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Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, etc.

Building a Douglas Self design preamp
Building a Douglas Self design preamp
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Old 12th February 2017, 05:31 PM   #21
fernfrost is offline fernfrost  Sweden
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Quote:
Originally Posted by calpe View Post
Just to offer if anyone is interested, i have spares available for the Preamplifier 2012. Spares such as resistors, capacitors, relays, i.c.'s, potentiometers etc etc.
Place your request here, prices will be promising
Do you have C12 = 10μF 20% 63V, 6.3mm diam., 2.5mm pitch polarized for the power supply?

Depending on shipping to sweden i would be interested in a pair
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Old 12th February 2017, 09:15 PM   #22
calpe is offline calpe  Gibraltar
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I probably have but need to check tomorrow, as I don't have the components at home, I'll let you know in the morning
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Old 13th February 2017, 10:30 AM   #23
calpe is offline calpe  Gibraltar
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Note!
C12 is a 10uF 20% 63V, 6.3MM diam., 2.5mm pitch.

In Elektor's BOM list it was listed incorrectly with Farnell code 1236680.
Under this number it is actually a Non-Polarised capacitor 10uF 63V.

On page 26 of Preamplifier 2012 (3) C12 is actually a 10uF 63V, and should not be Non-Polarised.

I have some 10uF 100v. Their size are ok.

Last edited by calpe; 13th February 2017 at 10:32 AM. Reason: add text
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Old 24th April 2017, 03:14 PM   #24
calpe is offline calpe  Gibraltar
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My Elektor Q-Watt amp (dual ch.) is now up and running, quality is spot on!

Post #368

http://www.diyaudio.com/forums/chip-...t-project.html

I hope now to return to the Elektor Preamplifier 2012 as soon as possible
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Old 27th April 2017, 07:34 AM   #25
calpe is offline calpe  Gibraltar
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Can anyone help with regards to templates to be able to drill the required holes for the
Input PCB (x2) and also for the Front Panel PCB?

I was a step too quick and all components, sockets etc. are soldered in place.

Any ideas please.
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Old 27th April 2017, 04:57 PM   #26
dennismiller55 is offline dennismiller55  United States
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Couple of thoughts:

On one of the other associated forum threads someone posted the files for the front and back panels. The files are to be used with the software "Front Panel Express". You could print the panels and use as a template.

I made high resolution scans of my boards before stuffing them. You are welcome to these files. I also have the Front Panel Express files. Just send me a PM.
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Old 2nd October 2017, 02:54 PM   #27
calpe is offline calpe  Gibraltar
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Ive only just been able to get back to this very delayed Preamplifier project.
Ive emailed Schaeffer AG: Home in the hope they can do the work i need for the drilling etc.
Let's see
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Old 3rd October 2017, 08:41 AM   #28
calpe is offline calpe  Gibraltar
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I am using the R.S. case 665-7719 | PF-19 Ventilated Rackmount Enclosure with Handles, 2U, 84 HP, 245mm Deep |

Might anyone having used this case have the Front Panel Designer files they used?

With thanks
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Old 10th October 2017, 09:22 AM   #29
calpe is offline calpe  Gibraltar
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NE 5532 PreAmplifier from Doug Self, Elektor 2012

If i'm to use the Front Panel Designer files from post 18, then based on muskyhuntr's post 6, i would like to ask about the following:-

Power On/Off switch used and order number?

Toggle Switches used for: -
Tone Defeat
MM / MC
IEC Amendment

Mains input socket (i need 240v) used and order number?

With thanks
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Old 10th October 2017, 04:06 PM   #30
muskyhuntr is offline muskyhuntr  United States
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The mains input is FN9263-4-06 and available from DigiKey.
The toggle switches were originally purchased from DigiKey but seem to be no longer avaiable. Try EBay. Black R13-402 Round ON-OFF-ON Maintained SPDT Toggle Switch 3Pin 3Position | eBay. The part number for these switches is R13-402.
The power switch was something I had on hand. No information is available.

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