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Old 9th December 2008, 02:47 AM   #41
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Thanks. I need to check the price 1st.
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Old 10th December 2008, 08:20 AM   #42
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Richard Murdey
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30 Euro for the board
1 Euro for nonstandard drill size
+ 8.50 Euro for air mail shipping
_____________________
39.50 Euro
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Old 10th December 2008, 12:16 PM   #43
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Thanks for your information.
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Old 17th December 2008, 12:58 PM   #44
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Phonoclone 3 beta boards were delivered this evening. I will ship them to the beta testers tomorrow.
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Old 18th December 2008, 03:23 AM   #45
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Parts list for beta board:

8 OP27
2 BD135 or equivalent
2 BD136 or equivalent

2 47R [carbon, provided in beta kit]
2 47R adjust to match cartridge impedance
4 220R
8 1k
2 ~1k adjust for desired gain
4 2k2
8 15k
6 33k
2 110k match
2 768k match (750k when using 2.9 nF rather than 3 nF for C2)

8 1 nF (match to 1x1 nF C1, 3x1 nF C2) [mica, provided in beta kit]
2 4.7 uF Black Gate N or substitute
20-24 100 uF/25V/2.5 mm lead spacing
4 1000 uF/25V/5mm lead spacing

8 8pin DIL sockets, optional
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Old 20th December 2008, 05:27 AM   #46
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I spent a few hours today putting it together:



Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

1. It works. No noise or hum. No obvious problems.

2. Yay!

3. Too early to do any evaluation, but definitely promising. It's different enough from the others than I'm going to have to careful...
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Old 20th December 2008, 07:39 AM   #47
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The only thing that needs to be addressed immediately is the voltage output ended up half the value I expected. My phonoclone is now running at +/- 5V rather than +/- 10V intended.

That was because I was an idiot and ignored what Werner wrote earlier:

"The reference voltage (voltage between C4 and R4) is (approximately, ignoring R6) Vin * (R1||R2) / (R4+R5+R1||R2)

Quote:
>Rather (R1//R3) / [(R1//R3)+R4+R5+R6]
"

I dunno how I missed that. I'll update the schematic values to sort that out shortly.
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Old 20th December 2008, 07:56 AM   #48
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development board, please note updated component values
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Old 20th December 2008, 10:25 AM   #49
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Richard,


are these the same size as the BE boards?


Fran
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Old 20th December 2008, 01:00 PM   #50
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Yes, drop in replacement.

The case in the photo is where the BE boards you have used to be.
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