Re: [PolySix] Re: The Post I didn't want to make....
2016-02-08 by Bob Grieb
Some products send around a higher voltage, like 9VDC or maybe 12VDC, and each board has its own regulator to create 5V from the higher voltage. But that s a
Messages
Browse messages
Page 16 of 114 · 5658 messages matched
Re: The Post I didn't want to make....
2016-02-08 by jw_dewdney@yahoo.com
okay thanks - yes that sure makes sense - and yes I even tried firing it up without the ground wire connected once (just to see) but no difference. But yeah
Re: [PolySix] Re: C22
2016-02-08 by jw_dewdney@yahoo.com
cool... thanks bob. I ll check it out
Re: [PolySix] Re: The Post I didn't want to make....
2016-02-08 by Bob Grieb
If the front panel board has power, the latches that control the LED s may simply come up in the state that would light the LED. Normally the CPU would turn
Re: [PolySix] Re: C22
2016-02-08 by Bob Grieb
There are a number of different oscillator types. I believe the std MCU one is called a Pierce oscillator. If you really want to learn more about it, here
Re: The Post I didn't want to make....
2016-02-08 by jw_dewdney@yahoo.com
but still... lighting everything up on the top of the polysix - no voices - and the bad voltages on the 367 board make me think something along the lines of
Re: C22
2016-02-08 by jw_dewdney@yahoo.com
wonder what happens if you sub in a 22pf (?) surely each leg of the resonator needs to see a different capacitance for a reason? perhaps to get it going in the
C22
2016-02-08 by Bob Grieb
I added a small wire to connect the Gnd end of C22, and the PolySix still works fine. Better to have the cap connected. Bob
Re: [PolySix] Jorgensen KLM367 Bug Alert - C22
2016-02-07 by jw_dewdney@yahoo.com
thanks - well it happened when i was scavenging a 10pf cap from C22 in one of my old boards to transplant into C23 on the new one (per recommendation) - but
Re: [PolySix] Jorgensen KLM367 Bug Alert - C22
2016-02-07 by <backshall1@bellsouth.net>
That is an awesome find. After all these years working with the clone boards and problems with C22, nobody noticed that C22 is missing a trace. Are you
Re: [PolySix] Jorgensen KLM367 Bug Alert - C22
2016-02-07 by Bob Grieb
I just checked my board. The gnd end of C22 does not connect to gnd. Good job finding that! But my P6 works OK as is. Do I dare fix it... Bob ... On Sun,
Jorgensen KLM367 Bug Alert - C22
2016-02-07 by jw_dewdney@yahoo.com
I m not sure about the boards you guys got - but in MINE (there don t seem to be revision numbers) C22 isn t even in the circuit. In the original, C22 hits the
Re: The Post I didn't want to make....
2016-02-07 by jw_dewdney@yahoo.com
I just checked the test points on the 367 board. Looks like I m only getting juice on TP4.... so I guess there are deeper issues to resolve. The power supply
Re: polysix still no sound
2016-02-07 by jw_dewdney@yahoo.com
mpe19696 - can i ask what you meant by less lit up (as each patch loaded)? I am only asking because - after having hooked up my replacement KLM367 board,
Re: [PolySix] Re: The Post I didn't want to make....
2016-02-07 by Bob Grieb
Do not short reset to ground, since there is an op amp output driving it. You could damage that. Just check it with a scope (or a meter if you don t have
Re: The Post I didn't want to make....
2016-02-07 by jw_dewdney@yahoo.com
Okay thanks sorry I was being a bit sloppy with my language i guess. But what sort of signal is the reset pin expecting to see? That s all i m asking... should
Re: [PolySix] Re: The Post I didn't want to make....
2016-02-07 by Bob Grieb
Hi, Let s not mix reset with interrupt, OK? RESETb on the 8048 is an active low signal that puts the CPU in a known condition, ready to start executing code
Re: Project PolySix
2016-02-07 by jw_dewdney@yahoo.com
thanks Florian - that s great. The greyscale scanned one especially.
Re: KLM367 STANDOFFS - WTF?
2016-02-07 by jw_dewdney@yahoo.com
for Bob Grieb: ended up using the old standoffs - even though they were brittle. a few of the legs inside snapped during extraction from the old board but
Re: POLYSIX SRAM CHIP REPLACEMENT?
2016-02-07 by jw_dewdney@yahoo.com
ohhhh.... well thats quite interesting info and useful... thanks you... although in october and september of last year here in southern california it was
Re: [PolySix] Re: The Post I didn't want to make....
2016-02-07 by jw_dewdney@yahoo.com
thanks for the suggestions Bob! no... i used the 22pf cap on the materials list... i came across the post about the 10pf replacement just yesterday in fact.
Re: [PolySix] Re: The Post I didn't want to make....
2016-02-07 by <backshall1@bellsouth.net>
Did you use 22pF and 10pF for C23 and C22 near the 6 MHZ ceramic resonator? Many people have found that the new boards are very unstable with these values, and
Re: [PolySix] Re: The Post I didn't want to make....
2016-02-07 by Bob Grieb
Check the reset input to the CPU, and the oscillator waveform. Also, there is a test pt on the side of the CPU towards the effects bd that I think should have
Re: [PolySix] Re: The Post I didn't want to make....
2016-02-07 by Bob Grieb
You should be able to go into Manual mode and see if the board is working. Then you are using the front panel controls. I replaced my KLM-367 with the new pcb.
Re: POLYSIX SRAM CHIP REPLACEMENT?
2016-02-07 by tlule@gmx.de
Please allow me throw in a few more words. Reading the datasheet carefully you will find that the currents so far discussed are maximum currents - maximum in
Re: The Post I didn't want to make....
2016-02-07 by jw_dewdney@yahoo.com
or is this fairly normal behaviour before one has any patches loaded in perhaps....?
The Post I didn't want to make....
2016-02-07 by jw_dewdney@yahoo.com
Well I got the Jorgensen KLM 367 transplanted back into the P6 and thought I d try to take it on a test run. I even went so far as to get all the VR pots back
KLM367 STANDOFFS - WTF?
2016-02-07 by jw_dewdney@yahoo.com
hey- to any who have done the jorgensen KLM367 board... last thing I have to do on this is fit the standoffs - but the standoffs specifed in the materials list
Re: POLYSIX SRAM CHIP REPLACEMENT?
2016-02-06 by jw_dewdney@yahoo.com
thanks for the additonal info Bob and Klosmon. I ll take it under advisement... I just bought 16 of the APL3s however... the litihium button cell i m using is
Re: [PolySix] Re: POLYSIX SRAM CHIP REPLACEMENT?
2016-02-06 by klosmon
For what it s worth, I ve successfully used 6514 RAM chips on the P6. Widely available. ~G On 2/6/2016 12:32 PM, jw_dewdney@yahoo.com [PolySix] wrote:
Re: [PolySix] Re: POLYSIX SRAM CHIP REPLACEMENT?
2016-02-06 by Bob Grieb
I uploaded the data sheet into the files section. I misspoke about the standby current. The L part is 0.2 uA versus 20 uA for the non L part. You can still
Re: POLYSIX SRAM CHIP REPLACEMENT?
2016-02-06 by jw_dewdney@yahoo.com
and yes... sorry... i made an omission... nearly everything on my KLM367 board is socketed - except for the RC45558N chips
Re: POLYSIX SRAM CHIP REPLACEMENT?
2016-02-06 by jw_dewdney@yahoo.com
Thanks Bob - no that s QUITE a convincing argument/explanation... I ll get the APLs instead... anyone had any experience with cooking their SRAM chips?? or are
New file uploaded to PolySix
2016-02-06 by PolySix@yahoogroups.com
Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the PolySix group. File : /Mods &
Re: [PolySix] POLYSIX SRAM CHIP REPLACEMENT?
2016-02-06 by Bob Grieb
I found the data sheet. I don t think I can attach it here. The difference is the standby current. The L part is less than 2 uA. The non-part is less than
POLYSIX SRAM CHIP REPLACEMENT?
2016-02-06 by jw_dewdney@yahoo.com
Hi - I m just putting the finishing touches on one of Jed s 367 boards - and in my efforts to remove the TC5514 chip with solder wick - i m a bit worried I ve
Re: [PolySix] Poly Mode Issue
2016-01-17 by Florian Anwander
... Others may do, but I can t give any comment unless I have heard what you are trying to describe. Could you post an audio example. Please play 12 times the
Re: Poly Mode Issue
2016-01-17 by synthmans@gmail.com
Sounds like the typical battery leakage syndrome... the leaked electrolyte shorts out various functions, takes out vias and even traces which messes up the
Re: [PolySix] Poly Mode Issue
2016-01-17 by simon
check your ground connections at the power pcb. ... -- Met vriendelijke Groet, Simon Claessen drukknop.nl
Poly Mode Issue
2016-01-17 by l3en0it@yahoo.com
Every note I play whether it be C1 or C4 plays the same noise in poly mode(and its a high pitched ringing noise at that). Any thoughts? All input is greatly
Re: KLM 376A LFO is HFO
2016-01-05 by hblomman@yahoo.com
Problem solved! R15 is resistance-net of 5 10kohm resistors. Somehow I received a 3x10 in pairs resistance-net! Took the original out of the board and now it
Re: Polysix Overdrive Mod
2016-01-01 by chipaudette@yahoo.com
I designed my PCB for my OTA Overdrive mod. If you re interested, you can see a summary of my PCB design process (I used Fritzing for the first time) here:
Re: KLM 376A LFO is HFO
2015-12-30 by hblomman@yahoo.com
Today I also disovered that the PWM modulation signal is affected, this is in the range of 800kHz, where it should be 20hHz.
Re: Polysix Overdrive Mod
2015-12-30 by tlule@gmx.de
Hi Chip, Great stuff to add this overdrive possibility. In the mean time I have advanced on cloning the entire KLM-368 board. I am now cleaning up design rule
Re: Polysix Full Clone
2015-12-30 by tlule@gmx.de
Hi Arp, I had seen your post, that your re also working on cloning on some of the boards. I want to keep you updated, on my work in parallel. As said I ve
Re: [PolySix] Re: Polysix Overdrive Mod
2015-12-29 by simon
Remember, the Arduino is not the board, but the IDE and libraries behind it. There are a ton of chips you can use as a Arduino, from a Attiny45 up to a
Re: Polysix Overdrive Mod
2015-12-28 by chipaudette@yahoo.com
In my hacking together of my Arduino-controlled OTA Overdrive mod, you may have noticed how messy it was. Tons of wires everywhere! I m thinking that, to
Re: [PolySix] Re: Polysix Full Clone [1 Attachment]
2015-12-27 by tlule@gmx.de
Here the link to the download for the KEIL Development environment. https://www.keil.com/demo/eval/c51.htm https://www.keil.com/demo/eval/c51.htm Object code
Re: [PolySix] Re: Polysix Full Clone [1 Attachment]
2015-12-27 by tlule@gmx.de
Hi Grant, No problem. I attach the adapter schematic as PDF. However I can only recommend to also install the soft, very intuitive to use, and you can use it
Re: [PolySix] Re: Polysix Full Clone
2015-12-27 by Johannes
Hi all, Merry Christmas! Yes, the 8051 is a superset of the 8048. As far as I remember only the 8048 user flags are different and had to be emulated with the