Sony 2001D 2SK152 replacement ....

[marc]

Hello,

I fit a 3 pin plug and tried some transistors ..

I get a good result with a C369 ...

Any comments?

I did not find my stock replacements, but have a box of spare parts from ?? all kind of old electronics ... ;-)


Marc


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[RF Collins]

marc <nom...@be.com> wrote in news:m4tmot$92s$1...@dont-email.me:

>
>
> Hello,
>
> I fit a 3 pin plug and tried some transistors ..
>
> I get a good result with a C369 ...
>
> Any comments?
>
> I did not find my stock replacements, but have a box of spare parts
> from ?? all kind of old electronics ... ;-)
>
>
> Marc
>
>

You need an N channel JFET. Only replacement I have seen is an NTE312.
Radio Shack used to stock them in the stores, now only online.


Jim

[RF Collins]

RF Collins <h...@c.com> wrote in news:g9CdnaJ8rIcM5u_JnZ2dnUU7-
Ked...@giganews.com:

Here is a tutorial on the junction field effect transistor or JFET:

http://www.electronics-tutorials.ws/transistor/tran_5.html

[Michael Black]

On Sun, 23 Nov 2014, marc wrote:

>
> Hello,
>
> I fit a 3 pin plug and tried some transistors ..
>
> I get a good result with a C369 ...
>
> Any comments?
>
> I did not find my stock replacements, but have a box of spare parts from
> ?? all kind of old electronics ... ;-)
>
>

If the replacement isn't a jfet, it won't work at all. That "C369" sounds
more like a bipolar transistor, and if you get "good results", it's only
because the transitor is letting the signal pass through. It can't
amplify, bipolar transistors need forward biasing, and that's not there
since the transistor is supposed to be a jfet.

If you do a search, the need to replace that front end jfet (I'm assuning
that's where the part is) is fairly common, so there are various people on
the web writing about replacing it. I think they've often used an
available jfet, which won't be optimum, but will work better than a
bipolar transistor.

Michael

[marc]

Michael Black wrote:

> If you do a search, the need to replace that front end jfet (I'm assuning
> that's where the part is) is fairly common, so there are various people on
> the web writing about replacing it. I think they've often used an
> available jfet, which won't be optimum, but will work better than a
> bipolar transistor.

I've nbever had 5 leds on 153 DLF, now I have ...

Of course, I do not know anybody close to my location with such a radio (Furnes/Ypres/Dunkeirk/Lille)...

Same for AM radios. It coul be that shortwave is a little bit lees, but it is OK ...

Ali has them: 2sk152:

http://www.aliexpress.com/item/IC-2SK152-2SK152-10pcs/1951278662.html

[rossar...@gmail.com]

On Monday, November 24, 2014 1:23:12 PM UTC-8, marc wrote:
> Michael Black wrote:
>
> > If you do a search, the need to replace that front end jfet (I'm assuning
> > that's where the part is) is fairly common, so there are various people on
> > the web writing about replacing it. I think they've often used an
> > available jfet, which won't be optimum, but will work better than a
> > bipolar transistor.
>
> I've nbever had 5 leds on 153 DLF, now I have ...
>
> Of course, I do not know anybody close to my location with such a radio (Furnes/Ypres/Dunkeirk/Lille)...
>
> Same for AM radios. It coul be that shortwave is a little bit lees, but it is OK ...
>
> Ali has them: 2sk152:
>
> http://www.aliexpress.com/item/IC-2SK152-2SK152-10pcs/1951278662.html
>
>
>
> --

You may wish to order a 2SK152-2 part, specifically -2.
Per: http://www.conradhoffman.com/ICF2010.htm

[rossar...@gmail.com]

On Monday, November 24, 2014 1:23:12 PM UTC-8, marc wrote:

It ain't cheap, but an exact replacement appears to be available through:
http://www.bdent.com/2sk152-2-sony-transistor.html

[karab...@yahoo.com]

Ali Baba IS CHEAPEST-a bag of 10 FOR $18.

[Ross Archer]

However, they do not specify which gain batch these come from. The 2010 uses a 2SK152-2.
That's the exact replacement, for gain and performance.

[Mark Zenier]

In article <I9idnYckk-Lb4-_J...@giganews.com>,

I've got the 2SK152 datasheet on my ftp directory on ftp://ftp.eskimo.com
in the user directory for "mzenier", "Sony2SK152.pdf" . (They moved stuff
around on my ISP, so I don't remember the full URL).

It was designed for the head preamp for VCRs, so maybe the OP can
arm wrestle somebody for an old Beta VCR and find one in there.
Extreme anti-static precautions apply.

There was an small outfit that used semi foundrys to produce a variety of
small signal FETs and other strange stuff (at a price). I think that
they had the 2SK152. "Interfet"?


Mark Zenier mze...@eskimo.com
Googleproofaddress(account:mzenier provider:eskimo domain:com)

[karab...@yahoo.com]

NTE312 is listed as a replacement. $1.45 from MCM.

[ka6uup]

Google 2SK152 and you will find many sources for original Sony JFETS

[marc]

Mark Zenier wrote:

> I've got the 2SK152 datasheet on my ftp directory on ftp://ftp.eskimo.com
> in the user directory for "mzenier", "Sony2SK152.pdf" . (They moved stuff
> around on my ISP, so I don't remember the full URL).

under /home/mzenier

Thanks!

[jf...@my-deja.com]

Since no one else has mentioned it, ISTR that people have used 2N3819 and MPF102 to replace the front end JFET. When I Googled MPF102, one link came up for 10 for $4.80 on eBay. It seems to me that any small-signal n-channel jfet will work well enough to get you a functioning radio (but I have never actually made this repair). While you are at it, you might also want to put parallel back-to-back Si switching diodes (1N914 or 1N4148) between the gate and ground to protect the jfet from ESD.

[Michael Black]

I certainly alluded to that when I suggested doing a search for what
people did when they blew out the original FET.

In both cases, the devices you mention are very available jfets. They may
or may not be the best choice (especially if the biasing isnt' changed)
but they are the most likely devices to be available through hobby
channels. And people seem satisfied with the results. Michael Covington
had a hint up about this, and he's one of those people who'd be fussy if
he felt it mattered what the exact device was.

Michael

[dave]

On 11/23/2014 02:23 PM, marc wrote:
Any comparable polarity low noise fet you can squeeze in should be a
vast improvement.

[dave]

2sk170?