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Old 24th June 2010, 04:49 AM   #11
jencelo is offline jencelo  United States
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Tiff_Needle,

Any update?
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Old 25th June 2010, 03:00 AM   #12
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Join Date: Feb 2009
Default IcePower ASP1000 - Tweeking/Mods/Upgrades

Tiff Needle,

Looks like the binding posts on the Krell amp are Mundorfs.

For mods, I would try to get some Rubycon caps in the smaller size, and maybe Mundorfs or BHAs for the big caps. For resistors, the Shinkoas would give a little more harmonic body, and the Kiwamis more vividness. Probably best to put a couple of each in.

Not much room for PS bypass caps, but Mundorf, Jensen and Modwright caps are all very good when used as bypass caps.

The Partsconnexion in Canada is a good source of upgrade information. They sell parts and do many modifications.
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Old 8th April 2011, 11:34 AM   #13
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Quote:
Originally Posted by Tiff_Needle View Post

Bu the way, this OPS Front end uses on JRDG PC-1 as an output of 385VDC, so does the other option that I've found, but isn't 385V above the limit setting of overvoltage protection of the ASP 1000 ?

What are your opinions on using a AC-DC FrontEnd with PFC like this one on the link below?

http://www.martekpower.com/files/pdf/PFC1000__363.pdf

or

http://www.powerstaxplc.com/products...00w-pfc-ac-dc/

Any help?

Cheers,
Well it's been quite a while since Ive had any time to plunge into this micro project...

I would like you opinions on the matter.

Could you be kind enough and see the PFC's data sheet and verify the compatibly between the PowerStaxPLC PFC Module and the ASP1000?

Any propositions for a voltage buffer for the input using FET's, for a balanced application?

I've been searching for the Sjøberg, Borbely, Pass circuits for a balanced configuration but so far haven't been able to find so...

I was recommended to take a look at them.

Would you recommended to add a 1:1 transformer (Lundahl 7902 input transformer) after the input buffer to improve the sub-zone (get rid of DC and HF)?

Increase the capacitor reservoir? With which capacitors? How many mF?

Cheers,

Tiff
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Old 9th April 2011, 06:32 PM   #14
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for cloning the jrdg input stage use L4 R2 config in 7902 datasheet , from R2o/p apply the "Optimum termination for best squarewave
response' the bal signal then feed into an instrumentation amp, consist of an opa2134 and 3 resistors .the opamp is supplied with +-15v ,by pass 100n ceramic smd cap.............................
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Old 9th April 2011, 10:44 PM   #15
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Quote:
Originally Posted by arthur View Post
for cloning the jrdg input stage use L4 R2 config in 7902 datasheet , from R2o/p apply the "Optimum termination for best squarewave
response' the bal signal then feed into an instrumentation amp, consist of an opa2134 and 3 resistors .the opamp is supplied with +-15v ,by pass 100n ceramic smd cap.............................
Wow!

Ok... let me digest that.

I'll send you a PM for details.

Thanks
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Old 4th June 2011, 03:35 PM   #16
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see 501 input in attached
Attached Images
File Type: jpg IMG_0707111.JPG (684.5 KB, 1292 views)

Last edited by arthur; 4th June 2011 at 03:43 PM.
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Old 19th June 2011, 05:06 PM   #17
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Default Dc into ac

Quote:
Originally Posted by mbl View Post
Is icepower 1000ASP or 500ASP accept 385V DC?

If I used AC to DC 385V PFC, is it directly plug it into icepower AC input? Any problem?
I am very curious about this also. Any advice?
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Old 20th June 2011, 02:57 AM   #18
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yes
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Old 20th June 2011, 05:22 AM   #19
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Quote:
Originally Posted by arthur View Post
yes
Please clarify on 'yes' . 'YES', there will be a problem if I use 385V DC into the 240V AC power input into the Icepower module, or, 'YES', i can do that without issues.

i looked at the ICEpower specs, and they only specified AC.
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Old 20th June 2011, 06:54 PM   #20
ddeacon is offline ddeacon  United States
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Default ICEpower Parts Available

Hello All,

I have several items that might interest some participants in this thread.

1) Icepower 1000 and 500ASP modules
2) Chassis and faceplates witk XLR, RCA, IEC and trigger cutouts from 1-7 channels. They will accept 1000, 500 and 250ASP modules
3) Lundahl 7902 PCBs and transformers, assembled or separate
4) Input buffer PCBs, raises impedence to 500K ohms
5) All necessary wire harnesses and connectors to assemble the complete, operational amplifier.

Please contact me for photos and prices.

Regards,

Dennis
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