128K +2 Grey tape amp interference.

A place to discuss the ZX80's and ZX81's younger brother - the Sinclair ZX Spectrum
Post Reply
User avatar
Erm
Posts: 225
Joined: Thu Jun 20, 2019 7:07 pm
Contact:

128K +2 Grey tape amp interference.

Post by Erm »

My +2 grey has loud audio hum from the tape amplifier. It goes away when the tape part isn't plugged in, so it is definitely the cause.

I read about adding a reed relay across the tape motor here:

https://worldofspectrum.org/forums/inde ... -errors/p1

The pics on that thread are long gone. I could probably work out what kind of reed relay to use etc, but would be interested to hear what others have used and to see pics of such a mod mounted to the +2 grey.
I'm Chris, a Brit in Germany (Chr$ on the QL forum). https:\\QXL.WIN < QL related collection.
User avatar
Erm
Posts: 225
Joined: Thu Jun 20, 2019 7:07 pm
Contact:

Re: 128K +2 Grey tape amp interference.

Post by Erm »

I did the mod. Used a SIL05-1A72-71D relay.

And it works a treat, no buzz on the audio, unless the motor is operating.
I'm Chris, a Brit in Germany (Chr$ on the QL forum). https:\\QXL.WIN < QL related collection.
Post Reply