(Last updated: 09-Apr-2012 19:49 )
Cover #2 in preparation. For interstage transformers. Coated with a very strong oven baked paint. Almost impossible to scratch it. With a decent "Lundahl" logo on it, not dominantly visible. The material is iron, for additional shielding against anything coming in or out. These are optimized for the Lundahl transformers, but of course you can mount also a smaller transformer inside, or a non-Lundahl transformer. Even fit in things like an electronically regulated tube heater power supply. That keeps away silicon devices from the amplifier inside bottem. Small air ventilation openings are present in top and bottem. Pre-drilled are the four holes for 2.5 kg transformers in Cover #1. The way to use these, is very nicely adapted to the purpose most users have. You can mount the bottem part (1) to the amplifier chassis. Then mount the transformer to the Part (1). Then mount Part (2) to the transfomer. Now you can conveniently wire the transformer, or measure on it while the side caps 3 + 4 not mounted yet. Later, after your are finished, you can mount the Side Caps 3 + 4. Very convenient is, when you want to re-wire an output transformer for another impedance, or when you want to make some measurements to the connections. Though it may not seem important to you at this moment, you always should consider the option to change the speaker output impedance when you change your loudspeaker. When the amplifier is large and heavy, you will be very unhappy if you want to make measurements in the transformers, and you need to put the whole thing upside down. With the Lundahl transformer covers, you can just remove the side caps 3 + 4.
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