Optonica

01 Dec 18
Mags Forum Electronics

I have an Optonica rp-7100h turntable that has developed a couple of issues.It has what appears to be an earth hum which is present with each of these settings earth wire from deck connected or disconnected.Cartridge connected or disconnected.Using amplifier with built in phono pre amp. Using av receiver with phono pre amp.I have also […]

25 Nov 18
Vintage Electronics

Pair of Optonica CP-2121 Speakers – Buy – Pair of Optonica CP-2121 Speakers

26 Oct 18
Vintage Electronics

Pair of Optonica CP-2121 Speakers – Buy – Pair of Optonica CP-2121 Speakers

26 Sep 18
Vintage Electronics

Pair of Optonica CP-2121 Speakers – Buy – Pair of Optonica CP-2121 Speakers

26 Aug 18
Vintage Electronics

Pair of Optonica CP-2121 Speakers – Buy – Pair of Optonica CP-2121 Speakers

31 Jul 18
Hackaday

This Bluetooth speaker is full of delightful surprises. The outer shell is an antique radio cabinet, but its practically empty interior is a combination of Dead Bug circuitry and modern BT receiver. [PJ Allen] found the BT receiver on Groupon and decided to whip up amplifier and threshold detector circuits using only parts he already […]