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Re: Reliability and clongevity?

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Did not Simtech have some new membranes, there is one in mine.


Brian

-- 
 -----  -
This newsgroup posting comes to you directly from...
The Sofa of Brian Gaff...
briang1@blueyonder.co.uk
Blind user, so no pictures please!
"Volker Bartheld" <news2016@bartheld.net> wrote in message 
news:1s5bgmkbhuor7.dlg@news.bartheld.net...
> Hi!
>
> On Tue, 31 May 2016 09:28:10 +0100, Brian Gaff wrote:
>> I was just wondering what people are finding with real Speccies as per
>> the degeneration of chips and other specific components. are there any
>> problems which will, in the end mean no real machines will still be
>> working.
>
> In the end, nothing will be working anymore. Concretely, my original 
> Speccy
> (Issue 2) works fine, I've replaced the memory chips to get 2x32k, upped
> the voltage regulator with a L78S05CV and some larger capacitors and added
> a FBAS/Composite out, similar to
> http://www.retrogamescollector.com/simple-zx-spectrum-composite-mod/
> , but without deactivating the modulator.
>
> No shot CPU, no fried ULA, no dried caps, no rotten memory
>
>> Obviously there is the keyboard membranes
>
> Ah keyboards. No problem with the LoProfile Professional I bought:
> http://www.worldofspectrum.org/infoseekid.cgi?id=1000235
> Seems to hold up better then most of the Chinese crap sold nowadays.
>
>> I was thinking about ulas,
>> modulators and components made obsolete by time?
>
> No probs. Microdrive felt foams disintegrated and the BASF tape suffered
> from print through. The former can be fixed by using standard adhesive 
> foam
> tape and the original felt thingie, the latter only by reformatting (=data
> loss) or rocket science/low level forensic analysis.
>
> The ULA could be replaced by a CPLD, check out
> http://opencores.org/project,zx_ula
> http://www.zxdesign.info/harlequin.shtml
> , this would be your only choice if you can't source some antique Ferranti
> stock.
>
>> I suppose in the end tvs with analogue tuners will be gone, and then we
>> have issues with either modifying to use other inputs or hacking the 
>> output
>> in some way.
>
> http://www.retrogamescollector.com/simple-zx-spectrum-composite-mod/
> worked well for me. Yeah, it's a hack and people who want their device 
> 100%
> stock will already start hyperventilating.
>
>> Also how do modern tvs cope with the new wide screen systems?
>
> They all have a 4:3 letterbox mode, adding some black stripes to both
> sides.
>
> Greets,
> Volker
>
> -- 
> @:  W E B 2 0 1 6 at B A R T H E L D dot N E T
> 3W: www.bartheld.net 

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Reliability and clongevity? "Brian Gaff" <briang1@blueyonder.co.uk> - 2016-05-31 09:28 +0100
  Re: Reliability and clongevity? Guesser <alistair@zxnet.co.uk> - 2016-05-31 12:21 +0100
    Re: Reliability and clongevity? "Brian Gaff" <briang1@blueyonder.co.uk> - 2016-06-01 09:42 +0100
    Re: Reliability and clongevity? Duncan Snowden <duncan_s@talktalk.net> - 2016-06-01 16:51 +0100
      Re: Reliability and clongevity? Guesser <alistair@zxnet.co.uk> - 2016-06-01 17:14 +0100
      Re: Reliability and clongevity? "Chris" <chris.usenet@mail-filter.com> - 2016-06-02 00:59 +0100
  Re: Reliability and clongevity? Volker Bartheld <news2016@bartheld.net> - 2016-06-01 07:58 +0200
    Re: Reliability and clongevity? "Brian Gaff" <briang1@blueyonder.co.uk> - 2016-06-02 19:43 +0100
  Re: Reliability and clongevity? lee.jtcltd@gmail.com - 2016-08-02 07:38 -0700

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