Marantz Transistor/Diode/Trimmer Sub Guide

[rBuckner]

If it were up for a vote I'd vote for sticky status.

 

[foldthe]

I have used it several times already and downloading the newest version is tiresome. Yes, sticky!!!

 

[Jonstigator]

I wish there was a better sub for 2sc1318.

 

[Steven Tate]

I wish there was a better sub for 2sc1318.

I wonder about 2SC3708S or T. Not available at Mouser, but is at Digikey.
2SC1318 — Vce=50V. Ic=0.5A. hFE=(Q:85-170), (R:120-240), (S:170-340)
2SC3708S - Vce=80V. Ic=0.5A. hFE=140-280
2SC3708T - Vce=80V. Ic=0.5A. hFE=200-400
Edit: minimum order looks large from Digikey.

 

[MBuras]

minimum order looks large from Digikey

They’ve recently added “marketplace products”. Seems kinda like Amazon third party sellers. The product you looked up actually comes from Rochester Electronics.

 

[Steven Tate]

They’ve recently added “marketplace products”. Seems kinda like Amazon third party sellers. The product you looked up actually comes from Rochester Electronics.

Yeah, and after an hour of looking., I can’t find anybody who sells them in quantities less than thousands.

 

[Steven Tate]

Obviously, nothing else to do today but obsess over this. I found On-Semi KSC1008CYTA that looks pretty close to the 2SC1318.
Vce=60V, Ic= 0.7A, hFE= 120-240.
I’ve never used that one. Wonder if it would work?

 

[Jonstigator]

. Wonder if it would work

That looks pretty darn close. I am willing to bet that KSC1008CYTA would work. I will give it a try in my experimental and follow up.

 

[catrafter]

2SC1318 TO-92 is still available.
My 1978 Fuji-Svea Japanese Transistor Substitution Guide says 2SD545 2SC1626 2SC1247A and 2SC1211 are good substitutes.

YMMV
Tom

 

[Jonstigator]

Thanks Tom

I looked around for 2SC1318 with no luck. I will go through the data sheets and compare all your suggestions plus the one Steve suggested.

 

[catrafter]

PM sent

Tom

 

[Jonstigator]

PM sent

Tom

Thank you for that excellent info. I will act upon it.

 

[MarantzRefrb]

Another item that would be really helpful to add to the Sub-Guide could be the single-turn Bourns trimmers. I had a difficult time getting the right trimmers for my 2215, there are so many variations for the pin out.

2215 and 2230:
100K ohm = 3386F-1-104LF
470 ohm = 3386F-1-471LF

 

[Steven Tate]

Another item that would be really helpful to add to the Sub-Guide could be the single-turn Bourns trimmers. I had a difficult time getting the right trimmers for my 2215, there are so many variations for the pin out.

2215 and 2230:
100K ohm = 3386F-1-104LF
470 ohm = 3386F-1-471LF

Done.....Or at least started with your subs. Anyone who wants to add trimmer subs for specific models, just put them in a post or PM me and I will add them. I can see how this would be useful to have all of the usual trimmer subs in one place.

 

[MarantzRefrb]

Thanks, Steve
3386F are the correct ones, I ordered 3386U and 3386P by accident also - they do work but are not ideal.

Bourns trimmer pin-out datasheet:
https://www.mouser.com/datasheet/2/54/3386-776606.pdf

 

[Steven Tate]

Updated. Added 2SC789.

 

[Skywatcher]

Updated. Added 2SC789.

TIP41C (NPN) is a perfect sub for this. They're both 3MHz and the TIP handles more voltage, current, and wattage.

 

[Steven Tate]

TIP41C (NPN) is a perfect sub for this. They're both 3MHz and the TIP handles more voltage, current, and wattage.

Looks good. I’ll make it sub 1 and MJE15030 sub 2. Thanks! I’m hoping over time to refine the list with suggestions like this.

 

[MarantzRefrb]

I see you added the trimmers for 2275, 2270, and 2245, nicely done! This will save a lot of time, thanks!

 

[MarantzRefrb]

The 2245 is missing page 27 in every SM I've found, and as luck would have it, Page 27 contains the specifics on the P750 L&R boards.

For a 2245, it's (4) 1K ohm trimmers:

(4) Bourns 3386H-1-202

Thanks!

EDIT: 2270 takes a 2.2K ohm - 3386H-1-222, and a 1K ohm - 3386H-1-102.

Thanks again for putting this altogether and keeping this up to date!