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Old 30th December 2010, 10:45 PM   #601
ra7 is offline ra7  United States
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Tea-bag,
You mentioned the lack of gain? Is it really low or a little low with the DL103?

I'll be building the Salas shunt reg too... making use of the extra hypno boards
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Old 31st December 2010, 03:12 PM   #602
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Originally Posted by Tea-Bag View Post

In order to achieve good gain, decreasing R14 did not add much gain, but replacing R15 jumper with a 1k resistor did give more gain. It could still use a bit more.
Just for my own curiosity, was this using a line stage with gain, or through one of the DCB1 buffers?

I'm also building Pearl 2 (slowly) and with F-5 and B-1, am needing more gain. So just wondering about your pre situation. I am also putting together parts for my Pumpkin build, which should solve any gain problems.

My current cart. (Shure V15Vxmr) has quite a bit more gain than the Denon you are using as well, so maybe it wont be a problem.

Russellc

Last edited by Russellc; 31st December 2010 at 03:16 PM.
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Old 31st December 2010, 03:38 PM   #603
ra7 is offline ra7  United States
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You should not have any problems with the Shure V15 (3mV) and the PII. The DL103 has about 0.3mV output, 1/10th of the Shure.
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Old 31st December 2010, 04:04 PM   #604
Tea-Bag is offline Tea-Bag  United States
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Jealous you have the cart they don't make anymore. RA7 of course is correct. No issues.
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Old 31st December 2010, 04:17 PM   #605
nar is offline nar
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You should not have any problems with the Shure V15 (3mV) and the PII. The DL103 has about 0.3mV output, 1/10th of the Shure.
I currently use it with the MC3 turbo No issue, I just reduced the gain of 2nd stage, the RIAA pre gives me roughly a "CD" output level. Without the mod I would get about 4V at the output ... definitively too much

If one would intend to use Preal II with let's say a regular Planar III with an Elys cart, as this cart has very high output level gain of the 2nd stage should be reduced accordingly, not to raise the THD of the RIAA at the output. I found it very enjoyable to reduce gain in my setup. Currently in mine RFB = 50k instead of 100k. For the Elys, about 33k should be fine, 1st stage is unlikely to clip. Just keep in mind that doing so feedback is increased, so changes in sound character may occur.

Best regards,

nAr
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Old 31st December 2010, 04:24 PM   #606
ra7 is offline ra7  United States
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Any ideas on using Mouser part no. 863-MC7824ACTG as replacement for the LM7824?
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Old 31st December 2010, 04:42 PM   #607
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Any ideas on using Mouser part no. 863-MC7824ACTG as replacement for the LM7824?
No problem seen from where I am
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Old 4th January 2011, 08:17 PM   #608
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Hi Gents,

I would like to order the boards , but would also like to order the PSU board .

Can someone point me in the right direction for the appropriate board please ?

Thanks, Rich
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Old 4th January 2011, 09:04 PM   #609
ra7 is offline ra7  United States
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There is currently no PSU board for the PII. Any Firstwatt PS board would work, or even a simple CRC filter. The PII boards have additional filtering circuitry before the main circuit.

The Firstwatt PS boards are available from cviller, peter daniel and brianGT. Take your pick.
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Old 4th January 2011, 09:10 PM   #610
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Hi Gents,

I would like to order the boards , but would also like to order the PSU board .

Can someone point me in the right direction for the appropriate board please ?

Thanks, Rich
Building a Pearl 2 as well now that the Aleph is done? I have the Pearl 2 boards and matched fets, just about ready to start collecting parts. Same thing with Pumpkin preamp. Cant wait to have them done!

Russellc
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