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Old 27th July 2010, 06:45 AM   #251
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The zener diodes are all a bit flakey

I got 1n4742 as johngalt47 suggested

But this is a whole lot better.

I have another question.

In the quanhoa's design on the phono board R22 and R23 is 820k. But on the original design it is 1M. If i want to try the original riaa circuit should i use 820k or 1M? Or does it not matter?

Last edited by tangmonster; 27th July 2010 at 06:51 AM.
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Old 27th July 2010, 06:53 AM   #252
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Quote:
Originally Posted by tangmonster View Post
The zener diodes are all a bit flakey

I got 1n4742 as johngalt47 suggested

But this is a whole lot better.

I have another question.

In the quanhoa's design on the phono board R22 and R23 is 820k. But on the original design it is 1M. If i want to try the original riaa circuit should i use 820k or 1M? Or does it not matter?
that is 820K//, no 1 M!
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Old 27th July 2010, 06:58 AM   #253
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So even if i use the original riaa circuit with mkp 100nF and 33nF I must still use 820k?
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Old 27th July 2010, 07:42 AM   #254
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Quote:
Originally Posted by tangmonster View Post
So even if i use the original riaa circuit with mkp 100nF and 33nF I must still use 820k?
Yes! you can keep it!
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Old 27th July 2010, 12:41 PM   #255
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Default Phono D3A PCBs

Quote:
Originally Posted by quanghao View Post
please let me know if you have not received PCB phono ASH

A. Phono D3A PCBs arrived :
1. pred
2. johngalt47
3. guglielmope
4. Loboone
5.johngalt47
6.tangmonster
7. Pilsern
8. jormajj
9.khaho
10. klaju1955
..........

Phono D3A PCBs not arrived :
1. johngalt47
2. 2. vanofmonks
3. John Caswell
4. alex1946audio
5. Torsken
......
I don't have received yet the boards
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Old 29th July 2010, 12:41 PM   #256
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Quote:
Originally Posted by tangmonster View Post
So even if i use the original riaa circuit with mkp 100nF and 33nF I must still use 820k?
Hi Tang,

Im not a krack in electronics, but if I understand it right, the 1M resistor is going into the RIAA network calculation.
Have a look at the Andreas side Audio Design Guide, there is on Phono 4 the calculator with the exact values, or ask Andrea himself.

Klaus
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Old 29th July 2010, 02:27 PM   #257
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You are indeed correct!!!

Thanks man. That will teach me to ask questions and just blindingly trust other people. :P

NO I can't keep it quanghao.
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Old 29th July 2010, 03:45 PM   #258
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klaju1955 , tangmonster
Audiodesign will answer you, when he comes back!

New the value and the circuit, i was sent to you, Audiodesign was calculate and i test 2 option, and i like new the value.

About the 1M//. or 820//. he like 2 x 820K( parallel)
Quanghao
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Old 30th July 2010, 04:20 PM   #259
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Location: Berkshire UK
Default Despatch of replacement phono PCB

Hi Quanghao,
Have you any idea when you will despatch the replacement phono PCBs for those of us who have not received them yet?

Regards

John Caswell
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Old 31st July 2010, 01:55 AM   #260
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Hello!
The PCB is you do not get me very sad thing, and I'll send for you again. PCB hopes will hand to you, no destination Most PCB is not your phone number. I work with prestige, not profit. If you move to make sure, faster, and make sure to place it very expensive.
I've used

You did not get the PCB address please send me an e-mail with the following information:
Name:
Address:
Phone:
Nick DIY:
PCB name:

Extremely thank
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