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

[Danimal1969]

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...

That would be great! Let me know.

Thanks

 

[OneTonScoutII]

worst case the output covers seem like they would be easy to make.

 

[WOPL Sniffer]

There is a set of 3 on the bay for the 400, pretty cheap when compared to the time used for fabbing up some.

 

[OneTonScoutII]

There is a set of 3 on the bay for the 400, pretty cheap when compared to the time used for fabbing up some.

Those are for an 8 fin

 

[WOPL Sniffer]

So glue some more fins on.....

 

[OneTonScoutII]

So glue some more fins on.....

that's good thinking! elmers glue should do it right?

 

[WOPL Sniffer]

JB Weld, you silly goose......

 

[Danimal1969]

Does anybody have a DCP kit for a 400 available?

 

[laatsch55]

No word from Don??

 

[Danimal1969]

No word from Don??

I emailed him a while ago and hadn't heard back. I read on another thread he was away? I'll send him another message.

 

[laatsch55]

He can be gone for a week or two at a time.....

 

[roccus]

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

He can be gone for a week or two at a time.....

 

[laatsch55]

That's why I buy 10 of each at a time. Bare boards only, then Mouser the components.......

 

[WOPL Sniffer]

I've still got his box of 400 and 700 DCP's sitting here. I tried to contact him also with no luck. Hmmmmmm

 

[roccus]

Well I hope he comes back.. he's got my money! lol

I've still got his box of 400 and 700 DCP's sitting here. I tried to contact him also with no luck. Hmmmmmm

 

[Danimal1969]

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

 

[Danimal1969]

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.

 

[laatsch55]

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

Need a pic of the board....