Arcam Delta 170 + Blackbox

[tubenut]

Hi Fin, sent you a PM.

I think your 70.2 is lekkerder than the 70.3 bitterstream machine. Multibit is still the sound for me and the 1541 is nice.

G

[Fin]

I'll send the manual tomorrow - it's on my work computer.......

The 70.3 is also baie lekker. Had a chance to listen to one a while ago - but the price was too high. Then the 70.2 came along at half the price.

The 70.2 and 70.3 are both nice...and I would lke to have both.

[Fin]

You've got mail.......

[Fin]

Hi Tubenut

Since I sent the manual, I don't seem to be able to send you any more emails. I am receiving yours...but mine are being returned.

It's probably better to continue here anyway so that some others might join in.

So - If it's OK with you, I'll add the content of the emails to this conversation.........

[Fin]

Originally posted by tubenut
Hi Fin

Cool, thank you!!!!!

I can not see anything to obvious to do to it. No output caps to replace Opamps
I think are not bad, soft recovery diodes are there, more attention then most
to the clock....

I wonder if the CDM4/19 clamp with ball bearing is better then this one with
plastic stub?

Hi Just realised, not OPA627 but LM627, quite a difference.
Have you rolled op amps yet in yours?
The fact that bitstream and Multibit are so tonally different probably means you would prefer something else anyway.

I quite like OPA604 as it is generally musical and works well as quick drop ins almost anywhere and is not to dear but I have not tried anything in the Arcam yet.

G

Hi

Mine still has the original NE5534(Signetics) opamps but I've got some OPA627s waiting to go in. However, I'd still like to test this in my CD60 to make sure I like them - before I do any unnecessary desoldering in the Arcam.

The clock can be much better. There is one multiple flip flop shared for all lines....including dig out. The ideal situation is to have a clock with multiple outputs - each clocking one flip-flop for each line.

If you don't use the digital out, disconnect it and disable its portion of the multiple flip-flop.

If you are willing to add an external clock like Guido Tent's XO2.....you can use the space from the existing clock to provide the ultimate in reclocking.

Not sure about the CDM4/19 ball bearing thing. All of my CDM4/19 have the same clamp as the arcam....with the spindle thing.

[tubenut]

I now have D170 and a D70.3 to mess with.

I have modded the digital out scheme on the D70.3, i cut the legs responsible against the chip and removed them out of the pcb. Then stacked another 74HCU04 or whatever it was on top with the digital out legs extended with leads. All the other legs except +V and Gnd get trimmed off too. Connect ecxtended leads into dig out holes and solder PSU pins to the chip below. Not perfect but all still functions and the analogue out sound is quite a lot better now, in fact quite radical.

The CDM4/11 and 4/19 ball bearing clamps are slightly different width so hard to exchange without filing and and and.


The D170 uses CDM1MKII, so the fellow who has the 70.2 and 170, I would transplant that nice metal mech in to the player I would use most.

I read somewhere else that the according to Joco the Delta 170 transport had a lot of extra unecessary things done its digital output board. Optical decoupleing and various flip flops etc and many shared gate chips.

First I fitted a new clock, big improvement. Then i removed the whole output board and replaced it with a module that came out of an old defunct Theta Data laser disc transport, it reclocks/PLLs the digital out.This has transformned this machine in to a very capable transport. As standard it is fair.

[thebergerac]

Hi

I am new to the forum and new to the mods concept. After reading tons of post I have realized that I could give it a try. My old BB5 hybrid DAC would go first. I do not have service manual so it hard to work on it, if someone could share it with me that would be great.

I can see on BB5 1 PCB old PCM67P 1bit/18bit dac, glue logic PC74HC/86P/74P/00P/U04P chips, voltage regulator LM340T/317T, caps are electrolytes Rubycons 16V/25V/10V and Black Gates F 10V, polypropylene Evox PFR 63V rated, bunch of diodes, output opamps are NE5532N. PS board sports the same quality/make parts. This is quite nice assy btw.

Is there anything worthy to do with it or should I just buy this interesting DIY board
http://www.lampizator.eu/LAMPIZATOR/...ampizator.html
or any other you may recommend. I am using it with DAT tape recorder so is it 24/192 or not it is not critical really however why not...

Andrew

[thebergerac]

Originally posted by thebergerac
Hi

I am new to the forum and new to the mods concept. After reading tons of post I have realized that I could give it a try. My old BB5 hybrid DAC would go first. I do not have service manual so it hard to work on it, if someone could share it with me that would be great.

I can see on BB5 1 PCB old PCM67P 1bit/18bit dac, glue logic PC74HC/86P/74P/00P/U04P chips, voltage regulator LM340T/317T, caps are electrolytes Rubycons 16V/25V/10V and Black Gates F 10V, polypropylene Evox PFR 63V rated, bunch of diodes, output opamps are NE5532N. PS board sports the same quality/make parts. This is quite nice assy btw.

Is there anything worthy to do with it or should I just buy this interesting DIY board
http://www.lampizator.eu/LAMPIZATOR/...ampizator.html
or any other you may recommend. I am using it with DAT tape recorder so is it 24/192 or not it is not critical really however why not...

Andrew

This is DELTA Black Box 5