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(Re) building a ZX Spectrum laserharpThe Cambridge show is nearing, and I want to bring my laserharp with me. Why? Because it's built around a ZX Spectrum +2: [IMG]http://benophetintern…
... boosted with a non inverting amplifier (the schematic shows a voltage ... the opto coupler is an amplifier version of the incoming signal ... -
strange solution with bad spectrum +2 t.v. sound2 weeks ago I bought a British 128 K ZX-Spectrum +2. At first it didn't have sound on the t.v. RF output. Adjusting L5 (IC 11: MC1376 audio modulato…
... output of the tape amplifier (located at the tape ... is that the tape amplifier is permanently supplied with ... the tape head and amplifier is mixed with the ... This way the tape amplifier is connected only to ... the same result - the amplifier is disabled in case ... -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... data corder. Since the LA6324 amplifier is toast. I have tried ... -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
Using your levels as a guide line, I made the most basic of amplifier circuit with two transistors on a breadboard and got the original ULA to accept the input. However not all games load, so I need to improve the amplifier circuit. -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... .photobucket.com/albums/xx284/arioch1973/amplifier.png[/IMG]
UPDATE2 ... -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... .photobucket.com/albums/xx284/arioch1973/amplifier.png[/IMG]
UPDATE2 ... -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... .photobucket.com/albums/xx284/arioch1973/amplifier-1.png[/IMG] -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... in- and output of an amplifier, then you would have a ... -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... ;10 yr) there was an 'amplifier' for headphones published in Elektuur ... -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
After some experimentation, I have the current configuration that to me looks promising. It provides a signal that is between 900mV and 3V peak to peak.
[IMG]http://i764.photobucket.com/albums/xx284/arioch1973/amplifier-2.png[/IMG] -
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... and cant use the LA6324 amplifier that is built into the ...128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
[QUOTE=Johan1973;649799]cant use the LA6324 amplifier that is built into the datacorder (mine is toast).[/QUOTE]
You could always replace it, looks to be the same as an LM324 which are easy to get.Problems with stereo kit for AYSomeone has bought a stereo kit from me to add to his 128K ZX Spectrum. Problem however is that one of the channels is a less loud than the other tw…
... check:
1) The used amplifier and speakers, do they work ...Replacing ZTX650 with BD139Today I blew up one of the GALs on one of my DivIDEs while testing on my Toastrack. Shorted M1 with 12V and the 12V circuit broke. I had to replace T…
... power-on-led, an audio amplifier-speaker-volume-knob, an I ...128k +2 (grey) Ear mod - New ULA and still problemsBverstee kindly sold me a 128K ula since the one in my +2 seemed to have a broken ear in. But even with the new ULA, I still can not load games throu…
... datacorder and put back the amplifier I have built. Will look ...Tape loading from PCSo, I found that I had been using the wrong audio jack socket on my 48k for tape loading (my spectrum is in a third party case, so there are not labe…
... for a Spectrum. A small amplifier of the sort intended for ...Tape loading from PCSo, I found that I had been using the wrong audio jack socket on my 48k for tape loading (my spectrum is in a third party case, so there are not labe…
... /> 1. You can use an amplifier. For example use an external ...Tape loading from PCSo, I found that I had been using the wrong audio jack socket on my 48k for tape loading (my spectrum is in a third party case, so there are not labe…
... use power speakers as signal amplifier, however I'm using Thinkpad ...Tape loading from PCSo, I found that I had been using the wrong audio jack socket on my 48k for tape loading (my spectrum is in a third party case, so there are not labe…
... it may damage the output amplifier on the soundcard. Just because ...Tape loading from PCSo, I found that I had been using the wrong audio jack socket on my 48k for tape loading (my spectrum is in a third party case, so there are not labe…
... laptops will use a audio amplifier chip that has short circuit ...Tape loading from PCSo, I found that I had been using the wrong audio jack socket on my 48k for tape loading (my spectrum is in a third party case, so there are not labe…
... it may damage the output amplifier on the soundcard. Just because ...Dedicated Spectrum Emulation Machine Based on Raspberry PiI've mentioned this in another thread, so I thought I'd give it a thread of its own. I've wanted to build a dedicated Spectrum emulator for a long t…
... want to bother with an amplifier circuit.
Twin Interface ...Tape loading for realHi, Having failed to load anything from my laptop or phone into my 48k, I have sourced a data recorder. An acorn ALF03. When I received the item I …
... not have it's own amplifier, hence no built in ... to connect this to an amplifier to boost this output, ... then you could connect the amplifier to a speccy. I'm ... computers must of had the amplifier built into them.
... a built-in speaker/amplifier and has a 3. ...Edge connector breakout board/level translator boardFor a new project I'm thinking of working on (gah, too many projects...) I'm going to be making a new edge connector breakout board. Basically what …
... />
My first amplifier was a really good amplifier if you wanted ...Stuff for sale[URL="http://my.ebay.co.uk/ws/eBayISAPI.dll?MyEbayBeta&CurrentPage=MyeBayNextAllSelling&ssPageName=STRK:ME:LNLK:MESX"]Here[/URL] Hope that link works…
Got a red kempston interface, a ZX Box Sound Amplifier (boxed), a Cheetah Sweet Talker (boxed), a Kempston PRO Joystick Interface and a Collins Gem Micro Facts Sinclair dictionaryStuff for sale[URL="http://my.ebay.co.uk/ws/eBayISAPI.dll?MyEbayBeta&CurrentPage=MyeBayNextAllSelling&ssPageName=STRK:ME:LNLK:MESX"]Here[/URL] Hope that link works…
... interface, a ZX Box Sound Amplifier (boxed), a Cheetah Sweet Talker ...WIP: ULAPlus hardware implementationThis aims to be an "almost" plug-in replacement for the Sinclair ULA chip fitted in Spectrum 16K/48K/Plus machines. It comes in a form of a small PC…
... is terribly deaf. A proper amplifier and signal conditioner will be ...Is the 128K heatsink's TV out modulator kit repairable?I have a 128K+ Spectrum that is working absolutely fine and is giving out the perfect picture from its RGB out socket (with the right cable ofcourse)…
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"2SC9018 - AM/FM IF AMPLIFIER, LOCAL OSCILLATOR OF FM/VHF ...Preamp Solution for Speccys?Hi, I was wondering what people were using to amplify their sound card or line level datacorder signal to a loud signal for a speccy. Is anyone usin…
Don't know if this would interest you: [URL="http://www.bowood-electronics.co.uk/product_info.php/audio-amplifier-kit-tba820m-12-watts-p-1067"]Audio Amplifier Kit (TBA820M 1.2 watts)[/URL]
[I][B]Mark[/B][/I]