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Transformer

W

WAZ

Jan 1, 1970
0
I am preparing Audio amp using, TBA810, this PCB require 12-0-12 V and
1-Amp Transformer, I have purchased

2-Amp 12-0-12 and this has only two O/P terminals(i.e +12 -12 There is
no Zero) Can I connect 0 terminal of

PCB to body of transformer? One other thing , Can i subsitute X-mer of
12-0-12 2-Amp With 9-0-9V 1.5Amp.


Thanks Wasim Shaikh
 
E

Eeyore

Jan 1, 1970
0
WAZ said:
I am preparing Audio amp using, TBA810, this PCB require 12-0-12 V and
1-Amp Transformer, I have purchased

2-Amp 12-0-12 and this has only two O/P terminals(i.e +12 -12 There is
no Zero) Can I connect 0 terminal of

PCB to body of transformer? One other thing , Can i subsitute X-mer of
12-0-12 2-Amp With 9-0-9V 1.5Amp.

A 12-0-12 transformer wil provide about 16-0-16V DC since the power supply
capacitors charge up to the peak value of the AC voltage.

The 9-0-9 transformer will be the one to use.

Graham
 
J

John Fields

Jan 1, 1970
0
I am preparing Audio amp using, TBA810, this PCB require 12-0-12 V and
1-Amp Transformer, I have purchased 2-Amp 12-0-12 and this has only two
O/P terminals(i.e +12 -12 There is no Zero) Can I connect 0 terminal of
PCB to body of transformer?

---
No.

If your PCB needs 12-0-12V that needs to come from a 24V transformer
with a center tap because the power supply on the PCB will [more
than likely] look like this: (View in Courier)

|
<--XFMR | PCB-->
|
MAINS>----+ +---<<-----[CR1>]---+--->+16v
| | 12| |
P||S | |
R||E---<<--+--[C1+]----+
I||C 0| | |
| | | +-----------|--->GND
MAINS>----+ +---<<-----[CR2>]---+
12|
|
|

Note that the transformer's center tap is used for the amplifier's
ground, so there's no way that you can use the body of the
transformer for ground, since it's not even connected to the winding
electrically.
---
one other thing , Can i subsitute X-mer of
12-0-12 2-Amp With 9-0-9V 1.5Amp.

---
If it doesn't have a center tap, no.

If it does, you won't be able to get full power out of the amp.

Why don't you just get the right transformer?
 
D

default

Jan 1, 1970
0
I am preparing Audio amp using, TBA810, this PCB require 12-0-12 V and
1-Amp Transformer, I have purchased 2-Amp 12-0-12 and this has only two
O/P terminals(i.e +12 -12 There is no Zero) Can I connect 0 terminal of
PCB to body of transformer?

---
No.

If your PCB needs 12-0-12V that needs to come from a 24V transformer
with a center tap because the power supply on the PCB will [more
than likely] look like this: (View in Courier)

|
<--XFMR | PCB-->
|
MAINS>----+ +---<<-----[CR1>]---+--->+16v
| | 12| |
P||S | |
R||E---<<--+--[C1+]----+
I||C 0| | |
| | | +-----------|--->GND
MAINS>----+ +---<<-----[CR2>]---+
12|
|
|

Note that the transformer's center tap is used for the amplifier's
ground, so there's no way that you can use the body of the
transformer for ground, since it's not even connected to the winding
electrically.
---
one other thing , Can i subsitute X-mer of
12-0-12 2-Amp With 9-0-9V 1.5Amp.

---
If it doesn't have a center tap, no.

If it does, you won't be able to get full power out of the amp.

Why don't you just get the right transformer?


Ditto that. get the right transformer or wind what you need.
 
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