This is funny...

P

Phil Allison

Guest
Hi,

go to the Jaycar site and enter TIP31 in the search box.

https://www.jaycar.com.au/

Lots of their transistors have grown extra legs....


...... Phil
 
T

Trevor Wilson

Guest
On 26/08/2021 2:26 pm, Sylvia Else wrote:
On 26-Aug-21 9:37 am, Clocky wrote:
On 25/08/2021 6:48 am, Phil Allison wrote:

Hi,

go to the Jaycar site and enter TIP31 in the search box.

https://www.jaycar.com.au/

Lots of their transistors have grown extra legs....


.....   Phil


Their default \"we don\'t have an image for that\" image. Big deal.

Except that they do have a generic TO-220 image, as for ZT2466 for example.

Why you would search Jaycar for those components is the funny part.


If you need a TIP31 today, it makes sense.

Sylvia.

**Not really. Jaycar and, to a lesser extent, WES, have poor form when
it comes to counterfeit and sub-spec components.

True story:

A few years back, I worked part time for a mate who needed an audio tech
a couple of days per week. Most of his business was TV and videos. I
recall listening to his TV tech swearing one day. I toddled up and asked
him what the problem was. He explained that he had installed the same
MOSFET 7 times into a TV set and it blew every time, despite carefully
checking everything. I asked where the MOSFETs came from. He told me
that they were supplied by WES and cost $2.75 each. I suggested he buy
one from RS or Element14 (might have been Farnell back then), as I had
found that WES had supplied some dodgy TO3 BJTs to me once. He expressed
surprise that anyone would bother counterfeiting a $2.75 MOSFET.
Nonetheless, he ordered a replacement from Element14. It worked
perfectly. WES graciously refunded the full purchase price of the 7
dodgy MOSFETs, but not the day and a half labour it took to bugger around.

The only things I buy from Jaycar are nuts and bolts and other bits of
hardware. It is just not worth buying their shit. It is just rubbish.

BTW: This just arrived:

https://www.aliexpress.com/item/1005001820547522.html?spm=a2g0s.9042311.0.0.6e9b4c4djQByBJ

Bloody brilliant. It was supposed to come with a power supply, but that
didn\'t arrive, but I found an old 12V 3A wall wart which works a treat.
10 seconds to 300 degrees C.
 
T

Trevor Wilson

Guest
On 26/08/2021 2:26 pm, Sylvia Else wrote:
On 26-Aug-21 9:37 am, Clocky wrote:
On 25/08/2021 6:48 am, Phil Allison wrote:

Hi,

go to the Jaycar site and enter TIP31 in the search box.

https://www.jaycar.com.au/

Lots of their transistors have grown extra legs....


.....   Phil


Their default \"we don\'t have an image for that\" image. Big deal.

Except that they do have a generic TO-220 image, as for ZT2466 for example.

Why you would search Jaycar for those components is the funny part.


If you need a TIP31 today, it makes sense.

Sylvia.

**Not really. Jaycar and, to a lesser extent, WES, have poor form when
it comes to counterfeit and sub-spec components.

True story:

A few years back, I worked part time for a mate who needed an audio tech
a couple of days per week. Most of his business was TV and videos. I
recall listening to his TV tech swearing one day. I toddled up and asked
him what the problem was. He explained that he had installed the same
MOSFET 7 times into a TV set and it blew every time, despite carefully
checking everything. I asked where the MOSFETs came from. He told me
that they were supplied by WES and cost $2.75 each. I suggested he buy
one from RS or Element14 (might have been Farnell back then), as I had
found that WES had supplied some dodgy TO3 BJTs to me once. He expressed
surprise that anyone would bother counterfeiting a $2.75 MOSFET.
Nonetheless, he ordered a replacement from Element14. It worked
perfectly. WES graciously refunded the full purchase price of the 7
dodgy MOSFETs, but not the day and a half labour it took to bugger around.

The only things I buy from Jaycar are nuts and bolts and other bits of
hardware. It is just not worth buying their shit. It is just rubbish.

BTW: This just arrived:

https://www.aliexpress.com/item/1005001820547522.html?spm=a2g0s.9042311.0.0.6e9b4c4djQByBJ

Bloody brilliant. It was supposed to come with a power supply, but that
didn\'t arrive, but I found an old 12V 3A wall wart which works a treat.
10 seconds to 300 degrees C.
 
T

Trevor Wilson

Guest
On 26/08/2021 2:26 pm, Sylvia Else wrote:
On 26-Aug-21 9:37 am, Clocky wrote:
On 25/08/2021 6:48 am, Phil Allison wrote:

Hi,

go to the Jaycar site and enter TIP31 in the search box.

https://www.jaycar.com.au/

Lots of their transistors have grown extra legs....


.....   Phil


Their default \"we don\'t have an image for that\" image. Big deal.

Except that they do have a generic TO-220 image, as for ZT2466 for example.

Why you would search Jaycar for those components is the funny part.


If you need a TIP31 today, it makes sense.

Sylvia.

**Not really. Jaycar and, to a lesser extent, WES, have poor form when
it comes to counterfeit and sub-spec components.

True story:

A few years back, I worked part time for a mate who needed an audio tech
a couple of days per week. Most of his business was TV and videos. I
recall listening to his TV tech swearing one day. I toddled up and asked
him what the problem was. He explained that he had installed the same
MOSFET 7 times into a TV set and it blew every time, despite carefully
checking everything. I asked where the MOSFETs came from. He told me
that they were supplied by WES and cost $2.75 each. I suggested he buy
one from RS or Element14 (might have been Farnell back then), as I had
found that WES had supplied some dodgy TO3 BJTs to me once. He expressed
surprise that anyone would bother counterfeiting a $2.75 MOSFET.
Nonetheless, he ordered a replacement from Element14. It worked
perfectly. WES graciously refunded the full purchase price of the 7
dodgy MOSFETs, but not the day and a half labour it took to bugger around.

The only things I buy from Jaycar are nuts and bolts and other bits of
hardware. It is just not worth buying their shit. It is just rubbish.

BTW: This just arrived:

https://www.aliexpress.com/item/1005001820547522.html?spm=a2g0s.9042311.0.0.6e9b4c4djQByBJ

Bloody brilliant. It was supposed to come with a power supply, but that
didn\'t arrive, but I found an old 12V 3A wall wart which works a treat.
10 seconds to 300 degrees C.
 
S

Sylvia Else

Guest
On 26-Aug-21 3:34 pm, Trevor Wilson wrote:
**Not really. Jaycar and, to a lesser extent, WES, have poor form when
it comes to counterfeit and sub-spec components.

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.

Should have arrived yesterday, but StarTrak pulled the no-one home stunt
again, when there were two people home.

Sylvia.
 
S

Sylvia Else

Guest
On 26-Aug-21 3:34 pm, Trevor Wilson wrote:
**Not really. Jaycar and, to a lesser extent, WES, have poor form when
it comes to counterfeit and sub-spec components.

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.

Should have arrived yesterday, but StarTrak pulled the no-one home stunt
again, when there were two people home.

Sylvia.
 
P

Phil Allison

Guest
Sylvia Else wrote:
==================
Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.

** You should be safe - the dodgy stuff was all TO3 pretending to be Motororla.

And HOTs like TW says.


...... Phil
 
P

Phil Allison

Guest
Sylvia Else wrote:
==================
Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.

** You should be safe - the dodgy stuff was all TO3 pretending to be Motororla.

And HOTs like TW says.


...... Phil
 
P

Phil Allison

Guest
Sylvia Else wrote:
==================
Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.

** You should be safe - the dodgy stuff was all TO3 pretending to be Motororla.

And HOTs like TW says.


...... Phil
 
T

Trevor Wilson

Guest
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


** You should be safe - the dodgy stuff was all TO3 pretending to be Motororla.

And HOTs like TW says.

**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.
 
T

Trevor Wilson

Guest
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


** You should be safe - the dodgy stuff was all TO3 pretending to be Motororla.

And HOTs like TW says.

**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.
 
T

Trevor Wilson

Guest
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


** You should be safe - the dodgy stuff was all TO3 pretending to be Motororla.

And HOTs like TW says.

**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.
 
T

Trevor Wilson

Guest
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


** You should be safe - the dodgy stuff was all TO3 pretending to be Motororla.

And HOTs like TW says.

**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.
 
S

Sylvia Else

Guest
On 26-Aug-21 7:47 pm, Trevor Wilson wrote:
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


  **  You should be safe - the dodgy stuff was all TO3 pretending to
be Motororla.
     And HOTs like TW says.


**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.

Having gone through a \"how the hell does this work\" phase with the
circuit diagram, I\'ve realised that since it\'s a DC coupled amplifier,
all the capacitively coupled BF472 parts of the circuit are doing is
improving the transient response, which is probably not that relevant
except when operating it in X-Y mode. I suspect that any high voltage
PNP transistor would do just as well.

Sylvia.
 
S

Sylvia Else

Guest
On 26-Aug-21 7:47 pm, Trevor Wilson wrote:
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


  **  You should be safe - the dodgy stuff was all TO3 pretending to
be Motororla.
     And HOTs like TW says.


**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.

Having gone through a \"how the hell does this work\" phase with the
circuit diagram, I\'ve realised that since it\'s a DC coupled amplifier,
all the capacitively coupled BF472 parts of the circuit are doing is
improving the transient response, which is probably not that relevant
except when operating it in X-Y mode. I suspect that any high voltage
PNP transistor would do just as well.

Sylvia.
 
S

Sylvia Else

Guest
On 26-Aug-21 7:47 pm, Trevor Wilson wrote:
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


  **  You should be safe - the dodgy stuff was all TO3 pretending to
be Motororla.
     And HOTs like TW says.


**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.

Having gone through a \"how the hell does this work\" phase with the
circuit diagram, I\'ve realised that since it\'s a DC coupled amplifier,
all the capacitively coupled BF472 parts of the circuit are doing is
improving the transient response, which is probably not that relevant
except when operating it in X-Y mode. I suspect that any high voltage
PNP transistor would do just as well.

Sylvia.
 
K

keithr0

Guest
On 26/08/2021 7:47 pm, Trevor Wilson wrote:
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


  **  You should be safe - the dodgy stuff was all TO3 pretending to
be Motororla.
     And HOTs like TW says.


**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.

Here\'s a weird one, the 17 year old plasma TV died with a minor
explosion from somewhere inside. I couldn\'t be bothered to fix it so I
bought a new \"Smart\" 4K TV. The TEAC from the lounge replaced the old
plasma in the family room and the new TV went into the lounge. I
connected the new TV to the Fetch box with the same HDMI cable that the
TEAC had used for the last 3 years - the TV couldn\'t see the Fetch. Got
another cable - every thing was fine but the cable was a bit short, so I
swapped with the one currently working on the other TV - didn\'t work
either. So this TV only works with one out of 3 apparently identical
cables. Strange.
 
K

keithr0

Guest
On 26/08/2021 7:47 pm, Trevor Wilson wrote:
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


  **  You should be safe - the dodgy stuff was all TO3 pretending to
be Motororla.
     And HOTs like TW says.


**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.

Here\'s a weird one, the 17 year old plasma TV died with a minor
explosion from somewhere inside. I couldn\'t be bothered to fix it so I
bought a new \"Smart\" 4K TV. The TEAC from the lounge replaced the old
plasma in the family room and the new TV went into the lounge. I
connected the new TV to the Fetch box with the same HDMI cable that the
TEAC had used for the last 3 years - the TV couldn\'t see the Fetch. Got
another cable - every thing was fine but the cable was a bit short, so I
swapped with the one currently working on the other TV - didn\'t work
either. So this TV only works with one out of 3 apparently identical
cables. Strange.
 
K

keithr0

Guest
On 26/08/2021 7:47 pm, Trevor Wilson wrote:
On 26/08/2021 4:44 pm, Phil Allison wrote:
Sylvia Else wrote:
==================

Well, I hope the BF472 I\'ve ordered from WES are the real deal. They
seem hard to source now.


  **  You should be safe - the dodgy stuff was all TO3 pretending to
be Motororla.
     And HOTs like TW says.


**Agreed. I order a lot of stuff from WES and have only really had
problems with their audio cables and TO3 transistors. Having said that,
their premium audio cables (which are not expensive) are superb. Hand
soldered, good quality RCA connectors, foil and braid shielded and PE
insulation. They look nice too. Never had a problem with one, which is
more than I could say about their cheap range. They are mechanically and
electrically poor quality.

Here\'s a weird one, the 17 year old plasma TV died with a minor
explosion from somewhere inside. I couldn\'t be bothered to fix it so I
bought a new \"Smart\" 4K TV. The TEAC from the lounge replaced the old
plasma in the family room and the new TV went into the lounge. I
connected the new TV to the Fetch box with the same HDMI cable that the
TEAC had used for the last 3 years - the TV couldn\'t see the Fetch. Got
another cable - every thing was fine but the cable was a bit short, so I
swapped with the one currently working on the other TV - didn\'t work
either. So this TV only works with one out of 3 apparently identical
cables. Strange.
 
C

Clocky

Guest
On 26/08/2021 12:26 pm, Sylvia Else wrote:
On 26-Aug-21 9:37 am, Clocky wrote:
On 25/08/2021 6:48 am, Phil Allison wrote:

Hi,

go to the Jaycar site and enter TIP31 in the search box.

https://www.jaycar.com.au/

Lots of their transistors have grown extra legs....


.....   Phil


Their default \"we don\'t have an image for that\" image. Big deal.

Except that they do have a generic TO-220 image, as for ZT2466 for example.

Why you would search Jaycar for those components is the funny part.


If you need a TIP31 today, it makes sense.

Sylvia.

Not when they are counterfeit or underrated components... and you never
know when you buy from Jaycar.
 

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