Re: [chromapolaris] Yahoo Groups Shutting Down
2019-10-20 by Ben Stuyts
Thanks Chris, that is very generous of you! I’ve been in section 10 a few times. :-) There’s good info in the mailing list archive here. Would be wonderful
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Re: [chromapolaris] Yahoo Groups Shutting Down
2019-10-20 by Wouter Veltmaat
Thank you for the offer Chris. I guess that will be the best solution since using a free hosting option would mean that if they terminate their services we d
Re: Yahoo Groups Shutting Down
2019-10-20 by T Mitchell
+1 with a bullet! I hope you ll do it. Let me know (PM) if I can help. Thanks very much for taking the initiative - or offering to think about taking it. Tom
Chroma Polaris Facebook Page
2019-10-20 by chad grisly
With the shutting down of this Yahoo Group, I d like to remind members that there is also a Chroma Polaris Facebook page. The page often directed people here,
Re: [chromapolaris] Yahoo Groups Shutting Down
2019-10-20 by Florian Anwander
Hi Chris Am 20.10.19 um 01:18 schrieb Chris Ryan chris@rhodeschroma.com ... That would be perfect! Florian Hi Chris Am 20.10.19 um 01:18 schrieb Chris Ryan
Re: [chromapolaris] Yahoo Groups Shutting Down
2019-10-19 by Chris Ryan
That’s my site. I’d be willing to host files on the site. I could probably also host the mailing list; I already have one for the Chroma
Re: [chromapolaris] Yahoo Groups Shutting Down
2019-10-19 by torontodoorman@yahoo.com
Below is a long standing group (not on yahoo) that has great Polaris resources including one of the design engineers. Rhodes Chroma · Polaris ... Rhodes
Re: [chromapolaris] Yahoo Groups Shutting Down
2019-10-19 by Ben Stuyts
Hi, Thanks for the archive! I’m moving a couple of Korg and Mellotron related groups over to groups.io . Looks like a good place. You
Re: Yahoo Groups Shutting Down
2019-10-19 by fuse@...
Managed to download most files and archived them in a single zip file. This file is shared for 7 days at: https://we.tl/t-FF75lFv9ag https://we.tl/t-FF75lFv9ag
Re: Yahoo Groups Shutting Down
2019-10-18 by fuse@...
Thank you Chris for the heads up. It was inevitable that something like this would happen. If you are quick enough you can save anything you want from this
Yahoo Groups Shutting Down
2019-10-17 by Chris Ryan
I assume this applies to the Polaris mailing list: if true, all discussions and uploaded files will be permanently removed.
RE: [chromapolaris] Sound Storage
2019-08-17 by john_daniels59@...
Yes you can use Midi Ox on the PC.
RE: [chromapolaris] Sound Storage
2019-08-16 by Lou Champagne
Sysex can be used! Coaxing the Polaris to send out may be challenging but I had no problem using Uni-Man on an Atari ST to send Sysex to my Chroma Polaris. I
Sound Storage
2019-08-15 by chadgrisly@...
Is the tape interface the only way to add or store sounds, or can it be done via midi/sysex?
Re: Pedal for the polaris
2019-07-30 by karmakater@...
in the meantime I changed the pot in the M-Audio EX-P to a 100k and adjusted the mechanical control and did a LF A8. it works quite smooth now although i don t
RE: [chromapolaris] ADC Range Adjustment
2019-07-23 by sndgroom@...
Thank you Paul, I made a few tests this morning: @ Z59 (ADC0804) I can see pulses changing while I play the keys, this should be enough to exclude a fail in
RE: [chromapolaris] ADC Range Adjustment
2019-07-23 by sndgroom@...
Many thanks Lou, it is a good idea to check those too. I sprayed some contact cleaner and moved them a bit, unfortunately in my case it didn t work
RE: [chromapolaris] ADC Range Adjustment
2019-07-23 by Paul D. DeRocco
... It s a good idea, in an old Polaris that isn t running, to reseat every connector, including partially lifting and reinserting every socketed chip. There
RE: [chromapolaris] ADC Range Adjustment
2019-07-22 by Lou Champagne
Just a thing to check. I had a similar problem and it had me stuck for months. I finally located a bad 3 pin RAM selection jumper switch on the board. It had
RE: [chromapolaris] ADC Range Adjustment
2019-07-22 by Paul D. DeRocco
... The various things you ve been seeing indicate that the CPU was running. If it had crashed, you wouldn t see any sequence of stepped voltages on the ADC or
Re: [chromapolaris] ADC Range Adjustment
2019-07-22 by sndgroom@...
Thank you Bob, I cannot read any pulse there neither, glad to know the 80186 looks easy to find and not expensive.
Re: [chromapolaris] ADC Range Adjustment
2019-07-22 by Bob Grieb
Check the reset signal and the clock signal to the CPU chip. Without those it can t work. If the CPU really is toast, you can get one on ebay. It s in a
RE: [chromapolaris] ADC Range Adjustment
2019-07-22 by sndgroom@...
I ve been waiting some time before answering and tried in the meanwhile to read as much as I could about digital circuits, to be sure I wasn t alarmed for
RE: [chromapolaris] ADC Range Adjustment
2019-07-18 by sndgroom@...
The new ADC0804 is running cool, that s good news! I ll measure around the ICs tonight and report. ... Unfortunately, I only hear the normal hum in the
RE: [chromapolaris] ADC Range Adjustment
2019-07-18 by Paul D. DeRocco
... Is the new 0804 running cool? If so, there was still something wrong with the old one, and it needed to be replaced. You should also look at pins 2, 3, and
RE: [chromapolaris] ADC Range Adjustment
2019-07-18 by sndgroom@...
Unfortunately I replaced the ADC0804, but nothing changed, there must be something else too. If I understood correctly
RE: [chromapolaris] ADC Range Adjustment
2019-07-17 by sndgroom@...
thanks for the kind explanation!
RE: [chromapolaris] ADC Range Adjustment
2019-07-16 by Paul D. DeRocco
... No, it means the multiplexers that switch the various sliders and deliver their voltages to the ADC are working, but the ADC isn t measuring those voltages
RE: [chromapolaris] ADC Range Adjustment
2019-07-16 by sndgroom@...
... With the scope, I can see the seq and how the shapes change when I move the sliders, cool! Doesn t this mean that the ADC is working good? If so, why the
RE: [chromapolaris] ADC Range Adjustment
2019-07-16 by sndgroom@...
So great having your support, thanks Paul! :) I only repaired analog devices, I m learning many new things that sure will be useful in the future. I checked
RE: [chromapolaris] ADC Range Adjustment
2019-07-15 by Paul D. DeRocco
... Probably needs to be replaced. But first make sure that Z54-1 and Z54-7 have reasonable voltages on them. The latter should be 2.5V, tweakable via the R45
RE: [chromapolaris] ADC Range Adjustment
2019-07-15 by sndgroom@...
... No, I made a total reset, but I loaded a scratch program for the setup. Done the calibration once again, but still no sound. Thanks Paul for your patience
RE: [chromapolaris] ADC Range Adjustment
2019-07-15 by sndgroom@...
Ehm...so sorry for panicking for no reason, before. Tapping now the ICs, I do not get the same affect anymore, all looks good! I think it was the probe s
RE: [chromapolaris] ADC Range Adjustment
2019-07-15 by sndgroom@...
A couple of things more I found: The ADC converter 0804 is hot! Even hotter discovery: Imagine a square occupying the space from Z29 down to the COMP SIDE text
RE: [chromapolaris] ADC Range Adjustment
2019-07-15 by Paul D. DeRocco
... Unless R46 is broken, it shouldn t have any major effect. All it does is null the op-amp offset, so that the DAC will be as linear as possible, and the
RE: [chromapolaris] ADC Range Adjustment
2019-07-15 by sndgroom@...
Yes, I can now see the pulses dancing while playing note! The setting on R46 was, I believe responsible as as soon as I moved the pot, the flow of waves
RE: [chromapolaris] ADC Range Adjustment
2019-07-14 by Paul D. DeRocco
... Yes, either side of R47 is fine. The R47Hameg pic shows various stepped waves, which is normal, assuming the scale is one or two volts per div. The
RE: [chromapolaris] ADC Range Adjustment
2019-07-14 by sndgroom@...
... Unfortunately, even moving the volume slider, I cannot read anything anywhere on the output board, :(
RE: [chromapolaris] ADC Range Adjustment
2019-07-14 by sndgroom@...
Thanks Paul, for the explanation on how to use a scope. I agree regarding the good ground, that s why I was using the two copper lids on the motherboard, that
Re: [chromapolaris] ADC Range Adjustment
2019-07-14 by Florian Anwander
Am 14.07.19 um 09:48 schrieb Paul D. DeRocco pderocco@ix.netcom.com ... Just another pitfall: I once mis-seated a connector, so there was no ground
RE: [chromapolaris] ADC Range Adjustment
2019-07-14 by Paul D. DeRocco
... You should always have a connection between the scope ground and a circuit ground near where you re trying to look. It s best if you use the clip on the
RE: [chromapolaris] ADC Range Adjustment
2019-07-14 by sndgroom@...
Thanks Paul, at Z3-1, I see some signal, but not a pure Pulse wave, it looks like mixed with noise. As explained on the previous message, the noise disappeared
Re: [chromapolaris] ADC Range Adjustment
2019-07-14 by sndgroom@...
Thanks for your reply. I made some tests with the scope yesterday night: First thing I noticed is that rubbing with the scope s negative crocodile the main
RE: [chromapolaris] ADC Range Adjustment
2019-07-14 by Paul D. DeRocco
... If it s really that loud, then you should be able to see it on the output board, on Z3-1. If you see it there, check the MAIN OUT and DATA AUD inputs to
Re: [chromapolaris] ADC Range Adjustment
2019-07-13 by Florian Anwander
Thanks for the video. We hear the digitalsound all the time. This means, either some digital signal is influencing the outputsignal all the time. This means,
Re: [chromapolaris] ADC Range Adjustment
2019-07-13 by sndgroom@...
Thank you for your interest!
RE: [chromapolaris] ADC Range Adjustment
2019-07-13 by sndgroom@...
https://youtu.be/zI1MFh6nINc https://youtu.be/zI1MFh6nINc Yes, it seems strange such a dramatic change only by moving a bit a few chips. I double checked and
RE: [chromapolaris] ADC Range Adjustment
2019-07-12 by Paul D. DeRocco
... Could be helpful. Something that bad sounds like more than a bad chip, like a bad ground connection or bad power supply. -- Ciao, Paul D.
Re: [chromapolaris] ADC Range Adjustment
2019-07-12 by Florian Anwander
... Yes. Do so!
RE: [chromapolaris] ADC Range Adjustment
2019-07-12 by sndgroom@...
The previous term I used to describe the sound I get, fits pretty well: sawchain Imagine a very loud 90s modem, the sound when connecting to internet in those