Crown D-75 amp questions

[tiefbassuebertr]

hope it helps
MEGAUPLOAD - The leading online storage and file delivery service

Yes - thank you very much. How you have discover this portal?

There is some early stuff not on their website. Email David Glass (DGlass@crownintl.com) if you can't find it. Also ask for any subsequent tech notes for the equipment you're working on. Often the tech notes will address the problem you're having. Normally you have to be a service center to get to the tech notes online.
Note: David is not a heavy duty technical guy but is more of a customer service engineer.

Except the "SA 20-20" I have now all schematics here asked. Thus I will ask David Glass about this first solid state amp model from Crown.
Thank you for his email address.

 

[alan brando]

.....you're welcome, no problems. Once I was searching a topic in the net and the links drove me to this portal.

 

[tiefbassuebertr]

.....you're welcome, no problems. Once I was searching a topic in the net and the links drove me to this portal.

if you want and it's not so complicated for you, you can try to find out more informations of world's first solid state amplifier - Cervin Vega's ER-123 - go to post #10 about
http://www.diyaudio.com/forums/soli...id-state-audio-amplifier-components-want.html
and post #1 about
http://www.diyaudio.com/forums/solid-state/171619-first-solid-state-amp-cerwin-vega-not.html
I haven't this amp for repair service and thus this it's not really urgent.
So you can do this if you really have time - thank you.

 

[dirkwright]

I just bought a couple of D-75A's and plan to do some upgrades. What have other folks done? I'm planning on upsizing the power supply cap's, replacing the IC's, and replacing the electrolytics in the signal path.

 

[dirkwright]

How important is it that the input capacitor C201 in this schematic is a non-polar type? If it has to be one of those, can someone recommend a high quality brand that I could use? I can only find ordinary Panasonic one:
Digi-Key - P1281-ND (Manufacturer - ECE-A1HN220U)

 

[don dada]

Hi, I found the reference it's a NE2H neon pilot light with 27k Ω dropping resistor

see it there: Crown D-75 Review

Hope it helps anyone looking for this