2sc536f

by **justadude** » Mon May 19, 2008 7:43 am

hi folks,
I am building mine with all ics and trannies socketed and going to experiment with many different parts, I'm not really interested in an exact clone anyhoo as I plan to add more to it later.

This transistor is the only part that is hard/expensive to buy other than the BA6110 OTA eveything else i have found rather cheap. But you can buy these trannies in bulk however you have to sort them by measuring hfe the F is about 160-320, in bulk you will get alot of rejects but you can buy them in the 100's at less than .10 a piece, and i am not sure if it will matter. I also bought NTE85 and 2SC945 as well, so i am going to try mixing and matching and see what results.

Anyways, I'll let you know how it goes when I start getting to work on it, I am going to try lots of stuff and see what matters the most where, all the other parts I have found easily.

by **phono** » Mon May 19, 2008 8:11 am

2SC945(p) will work in place of 536 with no aparent differnce im told

by **justadude** » Mon May 19, 2008 8:25 am

hi,
i've looked through the forum and found all the replacement part suggestions, so I had read that the 2sc945p is also a possible replacement, and NTE makes a trannie that is a replacement for it as well, however the NTE parts are more expensive then the originals at mouser! And they aren't exactly the same they are a bit different. The cheapest I could find 2SC536f was for around $1.10 each, and I am going to order them. Other than that I have found all the other parts fairly easily however I don't know what kind of volume they have and also a few parts were out of stock at different places. I have not got my pcb yet but I ordered the parts beforehand and have been going through the 2sc536s, out of 170 or so I have 24 with hfe between 160 and 320, so i will try them. But I am socketing everything which will allow me to plug n play with components ;-)

by **LoopStar** » Mon May 19, 2008 2:09 pm

phono wrote:2SC945(p) will work in place of 536 with no aparent differnce im told

Yepp. Works like a charm in my second x0x.

edit: here you'll find some samples of both of my boxes. x0x #1 with 536f and x0x #2 with 945p. Both x0xes have a 733k for the square wave, and x0x #2 has high beta 733ps in the filter section. But there were no changes necessary in the circuitry because of the replacement transistors.

by **justadude** » Mon May 19, 2008 8:27 pm

well i didnt mean to clutter up the site with MORE posts about the rare parts but it wasn't only about rare parts but also that I am socketing all the semiconductors so I can try out many different things.

I wonder how bad manufacturing was in the 80s, if it was as bad as like in the 60s ;-)

I would think these parts in a real 303 would be from the same batch and all pretty close... but I built some fuzz pedals using germanium transistors and it was a nightmare to find one suitable but now they have places like Small bear who will match them for you for a small fee. I am going to see where it matters the most and i enjoy building kits and this one is good. Sadly I was on the list back in 2004 but I moved and forgot the password to the email I used so I never got my kit. Sorry Ladyada

by **justadude** » Mon May 19, 2008 8:43 pm

LoopStar wrote:
phono wrote:2SC945(p) will work in place of 536 with no aparent differnce im told

Yepp. Works like a charm in my second x0x.

edit: here you'll find some samples of both of my boxes. x0x #1 with 536f and x0x #2 with 945p. Both x0xes have a 733k for the square wave, and x0x #2 has high beta 733ps in the filter section. But there were no changes necessary in the circuitry because of the replacement transistors.

that is nice comparison you did, there is definitely a difference, the 2s945p is much more 'squelchy' sounding, people who say transistors don't sound different, you have proof that they do now ;-)

I have told people many times there is a difference but they laugh ahahah you are a crazy, I'm like whatever it is true.

by **LoopStar** » Tue May 20, 2008 2:20 pm

justadude wrote:
LoopStar wrote:
phono wrote:2SC945(p) will work in place of 536 with no aparent differnce im told

Yepp. Works like a charm in my second x0x.

edit: here you'll find some samples of both of my boxes. x0x #1 with 536f and x0x #2 with 945p. Both x0xes have a 733k for the square wave, and x0x #2 has high beta 733ps in the filter section. But there were no changes necessary in the circuitry because of the replacement transistors.

that is nice comparison you did, there is definitely a difference, the 2s945p is much more 'squelchy' sounding, people who say transistors don't sound different, you have proof that they do now I have told people many times there is a difference but they laugh ahahah you are a crazy, I'm like whatever it is true.

Hmmmm... I'm not too sure about that. The 536f isn't the only part that runs the whole show so I wouldn't say the 945p alone is the reason for the sound difference between my to x0xes. The only way to find this out would be to take a x0x with 536f and all of these with 945p.

by **justadude** » Tue May 20, 2008 3:13 pm

I thought that demo was one with 536f and one with 945p? Well that is what im going to do ;-)

Everything is being socketed. I have everything, the only thing I could not find was a BA662.

by **justadude** » Tue May 20, 2008 3:54 pm

ok i just put in orders for 2sc536f and 2sc945p so hope they are in stock, now I have everything plus lots of extras to try out ;-)

Is the BA662A pretty much impossible to find now? OTA do have effect on sound I prefer CA3080 over LM13600, much warmer sounding to me but then I am a crazy and hear differences in transistors so.. ;-)

by **phono** » Tue May 20, 2008 4:13 pm

justadude wrote:ok i just put in orders for 2sc536f and 2sc945p so hope they are in stock, now I have everything plus lots of extras to try out

Is the BA662A pretty much impossible to find now? OTA do have effect on sound I prefer CA3080 over LM13600, much warmer sounding to me but then I am a crazy and hear differences in transistors so..

just get a 6110, theres no difference apart from that its about 4db hotter on the 6110, checkout subatomics tests

by **justadude** » Tue May 20, 2008 4:44 pm

I can not locate a 662 anywhere so I had to get a 6110.

by **phono** » Tue May 20, 2008 5:01 pm

justadude wrote:I can not locate a 662 anywhere so I had to get a 6110.

well you didnt loose anything there

by **justadude** » Tue May 20, 2008 5:20 pm

heh, yeh, I spent extra money on different parts to test which arent necessary but I will try to use them for other projects when I am done but I dont care I didnt lose much money however tbh the rare parts are really not the expensive part of building this thing.

by **mome rath** » Tue May 20, 2008 5:45 pm

justadude wrote:I can not locate a 662 anywhere so I had to get a 6110.

i got one out of a boss cs-2

it also had 3 2SK30A-Y transistors :idea:

by **justadude** » Tue May 20, 2008 5:48 pm

AhahaAAHHH you kilt a Boss CS-2!!! They arent really good compressors anyways but that gives me an idea I have some old boss pedals somewhere.

2sc536f

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