Hi,
Does anyone have any idea of how to make the cassette output from an Atmos louder? When I save a tape it is barely audible. I can save onto my laptop using Audacity but it is very quiet compared to my other 8-Bits.
Looking at the schematic there only seem to be a couple of resistors in between the 6522 and the cassette output so is there any way to boost the output?
Atmos cassette output
Atmos cassette output
Oric Extended Basic V1.1
(C) 1983 Tangerine
37631 Bytes Free
(C) 1983 Tangerine
37631 Bytes Free
Re: Atmos cassette output
Don't quote me on that, probably check the service manual instead - but I believe I've read somewhere that some machines have the wrong value for one of the resistor, and that ends up weakening the signal way too much.
Re: Atmos cassette output
Thanks DBug, will have a look inside my Atmos this afternoon...
Oric Extended Basic V1.1
(C) 1983 Tangerine
37631 Bytes Free
(C) 1983 Tangerine
37631 Bytes Free
Re: Atmos cassette output
According to the schematics the expected max. voltage should be around: 5V*(1/23) = 217mV (peak-to-peak) which is really low for standard "Line level". You can do some experiments - replacing R13 (1k) with bigger value (i.e. 4k7, 10k, etc.) and see the effect. At-least there is no risk to try.
Re: Atmos cassette output
Fitting a 4.7K resistor has made the output louder but not a massive amount. Tape is still not very loud but the signal recorded in Audacity on my laptop is visibly stronger. Maybe I need to swap out this Rockwell 6522A with a Synertek model down the line, I might stick a 10K in and try again
The other resistor was 22K so it was the correct value.
The other resistor was 22K so it was the correct value.
Oric Extended Basic V1.1
(C) 1983 Tangerine
37631 Bytes Free
(C) 1983 Tangerine
37631 Bytes Free