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Old 6th May 2014, 04:31 AM   #12671
stajo is online now stajo  Sweden
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Quote:
Originally Posted by Salas View Post
20K (with standard 2.2uF couplers).
Can it take 10 k with larger?
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Old 6th May 2014, 10:01 AM   #12672
Salas is offline Salas  Greece
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Quote:
Originally Posted by stajo View Post
Can it take 10 k with larger?
It can, the output impedance is only 40-50 Ohm. Use 4u7.
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Old 6th May 2014, 10:24 AM   #12673
Siberia is offline Siberia  Lithuania
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Fellow black gold enthusiasts, I'm seeking some advice.
I've broke my Benz Ace SM (0.8 mV) cartridge and looking to get a repair or replacement.
I'm offered SL or SH stock versions of the same cartridge by the company.
Second option, full repair of my SM that would take about 3 weeks and more.

Question: what are downturns or gains choosing SL / SH vs SM?
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Old 6th May 2014, 10:30 AM   #12674
Salas is offline Salas  Greece
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SL is even better, but it will need 59dB of gain.
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Old 6th May 2014, 10:57 AM   #12675
Siberia is offline Siberia  Lithuania
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Precisely my problem. Pearl 2 is @ 55 dB. And it's rather low with DCB1, TSSA and 89.5 dB speakers. On the longer run I plan FS which can provide extra gain. Would SH be even worse then respectively?
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Old 6th May 2014, 06:04 PM   #12676
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Something wrong in the signal side with a strong ground loop, or the bias is off in the stages, or the power side has a problem, I would look for. Can you post a photo of the build, and data about various points voltages in respect to ground? RAIL-GND, TP1-GND, TP2-GND, Q4 drain-GND, Q6 drain-GND. Are both sinks rising temperature?
Hi Salas,

Thank you for your support.

Your questions put me on the track! A rookie mistake, I am ashamed for telling you the truth.

Well, it is working like a charm.

It needs now a beautiful case, because (sorry for the quality of the pict):
Click the image to open in full size.
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Old 6th May 2014, 06:34 PM   #12677
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Default Simplicity itself

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Originally Posted by Turbon View Post
Hi.

Do you or Rick have a schematic of a suitable circuit?

Regards
I am still working on getting the basic circuit to work but as soon as this happens I am going to place the chokes within the box and close to the B+ input on the phono board place a approx 1800 uF cap across the + and -, along with the suggested 10kR bleed resistor as advised by SALAS.

The caps will be RIGHT AT the power input.

The existing wires from the standard supply are right at hand here - just splice it in.

Low resistance and as much inductance as your box will allow. I will be using some chokes Jeff Medwin got someone to make for him a few years ago for his LOFTIN WHITE based amplifier. Seven ohms resistance and 15/100'ths of a Henry - 600 mA rated. Leads are multiple strands of clear jacketed KIMBER wire. Don't know if he is still having them made. After giving up on making the amp they were intended for I have wondered where to put them to use.
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Old 6th May 2014, 09:01 PM   #12678
RCruz is offline RCruz  Switzerland
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Originally Posted by Tea-Bag View Post
Thanks exactly what I did recently with one board, fixed it just by lighting the LEDS up one at a time on DMM and realizing one would not turn on!!

I always measure every component before soldering... than I solder the most sensible parts (like leds and fets) and measure those and in the end I start populating the resistors (also measured).

This way I always know where the problem might come from
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Old 6th May 2014, 09:05 PM   #12679
RCruz is offline RCruz  Switzerland
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Quote:
Originally Posted by Siberia View Post
Fellow black gold enthusiasts, I'm seeking some advice.
I've broke my Benz Ace SM (0.8 mV) cartridge and looking to get a repair or replacement.
I'm offered SL or SH stock versions of the same cartridge by the company.
Second option, full repair of my SM that would take about 3 weeks and more.

Question: what are downturns or gains choosing SL / SH vs SM?
Hi Siberia

I also have one benz Ace M that needs repair or replacement.... never could get in contact with the company.... would you please PM me some coordinates ?
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Old 6th May 2014, 10:21 PM   #12680
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Default My first attempt at semiconductors ...

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Originally Posted by RCruz View Post
I always measure every component before soldering... than I solder the most sensible parts (like leds and fets) and measure those and in the end I start populating the resistors (also measured).

This way I always know where the problem might come from
and I have much to learn.

Your advice will be remembered for the next project, I can assure you.
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