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Chip Amps Amplifiers based on integrated circuits

NE 5532 PreAmplifier from Doug Self, Elektor 2012
NE 5532 PreAmplifier from Doug Self, Elektor 2012
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Old 5th February 2018, 10:06 AM   #61
calpe is offline calpe  Gibraltar
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Just to mention to the late builders (like me) the NE5532's that were available when i purchased them were the NE5532AP.

http://uk.farnell.com/texas-instrume...ngdom%2Fsearch

You'll see here the supply voltage range is +5v - 15v.
The Elektor project has 17v supplies from the PSU.

In the above technical sheet for this i.c. it shows max. voltage is 22v, but recommended supply is 15v.

I wrote to Elektor explaining this and they told me to play it safe reduce R2 & R4 from 1.3k to 1.1k, which i have done, reducing the PSU o/p from 17 to 15v.
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Old 5th February 2018, 10:28 AM   #62
AndrewT is offline AndrewT  Scotland
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answers in the other Thread where you posed the same question.
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Old 5th February 2018, 02:21 PM   #63
calpe is offline calpe  Gibraltar
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In Elektor 06-2012, page 26, it give information of 'Miscellaneous - Not on PCB'.
Can someone clear up what is written of the fuse F1 (230VAC) = fuse, 0.315A Antisurge?

What is the correct mains input fuse that should be used on the mains input circuit?
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Old 5th February 2018, 03:36 PM   #64
AndrewT is offline AndrewT  Scotland
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What is the rating of the mains transformer?
That determines the fuse rating.

eg.
230Vac 100VA uses ~ 100/230 = 0.43A and would need a close rated fuse of about 500mA. i.e. T500mA
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Last edited by AndrewT; 5th February 2018 at 03:39 PM.
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Old 5th February 2018, 05:12 PM   #65
Mooly is offline Mooly  United Kingdom
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NE 5532 PreAmplifier from Doug Self, Elektor 2012
Quote:
Originally Posted by calpe View Post
In Elektor 06-2012, page 26, it give information of 'Miscellaneous - Not on PCB'.
Can someone clear up what is written of the fuse F1 (230VAC) = fuse, 0.315A Antisurge?

What is the correct mains input fuse that should be used on the mains input circuit?
I have just answered this in another thread you posted to.

Please don't keep posting the same questions to multiple threads, its as bad as starting two threads in the hope of getting quicker answers.
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Old 5th February 2018, 09:02 PM   #66
chienmort is offline chienmort
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Quote:
Originally Posted by AndrewT View Post
What is the rating of the mains transformer?
That determines the fuse rating.

eg.
230Vac 100VA uses ~ 100/230 = 0.43A and would need a close rated fuse of about 500mA. i.e. T500mA


The surge may be too much for a 500mA unless you use an anti surge fuse. I would start with a 1A.
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Old 6th February 2018, 08:07 AM   #67
AndrewT is offline AndrewT  Scotland
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Quote:
Originally Posted by AndrewT View Post
What is the rating of the mains transformer?
That determines the fuse rating.

eg.
230Vac 100VA uses ~ 100/230 = 0.43A and would need a close rated fuse of about 500mA. i.e. T500mA
Quote:
Originally Posted by chienmort View Post
The surge may be too much for a 500mA unless you use an anti surge fuse. I would start with a 1A.
T500mA is a Time delayed fuse. That is what the "T" tells me.
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Old 6th February 2018, 08:49 AM   #68
calpe is offline calpe  Gibraltar
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Apologies Mooly, best to delete those other posts....

And thanks guys
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Old 6th February 2018, 08:52 AM   #69
Mooly is offline Mooly  United Kingdom
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NE 5532 PreAmplifier from Doug Self, Elektor 2012
I think the other posts have all had replies to them and so it would not be fair to delete them now.

Just remember to ask the one question in the appropriate thread
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Old 8th February 2018, 03:43 PM   #70
calpe is offline calpe  Gibraltar
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Ideas please!

I now have the connector inserted into K17 on the Input PCB.

Inserting the other end into the Front Panel PCB into K1 socket it's now impossible to have the Front Panel PCB flush up against my metal case front panel, due to the size of the plug & socket.

Any ideas on what i can use to be able to mount my Front Panel PCB as it'll have to fall back a few centimeters?

Apart from that wiring nearly finished.
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