[TechAssist] Re: (TechAssist) (Sony) Transistor D2578 - need sub
- From: Jorge Camboni <geo@xxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 05 Sep 2004 22:34:38 -0500
I agree with you, and you can also use the2SD2553 which is very similar to the
2539 but with 1700v vce (which you do not need at all, but it is just there...)
They run cooler because of their higher dc gain and higher ft.
You can replace most HOTs with those. The 2sd2580 is a very good choice
too (2sd2579/81if you need a damperless one)
Jorge
At 11:17 p.m. 05/09/2004 -0230, you wrote:
>I use 2SD2539 as a replacement for a lot of H/O's. In the Daewoo it is
>recommended that the 2SD1880 be replaced with it. I runs a lot cooler then
>1880 and the Daewoo's problem is there is thermal runaway in H/O section.
>
>Buck Pasher
>Buck's TV
>Gander Newfoundland
>Canada
>709-256-7738 (Fax & Phone)
>
>
>
>----- Original Message -----
>From: "Jorge Camboni" <geo@xxxxxxxxxxxxx>
>To: <techassist@xxxxxxxxxxxxx>
>Sent: Sunday, September 05, 2004 6:47 PM
>Subject: [TechAssist] Re: (TechAssist) (Sony) Transistor D2578 - need sub
>
>
> > Best sub is 2SD2580- pretty good ones are 2SD2539 and 2SD2553 (proven
> > many times, usually run almost cold).
> > The 2SD1880/81 may work, you have to try them and monitor the temperature,
> > they're lower gain transistors than 2578/80 series which are much newer.
> > All of them have an integrated damper diode.
> > There are more subs, of course, those are the most popular (and
> > unexpensive) ones.
> > Jorge
> >
> > At 07:44 p.m. 04/09/2004 -0500, you wrote:
> > >I need a sub for transistor D2578 out of a Sony TV. Thanks.
> > >
> > >Kenny Barnes
> > >Kenny Barnes tv
> > >928 South Marshall st.
> > >5154325250
> > >Boone, Iowa 50036
> > >
> > >
> >
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> > Jorge Camboni, GY Electronics, Richardson, TX
> >
> >
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Jorge Camboni, GY Electronics, Richardson, TX
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