Part Subsititution for the SS101 cards

« **on:** May 04, 2006, 04:11:23 PM »

Hey Guys,

I home etched a couple SS 101 Cards to mess with, Could you help me find some substitutions that are no longer available? I have tried before to use the "recommended" substitutions that mouser gives and it doesn't always work out.

1N416A

Suggested replacement: http://www.fairchildsemi.com/ds/1N/1N4150.pdf

2N3566

http://www.centralsemi.com/leadedpdf/LSSGP076.PDF

2N3645

http://www.centralsemi.com/leadedpdf/LSSGP076.PDF

Lastly, I can't seem to find any 5pf or 10pf polystyrene caps... know of anywhere??

whatcha think??
:grin:

« **Reply #1 on:** May 05, 2006, 11:02:59 PM »

just use a npo ceramics...

« **Reply #2 on:** May 06, 2006, 08:02:50 AM »

where did you get the artwork to etch the board? I would like to do a couple of 101s.

« **Reply #3 on:** May 30, 2006, 06:25:43 PM »

moved my posting from another ss 101 thread to here:

Quote from: "matta"

Here is the Schematic of the card it is actually of the 610 Compressor, which features a 101 card.

http://edanders.home.comcast.net/diy/ss_schem.pdf

FWIW, comparing the patent-text with this schematic I see the patent talks about all Ge-transistors except for the output devices.

The schematic as drawn here has all Si-types. Again, FWIW, but I'm getting curious to which types do people have in their original cards ?

The drawn schematic mentions 2N3566 for Q1,4,5 (NPN) & 2N4248 for Q2,3 (PNP).

So that 2N3645 has also been spotted for the two PNP's ?
Looks like it's all not too critical - over here (Europe) I might be going for BC327A for the PNP's.

Any news at your side in case you used something else already ?

Regards,

Peter

« **Reply #4 on:** May 30, 2006, 06:28:38 PM »

Since seemingly original types are all Si it might be even easier. Looks like BC550 & BC560 could work for a first incarnation.

So FWIW, has anyone actually original cards with Ge-transistors ?!?

« **Reply #5 on:** May 31, 2006, 11:34:12 AM »

Quote from: "clintrubber"

Since seemingly original types are all Si it might be even easier. Looks like BC550 & BC560 could work for a first incarnation.

So FWIW, has anyone actually original cards with Ge-transistors ?!?

After some more reading it looks like all cards are using only Silicon-transistors, as for instance stated in the docs posted by Matt. This despite the patent talking about 3 of 5 being Germanium.

So if anyone out there happens to have with Ge-types give us a yell.

« **Reply #6 on:** February 21, 2012, 07:30:56 PM »

I have two Spectra Sonics 110A boards,
and although the schematic says the Diodes are 1N416A , I think this part is wrong.
I couldnt find any info on the 1N416A anywhere, maybe because it never existed.

Using the color code on the diodes (yellow, blue, brown , brown), the part number will be 1N461A, maybe theres a typo in schematic for both the 101 and the 110A preamp cards.

Anyone knows what Diode could be used as a replacement for the 1N461A?

1N461A specs
Max peak reverse voltage - 30v
Max forward voltage - 1v
forward current - 100mA
reverse current (25ºc) - 0.5
reverse voltage - 25v
Power dissipation - 250

thanks

« **Reply #7 on:** February 21, 2012, 08:57:51 PM »

NTE recomends this one.

http://www.nteinc.com/specs/100to199/pdf/nte177.pdf

Regards,
Mark

« **Reply #8 on:** February 21, 2012, 11:54:28 PM »

Quote from: Biasrocks on February 21, 2012, 08:57:51 PM

NTE recomends this one.

http://www.nteinc.com/specs/100to199/pdf/nte177.pdf

Regards,
Mark

Thanks Mark,
But the specs seem a bit off compared to the 1N461A

« **Reply #9 on:** February 22, 2012, 01:26:16 PM »

The schematic I have suggests that the Input Transistor can be National 2N3566 or a CDC CS1711.

As far as the diodes go, you need to figure out what parameters are most important, in other words the NTE equivalent may very well work fine.

Regards,
Mark

« **Reply #10 on:** February 23, 2012, 12:02:12 AM »

Thanks Mark,

can someone please confirm if the diodes are in fact 1N461A and not 1N416 like it says in the schematic?

thanks

« **Reply #11 on:** February 23, 2012, 01:17:49 PM »

Quote from: Whoops on February 23, 2012, 12:02:12 AM

Thanks Mark,

can someone please confirm if the diodes are in fact 1N461A and not 1N416 like it says in the schematic?

thanks

The schematic I have shows 1N461.

It's funny, I have 3 reversed engineered versions of the 101 schematic, which one is correct I wonder?

This version shows the three diodes terminated to ground through a 4K99 resistor.

It looks like the diodes are there for voltage drop, if that's the case I think almost any small signal diode would work there.

Regards,
Mark

« **Reply #12 on:** February 23, 2012, 01:22:03 PM »

Another version, this one looks to be the official version w/pencilled in values.

Regards,
Mark

« **Reply #13 on:** February 23, 2012, 09:06:40 PM »

Thank you so much Mark,
I though the same about the diodes, that if they were being used for voltage drop, that you could easily replace them with some modern diodes.

Do you have any idea of the voltage drop that it's happening there?

The schematic with the wrong diode part number , 1N416 instead of 1N461 is for the 110A , it's this one:

« **Reply #14 on:** February 23, 2012, 09:22:27 PM »

Ah, you're doing a 110 card. I got confused because of the thread title. I've got some cards here.

I found a datasheet for the 1n461a that specifies a voltage drop of 1V, so it looks like you need to drop 3v's in total.

Looks like the 1n4150 might fit the bill.

http://canada.newark.com/vishay-semiconductor/1n4150-tr/switching-diode-50v-200ma-do-35/dp/48F4703?in_merch=Popular%20Products

I've included a picture of a newer 110 card from the Spectrasonic site, you can see that the diodes appear to be regular silicon parts.

I can't make out a part number on the diodes at all. Here's some images to help you.

I've uploaded high res versions to my site for you to download as well.

http://sharktankpro.com/GDIY/SS110/

You should also check out these links for some great info.

Go to http://www.pat2pdf.org/ and enter Patent #3376515 it fully explains the circuit. In one paragraph he talks about using regular diodes instead of zeners for lower noise. That implies to me that they are there to simply drop the voltage.

This thread has a wealth of information that applies to the 110 cards as well as the 101's.

http://www.groupdiy.com/index.php?topic=11466.100

Regards,
Mark

« **Reply #15 on:** February 23, 2012, 09:49:32 PM »

Photo 2

« **Reply #16 on:** February 23, 2012, 09:50:08 PM »

Photo 3

« **Reply #17 on:** February 23, 2012, 09:50:36 PM »

Photo 4

« **Reply #18 on:** February 23, 2012, 10:32:16 PM »

Photo 1

« **Reply #19 on:** February 23, 2012, 10:45:00 PM »

Thank you so much for your help Mark,
yes my boards are 110A, I posted in this thread since the parts discussed for the 101 where the same (diodes and transistors) as the ones for the 110A.

I have 2 original boards and would love to build maybe 2 to 6 more, I've been searching in ebay for these cards but they don't appear for sale as much as before. Probably people started to realize their potential.

The board itself is quite simple, really easy to self etch at home, I was still able to find some places where I could buy the original transistors, so I was just thinking if this is really as simple to DIY as I thought or if theres anything more complicated as far as transistor matching, or bias, or transistor hfe values that could set people back from DIY them?

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