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Parasound HCA 1000 upgrade
Parasound HCA 1000 upgrade
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Old 15th June 2017, 07:06 PM   #1
srinath is offline srinath  United States
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Default Parasound HCA 1000 upgrade

I just got one of these. I was thinking of upping those power supply caps.
There is a HCA1000 on ebay now with some big silver body caps in it.
The seller doesn't know what they replaced etc.
Could someone be able to tell me what else can be modded with bigger caps in this amp ?

Thanks.
Srinath.
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Old 15th June 2017, 09:54 PM   #2
phase is offline phase  United States
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I looked at that, and the parts that have been replaced are the ones that are best just removed.
Very nice design, built to a price point.
Probably a lot you can do here and there as far as parts go to make better smoother sound from that, as well as just for maintenance.
Main filter capacitors, local decoupling capacitors, bypasses, servo film capacitors, servo op amp, feedback resistor, diodes can be replaced for benefit, amp is fairly easy to work on.
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Old 16th June 2017, 02:18 AM   #3
srinath is offline srinath  United States
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Let me look at what the original parts that were replaced were.
Also I will see if I can replace the power supply caps to the 1000 a specs.
Thanks.
Srinath.
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Old 16th June 2017, 09:25 PM   #4
mjstriker5 is offline mjstriker5  United States
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Quote:
Originally Posted by phase View Post
I looked at that, and the parts that have been replaced are the ones that are best just removed.
Very nice design, built to a price point.
Probably a lot you can do here and there as far as parts go to make better smoother sound from that, as well as just for maintenance.
Main filter capacitors, local decoupling capacitors, bypasses, servo film capacitors, servo op amp, feedback resistor, diodes can be replaced for benefit, amp is fairly easy to work on.
I would be interested in a little more detail on your recommendations on making this amp better. I have a Parasound HCA 2205 that is going to need a recap soon. Since I am in there might as well have a little fun with it. Don't know how similar these amps are but I do know from looking at the schematic for my amp that is also fairly straight forward.
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Old 16th June 2017, 09:39 PM   #5
john curl is online now john curl  United States
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Keep it simple! Just raise the bias to as much as the amp can handle.
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