#Bos arch nemesis manual#
I bought one of those cheap manual winding 'machines' & made a mount for it, as well as a mandril and some disc like adapters. A dark art indeed! Since no one was responding to my E-I laminate purchase inquiries I decided to build my own trafo from my salvaged trash anyway. I then actually got brave and bothered Jack Eliano with this draft design, as he originally built Papa's OPTs and I admire him and have some of his PVA-2n's in a passive preamp, but he shared his final prototype design with me and it had different specs and anything I made with materials at hand would likely have inadequate dynamic range and bass extension. These windings would just about fit, haha, on the EI-125 laminations I salvaged from two MOTs, which were good by spec to at least 90VA at 60Hz. A 50W capable primary at that impedance could mean 56.6V primary, that meant 3.67A on the secondary, hence 16ga secondaries and 20ga primaries. As Papa said it was a winding ratio of about 2.82:1, so I settled on 264 turns primary against 94 turns secondary, mostly as bass extension to 25Hz required about 0.4H of primary inductance based on a primary impedance of 64 ohms. Lo and behold therein were specifications for a weird output transformer! One with a 64 ohm primary with an 8 ohm secondary, and a primary rated to 1.3A.
#Bos arch nemesis drivers#
Learning about current-source amplifiers as a match for full range drivers led me to Papa's exploration of the Jean Hiraga Nemesis design, first as the Arch Nemesis and later the SIT Nemesis, which paradoxically and perhaps unnecessarily pairs an output transformer with a FET. As I had no bobbin, I couldn't get my wound coil to fit back on the E-laminations and so I gave up. But I had collected a few of these and I was intrigued with the idea of winding my own choke on the laminations from one, so I cut one open with an angle grinder, hacked together a winding apparatus, and wound a coil. I briefly tested one in my MoFos, heard that it worked, and moved on. The idea of using the primaries of salvaged power transformers from microwave ovens as chokes came up. The versatility of the Arch Nemesis Bar shines in seated rows, allowing you to target different back muscles and improve your posture."Why are you applying for this job again? Are you sure you want it?"Ī while back I built MoFos. Slowly release the tension and repeat for a strong, well-defined back.Grip the bar with a neutral grip and pull it towards your abdomen, tucking your shoulder blades to power the pull.Attach the Arch Nemesis Bar to the lowest setting on your cable machine and sit facing it.This exercise engages your back muscles, helping you achieve that V-shaped torso you’ve always wanted. Slowly return the bar to the starting position and repeat.Grip the bar with a wide neutral grip and pull it down towards your chest.Attach the Arch Nemesis Bar to a lat pulldown machine and sit facing it.The arch shape of the bar makes skull crushers easier on your elbows, making this exercise more comfortable and efficient. Repeat for an effective triceps workout.
Lower the bar towards your forehead while keeping your upper arms still, then extend your arms to the starting position.Lie on a bench and hold the Arch Nemesis Bar with a neutral grip.The Arch Nemesis Bar is a game-changer for shoulder workouts, as it provides a comfortable grip and a natural range of motion. Lower the bar back to shoulder height and repeat.Push the bar overhead until your arms are fully extended.Stand with your feet hip-width apart and grip the Arch Nemesis Bar with a neutral grip.The neutral grip of the bar optimally targets your biceps, helping you build those impressive arm muscles without straining your wrists or shoulders. Lower the bar slowly and repeat for your desired number of reps.Curl the bar towards your chest, keeping your elbows close to your body.
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