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loss1234
Joined: Jul 24, 2007
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fonik
Joined: Jun 07, 2006
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 Posted: Tue Oct 23, 2007 10:40 pm Post subject:
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| loss1234 wrote: | | are these chips available anywhere? i might be interested in a pcb if i thought i could source a chip. |
i twice bought a tube at ebay for 5.- each IC...
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ktronik
Joined: Oct 22, 2007
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Location: Australia
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| Posted: Tue Oct 23, 2007 11:46 pm Post subject:
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I just got mine from flea-bay, other dudes on this forum said that the are the real thing from 'hong kong super seller'... I guess I will find out, if they turn up...
best
Ktronik |
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fonik
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| Posted: Tue Oct 23, 2007 11:58 pm Post subject:
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once i bought 25 from HKSS. they all were fine and obviously unused old stock...
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EdisonRex
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| Posted: Wed Oct 24, 2007 12:54 am Post subject:
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| fonik wrote: | | once i bought 25 from HKSS. they all were fine and obviously unused old stock... |
yeah I have some from him as well, same batch I think, 8730 is the date code. NOS for sure. They work.
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elektro80
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| Posted: Wed Oct 24, 2007 2:20 am Post subject:
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| EdisonRex wrote: | | fonik wrote: | | once i bought 25 from HKSS. they all were fine and obviously unused old stock... |
yeah I have some from him as well, same batch I think, 8730 is the date code. NOS for sure. They work. |
I bought mine from him as well. No probs at all.
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ktronik
Joined: Oct 22, 2007
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Location: Australia
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| Posted: Wed Oct 24, 2007 2:30 am Post subject:
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 Thanks guys!!
once I get the PCB, will do some more reading on the different mods people are doing for their own taste...
K |
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fonik
Joined: Jun 07, 2006
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| Posted: Wed Oct 24, 2007 2:52 am Post subject:
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| ktronik wrote: | Thanks guys!!
once I get the PCB, will do some more reading on the different mods people are doing for their own taste...
K |
K, the PCBs are on their way around the world...
i wired the cutoff potentiometer as described above and according to the alternate wiring shown on the documentations schematic.
R23 is now 75k.
if i find some time i will try to build a standalone unit with simple LFO and driven by two 9V cellls... i have the same plan for the PS3100, but there is so much tot do!
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ktronik
Joined: Oct 22, 2007
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Location: Australia
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| Posted: Wed Oct 31, 2007 3:16 am Post subject:
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Hey Fonik,
got the PCB's today...wow very nice...well done...
...waiting for the IC's....from HK
pic's, when I am done... planning to 'tac' this on the end of my midibox sid & control from that...as its a stereo SID, I will have SSM2044 VCF on each channel... see how I go...
thanks again
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EdisonRex
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| Posted: Mon Nov 12, 2007 1:11 pm Post subject:
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I finally did the two mods to make the filter work right (R23, and tying the Fc pot through a 47k to -V) - this completely changes the filter, it makes it really work well. I have to make this mod to the rest of the boards now, but it's fairly simple.
If you haven't made these mods, you should. 
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fonik
Joined: Jun 07, 2006
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| Posted: Mon Nov 12, 2007 2:58 pm Post subject:
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i am glad it worked out well for you this way. i built two of them for myself and one still waits to be tweaked.
BTW there are still some PCBs left for sale...
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EdisonRex
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| Posted: Mon Nov 12, 2007 3:03 pm Post subject:
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The response of the filter with the tweak now reminds me of my PolySix's filter. I should record some samples of it versus the multimode on the M5N, and the transistor ladder. The 2044 is such a rich filter.
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Nosferatu
Joined: Jul 27, 2007
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elektro80
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| Posted: Fri Nov 16, 2007 6:09 pm Post subject:
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I bought 50 from those guys. All were unused old stock.
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Nosferatu
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| Posted: Fri Nov 16, 2007 6:17 pm Post subject:
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The Hk mafia or Chipforbrains people?
Hmmm, qoute: 
..to resell to the 'stupid foreigners' their own trash!... |
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fonik
Joined: Jun 07, 2006
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| Posted: Sat Nov 17, 2007 7:25 am Post subject:
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there was again a discussion about HKSS in the synth-diy list these days, and there have been discussions before. i never ever heard of an bad SSM2044 from HKSS. he once sold obviously wrong labeled BBDs, though.
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EdisonRex
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| Posted: Sat Nov 17, 2007 3:09 pm Post subject:
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The ones I got all work fine. They are all identical date codes. It looks like he got ahold of a fairly large lot of NOS.
As with any large seller, I'd expect you're taking your chances with some of the rarer chips. But for these, I am quite happy.
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Nosferatu
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| Posted: Sat Nov 17, 2007 6:08 pm Post subject:
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| EdisonRex wrote: |
The ones I got all work fine. They are all identical date codes. It looks like he got ahold of a fairly large lot of NOS.
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Seams that you didn't read what CY had to say in the message in the link? |
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EdisonRex
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| Posted: Sat Nov 17, 2007 6:27 pm Post subject:
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| Nosferatu wrote: | | EdisonRex wrote: |
The ones I got all work fine. They are all identical date codes. It looks like he got ahold of a fairly large lot of NOS.
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Seams that you didn't read what CY had to say in the message in the link? |
Mine work. I read what he said. I learned not to believe everything someone tells me on the Intarweb.
What you maybe do not know is that HKSS has had someone else playing Joe Job on him, from further inside China, selling less reputable parts. This seems to be a regular occurrence, and also seems to keep being reported sporadically, in any case, there is more to the story than is being reported on the list, as is usual.
Oh and edit. That was a year and a half ago. Internet years work faster.
I read that before, come to think of it.
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loss1234
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EdisonRex
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| Posted: Mon Nov 26, 2007 4:36 pm Post subject:
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| loss1234 wrote: | is the mod for this in the documentation?
or is it just:
I finally did the two mods to make the filter work right (R23, and tying the Fc pot through a 47k to -V) - this completely changes the filter, it makes it really work well. I have to make this mod to the rest of the boards now, but it's fairly simple.
cant wait to start tonight!!! |
Look at the schematic. This is so simple I'm going to do it from my head.
Look at the Fc pot, and how it is tied to ground on one side. This limits the Fc a LOT. Take the ground side to the pot off, get a 47k resistor and then tie that to -V. There's your first mod to the board. Fc will now course from below fundamental to Way On High. It's a major mod. R23 turns into a 75k. You can do this by soldering another resistor in parallel, but I can't resist making you do the math, you need the practice.
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loss1234
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EdisonRex
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| Posted: Tue Nov 27, 2007 1:05 am Post subject:
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| loss1234 wrote: | yeah you know how bad i am at math!
i actually bought this book last week, intro to basic electronics, by wolfgang something,....its a ham radio book and its got alot of intro to math stuff....
of course, sadly lately every time i sit down to read it, i snooze..... |
that's because it's too much math. Go slower.
Series Resistance: Rs = (R1 + R2 + Rn)
Parallel Resistance: Rp = (1 / (1/R1) + (1/R2) + (1/Rn))
Grab a calculator.
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fonik
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loss1234
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