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Groups > comp.sys.sinclair > #4243
| From | "Brian Gaff" <briang1@blueyonder.co.uk> |
|---|---|
| Newsgroups | comp.sys.sinclair |
| Subject | Re: Replacement transistors for Spectrum +2 (grey) |
| Date | 2016-09-09 07:35 +0100 |
| Organization | A noiseless patient Spider |
| Message-ID | <nqtl72$4hs$1@dont-email.me> (permalink) |
| References | <99550f6c-a9b1-42e3-a571-9c731c28dd95@googlegroups.com> |
In many cases, just first figure out whether they are pnp or npn and look at the disipation. In many cases general purpose transistors used to work well enough in many places, as I recall. Obviously its been a long time and memories fad, but are you absolutely sure transistors have failed, and exactly why they failed if they indeed have. I know transistors are cheap but you really don't want to be fiddling about unless you are pretty sure the fault that caused them to fail is no longer present. Dodgy capacitors, etc. It is also a good idea to make sure the psu is the right one and not faulty. The plus 2 had a voltage regulator inside in a socket very prone to dodgy connections. Brian -- ----- - This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... briang1@blueyonder.co.uk Blind user, so no pictures please! "Alex" <alexhopson@gmail.com> wrote in message news:99550f6c-a9b1-42e3-a571-9c731c28dd95@googlegroups.com... Hi, I'm trying to fix a Spectrum +2, I suspect the transistors may be at fault and am looking to order some replacements. It seems the original transistors aren't used any more so I'm trying to figure out what the modern equivalents are there's guides for 48ks but not +2s, this is what I have so far: TR1,3,6 BC239B/C549B - can't figure out equivalent TR2 BC308B/C558B - can't figure out equivalent TR4,5,7 2N3904 - 2N3904 - same TR9 ZTX650 - ZTX651 TR8 ZTX213 - BC557 I'd be grateful if someone could fill the blanks and confirm my suggestions are suitable replacements. Thanks Alex
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Replacement transistors for Spectrum +2 (grey) Alex <alexhopson@gmail.com> - 2016-09-04 14:48 -0700
Re: Replacement transistors for Spectrum +2 (grey) AndyW <Andy@nojunqmail.com> - 2016-09-05 07:44 +0100
Re: Replacement transistors for Spectrum +2 (grey) Alex <alexhopson@gmail.com> - 2016-09-05 11:01 -0700
Re: Replacement transistors for Spectrum +2 (grey) AndyW <Andy@nojunqmail.com> - 2016-09-06 07:15 +0100
Re: Replacement transistors for Spectrum +2 (grey) Volker Bartheld <news2016@bartheld.net> - 2016-09-06 08:47 +0200
Re: Replacement transistors for Spectrum +2 (grey) "Brian Gaff" <briang1@blueyonder.co.uk> - 2016-09-09 07:35 +0100
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