Crown/Amcron DC-300 Serie II clone

[Jan Dupont]

Would anyone be interested in pcb's of the Crown/Amcrown DC-300 Series clone using modern components ??

I personally have two original of these, and just think that they are great

Let me know

 

[MikeW]

Which schematic?

 

[Jan Dupont]

I'll scan the schematic on day soon, and post it here

 

[rlg_200]

well let me know,

 

[Jan Dupont]

Low quality schem from the pdf-file
I will post a better one soon

 

[krmaudio]

dc300a mkII mainboards.....

Hello,

I would be interested in the later dc300a mkII mainboard.

crown p/n Q42532-4. (three ic mainboard)

what do you think????

regards

karl

 

[Jan Dupont]

That's the board mine have, and which I intend to clone

However interest for this seems very low

 

[krmaudio]

Sounds good, are you going to exactly copy the pcb layout?

I have been looking into this and i think the later boards are slightly wider and cover the area where the mains switch fits on the earlier models.........

Have you any pics of the later main board, i have been in dozens of dc300a's but never seen a late late board!

we have a few local crown users in my area, probably the worlds largest crown dc300a to human ratio in the world!

(not sure if that is a good thing or not!)

thank you

 

[Jan Dupont]

As earlier stated, the clone should use newer components, however the actual size and holes for fitting the pcb will be as on the original......

You are right about the wider side. The latest models has both the volume controls to the right, and the on/off switch all to the left.

 

[Ramandi]

PCB´s

PLease let em know the way to get the PCB´s for the Crown, also the Krell and Lynx shown at your web site. (trade and/or Buy)

Regards from Mexico, Cy

Ramon Amandi

 

[Jan Dupont]

I will post here if/when the clone board are made

 

[henrika]

Hi Jan, did you make these boards and how much would you think the total costs is?

 

[engel dela pena]

http://www.crownaudio.com/pdf/legacy/DC300AIIServiceManual.pdf
sir Jan
is this the one your talking about?

 

[Jan Dupont]

That's the one
Never cloned it as there was not much interest from others......

 

[engel dela pena]

maybe they are all feared about finding the old "verry old" parts,
is it possible to replace them of modern parts?
and what about changes in the board lay out upon mpdern parts replacement?

 

[engel dela pena]

modern parts

 

[engel dela pena]

old parts
ua739
2n3859a
2n4250a
mpsa93
nsd128
d40p3
2n4929

 

[Jan Dupont]

maybe they are all feared about finding the old "verry old" parts,
is it possible to replace them of modern parts?
and what about changes in the board lay out upon mpdern parts replacement?

This should use new er modern parts, with specs close to the originals. Besides the DC300II is known for its stabillity. I know of several who have made repairs with "at hand" components with no problems....

PCB layout and size would match the original, so new PCBs could be fitted in the original chassis if wanted.

 

[Luke]

Jan, your talking yourself into this project

 

[powerflux]

hi, very interested. got a DC300A II i can't get running. tried almost everything but it just won't work.

if you've got a _working_ copy with modern transistors (i've got everything original except for the D40P3's, NSD128 and 2n4929, for wich i've used MJE340/350's) you'd make me very happy.