable so I\'m
now going to replace the faulty board with an IC I\'ve found in my
inventory. I\'m just wondering if it will be suitable, though. In
particular I\'m concerned about the line in the datasheet that says it\'s
especially suitable for mains-powered applications. That seems to imply
it\'s a current hog and will drain batteries in short order. This radio
runs off batteries, although admittedly quite heafty ones: 8x 1.5V \'D\'
cells for 12V in total.
Here\'s the chip:
https://pdf1.alldatasheetru.com/datasheet-pdf/view/19258/PHILIPS/
TDA2611A.html
I\'m sure there are better-suited ones out there, but I\'d far sooner use
one \'from stock\' unless there\'s a compelling reason not to.
Observations from contributors north of the Tropic of Capricorn only,
please. Thanks!
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
The 10V minimum is actually 8V depending how you read the datasheets:
https://www.ti.com/lit/an/snaa086/snaa086.pdf
at 8V your battery is likely empty?
This is odd. The datasheet I found clearly says 10V min!
https://www.ti.com/lit/ds/symlink/lm380.pdf
I\'d sooner have a bit more headroom to be on the safe side.
A
Anthony William Sloman
Guest
On Tuesday, January 4, 2022 at 6:13:31 AM UTC+11, Cursitor Doom wrote:
But figure 10 - at the bottom of page 5 - shows power consumption down to 8V. Taking the supply voltage that low will cut into the output swing, but the circuit diagram - figure 5 on page 2 - makes it clear that the circuit won\'t suddenly stop working if the supply voltage gets down to 8V or a bit below
> I\'d sooner have a bit more headroom to be on the safe side.
But you are an ignorant twit.
--
Bill Sloman, Sydney
On Mon, 03 Jan 2022 16:10:24 GMT, Jan Panteltje
pNaonSt...@yahoo.com> wrote:
On a sunny day (Mon, 03 Jan 2022 15:31:21 +0000) it happened C Doom
c...@notformail.com> wrote in <7g56tgpn84jk9em9e...@4ax.com>:
On Sun, 02 Jan 2022 19:18:57 GMT, Jan Panteltje
pNaonSt...@yahoo.com> wrote:
On a sunny day (Sun, 2 Jan 2022 18:27:08 -0000 (UTC)) it happened Cursitor
Doom <c...@notformail.com> wrote in <sqsqps$vv9$1...@dont-email.me>:
Gentlemen,
I have a fairly substantial Hacker Helmsman transistor radio made in 1970
and its audio board has failed. Repair does not seem practicable so I\'m
now going to replace the faulty board with an IC I\'ve found in my
inventory. I\'m just wondering if it will be suitable, though. In
particular I\'m concerned about the line in the datasheet that says it\'s
especially suitable for mains-powered applications. That seems to imply
it\'s a current hog and will drain batteries in short order. This radio
runs off batteries, although admittedly quite heafty ones: 8x 1.5V \'D\'
cells for 12V in total.
Here\'s the chip:
https://pdf1.alldatasheetru.com/datasheet-pdf/view/19258/PHILIPS/
TDA2611A.html
I\'m sure there are better-suited ones out there, but I\'d far sooner use
one \'from stock\' unless there\'s a compelling reason not to.
Observations from contributors north of the Tropic of Capricorn only,
please. Thanks!
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
The 10V minimum is actually 8V depending how you read the datasheets:
https://www.ti.com/lit/an/snaa086/snaa086.pdf
at 8V your battery is likely empty?
This is odd. The datasheet I found clearly says 10V min!
https://www.ti.com/lit/ds/symlink/lm380.pdf
But figure 10 - at the bottom of page 5 - shows power consumption down to 8V. Taking the supply voltage that low will cut into the output swing, but the circuit diagram - figure 5 on page 2 - makes it clear that the circuit won\'t suddenly stop working if the supply voltage gets down to 8V or a bit below
> I\'d sooner have a bit more headroom to be on the safe side.
But you are an ignorant twit.
--
Bill Sloman, Sydney
J
Jan Panteltje
Guest
On a sunny day (Mon, 03 Jan 2022 19:13:24 +0000) it happened Cursitor Doom
<cd@notformail.com> wrote in <vji6tg52s4ibs1gm18oupqgven5vjscrr7@4ax.com>:
Sure, if you look at the current drain versus voltage graph it still is working down to 8V
You will have more limited output of course.
I have a LM380 somewhere, could try IF I can find it.
Used that chip several times in the past, beware it is class AB, so it will pull down your battery on high output
so I think there is your limiting factor.
But it was just a suggestion...
There maybe be more suitable ones, but that chip has proven itself here.
You can do it discrete too, just a few transistors, been there done that
long before LM380.
https://www.ebay.com/itm/321190482320
5pcs for 7$50
<cd@notformail.com> wrote in <vji6tg52s4ibs1gm18oupqgven5vjscrr7@4ax.com>:
On Mon, 03 Jan 2022 16:10:24 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Mon, 03 Jan 2022 15:31:21 +0000) it happened C Doom
cd@notformail.com> wrote in <7g56tgpn84jk9em9eerjdan4deorlrcd1v@4ax.com>:
On Sun, 02 Jan 2022 19:18:57 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Sun, 2 Jan 2022 18:27:08 -0000 (UTC)) it happened Cursitor
Doom <cd@notformail.com> wrote in <sqsqps$vv9$1@dont-email.me>:
Gentlemen,
I have a fairly substantial Hacker Helmsman transistor radio made in 1970
and its audio board has failed. Repair does not seem practicable so I\'m
now going to replace the faulty board with an IC I\'ve found in my
inventory. I\'m just wondering if it will be suitable, though. In
particular I\'m concerned about the line in the datasheet that says it\'s
especially suitable for mains-powered applications. That seems to imply
it\'s a current hog and will drain batteries in short order. This radio
runs off batteries, although admittedly quite heafty ones: 8x 1.5V \'D\'
cells for 12V in total.
Here\'s the chip:
https://pdf1.alldatasheetru.com/datasheet-pdf/view/19258/PHILIPS/
TDA2611A.html
I\'m sure there are better-suited ones out there, but I\'d far sooner use
one \'from stock\' unless there\'s a compelling reason not to.
Observations from contributors north of the Tropic of Capricorn only,
please. Thanks!
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
The 10V minimum is actually 8V depending how you read the datasheets:
https://www.ti.com/lit/an/snaa086/snaa086.pdf
at 8V your battery is likely empty?
This is odd. The datasheet I found clearly says 10V min!
https://www.ti.com/lit/ds/symlink/lm380.pdf
I\'d sooner have a bit more headroom to be on the safe side.
Sure, if you look at the current drain versus voltage graph it still is working down to 8V
You will have more limited output of course.
I have a LM380 somewhere, could try IF I can find it.
Used that chip several times in the past, beware it is class AB, so it will pull down your battery on high output
so I think there is your limiting factor.
But it was just a suggestion...
There maybe be more suitable ones, but that chip has proven itself here.
You can do it discrete too, just a few transistors, been there done that
long before LM380.
https://www.ebay.com/itm/321190482320
5pcs for 7$50
C
Cursitor Doom
Guest
On Tue, 04 Jan 2022 06:25:17 GMT, Jan Panteltje
<pNaonStpealmtje@yahoo.com> wrote:
I\'m sure I have one (at least here already). The problem is locating
it out of the thousands of siimilar looking ICs. I usually just give
up after a few hours and order one. Then a couple of months later I\'ll
find I did already have one - or a dozen. I can\'t win. :-/
<pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Mon, 03 Jan 2022 19:13:24 +0000) it happened Cursitor Doom
cd@notformail.com> wrote in <vji6tg52s4ibs1gm18oupqgven5vjscrr7@4ax.com>:
On Mon, 03 Jan 2022 16:10:24 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Mon, 03 Jan 2022 15:31:21 +0000) it happened C Doom
cd@notformail.com> wrote in <7g56tgpn84jk9em9eerjdan4deorlrcd1v@4ax.com>:
On Sun, 02 Jan 2022 19:18:57 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Sun, 2 Jan 2022 18:27:08 -0000 (UTC)) it happened Cursitor
Doom <cd@notformail.com> wrote in <sqsqps$vv9$1@dont-email.me>:
Gentlemen,
I have a fairly substantial Hacker Helmsman transistor radio made in 1970
and its audio board has failed. Repair does not seem practicable so I\'m
now going to replace the faulty board with an IC I\'ve found in my
inventory. I\'m just wondering if it will be suitable, though. In
particular I\'m concerned about the line in the datasheet that says it\'s
especially suitable for mains-powered applications. That seems to imply
it\'s a current hog and will drain batteries in short order. This radio
runs off batteries, although admittedly quite heafty ones: 8x 1.5V \'D\'
cells for 12V in total.
Here\'s the chip:
https://pdf1.alldatasheetru.com/datasheet-pdf/view/19258/PHILIPS/
TDA2611A.html
I\'m sure there are better-suited ones out there, but I\'d far sooner use
one \'from stock\' unless there\'s a compelling reason not to.
Observations from contributors north of the Tropic of Capricorn only,
please. Thanks!
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
The 10V minimum is actually 8V depending how you read the datasheets:
https://www.ti.com/lit/an/snaa086/snaa086.pdf
at 8V your battery is likely empty?
This is odd. The datasheet I found clearly says 10V min!
https://www.ti.com/lit/ds/symlink/lm380.pdf
I\'d sooner have a bit more headroom to be on the safe side.
Sure, if you look at the current drain versus voltage graph it still is working down to 8V
You will have more limited output of course.
I have a LM380 somewhere, could try IF I can find it.
Used that chip several times in the past, beware it is class AB, so it will pull down your battery on high output
so I think there is your limiting factor.
But it was just a suggestion...
There maybe be more suitable ones, but that chip has proven itself here.
You can do it discrete too, just a few transistors, been there done that
long before LM380.
https://www.ebay.com/itm/321190482320
5pcs for 7$50
I\'m sure I have one (at least here already). The problem is locating
it out of the thousands of siimilar looking ICs. I usually just give
up after a few hours and order one. Then a couple of months later I\'ll
find I did already have one - or a dozen. I can\'t win. :-/
E
Edward Hernandez
Guest
The John Doe troll stated the following in message-id
<sdhn7c$pkp$4@dont-email.me>:
> The troll doesn\'t even know how to format a USENET post...
And the John Doe troll stated the following in message-id
<sg3kr7$qt5$1@dont-email.me>:
And yet, the clueless John Doe troll has itself posted yet another
incorrectly formatted USENET posting on Wed, 5 Jan 2022 02:04:39 -0000
(UTC) in message-id <sr2ubn$jeh$1@dont-email.me>.
uZKbPoJioTy4
<sdhn7c$pkp$4@dont-email.me>:
> The troll doesn\'t even know how to format a USENET post...
And the John Doe troll stated the following in message-id
<sg3kr7$qt5$1@dont-email.me>:
And yet, the clueless John Doe troll has itself posted yet another
incorrectly formatted USENET posting on Wed, 5 Jan 2022 02:04:39 -0000
(UTC) in message-id <sr2ubn$jeh$1@dont-email.me>.
uZKbPoJioTy4
J
Jan Panteltje
Guest
On a sunny day (Tue, 04 Jan 2022 22:20:55 +0000) it happened Cursitor Doom
<cd@notformail.com> wrote in <2th9tghr4t4ug6bbiht3tjb87rk8laefhg@4ax.com>:
Yes, same problem here, after I moved house things are in some of the 40 big boxes many full of electronics.
I have some sorted out now.
I took pictures of the contents with my smartphone, that does help and prevenst a lot of heavy lifting...
<cd@notformail.com> wrote in <2th9tghr4t4ug6bbiht3tjb87rk8laefhg@4ax.com>:
On Tue, 04 Jan 2022 06:25:17 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Mon, 03 Jan 2022 19:13:24 +0000) it happened Cursitor Doom
cd@notformail.com> wrote in <vji6tg52s4ibs1gm18oupqgven5vjscrr7@4ax.com>:
On Mon, 03 Jan 2022 16:10:24 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Mon, 03 Jan 2022 15:31:21 +0000) it happened C Doom
cd@notformail.com> wrote in <7g56tgpn84jk9em9eerjdan4deorlrcd1v@4ax.com>:
On Sun, 02 Jan 2022 19:18:57 GMT, Jan Panteltje
pNaonStpealmtje@yahoo.com> wrote:
On a sunny day (Sun, 2 Jan 2022 18:27:08 -0000 (UTC)) it happened Cursitor
Doom <cd@notformail.com> wrote in <sqsqps$vv9$1@dont-email.me>:
Gentlemen,
I have a fairly substantial Hacker Helmsman transistor radio made in 1970
and its audio board has failed. Repair does not seem practicable so I\'m
now going to replace the faulty board with an IC I\'ve found in my
inventory. I\'m just wondering if it will be suitable, though. In
particular I\'m concerned about the line in the datasheet that says it\'s
especially suitable for mains-powered applications. That seems to imply
it\'s a current hog and will drain batteries in short order. This radio
runs off batteries, although admittedly quite heafty ones: 8x 1.5V \'D\'
cells for 12V in total.
Here\'s the chip:
https://pdf1.alldatasheetru.com/datasheet-pdf/view/19258/PHILIPS/
TDA2611A.html
I\'m sure there are better-suited ones out there, but I\'d far sooner use
one \'from stock\' unless there\'s a compelling reason not to.
Observations from contributors north of the Tropic of Capricorn only,
please. Thanks!
LM380 2.5W 10-22V
LM386 about 1W 4-12V
Both are single supply and classics.
The problem with the 380 is the 10V min. The battery pack is 12V so
when that starts to sag.... Really not enough headroom. Shame, as the
Iq is very low; about a quarter of the draw that the chip I found is
quoted at. The 386 wouldn\'t have enough grunt, I\'m afraid.
The 10V minimum is actually 8V depending how you read the datasheets:
https://www.ti.com/lit/an/snaa086/snaa086.pdf
at 8V your battery is likely empty?
This is odd. The datasheet I found clearly says 10V min!
https://www.ti.com/lit/ds/symlink/lm380.pdf
I\'d sooner have a bit more headroom to be on the safe side.
Sure, if you look at the current drain versus voltage graph it still is working down to 8V
You will have more limited output of course.
I have a LM380 somewhere, could try IF I can find it.
Used that chip several times in the past, beware it is class AB, so it will pull down your battery on high output
so I think there is your limiting factor.
But it was just a suggestion...
There maybe be more suitable ones, but that chip has proven itself here.
You can do it discrete too, just a few transistors, been there done that
long before LM380.
https://www.ebay.com/itm/321190482320
5pcs for 7$50
I\'m sure I have one (at least here already). The problem is locating
it out of the thousands of siimilar looking ICs. I usually just give
up after a few hours and order one. Then a couple of months later I\'ll
find I did already have one - or a dozen. I can\'t win. :-/
Yes, same problem here, after I moved house things are in some of the 40 big boxes many full of electronics.
I have some sorted out now.
I took pictures of the contents with my smartphone, that does help and prevenst a lot of heavy lifting...
T
Tabby
Guest
On Sunday, 2 January 2022 at 18:27:16 UTC, Cursitor Doom wrote:
If you don\'t find your 380 you could always use an opamp and a class B germanium output pair. Done that before. Just be careful about temperatures with geraniums. Ge is much more forgiving in class B than silicon.
If you don\'t find your 380 you could always use an opamp and a class B germanium output pair. Done that before. Just be careful about temperatures with geraniums. Ge is much more forgiving in class B than silicon.
C
Cursitor Doom
Guest
On Thu, 6 Jan 2022 16:19:11 -0800 (PST), Tabby <tabbypurr@gmail.com>
wrote:
Well, maybe, but certainly not when it comes to soldering the device
in!
I sorted though thousands of transistors and ICs here over the course
of days and didn\'t find anything \"quite right\" for the job, so I\'m
going to order some discrete Ge Russian devices off Ebay which are
well vouched-for by the vintage radio community in this application.
Anything but Chinese! Those fuckers will never get a penny more of my
cash now we know they\'re developing bioweapons.
wrote:
Well, maybe, but certainly not when it comes to soldering the device
in!
I sorted though thousands of transistors and ICs here over the course
of days and didn\'t find anything \"quite right\" for the job, so I\'m
going to order some discrete Ge Russian devices off Ebay which are
well vouched-for by the vintage radio community in this application.
Anything but Chinese! Those fuckers will never get a penny more of my
cash now we know they\'re developing bioweapons.