Ron's 400, Previously Owned by Some Guy in New Hampshire

roccus said:
Might be able to help you out on the cover I have a 4 fin amp coming in paid for it 4 days ago but he still has not shipped it yet but I can let you know when it gets here...
Click to expand...

That would be great! Let me know.

Thanks
 
There is a set of 3 on the bay for the 400, pretty cheap when compared to the time used for fabbing up some.
 
I ordered a kit from him last week he sent me an email a few days ago saying it will be a couple weeks before he can ship it out

laatsch55 said:
He can be gone for a week or two at a time.....
Click to expand...
 
That's why I buy 10 of each at a time. Bare boards only, then Mouser the components.......
 
I've still got his box of 400 and 700 DCP's sitting here. I tried to contact him also with no luck. Hmmmmmm
 
So back to this thing...

I basically took it apart, cleaned it inside and out, replaced some missing hardware, replaced the mangled heat sinks, cleaned the outputs and installed sil pads, touched up a couple suspect solder joints and put her back together for testing.

I do still plan to install a DCP and new bulk caps.

Anyway, I fired it up this evening for the 1st time. Today's question concerns dc offset. At startup, the left channel had over 75 mV and the right only had around 5 mV. After running idle for 10-15 minutes, the left side has gone down to around 15 mV. So is this anything to be concerned about?

Also, I wanted to check the bias. This has 4 adjustment pots (early style board). Anybody care to enlighten me on the procedure on this board?

Dan
 
20160917_181137.jpg20160917_181058.jpg

So I took a few liberties with the hardware. The bolts are chrome since the originals were long gone. I disn't care for the knobs so I used these that were from a guitar pedal I think. Faceplate cleaned up nice, but I left the stock number sticker on the upper left corner.
 
Danimal1969 said:
So back to this thing...

I basically took it apart, cleaned it inside and out, replaced some missing hardware, replaced the mangled heat sinks, cleaned the outputs and installed sil pads, touched up a couple suspect solder joints and put her back together for testing.

I do still plan to install a DCP and new bulk caps.

Anyway, I fired it up this evening for the 1st time. Today's question concerns dc offset. At startup, the left channel had over 75 mV and the right only had around 5 mV. After running idle for 10-15 minutes, the left side has gone down to around 15 mV. So is this anything to be concerned about?

Also, I wanted to check the bias. This has 4 adjustment pots (early style board). Anybody care to enlighten me on the procedure on this board?

Dan
Click to expand...

Need a pic of the board....
 
You must log in or register to reply here.
Back
Top