Improvised internal speaker on Spectrum 128K plus
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- Posts: 2169
- Joined: Sat Nov 26, 2016 2:42 am
Improvised internal speaker on Spectrum 128K plus
Hi all
Just got a toastrack and it has an interesting custom feature - an internal speaker! Why, I guess I will never know but it is here so I thought I would share some photos before trying to figure out how to get rid of it...
Just got a toastrack and it has an interesting custom feature - an internal speaker! Why, I guess I will never know but it is here so I thought I would share some photos before trying to figure out how to get rid of it...
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
- 1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Improvised internal speaker on Spectrum 128K plus
Well, whoever did the dirty deed, at least used a proper audio power amplifier chip
Mark
Mark
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
-
- Posts: 2169
- Joined: Sat Nov 26, 2016 2:42 am
Re: Improvised internal speaker on Spectrum 128K plus
And fitted it very neatly - it was surprisingly easy to remove. And I still have sound.
And the bits.
And the bits.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: Improvised internal speaker on Spectrum 128K plus
You forgot something!!
- Attachments
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- I'LL JUST LEAVE THIS HERE...NOW DO THE DECENT THING!!!
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- Posts: 2169
- Joined: Sat Nov 26, 2016 2:42 am
Re: Improvised internal speaker on Spectrum 128K plus
I was wondering about the improvised heat sink but given the larger case?....
(Lardo ducks and covers).
(Lardo ducks and covers).
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: Improvised internal speaker on Spectrum 128K plus
This is my attack Moggy, Keith.
HE KNOWS WHERE YOU LIVE!!!!!
HE KNOWS WHERE YOU LIVE!!!!!
- Attachments
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- "DO I EXPECT YOU TO REMOVE THAT HEATSINK????
NO I EXPECT YOU TO DIE MR LARDO." - cat2.jpeg (14.59 KiB) Viewed 5827 times
- "DO I EXPECT YOU TO REMOVE THAT HEATSINK????
- 1024MAK
- Posts: 5118
- Joined: Mon Sep 26, 2011 10:56 am
- Location: Looking forward to summer in Somerset, UK...
Re: Improvised internal speaker on Spectrum 128K plus
ZX81 Variations
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
ZX81 Chip Pin-outs
ZX81 Video Transistor Buffer Amp
Standby alert
There are four lights!
Step up to red alert. Sir, are you absolutely sure? It does mean changing the bulb
Looking forward to summer later in the year.
-
- Posts: 2169
- Joined: Sat Nov 26, 2016 2:42 am
Re: Improvised internal speaker on Spectrum 128K plus
You can’t hit what you can’t see.
In my head.
But meanwhile in reality...
In my head.
But meanwhile in reality...
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
Re: Improvised internal speaker on Spectrum 128K plus
touché Lardo nice comeback.
But more importantly, nice little toast-rack you have there, excellent job.
But more importantly, nice little toast-rack you have there, excellent job.
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- Posts: 2169
- Joined: Sat Nov 26, 2016 2:42 am
Re: Improvised internal speaker on Spectrum 128K plus
Thanks. Re-capped (where possible I make sure the rating and polarity of the caps is visible - this may be a little OCD), high efficiency voltage regulator (sadly no longer keeps my toast warm) and SCART 5V mod done (no more composite output but the RGB quality is superb). Good to go! Just waiting on the Royal Mail to bring me a lovely keyboard membrane from our own RWAP.
The heatsink is very firmly attached so is going to have to stay.
The heatsink is very firmly attached so is going to have to stay.
ZX80
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA
ZX81 iss 1 (bugged ROM, kludge fix, normal, rebuilt)
TS 1000 iss 3, ZXPand AY and +, ZX8-CCB, ZX-KDLX & ChromaSCART
Tatung 81 + Wespi
TS 1500 & 2000
Spectrum 16k (iss 1 s/n 862)
Spectrum 48ks plus a DIVMMC future and SPECTRA