Hi everyone, this is a very interesting thread!
I've never seen the internals of a real covox plug before (but pictures of it on Great Hierophant's blog and on the web some pics the Covox speaker itself).
Anyway, I feel the urge to contribute something to this discussion and so I searched for my Covox clone.
It's a commercially made clone, not something I made myself.
I got it some time ago and it apparently was made in the 80s or early 90s in Germany by a company named RWElektronik
(judging by the price tag of DM27 and the obsolete 4-digit postal code).
It's not the real thing of course, but nevertheless it was made in the good ol' "covox days"..
So I thought it could answer some questions, as to how these things were made then.
Because of this, I took several close-up shots of the circuit and the package for you..
Speaking of the package, it also came with a leaflet and a 5.25" mini floppy.
I haven't ckecked the content yet, but I assume it contains some Public Domain stuff (ModPlay Pro, maybe ?)
The leaflet itself is rather bleak, I think. It contains some kind of clip art (hand drawn with a mouse, I guess).
It's interesting, though, that the drawing shows an old-fashioned stereo/ghetto blaster/boom box.
I haven't thought about using this, I often used my Covox clone with a self-powered pair of speakers or
a selfmade amplifier (the simple types using an LM386 or a single PNP transistor).
Maybe that's something we should also take into consideration here ?
I'm not sure, but perhaps these oldstyle devices performed more low-pass filtering or had a "stronger" sound
(thinking of the Sega MedaDrive, Model 1) ?
I'm ashamed to admit it, but I've never had a real Ghetto Blaster from that time..
OK, I had a tape recorder w/ radio and several cheap miniature ghetto blasters, but not the real thing.
That's why I wonder what kind of equipment people back in the Amiga days used.
I imagine that they used common stuff from before the multi media era, so no self-powered computer speakers,
but rather ghetto blasters, hifi stereos or radios with a phono jack (we once had a tube radio with such an input).
Anyway, I'm getting off-topic again.. 😅
Back to that plug again. It does contain several miniature resistors (SMD, I think) on a printed circuit board: 9x 2002 and 9x 1002.
It also has a cap labeled "104" on the output, which I think is 100 nF.
The casing is black and it also comes with a shielded cable (aprox. 2 metres; about 78inches/6.5 feet) and an RCA connector.
- No capacitor was hidden inside that connector in case you're wondering. 😀
No idea if this was of any interest, but I thought I should tell you about it.
(I just hope my post wasn't so annoying and didn't sound arrogant, whatsoever. My sister often complains about such things whenever I try to talk to her.. 😢)
Edit: Success! Managed to read that floppy. Content can be extracted with 7zip.
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