Tape leads: Difference between revisions

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[[category:Hardware]]
[[category:Spectrum]]
Problems with loading software from tape (or virtual tape files) onto original Spectrum hardware are often caused by using incorrect tape leads and incorrectly identifying sockets. Different Spectrum models were supplied with different tape leads, all of which were designed to be used with mono cassette recorders.
Problems with loading software from tape (or virtual tape files) onto original Spectrum hardware are often caused by using incorrect tape leads and incorrectly identifying sockets. Different Spectrum models were supplied with different tape leads, all of which were designed to be used with mono cassette recorders.


==Original tape leads==
==Original tape leads==
The [[ZX Spectrum 16k/48k]] and [[ZX Spectrum+ 128K]] both have a pair of 3.5mm mono sockets labelled EAR and MIC. These computers were supplied with a twin cable terminated at each end with a pair of 3.5mm mono jacks.
The [[ZX Spectrum 16K/48K]] and [[ZX Spectrum 128]] both have a pair of 3.5mm mono sockets labelled EAR and MIC. These computers were supplied with a twin cable terminated at each end with a pair of 3.5mm mono jacks.


Note that the EAR socket is the '''input''' and connects to the earphone output of the cassette deck while MIC is the '''output''' and should be connected to the microphone input.
Note that the EAR socket is the '''input''' and connects to the earphone output of the cassette deck while MIC is the '''output''' and should be connected to the microphone input.


The [[ZX Spectrum +2A/2B, +3/3B#+2A/+3|ZX Spectrum +3]] has a single 3.5mm stereo socket which is used for both tape input '''and''' output. The +3 was not supplied with a suitable cable but details are included in the manual. The tip of a 3.5mm stereo jack is connected to the MIC output, the ring connected to the EAR input (sleeve is ground common to both). The diagram in the manual shows a twin lead from the stereo jack to a pair of mono jacks for the earphone and microphone sockets of a mono cassette deck.
The EAR input was disconnected on the Z70830 motherboard when assembled as a [[ZX Spectrum +2A/2B, +3/3B#+2A/+3|+2A]] but can be restored easily by the addition of one capacitor.


The [[ZX Spectrum +2A/2B, +3/3B|ZX Spectrum +3]] has a single 3.5mm stereo socket which is used for both tape input '''and''' output. The +3 was not supplied with a suitable cable but details are included in the manual. The tip of a 3.5mm stereo jack is connected to the MIC output, the ring connected to the EAR input (sleeve is ground common to both). The diagram in the manual shows a twin lead from the stereo jack to a pair of mono jacks for the earphone and microphone sockets of a mono cassette deck.
The [[ZX Spectrum +2]] and [[ZX Spectrum +2A/2B, +3/3B#+2B & +3B|+2B]] have no provision for loading from an external tape deck so no leads were provided. The Z70833 motherboard found in most black +2s can be modified to restore the same pinout (and hence tape lead) as the +3 but this requires cutting a circuitboard trace to separate the tip and ring of the stereo socket.
The EAR input was disconnected on the [[ZX Spectrum +2A/2B, +3/3B|+2A]] but can be restored easily by the addition of one capacitor on the motherboard.
 
The [[ZX Spectrum +2]] and [[ZX Spectrum +2A/2B, +3/3B|+2B]] have no provision for loading from an external tape deck so no leads were provided. The +2B can be modified to restore the same pinout (and hence tape lead) as the +3 but this requires cutting a trace on the motherboard to separate the tip and ring of the stereo socket.
 


==Connecting to stereo equipment==
==Connecting to stereo equipment==
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Normal off-the-shelf stereo to stereo leads however are '''not''' suitable for '''any''' spectrum model.
Normal off-the-shelf stereo to stereo leads however are '''not''' suitable for '''any''' spectrum model.


On the 16/48k and 128K the type of mono sockets used will only contact the tip and ring of the stereo jack plug, connecting the ring (right hand audio channel) to the Spectrum's ground and leaving the sleeve not grounded. The usual symptom of this is that the signal reaching the Spectrum is far too low to load.
On the 16K/48K and ZX Spectrum 128 the type of mono sockets used will only contact the tip and ring of the stereo jack plug, connecting the ring (right hand audio channel) to the Spectrum's ground and leaving the sleeve not grounded. The usual symptom of this is that the signal reaching the Spectrum is far too low to load.


Using such a cable with the +3 is even worse because while the right hand channel is connected to the EAR input, the left hand channel is connected to the Spectrum's output. Again this is unlikely to cause permanent damage, but connecting two audio outputs to each other is generally a bad idea!
Using such a cable with the +3 is even worse because while the right hand channel is connected to the EAR input, the left hand channel is connected to the Spectrum's output. Again this is unlikely to cause permanent damage, but connecting two audio outputs to each other is generally a bad idea!

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