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Old 17th August 2011, 06:17 AM   #831
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Now that I look at it, those sinks don't seem connected to ground.... BAD mmmmkay, all exposed conductive surfaces should be grounded.
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Old 17th August 2011, 02:15 PM   #832
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Quote:
Originally Posted by digits View Post
Now that I look at it, those sinks don't seem connected to ground.... BAD mmmmkay, all exposed conductive surfaces should be grounded.
Thanks for your concern. Actually I have run a grounding wire down through the bottom of the case and out to all the metalwork. Ohmmeter says it's all grounded.

Tim
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Old 17th August 2011, 02:24 PM   #833
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Awesome, then you can touch it
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Old 18th August 2011, 08:16 PM   #834
BigE is offline BigE  Canada
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Originally Posted by Bksabath View Post
150 mU rail
CRCLRC + same small ones as Papa said

100 mU in the power suply

The 2 mono blocks have their own banks 50 mU rail (total of 40 10 mU caps)

At present I may ad another 50 mU rail if I go By amp or ballanced so each board got its own

And 36mU on the mains DC filter.
May I ask what you used for a soft-start circuit?
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Old 18th August 2011, 10:42 PM   #835
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BigE
shure you can.
Simple transistor/relay timer.

once power up capacitor charges and trip a transistor which operate a relay that by pass the NTC

One day I will get it tidy and then post SCH for all.

Same pictures and more on my My F5 tread.

PIC Just a teaser in the corner the Aux suply and controll circuit.
In the back ground the 12mU caps for DC filter
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Old 19th August 2011, 02:15 AM   #836
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Actualy found drawing of surmentioned circuit

http://www.diyaudio.com/forums/attac...ntroll-sch.doc
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Old 20th August 2011, 12:15 PM   #837
GeeVee is offline GeeVee  Australia
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Default Pass Aleph P1.7 Preamp

Hi all

I would like to share my latest creation, My just completed Pass Aleph P1.7

I was completed this afternoon, and has been running all day with background music

The matching Pass X-Ono, was completed some time ago. (see Post 262 and 263) of this thread.

Now to finish off my 1.2 power amplifiers. Quite a bit of work still required.

Thanks
George
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Old 20th August 2011, 01:47 PM   #838
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@GeeVee,

congratulations on this excellent piece of work. This looks really professional. Wish I had so much craftsmanship.
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Old 20th August 2011, 02:28 PM   #839
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Nostalgic look, sorta mix of a Threshold FET-Two MKI and a Spectral DMC preamp.
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Old 20th August 2011, 11:55 PM   #840
GeeVee is offline GeeVee  Australia
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Default Pass Aleph P1.7 Preamp

Hi Blistard and Jacco

Thanks for your kind words. You are correct in the Spectral look. That was exactly what I was trying to achieve.
The only thing remaining is to change the knobs on the x-ono, as shown in post 262 and 263 to match.

I would like to share how I made the front panell.

The case is an off the shelf unit from the VT4C shop in Hong Kong.

The front is a 2 part affair, with a removable sub panell.

I drew up the front lettering in AutoCad (could use any other package for that matter), and printed them on overhead transperency film.

I then got 2mm thick clear acrylic cut to size for me, and then sandwiched the lot together. There are fastening screws from the rear.

It gives the front a really nice depth

Regards

George.
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