Re: Modern replacements / xref for deflection transistors

I was also looking at BD237 / BD338 but only good for 3mhz....

http://www.datasheetdir.com/BD237+download

Again.... feel free to comment !!

Thanks, Col

----- Original Message -----
From: "Colin Davies" <colin.w.davies@btopenworld.com>
To: <vectorlist@vectorlist.org>
Sent: Sunday, November 25, 2012 9:13 PM
Subject: Re: VECTOR: Modern replacements / xref for deflection transistors

> Yep, I think you have to take into account the heat disspation etc....
>
> For the 07's / 57's ...I'm sure I was looking at MJE15030's /31's for
> these... Well over rated... and also MJF's (fully insulated packages -
> would be pefect if they work !!)... They were cheap enough... so you could
> fit and forget for the next 30 years as very unlikely to fail !! - Can't
> recall If I ever refitted a board with them though to test !!
>
> http://www.onsemi.com/pub_link/Collateral/MJF15030-D.PDF
>
> Can any one comment on these please ????
>
> You have to swap the legs over though, so not a straight fit !! - heat
> sink also becomes live if using the MJE ones.. but the heat sinks are
> floating....
>
> I'll be looking at some vectors next year no doubt !!
>
> Regards, Colih
>
>
>
> ----- Original Message -----
> From: "Ian Eure" <ieure@mac.com>
> To: <vectorlist@vectorlist.org>
> Sent: Sunday, November 25, 2012 3:19 AM
> Subject: Re: VECTOR: Modern replacements / xref for deflection transistors
>
>
>> On Nov 24, 2012, at 5:08 PM, Rodger Boots wrote:
>>
>>> MPSU07 1 watt (no heatsink), 10 watts with heatsink.
>>> ZTX653 1 watt (no heatsink AT ROOM TEMPERATURE), 2.5 watts with heatsink
>>> AT ROOM TEMPERATURE.
>>> If the MPSU07 is being used WITHOUT a heatsink the ZTX653 WITH a
>>> heatsink should work.
>>> A TO-92 case part isn't going to be reliable replacing a heatsinked
>>> MPSUanything.
>>> Also, remember to check secondary breakdown ratings on any parts being
>>> used with more that 20 volts.
>>>
>> Okay, so what's a good modern replacement for the Q606/Q607/Q706/Q707? I
>> was going to get the ZTX653 / ZTX753 and press-on heatsinks, but it
>> sounds like that may not be a good idea. Is there an equivalent in a
>> TO-202N package? It looks like Bob Roberts stocks the MPSU57/MPSU07, but
>> they're expensive enough that I wouldn't just buy a couple PCBs worth of
>> parts, which is what I'd like to do.
>>
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Received on Sun Nov 25 16:22:47 2012