Another quality tube MM phono kit from Greek Radi0kit. This time in a Hammond wood cheek chassis and sprayed Indian Red. Also from Radi0kit the PS kit which employs regulated 12V for the filaments and electronically smoothed HT of better than 250V depending on load.
As with all these kits they sound excellent with the standard JJ 12AX7S tubes. Parts are quality;- ceramic sockets, Visheys, Dale, Nichicon and Cornell Dunbilier. Mantra is dead quiet, looks smart and sounds really great. Happy with the build.
A mix of MKT, Polyester and low ESR electro caps. All carbon film Rs through. Differential PS onboard. Genuine OPA2134 from RS and machined milspec socket. Two 9V batteries for about 50 to 100 hours play depending on battery type. I often use eBay lithium’s first 100 hours.
Cast Al enclosure with bituminised heavy Al in the bottom for resonance and vibration control. Paint is Epoxy Enamel with an etching primer. The finish is gloss and tough. This one is also called “Carbon” for obvious reasons.
Some don’t like carbon film resistors but I find they produce a very smooth sound but still let instruments shine in their own space. The preamp is new and requires about 50 hours to burn in. Listening to it with late model Rega P3 and Gerrott P77i cart. Very nice and to think it will improve
Yet another Class D compact 180W amp using the onboard PS. This means you only have to add a Tranni of the appropriate voltage and wattage to complete the amp. The enclosure is solid and in attractive two tone. It is fused and earthed. This one was built on commission. I‘m happy with the finish and sound. Extremely detail and excellent bass control.
Oatley released a headphone amp kit based on the OPA2134 - K465. A CMoy style simple HP amp based on the OPA2134. Oatley guarantees genuine OPA2134s and I have validated that. I received an early release which was assembled with pot and sockets on board. These were removed and the good input caps replaced with Russian PIO caps.
A larger ABS enclosure was used than the last two HP amps to accommodate the cct. brd and two 9V lithium batteries. The batteries are converted to differential supply on board - +/- 9V. The enclosure is lined with Al foil top and bottom and is earthed.
Once more my "safe on" wiring using the changeover switch on the input socket ensures the amp cannot accidentally be left on and drain batteries. The sound is good with excellent clarity, good volume and drive. The kit should be simple to assemble. The kit is complete with 9V battery clips and the ability to also use AA battery holders. You can see I am now spoiled for choice with three HP amps, one with the PT2308 chip and the others with OPA2134 chip.